E PA/600/R-96/009
March 1996
COMPILATION OF
SATURATED AND UNSATURATED ZONE MODELING SOFTWARE
(UPDATE OF EPA/600/R-93/118 and EPA/600/R-94/028)
by
Paul K.M. van der Hcijdc
Colorado School of Mines
International Ground Water Modeling Center
Golden, Colorado 80401
CR-818719
Project Officer
Joseph R. Williams
Subsurface Protection and Remediation Division
National Risk Management Research Laboratory
Ada, Oklahoma 74820
NATIONAL RISK MANAGEMENT RESEARCH LABORATORY
OFFICE OF RESEARCH AND DEVELOPMENT
U.S. ENVIRONMENTAL PROTECTION AGENCY
CINCINNATI. OH 45268

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DISCLAIMER NOTICE
The research described in this publication has been funded in part by the U.S. Environmental
Protection Agency under Cooperative Agreement # CR-818719 with the Colorado School of
Mines, Golden Colorado. It has been subjected to the Agency's peer and administrative review
and it has been approved for publication as an EPA document. Mention of trade names or
commercial products does not constitute endorsement or recommendation for use.
All research projects making conclusions or recommendations based on environmentally
related measurements and funded by the Environmental Protection Agency are required to
participate in the Agency Quality Assurance Program. This project did not involve
environmentally related measurements and did not involve a Quality Assurance Project Plan.
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FOREWORD
The U. S. Environmental Protection Agency is charged by Congress with protecting the
Nation's land, air, and water resources. Under a mandate of national environmental laws, the
Agency strives to formulate and implement actions leading to a compatible balance between
human activities and the ability of natural systems to support and nurture life. To meet these
mandates, EPA's research program is providing data and technical support for solving
environmental problems today and building a science knowledge base necessary to manage our
ecological resources wisely, understand how pollutants affect our health, and prevent or reduce
environmental risks in the future.
The National Risk Management Research Laboratory is the Agency's center for
investigation of technological and management approaches for reducing risks from threats to
human health and the environment. The focus of the Laboratory's research program is on
methods for the prevention and control of pollution to air, land, water, and subsurface resources;
protection of water quality in public water systems; remediation of contaminated sites and
ground water; and prevention and control of indoor air pollution. The goal of this research effort
is to catalyze development and implementation of innovative, cost-effective environmental
technologies; develop scientific and engineering information needed by EPA to support
regulatory and policy decisions; and provide technical support and information transfer to ensure
effective implementation of environmental regulations and strategies.
This publication has been produced as part of the Laboratory's strategic long-term research
plan. It is published and made available by EPA's Office of Research and Development to assist
the user community and to link researchers with their clients.
The model selection process for appropriate codes is a vital step to investigative research and
management decision-making for subsurface systems. This report provides an update to
Compilation of Ground-Water Models by P.K.M. van der Heijde and O.A. Elnawawy
(EPA/600/R-93/118, May 1993). The previous report presented a methodology used by the
International Ground-Water Modeling Center (IGWMC) to classify, evaluate and manage
descriptive information regarding ground-water modeling codes for the purpose of model
selection. This methodology is implemented in the MARS (Model Annotation and Retrieval
System) database. The current report presents an updated retrieval of information, and provides a
more inclusive and current description of both saturated and unsaturated zone models included in
the MARS database. Unsaturated zone model descriptions have been updated from
Identification and Compilation of Unsaturated/Vadose Zone Models (EPA/600/R-94/028, March
1994).
Clinton Hall, Director
Subsurface Protection and Remediation Division
National Risk Management Research Laboratory
lii

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ABSTRACT
The present report contains the results of the evaluation of the capabilities of a large number
of ground-water software designed for simulating flow, transport and fate processes in the
saturated and unsaturated zone, and for analyzing related ground-water management problems.
Specifically, the software has been described in terms useful to determine their applicability to
ground-water protection and remediation problems. This report is intended to serve as a first-
level screening tool when selecting software for a particular application.
The review of ground-water models and ground-water modeling related software has been
based on information gathered in recent years from many sources, including publications and
direct contact with the software developers. To manage the rapidly growing amount of
information, IGWMC maintains a descriptive software information system, MARS (Model
Annotation and Retrieval System). Detailed information on the reviewed programs is presented
in a series of tables. This report is an update of the reports Compilation of Ground-Water Models
by P.K.M. van der Heijde and O.A. Elnawawy (EPA/6G0/R-93/118, May 1993) and Identication
and Compilation of Unsaturated / Vadose Zone Models (EPA/600/R-94/028, March 1994).
iv

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TABLE OF CONTENTS
Foreword					 ii
Abstract									iii
List of Appendices 			v
List of Tables 					vi
Background and Report Organization 			vii
1.	INTRODUCTION			1
2.	IDENTIFICATION OF MODELING SOFTWARE	3
2.1.	Information Acquisition and Processing Procedures		 3
2.2.	MARS Information Data Base 								5
2.3.	Preparation of Information Tables 					5
3.	CONCLUDING STATEMENT 						16
4.	REFERENCES 							17
v

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LIST OF APPENDICES
A.	Cross-Reference Tables for Ground-Water Modeling Software
A-i. Sorted by Program Name						 A-l
A-2. Sorted by IGWMC-Key		 A-27
B.	Modeling Software Listed by Category and Sorted by Software Name
B-1. Single-phase Flow in the Saturated Zone
B-l.l. Analytical Models 	B-l
B-1.2. Numerical Models			B-2
B-2. Single-phase Flow in the Unsaturated Zone	B-5
B-3. Pathline and Capture Zone Analysis			B-7
B-4. Solute Transport in the Saturated Zone
B-4.1. Analytical Models 	B-8
B-4.2. Numerical Models			B-10
B-5. Solute Transport in the Unsaturated Zone 	B-l 2
B-6. Heat Transport		.			B-l3
B-7. Saltwater Intrusion 			B-l4
B-8. Multiphase Flow and Transport 			B-l6
B-9. Vapor Transport 	B-l7
B-10. Virus Transport 			B-l7
1 Til * 1 Til	J T\ 1 T-\ r*	_ i «	T~1 1 ff
-ll. Fluid Flow and Rock Deformation 					B-l7
B-l2. Parameter Estimation
B-12.1. Aquifer/Slug Test Analysis 			 B-l8
B-l2.2. Numerical Saturated Zone Flow Parameter Estimation	B-l8
B-12.3. Unsaturated Zone Flow Parameter Estimation		 B-19
B-12.4. Transport Parameter Estimation and Tracer Test Analysis	B-19
B-13. Geochemical Models 		B-19
B-l4. Optimization (Management) Models					B-20
B-l5. Simulation Models for Fractured Rock					B-21
vi

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B-16. (Geo-)statisical Analysis and Stochastic Simulation 				B-22
B-17. Ground-Water Related Exposure/Risk Assessment		 B-22
C.	Detailed Software Descriptions Sorted by IGWMC Key				 C-l
D.	Software References Sorted by IGWMC Key 					 D-l
E.	Cross-reference Table for Software Distributors
E-l. Sorted by Program Identification Number (IGWMC Key)			E-l
E-2. Sorted by Distributor Identification Number	E-7
LIST OF TABLES
1.	Summary of descriptive information groups used in MARS version 4.1. 			4
2.	Major software categories as classified in MARS version 4.1. 				6
3.	Search and sort criteria used in preparation of appendix A-D						9
vli

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BACKGROUND AND REPORT ORGANIZATION
The present report contains the results of research and information processing activities
performed by the IGWMC under a research cooperative agreement between The Colorado
School of Mines and the U.S. Environmental Protection Agency, initiated in 1991. The reports
present an update of the appendices of the report "Compilation of Ground-Water Models,"
prepared under a previous cooperative agreement with the US EPA (Report EPA/600/R-93/118).
The review of ground-water modeling and related software has been based on information
gathered by the IGWMC through research and interviews on an on-going basis since 1978,
increased in scope and depth-of-analysis as part of this cooperative agreement. To manage the
rapidly growing amount of information, IGWMC has redesigned its descriptive model
information system, MARS (Model Annotation and Retrieval System). Currently, this database
is operated as an RrBase 4.5 Plus application under MS-DOS 6.2. R.Base is a multi-platform,
relational database management system (Microrim, Inc., Bellcvue, Washington). Detailed
information on the reviewed software is presented in a series of tables in the appendix of this
report.
Appendix A provides cross-references between the unique database record identification
number (i.e., IGWMC Key), the name, title, or acronym of the software, and the authors.
Appendix A also refers to the detailed description of each program as provided in appendix C.
Appendix B provides an overview of the software, organized by software category or type. The
information in this appendix is cross-referenced with other appendices through the program
name and IGWMC Key. Appendix C includes detailed information on each program's author
and institution of development, the code custodian, level of documentation, verification and peer
review, and if it is proprietary or in the public domain. Furthermore, each description includes a
summary of the purpose of the program, the processes it may simulate, the general mathematical
method employed (boundary conditions and solution methods), ouptput options, and user
interface information. Finally, appendix D contains pertinent references sorted by IGWMC Key.
The author is grateful to P. Srinivasan, Milovan S. Beljin, Aly I. El-Kadi, Stan S. Williams,
and Suzanne S. Paschke for their contributions to the development of the IGWMC ground-water
modeling software information databases.
Paul K.M. van der Heijde
Golden, Colorado
viii

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1. INTRODUCTION
This report contains the results of the evaluation of the capabilities of a large number of
ground-water software designed for simulating flow, transport and fate processes in the saturated
and unsaturated zone, and for analyzing related ground-water management problems. It consists
of a brief discussion of research approaches, and tables containing detailed information regarding
more than 600 ground-water modeling programs. This report provides an update of information
contained in the appendices of the reports Compilation of Ground-Water Models (van der Heijde
and Elnawawy, 1993) and Identification and Compilation of Unsaturated,^Vadose Zone Models
(van der Heijde, 1994(a)).
Ground-water modeling is a computer-based methodology for quantitative analysis of the
mechanisms and controls of ground-water systems, and for the evaluation of policies, actions,
and designs that may affect such systems (van der Heijde et at, 1988). Ground-water models
range from complex, resource-intensive, predictive or recursive research tools to practical,
problem-solving tools. Most so-called "ground-water models" are based on mathematical
descriptions of physical, chemical, and biological processes active in a ground-water system, and
on the causal relationships among selected components of that ground-water system. Many of
these models focus on single-phase fluid flow in the saturated and/or unsaturated zone and the
migration of dissolved constituents. Other models provide for analysis of multi-phase fluid flow
and the complex chemical processes and phase transfers that might take place in such systems.
In recent years, powerful desktop computers and workstations have come within reach of
many ground-water professionals, facilitating extensive data management, complex simulations,
in-depth pre- and post-simulation analysis, and enhanced graphic display. Sophisticated general-
use software has been developed for wordprocessing, information management and display,
statistical analysis, and numerical calculations. These technological innovations have a
significant impact on the analysis of ground-water problems and the preparation of ground-water
management decisions. Moreover, in recent years the ground-water profession has seen a rapid
increase in scientific research regarding the physical, chemical and biological processes active in
the subsurface, the mathematical theories to describe these processes, and techniques and
methodologies to characterize field systems and the uncertainty in such characterizations. As a
result, computer-based decision-support in ground-water management has become much more
than using computer codes for the calculation of the responses of a ground-water system on past,
present and future stresses, the realm of "traditional" ground-water modeling. Increasingly,
computer-based decision-support takes the form of integrated software solutions for particular
types of management problems, where various data management, analysis and display tools are
(almost) seamlessly interwoven and embedded in a generic or problem-type, dedicated, user-
friendly computer interface. Such a software environment may even include non-site specific
databases and rule-based advisory systems.
To manage the information on such a wide variety of software, the International Ground
water Modeling Center has developed a new version of its ground-water modeling software
information database MARS (Model Annotation and Retrieval System; van der Heijde, 1994b).
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This database is designed to accommodate information regarding software for ground-water
simulation, geostatistical analysis, model input preparation, postprocessing of simulation results,
and various types of advisory systems. As of September 1994, this database contains, more than
800 software descriptions.
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2. IDENTIFICATION OF MODELS
2,1. Information Acquisition and Processing Procedures
The initial information on ground-water modeling software has come from review of the
open literature, from presentations and discussions at conferences, workshops, and other
meetings, and directly from researchers and software developers. Once a software item of
interest has been located, additional information is collected from the team that developed the
software, and from pertinent literature. The collected information is used to update the MARS
referral database. In selecting a software item for inclusion in this database, special attention is
given to the importance of the software for practical applications, and to its development status
(e.g., research tool or deliverable versus generally applicable, well-tested and documented routine
tool). Other considerations for inclusion in the database are prominence of the software name or
acronym, importance of software for research, and reputation of software development team.
Description of the software's concepts and mathematical framework are found in peer-reviewed
literature and in the software documentation. Operational characteristics, computer
requirements, and information on the level of testing to which the software has been subjected, is
taken from the user's manual, if available. Sometimes, software developers provide detailed fact
sheets useful for software characterization.
At the initiation of the project in 1991, the MARS database contained information regarding
a little over 700 ground-water modeling programs. In the initial phase of the project, these model
descriptions were evaluated for completeness, and categorized as "current" or "historic." The
records describing programs which were considered of historic value only were removed from
the database. Electronic database files and hard copies of the historic records have been
archived. The database records describing "current" software were the focus of the initial
database update. The result of this phase of information acquisition and processing was a
database of about 500 records, which served as the basis for the current version of MARS.
The second phase of information processing, has focused on updating the MARS descriptive
system (van der Heijde, 1994b). To incorporate new ground-water research developments and
advances in software environments and to make the data base more useful, the existing
descriptive system has been revised and expanded. The new descriptive system has been
implemented in version 4.1 of MARS. A summary of the descriptive terms used in MARS
version 4.1 is given in Table 1. In converting the contents of the earlier version of the data base
to this new version, many of the existing records have been edited, corrected, and expanded. In
the third and final phase of data collection and evaluation, more than 300 new descriptions have
been added to the data base, resulting in a total of 823 records at the end of September 1994.
3

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Table 1. Summary of descriptive terms used in MARS version 4.1.
General Information
•	IGWMC software identification
number (IGWMC Key)
•	Software name, current version and
release date
•	Software authors
•	Model category/type
•	Development objective
•	Abstract (short description of major
software characteristics)
•	Computer hardware / software
requirements
•	IGWMC evaluation of documentation
and code testing
•	Code input processing capabilities
•	Code output processing capabilities
•	Terms of code availability
•	Availability of model support
•	Name and address of code distributor
•	Name and address of code custodian
organization
•	Name and address of code
development organization
Details
•	Problem dimensionality capabilities
•	Hydrogeologic and/or soil layering
structure
•	Flow, solute transport, heat transport
and matrix deformation processes
addressed
•	Flow system characteristics
•	Soil/rock material type
•	Hydrogeochemical processes included
Boundary conditions supported
Numerical grid characteristics
Mathematical solution techniques
(formulation, solvers, inverse
approaches, optimization)
Input requirements
Output capabilities
Pertinent literature references
4

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2.2.	MARS Information System
Since the late 1970s, the International Ground Water Modeling Center, with support from
the U.S. Environmental Protection Agency, has maintained a computerized data base for storage
of information on ground-water models and related software. This data base, called MARS
(Model Annotation and Retrieval System), facilitates descriptive data for a wide variety of
programs dealing with fluid flow, vapor transport, and contaminant behavior in the saturated and
unsaturated zone. It contains information on software dealing with matrix deformation resulting
from water withdrawal and changes in overburden, transport of solutes, viruses, colloids and
heat, and hydrochemical reaction models. It also facilitates software descriptions regarding pre-
and post-processing, ground-water related data base, linkages between models and geographical
information systems, ground-water related expert systems, and geostatistical software. The
MARS system is frequently used for retrieval of information for research by IGWMC staff, and
in response to external requests.
In order to efficiently manage information concerning the rapidly increasing number of
ground-water modeling and related programs, the standardized software description developed
for earlier versions of the MARS data base has recently been expanded and updated (MARS
version 4.1, van der Heijde, 1994b). Key elements of the new descriptive system are the
systematic grouping of information and the use of standardized terms. Each software is
described in a rather uniform way by a set of annotations describing its purpose, major
hydrological, mathematical and operational characteristics, input requirements, output options,
computational capabilities, level of documentation, availability, and applicability. A complete
annotation includes comments made by IGWMC staff concerning its development, testing,
quality assurance and use; references regarding concepts, mathematical framework, operation,
and testing; and references describing instructive applications of the software.
2.3.	Preparation of Information Tables
The tables presented in Appendix A-D have been prepared using specially designed data
base reports in the MARS application using R:Base version 4.5 Plus for MS-DOS (Microrim,
Inc., Bellevue, Washington). Table 3 provides an overview of data base reports, and search and
sort criteria used in the preparation of the appendices. Following the data dump from the data
base, resulting information has been cross-checked among the tables, and reviewed for
completeness and correctness. Errors found in the spelling checks performed on the document
have been cross-checked with the data base.
5

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Table 2. Major software categories as classified in MARS version 4.1 (van der Heijde, 1994)
Category
Term
Description
1
saturated flow
ground-water flow in the saturated zone; including pathline,
streamline, and capture zone models based on flow equations
2
unsaturated flow
flow of water in the unsaturated zone; single phase or in conjunction
with air flow
3
vapor flow/transport
movement of vapor in soils and chemical interaction between vapor
phase and liquid and/or solid phase
4
solute transport
movement and (bio-)chemical transformation of water dissolved
chemicals and their chemical interaction with the soil or rock matrix
5
heat transport
transport of heat in (partially) saturated rock or soil
6
matrix deformation
deformation of soil or aquifer rock due to removal or injection of
water or changes in overburden
7
geochemical
chemical reactions in the fluid phase and between the fluid phase and
the solid phase
8
optimization
(optimization)
flow or transport models which includes mathematical optimization
to develop a 'best' management strategy
9
ground-water/surface
, water hydraulics
interaction between ground water and surface water described in
terms of fluid mass exchanges; hydraulics of both ground water and
surface water are described
10
parameter ID
unsaturated flow
calculation of the parameters of the soil hydraulic functions from
laboratory measurements
11
inverse model
numerical models for distributed flow and/or transport parameter
identification in the saturated zone
12
aquifer test analysis
analytical or numerical models for evaluation of aquifer flow
parameters from pumping tests
13
tracer test analysis
analytical or numerical models for evaluation of aquifer transport
parameters from tracer tests
more.....
6

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Table 2 - continued
Category
Term
Description
14
water/steam flow
heat transport models in which both the liquid and steam phases are
described and phase changes supported
15
fresh/salt water flow
sharp interface approach with either fresh water flow only, or flow in
both the fresh- and salt-water zone
16
multiphase flow
flow of water, NAPL and/or air/vapor
17
watershed runoff
watershed surface-, stream-, and ground-water runoff
18
surface water runoff
stream runoff routing
19
sediment transport
surface sediment transport
20
virus transport
transport of viruses
21
biochemical
transformation
hydrocherriical or solute transport models which include specific
biochemical reactions and population growth/die-off equations
22
pre-/postprocessing
model input preparation and output reformatting or display
23
stochastic simulation
including Monte Carlo analysis
24
geostatistics
kriging
25
multimedia
exposure/risk analysis
exposure assessmentfrisk analysis models for pound-water, surface
water and atmospheric pathways
26
expert system
ground-water oriented advisory system
27
data base
ground-water application-oriented data base
28
ranking/screening
classification; no simulation
29
fracture network
no primary porosity, connected fractures only; discrete network of
fractures connected at network nodes
30
porous medium
default medium type; primary porosity only
more.
7

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Table 2 - continued
Category
Term
Description
31
dual porosity medium
fractured porous medium with porous blocks intersected by
connected or non-connected fractures; mass exchange between
fractures and porous blocks
32
porous medium,
fractures
porous medium with individual fractures
33
karst
models specifically designed for karst systems (pipe flow, non-
Darcian flow, etc.)
34
water budget
lumped parameter approach for ground-water flow
35
heat budget
lumped parameter approach for heat flow
36
chemical mass balance
lumped parameter approach for solute transport
37
water level conversion
converting water level observations to velocities using Darcy's law
8

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Table 3. Search and sort criteria used in preparation of appendix A-D.
Appendix
Number
Description
Number
of
Records
Found
Contents
MARS
Report
Name
Search Criterion
Sort Criterion
A-l
Cross-
reference table
531
software name,
author, IGWMC
key, and page
number for detailed
description in
appendix C
alist-p
records which contain the term "general" in the
field "DevelPurpose" and do not contain the term
"historic" in the "CurrentRelease" field of the
"Generallnfo" table; this does not exclude the
term "research" (referring to research use), but
excludes codes which are considered research
codes only.
alphabetized by
software name
A-2
Cross-
reference table
531
software name,
author, IGWMC
key, and page
number for detailed
description in
appendix C
alist-p
records which contain the term "general" in the
field "DevelPurpose" and do not contain the term
"historic" in the "CurrentRelease" field of the
"Generallnfo" table
sorted by
IGWMC-Key
A-3
Cross-
reference table
531
software name,
author, and
IGWMC key
alist-p
records which contain the term "general" in the
field "DevelPurpose" and do not contain the term
"historic" in the "CurrentRelease" field of the
"Generallnfo" table
alphabetized by
last name of first
author
B-l.l
Analytical
models for
single phase
flow in the
saturated zone
43
software name, and
IGWMC key
categ-p
records which contain the terms "general" in the
"DevelPurpose" field, "saturated" in the
"ModelCategory" field, and "Analytical" in the
"Abstract" field, and do not contain the terms
"historic" in the "CurrentRelease" field and
"Unsaturated" in the "ModelCategory" field of
the "Generallnfo" table
sorted by software
name

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Appendix
Number
Description
Number
of
Records
Found
Contents
MARS
Report
Name
Search Criterion
Sort Criterion
B-1.2
Numerical
models for
single phase
flow in the
saturated zone
194
software name and
IGWMC key
categ-p
records which contain the terms "general" in the
"DevelPurpose" field, and "saturated" in the
"ModelCategory" field, and do not contain the
terms "historic" in the "CurrentRelease" field,
"Unsaturated" in the "ModelCategory" field, and
"Analytical" in the "Abstract" field of the
"Generallnfo" table
sorted by software
name
B-2
Models for
single phase
flow in the
unsaturated
zone
109
software name and
IGWMC key
categ-p
records which contain the terms "general" in the
"DevelPurpose" field and "unsaturated" in the
"ModelCategory" field, and do not contain the
terms "historic" in the "CurrentRelease" field of
the "Generallnfo" table
sorted by software
name
B-3
Models for
pathline and
capture zone
analysis
44
software name and
IGWMC key
categ-p
records which contain the terms "general" in the
"DevelPurpose" field and "pathline", flowline",
or :streamline" in the "Abstract" field, and do not
contain the terms "historic" in the
"CurrentRelease" field of the "Generallnfo" table
sorted by software
name
B-4.1
Analytical
models for
solute
transport in
the saturated
zone
47
software name and
IGWMC key
categ-p
records which contain the terms "general" in the
"DevelPurpose" field, "solute" in the
"ModelCategory" field, and "analytical" in the
Abstract field, and do not contain the terms
"historic" in the "CurrentRelease" field, and
"Unsaturated" in the "ModelCategory" field of
the "Generallnfo" table
sorted by software
name

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Appendix
Number
Description
Number
of
Records
Found
Contents
MARS
Report
Name
Search Criterion
Sort Criterion
B-4.2
Numerical
models for
solute
transport in
the saturated
zone
93
software name and
IGWMC key
categ-p
records which contain the terms "general" in the
"DevelPurpose" field, and "solute" in the
"ModelCategory" field, and do not contain the
terms "historic" in the "CurrentRelease" field,
"Unsaturated" in the "ModelCategory" field, and
"Analytical" in the "Abstract" field of the
"Generallnfo" table
sorted by software
name
B-5
Models for
solute
transport in
the
unsaturated
zone
59
software name and
IGWMC key
categ-p
records which contain the terms "general" in the
"DevelPurpose" field, and "solute" and
"unsaturated" in the "ModelCategory" field, and
do not contain the terms "historic" in the
"CurrentRelease" field, of the "Generallnfo" table
sorted by software
name
B-6
Heat transport
models
50
software name and
IGWMC key
categ-p
records which contain the terms "general" in the
"DevelPurpose" field, and "heat" in the
"ModelCategory" field, and do not contain the
terms "historic" in the "CurrentRelease" field of
the "Generallnfo" table
sorted by software
name
B-7
Saltwater
intrusion
models
20
software name and
IGWMC key
categ-p
records which contain the terms "general" in the
"DevelPurpose" field, and "salt" in the
"ModelCategory" field, and do not contain the
terms "historic" in the "CurrentRelease" field of
the "Generallnfo" table
sorted by software
name

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Appendix
Number
Description
Number
of
Records
Found
Contents
MARS
Report
Name
Search Criterion
Sort Criterion
B-8
Multiphase
flow and
transport
models
14
software name and
IGWMC key
categ-p
records which contain the terms "general" in the
"DevelPurpose" field, and "multiphase" in the
"ModelCategory" field, and do not contain the
terms "historic" in the "CurrentRelease" field of
the "Generallnfo" table
sorted by software
name
B-9
Vapor
transport
models
21
software name and
IGWMC key
categ-p
records which contain the terms "general" in the
"DevelPurpose" field, and "vapor" in the
"ModelCategory" field, and do not contain the
terms "historic" in the "CurrentRelease" field of
the "Generallnfo" table
sorted by software
name
B-10
Virus
transport
models
2
software name and
IGWMC key
categ-p
records which contain the terms "general" in the
"DevelPurpose" field, and "virus" in the
"ModelCategory" field, and do not contain the
terms "historic" in the "CurrentRelease" field of
the "Generallnfo" table
sorted by software
name
B-ll
Models for
fluid flow and
rock
deformation
21
software name and
IGWMC key
categ-p
records which contain the terms "general" in the
"DevelPurpose" field, and "deformation" in the
"ModelCategory" field, and do not contain the
terms "historic" in the "CurrentRelease" field of
the "Generallnfo" table
sorted by software
name
B-12.1
Aquifer/slug
test analysis
software
33
software name and
IGWMC key
categ-p
records which contain the terms "general" in the
"DevelPurpose" field, and "aquifer test" in the
"ModelCategory" field, and do not contain the
terms "historic" in the "CurrentRelease" field of
the "Generallnfo" table
sorted by software
name

-------
Appendix
Number
Description
Number
of
Records
Found
Contents
MARS
Report
Name
Search Criterion
Sort Criterion
B-12.2
Inverse
numerical
models for
saturated zone
flow
parameters
7
software name and
IGWMC key
categ-p
records which contain the terms "general" in the
"DevelPurpose" field, and "flow" and "inverse"
in the "ModelCategory" field, and do not contain
the terms "historic" in the "CurrentRelease" field
of the "Generallnfo" table
sorted by software
name
B-12.3
Programs for
determining
hydraulic
parameters in
the
unsaturated
zone
6
software name and
IGWMC key
categ-p
records which contain the terms "general" in the
"DevelPurpose" field, and "unsaturated" and
"parameter" in the "ModelCategory" field, and do
not contain the terms "historic" in the
"CurrentRelease" field of the "Generallnfo" table
sorted by software
name
B-12.4
Programs for
determination
of transport
parameters
(including
tracer test
analysis)
5
software name and
IGWMC key
categ-p
records which contain the terms "general" in the
"DevelPurpose" field, and "tracer test" or
"solute" and "inverse" in the "ModelCategory"
field, and do not contain the terms "historic" in
the "CurrentRelease" field of the "Generallnfo"
table
sorted by software
name
B-13
Geochemical
models
31
software name and
IGWMC key
categ-p
records which contain the terms "general" in the
"DevelPurpose" field, and "geochemical" in the
"ModelCategory" field, and do not contain the
terms "historic" in the "CurrentRelease" field of
the "Generallnfo" table
sorted by software
name

-------
Appendix
Number
Description
Number
of
Records
Found
Contents
MARS
Report
Name
Search Criterion
Sort Criterion
B-14
Optimization
(management)
models
9
software name and
IGWMC key
categ-p
records which contain the terms "general" in the
"DevelPurpose" field, and "optimization" in the
"ModelCategory" field, and do not contain the
terms "historic" in the "CurrentRelease" field of
the "Generallnfo" table
sorted by software
name
B-15
Models for
flow and
transport in
fractured rock
33
software name and
IGWMC key
categ-p
records which contain the terms "general" in the
"DevelPurpose" field, and "fractures" in the
"ModelCategory" field, and do not contain the
terms "historic" in the "CurrentRelease" field of
the "Generallnfo" table
sorted by software
name
B-16
Software for
(geo-)
statistical
analysis and
stochastic
simulation
22
software name and
IGWMC key
categ-p
records which contain the terms "general" in the
"DevelPurpose" field, and "statistic" or
"stochastic" in the "ModelCategory" field, and do
not contain the terms "historic" in the
"CurrentRelease" field of the "Generallnfo" table
sorted by software
name
B-17
Ground-water
related
exposure/risk
assessment
software
7
software name and
IGWMC key
categ-p
records which contain the terms "general" in the
"DevelPurpose" field, and "risk" or :exposure" in
the "ModelCategory" field, and do not contain
the terms "historic" in the "CurrentRelease" field
of the "Generallnfo" table
sorted by software
name
B-18
Geographical
information
systems and
data base
programs
3
software name and
IGWMC key
categ-p
records which contain the terms "general" in the
"DevelPurpose" field, and "GIS", data base" or
database" in the "ModelCategory" field, and do
not contain the terms "historic" in the
"CurrentRelease" field of the "Generallnfo" table
sorted by software
name

-------
Appendix
Number
Description
Number
of
Records
Found
Contents
MARS
Report
Name
Search Criterion
Sort Criterion
B-19
Modeling pre-
and
postprocessing
software
5
software name and
IGWMC key
categ-p
records which contain the terms "general" in the
"DevelPurpose" field, and "preprocessing",
postprocessing, or pre-/postprocessing" in the
"ModelCategory" field, and do not contain the
terms "historic" in the "CurrentRelease" field of
the "Generallnfo" table
sorted by software
name
C
Detailed
description of
all programs
531
almost all fields of
the Generallnfo,
Developer and
Custodian tables
compile
records which contain the terms "general" in the
"DevelPurpose" field, and do not contain the
terms "historic" in the "CurrentRelease" field of
the "Generallnfo" table
sorted by
IGWMC-Key
D
Software
references
1145
1145
refernce
records which contain the terms "general" in the
"DevelPurpose" field, and do not contain the
terms "historic" in the "CurrentRelease" field of
the "Generallnfo" table
sorted by
IGWMC-Key

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3. CONCLUDING STATEMENT
This report provides a catalogue of over 600 computer programs for analyzing ground-water
problems. Many of the programs include simulation capabilities allowing the user to perform
quantitative analyses of fluid flow, vapor transport and contaminant migration problems in the
saturated and/or unsaturated zone. The simulation models considered range from simple mass
balance calculations to sophisticated, multi-dimensional numerical simulators. Many of the more
recent computer programs include sophisticated user-interfaces and graphic output capabilities.
Increasingly, ground-water modeling software includes peripheral programs for geostatistical
analysis and data management, or separate programs are being developed for this purpose.
Linkages with general purpose commercial software (e.g., spreadsheet, CAD, GIS, contouring, and
line graphing software) are becoming common. Sometimes, ground-water simulation software is
embedded in a risk assessment framework or an expert system shell.
This report does not pretend to be complete in its listing of ground-water modeling related
software. Almost every week, the International Ground Water Modeling Center is informed of new
computer codes addressing some aspect of fluid flow and contaminant behavior in the subsurface,
as well as approaches to mitigation and prevention of pollution problems. Moreover, many codes
have been developed primarily for research purposes and are not readily accessible. Also, there are
many simple models based on mass balance evaluation or analytical solution of highly simplified
systems not presented in this catalogue. An effort has been made to select those 'simple' models
which are either known for their use in a regulatory or enforcement mode, or which are considered
representative for a certain type of models.
In compiling the information for the catalogue, some relevant issues have arisen. In many
cases, ground-water modeling documentation is insufficient to determine the actual implementation
of boundary conditions in the code, or the required detail in discretization in the spatial and
temporal domains. Running a model code, using test problems different than the example problems
provided in the documentation, might reveal specific model characteristics concerning accuracy,
stability, data preparation, or execution problems. This exercise will also provide insights to "tricks"
to handle these types of problems. It should be noted that most ground-water modeling software
address only a limited number of conditions encountered in the field.
This catalog provides readers an overview of available ground-water modeling programs and
related software. It serves as a first screening tool for selection of software for a particular
application. Initially, when used for software selection, a few programs should be identified for
further evaluation. Such evaluation should be based on analysis of software documentation, and
in some cases, test execution of the demonstration versions or fully executable versions of the
modeling programs. To provide guidance to this process, pertinent documentation references for
the software are listed in appendix D of this report.
16

-------
4. REFERENCES
van der Heijde, P.K.M., A.I. El-Kadi, and S.A, Williams. 1988. Groundwater Modeling: An
Overview and Status Report. EPA/600/2-89/028, U.S. EPA, R.S. Kerr Env. Res. Lab., Ada,
Oklahoma.
van der Heijde, P.K.M. and S.A. Williams. 1989. Design and Operation of the IGWMC MARS
(Model Annotation and Retrieval System). GWMI 89-03. IGWMC, Butler University,
Indianapolis, Indiana.
van der Heijde, P.K.M., and O.A. Elnawawy. 1993. Compilation of Ground-Water Models,
EPA/600/R-93/118, U.S. EPA, R.S. Kerr Env. Res. Lab., Ada, Oklahoma.
van der Heijde, P.K.M. 1994(b). Design and Operation of a Ground-water Software Information
Data Base: Model Annotation and Retrieval System 'MARS'; version 4.1. GWMI 94-06,
IGWMC, Colorado School of Mines, Golden, Colorado.
van der Heijde, P.K.M. 1994(a). Identification and Compilation of Unsaturated / Vadose Zone
Models, EPA/600/R-94/028, U.S.EPA, Robert S. Kerr Environmental Research Laboratory,
Ada, Oklahoma.
17

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-------
Appendix A-l. Cross-reference table for ground-water modeling software
alphabetized by program name
MODEL NAME
AUTHORS
IGWMC
KEY
PAGE
ID Unsaturated Flow
1DFEMWATER
2D SAT/UNSAT FLOW
2D-DIFF
2D- FED
2D-SEEP
2D-STES Model
3D Finite Element Dual
Porosity Flow and
Transport Model
3DFEMWASTE/3DLEWASTE
3DFEMWATER
ABCFEM
AIR
AIRFLOW
ANALYT
AQ-AP
AQ-AS
AQ-AT
AQ-EF
AQ-FEM
AQ/3ASIC GWF
AQMAN (AQuifer MANagement)
AQMODEL
AQTESOLV
AQO-1
Jensen, K.H.	4180
Yeh, G.T.	8520
Blandford, G.E.	4170
Silka, L.R.	7140
Sherif, M.M., V.P. Singh,	7130
and A.M. Amer.
Kimura, H.	5890
Reffstrup, J.	3850
Glover, K.C.	5022
Yeh, G.T,, and V.S. Tripathi 3379
Yeh, G.T.	3377
Brown, A,, and R. Hertzman	8560
Lin, C., and W. Kinzelbaeh	6605
Franz, T., and N. Guiguer	4923
Kolesov, A.A.	8510
Kovar, K., and A. Leijnse	4750
Kovar, K., and A. Leijnse	4752
Kovar, K., and A. Leijnse	4751
Leijnse, A., and K. Kovar	4754
Leijnse, A., and K. Kovar	4753
Verruijt, A.	6030
Goreliek, S.M., and L.J.	3092
Lefkoff
O'Neill, G.T.	5710
Duffield, G.M.	6670
Rushton, K.R., and L.M.	1230
Tomlinson
C-149
C-387
C-148
C- 367
C-366
C-288
C -117
e-215
C- 91
€-89
C- 390
C-333
C-201
C-387
C-180
G-181
C-181
C-182
C-182
C- 296
C- 75
C-274
C- 337
C-37
A-l

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MODEL NAME
AUTHORS
KEY
PAGE
AQUA
AQUAEM (AQUifer
Analytic Element Model)
AQUAMOD
AQUIFEK
AQUIFEM-1/AQUIFEM-N
AQUIFEM-SALT
AQUIFLOW
AQUITHAN
AQUIX-4S
ARMOS (Areal
Multiphase Organic
Simulator)
ASM (Aquifer
Simulation Model)
AT123D
BALANCE
BALANCE
BEAVERSOFT
BIOID
BIOPLUME II
BORHOL
CADIL/AGTEHM
CANSAZ (EPACMS5
Kjaran, S.P., D. Egilson,
and S.Th. Sigurdson
Chen,
and P. Hall
van Tonder, G., and H.J.
van Rensburg
Pinder, G.F., and C.I. Voss
Townley, L.R., J.L. Wilson,
and A.A.G. Sa da Costa
Voss, C.I.
Yeh, G.T., and C.W. Francis
Yeh, G.T., and C.W. Francis
Gilmer, T.
Kaluarachehi, J.J., J.C.
Parker, J.L. zhu, and
A.K. Katyal
5018
8370
5730
514
2630
3B32
3372
3378
6680
5184
Kinzelbach, w., and R. Rausch 6603
Yeh, G.T., et al.	6120
Parkhurst, D.L., L.N. Plummer, 3400
and D.C. Thorstenson
Wesseling, J.G.	8440
Bear, J., and A. Verruijt	6590
Srinivasan, P., and J.w.	5500
Mercer
Rifai, H.S., P.B. Bedient,	4910
R.C. Bordon, and J.F. Haasbeek
Rickertsen, L.D., C.J.	696
Noronha, and M. Reeves
Emerson, C.J., B. Thomas,	4290
R.J. Luxmoore, and D.M. Hetrick
Sudicky, E.A., J.B. Kool,	5330
and P.S. Huyakorn
C-214
C-383
C-275
C-13
C-56
C-114
C-86
C-90
C-338
C-235
C-331
C- 300
C-92
C- 384
C- 329
C-258
C-196
C - 24
C -150
C-251
A- 2

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MODEL NAME
AUTHORS
IGWMC
KEY
PAGE
CANVAS
CAPZONE
CATTI
CCC
CFEST (Coupled, Fluid,
Energy and Solute
Transport)
CFITIM
CHAIN
CHAINT
CHARGR
CHEMFLO
CHEMRANK
CHEMTRN/THCC
CHEQMATE
CHROKAT
CMIS (Chemical
Movement in Soil)
CMLS (Chemical
Movement in Layered
Soils)
COMPAC
Computer Simulation
of Soil Water Movement
and Plant Uptake
CONFLOW
CONS2 -ID
Park, N-S., T.N. Blandford,	3945
Y - S. Wu and P.S. Huyakorn
Bair, E.S., A.E. Springer	6940
and G.S. Roadcap
Sauty, J.P., and W. Kinzelbach 6600
Lippmann, M.J., T.N.	100
Narasimhan, D.C. Mangold, and
G.S. Bodvarsson.
Gupta, S.K., C.T. Kincaid,	2070
P.R. Meyer, and C.R. Cole
van Genuchten, M.Th.	6227
van Genuchten	6225
Kline, N.W., R.L. England,	3791
and R.C. Baca
Pritchett, J.W.	2761
Nofziger, D.L., K. Rajender, 6712
S.K. Nayudu, and P-Y. Su.
Nofziger, D.L., P.S.C. Rao,	6640
and A.G. Hornsby
Miller, C.W., L.V. Benson,	3610
and C.L. Carnahan
Haworth, A., S.M. Sharland,	5350
P.W. Tasker, and C.J. Tweed
6701
Nofziger, D.L., and A.G.	6710
Hornsby
Nofziger, D.L., and A.G.	6711
Hornsby
Helm, D.C.	80
Hayhoe, H.N., and R. De Jong 6760
Hertel, E.S., Jr.
Desai, C.S.
2770
3865
C-128
C-356
C-330
C-3
C-46
C- 306
C-305
C-109
C- 63
C-344
C- 335
C -102
C-254
C-340
C-342
C- 343
C-3
C- 346
C - 63
C-120
A- 3

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MODEL NAME
AUTHORS
IGWMC
KEY	PAGE
CONSA (li) - 2D
CONSP(L/NL) - 2D
COVAR
CRACK
CREAMS
CRREL (Flow Lines
Program)
CSUFDM {Colorado State
University Finite
Difference Model)
CSUGAS
CSUPAW (Colorado State
University Pit And
well)
CTRAK/W (Contaminant
Transport)
CTRAN/W, SEEP/W
CXPMPM
CXTFIT
Cyclic Storage of
Fresh Water in Saline
Aquifers
DEEP PERCOLATION MODEL
DEL-V
DELTA
DEWATER
DFT/C-1D
DISIFLAQ
DISPER
Desai, C.S.
Desai, C.S.
Williams, S.A., and A.I.
El- Kadi
Sudicky, E.A.
Knisel, W.G.
Daly, C.J.
3867
3866
6334
6660
3540
2791
C-121
C-120
C - 319
C-336
C-97
C-64
Close, B., J.W. Warner,
G. Sunada, and D.K. Sunada
5392
C-255
Sabacell, G.P., J.J. Eisenbeis, 5390
and D.K. Sunada
C-254
Sunada, D.K.
5391
C-255
5340
C-253
Slotta, L.S.
Parker, J.C., and M. Van
Genuchten
Kimbler, O.K.
7500
5211
3432
3650
C-372
C-243
C-95
C-105
Bauer, H.H., and J.J. Vaccaro 5960
van Tonder, G., and H.J.	5731
van Rensburg
Morel-Seytoux, H.J,, C.	260
Rodriquez, and C. Daly
Sagar, B.	3231
Desai, C.S.	3860
Berney, 0.	2870
Maloszewski, P.	6290
C-290
C -276
C-9
C-78
C-117
C- 67
C- 311
A- 4

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MODEL NAME
AUTHORS
IGWMC
KEY
PAGE
DIVAST
DOSTOMAN
DRAINMOD
DRASTIC
DREAM
DSC (Discrete
Compartment MocLe 1)
DSTRAM (density-
dependent Subsurface
Transport Analysis Model)
DYNFLOW
DYNTRACK
E4CHEM {including
EXSOL)
ECLIPSE
EIS/GWM
EPA-VHS
EPACML
EPACMTP (FECTUZ,
CANSAZ- 3D)
EQ3/EQ6
EQUILIB
ESTIM
FASTCHEM
FASTEP/WELLCOST
FD/FE Darcy Velocities
Dillon, P.J.
King, C.M., E.L. Wilhite,
R.w. Root, Jr., D.J.
Fauth, et A1.
Skaggs, R.W.
Aller, L., T. Bennett,
J.H. Lehr, R.J. Petty, et al.
Bonn, B.A., and S.A. Rounds
Campana, M.E., and E.S.
Simpson
Huyakorn, P.S.
Riordan, P.J., R.P. Schreiber,
and B.M. Harley
Riordan, P.J., D.J. Schroeder,
and B.M. Harley
Rohleder, H., M. Matthies,
R. Bruggemann, B. Munzer,
B. Schernewski, and S. Trapp
Van der Heijde, P.K.M.
Saleem, Z.A., A.M. Salhotra,
D. Marder, J. Kool,
B. Lester, and M. Ungs
Saleem, Z.A., P.S. Huyakorn,
J. Kool, A. Salhotra,
P, Mineart, and E.A, Stidicky
Wolery, T.J.
Morrey, J.R., and D.W. Shannon
Hills, R.G.
Kincaid, C.T.
Ulrick, J.
Batu, V.
8010
4540
1950
4950
4670
3990
4700
4940
4941
7230
8110
8400
6501
5331
5332
4810
4 82 0
5970
5840
5020
4150
C- 375
C -159
C-43
C-206
C-171
C -142
C-175
C-204
C-206
C - 372
C - 379
C - 384
C-330
C-251
C-252
C -185
C-185
C -291
C-284
C - 214
C-148
A- 5

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MODEL NAME
AUTHORS
IGWMC
KEY
PAGE
FE model for 2D Steady
State Flow in Confined
Aquifer
FE3DGW
FEGW3
FEM301
FEMA (Finite Element
model of Material
transport through
Aquifers)
FEMSAT
FEMSAT
FEMSEEP
FEMTRAN
femwaste/fecwaste
FEMWATER/FECWATER
FEWA (Finite Element
model of Water flow
through Aquifers)
FIELD-2D
FINITE
FINITE-Mine Hydrology
FLAMS
FLAMINGO
FLASH
FLO
FLOFIT
FLONET
FLOP, FLOP-LIESTE,
FL0P-Z1, FL0P-2N
FLOSA (FLOw Systems
Analysis)
Kuniansky, E.L.	5810
Gupta, S.K., C.R. Cole,	2072
and F.W. Bond
Yoon, Y.S.	7120
Kiraly, L.	4500
Yeh, G.T,, and D.D. Huff	3376
Van Bakel, P.J.T.	3350
Maslia, M.L.	3770
Meiri, D.	5120
Martinez, M.J.	4350
Yeh, G.T., and D.S. Ward	3371
Yeh, G.T., and D.S. Ward	3370
Yeh, G.T., and D.D. Huff	3373
Desai, C.S.	3861
5130
Koch, D.H.	6302
Baca, R.G., and S.O. Magnuson	5661
Huyakorn, P.S.	4630
Baca, R.G., and S.O. Magnuson	5660
Vandenberg, A.	1092
Kool, J.B., S. Mishra,	5187
and J.C. Parker
Franz, T.	4922
van den Akker, C., R. Lieste,	1820
and E.J.M. Veling
Zijl, W., and M. Nawalany	4660
C-280
C-48
C-365
C -157
e-86
C - 83
C-108
C-225
C -152
C- 86
C- 84
C- 87
C-118
C-226
C-312
C-269
C-166
C-269
C-36
C-238
C-200
C-41
C-170
A- 6

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MODEL NAME
AUTHORS
IGWMC
KEY
PAGE
FLOTRA
FLOTRANS
FLOW2D
FLOW3D
FLOWCAD
FLOWNET
FLOWNS
FLOWPATH
FLOWQ3D/TRIAG
FLOWTHRU
FLSTAT
FLUMP
FLUMPS
FOWL (FOssil fuel
combustion Waste
Leaching)
FP
FRACFLO
FRACFLOW
FRACPORT
FRACQUAL
FRACSOL
FRACT
FREESURF
FRESAL
Fresh Water Lens
Sagar, B.	3235
Franz, T.	8130
Durbin, T.J.	7100
Durbin, T.J., and	5560
C.Berenbroeck
Franz, T.	4921
Van Elburg, H., C.J.	5001
Hemker, and G.B. Engelen
Bramlett, W., and R.C.Borden	5200
Franz, T., and N. Guiguer	4920
Mallory, M.J., and T.J.Durbin	2640
6860
Lieste, R., E.J.M.Veling,	5570
and C.Van den Akker
Narasimhan, T.N., and	122
S.P. Neuman
Neuman, S.P., C. Preller,	25
and T.N. Narasimhan
Hostetler, C.J., R.L.	5033
Erikson, and M.L. Kemner
Su, C., and R.H. Brooks	6170
Gureghian, A.B.	4083
4632
De Angelis, D.L., G.T. Yeh,	3374
and D.D. Huff
Koch, D.H.	6304
Grisak, G.E., and J.F.	2037
Pickens
Pickens, J.F.	2032
Hufsehmied, P.	4510
Kovar, K.	5540
Ayers, J.F., and H.L. Vacher	4020
C-80
C- 380
C - 364
C-264
C-199
C-211
C-242
C-198
C - 58
C- 350
C-265
C-7
C-2
C-218
C-302
C -145
C-168
C - 87
C- 313
C-45
C- 44
C-157
C- 263
C-143
A- 7

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MODEL NAME
AUTHORS
IGWMC
KEY
PAGE
FRONT
FTKANS {fracture Flow,
Therma1 and
RAdioNuclide Solute
transport)
PTWORK
GAFETTA
Galerkin Finite
Element Solute
Transport Model
GAS3D
GEO-EAS
GEOBASE
GEOCHEM
GEOFLOW
GEOPACK
GEOTHER, GE0THER/VT4
GEOTRACK
GETO'JT
GFLOW
GGWP (Golder
Groundwater Computer
Package)
GIS\Key
GLEAMS
GLOVER
GM5 (Groundwater Model 5)
Graphic Groundwater
van den Akker, C.	1822
Huyakorn, P.S., et al.	581
Faust, C.R., P.N. Sims,	5520
C.P. Spalding, and P.F.
Andersen
Pinder, G.F., P.E. Kinnnark,	513
and C.I. Voss
Tracy, J.v.	3882
Sepehr, M., and Z.A. Samani	6920
Englund. E., and A. Sparks	6990
Hall, P.	8360
Sposito, G., and S.V. Mattigod 4830
Haji-Djafari, S., and	3220
T.C. Wells
Yates, S.R., and M.V. Yates	6980
Faust, C.R., and J.W. Mercer	730
Srinivasan, P.	5501
Burkholder, H.C., M.O.	2080
Cloninger, W.V, Dernier,
P.J. Lidell, and G. Jansen
Haitjema, H.M.	1793
Miller, I., and J.	1010
Marlon-Lambert
Stevens, K.	7980
Leonard, R.A., W.G. Knisel,	3541
and F.M. Davis
Spinks, M.P.	5140
Liggett, J.A.	3240
Esling, S.P.	7031
C-42
C-15
C-261
C-13
C-124
C-355
C-359
C-382
C -186
C- 77
C-358
C- 25
C-259
C-49
C-40
C-35
C-374
C-98
C - 226
C- 83
C- 361
A-8

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MODEL NAME
AUTHORS
IGWMC
KEY
PAGE
GRDFLX
GREASE
GRID BUILDER
GRITS/STAT
GROMAGE
GROMULA (GROundwater
flow in a MUlti-LAyer
system)
GROUND
Ground-water Recharge
Groundwater Discharge
Tests: Simulation and
Analysis
GROWKWA
GS2
GS3
GSAS
GTC (Group Transfer
Concentration)
GW-UN/DTCD
GWAP (Graphical Well
Analysis Package)
GWFL3D
GWFLOW
gwflow/gwmesh/gwplot
GWHEAD
Codell, R.B., K.T. Key,
and G. Whelan
Huyakorn, P.S., et al.
Gilding, B.H., and J.W.
Wesseling
Broks, A.P.M., D. Dijkstra,
and J.W, Wesseling
Codell, R.B., K.T. Key,
and G. Whelan
Sunada, D.K., J.W. Warner,
and D.J. Mo1den
Clarke, D.
Wesseling, J.W.
Segol, G., G.F, pinder,
and E.0. Frind
Segol, G., G.F. Pinder,
and E.O. Frind
Loftis, J., and H. Horsey
Yu, c., w,A. Jester, and
A.R. Jarrett
Karanj ac, J., and D.
Braticevic
Dansby, D.A.
Walton, W.C.
van der Heijde, P.K.M.
Warner, J.W., and
D.D.Walker
Beckmeyer, R.R., R.W.Root,
and K.R.Routt
3380
582
5249
7160
2981
2980
6100
6260
5460
2982
2891
2892
7150
5028
4730
5040
6353
6023
3101
2880
C- 92
C-15
C-245
C-368
C- 73
C-72
C-300
C-310
C-256
C-73
C-69
C-70
C- 367
C-217
C-179
C-221
C-321
C ¦ 2 94
C-75
C-68
A-9

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MODEL NAME
AUTHORS
IGWMC
KEY
PAGE
GWMAN
GWMD3 - Appropriation
Model
GWPATH
GWPT
GWSIM-II
GWT
GWTHERM/EP21
GWTR3D
GWUSER/CONJUN
HEADCO
HELP (Hydrologic
Evaluation of Landfill
Performance)
HOTWTR
HPP-GMS
HPS
HSSM (Hydrocarbon
Spill Screening Model)
HSSWDS
HST3D
HVRLV 1
HWELL
HYDROPAL
HYDRUS/WORK
War.akule, N. , N.W. Mays,
and L.S. Lasdon
Jorgensen, D.G., H.
Grubb, C.H. Baker Jr.,
and G.E. Hi lutes
Shafer, J.M.
Walton, W.C.
Knowles, T.R.
Runchal, A., J. Treger,
and G, Segol
Walton, W.C.
Kolterman, C.R.
Spane, Jr., F.A.
R.B. Mercer
and
Schroeder, P.R., J.M. Morgan,
T.M. Walski, and A.C. Gibson
Reed, J.E.
Blaschke, A.P. and G. Bloschl
Galya, D.P.
Weaver, J.W., R.J. Charbeneau,
J.D. Tauxe, B.K. Lien,
and J.B. Provost
Perrier, E.R., and A.C.
Gibson
Kipp, Jr., K.L.
Weyer, K.U., and W.C.
Horwood- Brown
Beljin, M.S.
Kool, J.B., and M.Th. van
Genuchter.
4480
3870
6650
6352
680
6910
2830
6354
4070
5880
4800
612
8020
5700
8530
4410
4610
3150
6383
5150
6229
C-155
C-122
C- 336
C-321
C-21
C- 354
C-66
C- 322
C -143
C-287
C-183
C-20
C-376
C - 273
C - 388
C-155
C-164
C-76
C-325
C- 227
C-308
HYPERVENTILATE
Johnson, P.C,
5940
C-289
A-10

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MODEL NAME
AUTHORS
IGWMC
KEY
PAGE
IDPNGM
IGSM (Integrated
Groundwater and
Surface Water Model)
IIHR Model
INFGR
INFIL
INFIL1D
INFSEAL
Inj ection Model
INTERCHANGE
INTERFACE
INTERSAT
INTERTRANS
INVERS
IONMIG
JDB2D/3D
KANSASHEAT
LAYFLO
LEACHM
LEAKY
LTIRD
M3
MADPD (Matched
Artificial
Dispersivity -
Principal Direction
method)
MAF (Multiple Aquifer
Flow)
Guvanasen, V.	951
Yoon, Y.S., and M.N. Saquib	5510
Jain, S.C.	3550
Craig, P.M., and E.G. Davis	4380
Vauclin, M.; A.I. El-Kadi	3570
(IGWMC version)
Simmons, C.S., and T.J. MKeon	6320
Moore, I.D.	¦ 3690
Laux, S.J., and B.A. Benedict	4011
Glover, K.C.	5670
Page, R.H.	2720
Voorhees, M.	5160
Voorhees, M.	5161
Elderhorst, W.I.M.	3950
Russo, A.J.	4360
Bredehoeft, J.D.	5720
Willhite, G.P., and J. Wagner	3580
Gureghian, A.B., and G.	4082
J ans en
Wagenet, R.J., and J.L.	3411
Hutson
Koch, D.H.	6301
Javandel, I., C. Doughty,	6310
and C.F. Tsang
Van Veen, J.A.	373 0
Syriopoulou, D., and	5270
A.D. Koussis
Roelse, A., Maas, K.	5790
C-34
C-260
C - 99
C-154
C-99
C- 317
C -106
C-142
C-270
C-61
C-228
C-228
C-130
C-153
C-275
C-100
C-145
C-94
C-312
C- 314
C-106
C-247
C-280
A-11

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MODEL NAME
AUTHORS
KEY
PAGE
MAGICS
MAGNAS
MAGNUM-2D
MAGNUM-3D
MANAGES
MAP
MAQWF
MAQWQ
MARIAH
MASCOT
MASS
MAST-2D
MATS (Microcomputer
Aquifer Test
Evaluation)
MATTUM
MFLOP (FLOw Pattern)
MICROFEM
MIGSTEM-3D
MIKE SHE
MINEFLO
MINEQL2
MINTEQ/MINTEQ2
Huyakorn, P.S.	5821
Huyakorn, P.S., and J. Kool	5820
England, R.L., N.W. Kline,	4590
K.J. Ekblad, and R.G. Baca
Estey, S.A., R.C. Arnett,	4591
and D.R. Aichele
8040
Einberger, C.M.	6890
Contractor, D.N., S.M.A.	4530
El Didy and A.S. Ansary
contractor, D.N., S.M.A.	4531
El Didy and A.S. Ansary
Gartling, D.K., and C.E.	262 0
Hickox
Gureghian, A.B.	4620
van Tonder, G., and H.J.	5732
van Rensburg
Desai, C.S.	3868
Hemker, C.J.	5002
Yeh, G.T., and R.J. Luxmoore 3375
Hemker, C.J.	5004
Hemker, C.J., and H. van	5000
Elburg
Ohnuki, T.	5891
Abbott, M.B., J.C. Bathurst, 7210
J.A. Cunge, P.E. C 1 Conr.ell,
and J. Rasmussen
Aljoe, W.A., and J.W. Hawkins 5290
Westall, J.C., Z.L.	4840
Zaehary, and F.M.M Morel
Felmy, A.R., D.C, Girvin,	4850
and E.A. Jenne
C-282
C-281
C-162
C-162
C-378
C- 353
C-158
C-158
C - 55
C -165
C-277
C-121
C-212
C - 88
C-212
C-210
C-289
C-370
C-247
C-187
C-187
A-12

-------
MODEL NAME
AUTHORS
KEY
PAGE
MINTEQA2
MLSOIL/DFSOIL
MMT-1D
MOCDENSE
MOD3DFD/MODLMAKR
MODELCAD
(Computer-Aided Design
for Ground-Water
Modeling)
MGDFE/FEMOD
MODFLOW
MODFLOW - INTERBED
STORAGE PACKAGE
MODFLOWP
MODINV - MODFLOW
Parameter Optimization
MODMAN (MODflow
MANagexent)
MODMOC- 3D
MODPATH
MODRET
MOFAT
MOISTRE/Biological -
Chemical
MOISTRS
MOSES
MOTIF (Model of
Transport in
Fractured/Porous Media)
Allison, J.D., D.S. Brown	4852
and K.J. Novo -Gradac
Sjoreer., A.L., D.C.	4140
Kocher, G.G. Killough,
C.W. Miller, et al.
Kaszeta, F.E., C.S.	781
Simmons, and C.R. Cole
Sanford, W.E., and L.F. Konikow 742
Spinks, M.P.	3988
Rumbaugh, J.O., III., and	6690
G.M. Duffield
Torak, L., and R.L. Cooley
McDonald, M.G., and A.W.
Harbaugh
Leake, S.A., and D.E. Prudic
Hill, M.C.
Doherty, J., R.E, Volker,
and R.G. Pearson
Greenwald, R.M.
Williams, P.
Pollock, D.W.
Kaluarachchi, J.J, and
J.C. Parker
Dutt, G.R., M.J. Shaffer,
and W.J. Moore
Warrick, A.W., and
A. Amoozegar-Fard
Guvanasen, V.
4100
3980
3985
3987
3981
3983
5470
3984
4680
5180
2960
2961
7050
4550
C-188
C-147
C-34
C - 29
C-140
C- 339
C-146
C-131
C-138
C -139
C-134
C-136
C-257
C-137
C-171
C-230
C-71
C - 72
C- 362
C-160
A-13

-------
MODEL NAME
AUTHORS
KEY
PAGE
MOTRANS
MOUSE
MT3D (Modular Transport
in 3 Dimensions)
MULAT
MULTIMED
MUSHRM
MUST (Model for
Unsaturated flow above
a Shallow water Table)
MYGRT
NEFTRAN/NEFTRAN-S
NETFLO (Network Flow)
NETPATH
NEWSAM/NEWVAR
NFLUX/SALTFLO
NITRO
NITROSIM
NMFD-3D
NMODEL/WASTEN
NON-LINEAR FE/FD
REGRESSION GROUNDWATER
FLOW MODEL
Katyal, A.K., and
J.C. Parker
Pacenka, S., and T.
Zheng, C.
Verruijt, A.
5185
Steenhuis 6390
4970
8500
Salhotra, A.M., P. Mineart,	5630
S. Sharp-Hansen, and T. Allison
Pritchett, J.W.	2760
DeLaat, P.J.M.	1771
Summers, K.v., s.A. Gherini, 6700
M.M. Lang, M.J. Ungs, et al.
Campbell, J.3., C.D. Leigh,	5025
D.E, Longsine, E.J., Bonano,
and C.P. Harlan
Pahwa, S.B., and B.S, Rama Rao 695
Plummer, L.N., E.C.Prestemon, 3621
and D.L.Parkhurst
Ledoux, E., G. De Marsely,	8540
A. Levassor, S. Sauvagnac,
and A. Rivera
Wagenet, R.J., W.R. Tillotson, 3410
C.W. Robbins, and R.J. Hanks
Kaluarachchi, J.J., and	5186
J.C. Parker
Rao, P.S.C.	280
Posson, D.R., G.A. Hearne,	2740
J.V. Tracy, and P.F. Frenzel
Selim, H.M., J.M. Davidson,	290
and I.K. Iskander
Cooley, R.L., and R.L. Naff	195
C-236
C- 325
C-207
C-386
C- 268
C- 62
C - 37
C-339
C-216
C- 23
C-103
C-389
C-93
C-238
C-10
C-61
C-10
C-8
NORIA
Bixler, N.E.
5480
C-258
A-14

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MODEL NAME
AUTHORS
IGWMC
KEY
PAGE
NUSEEP
OASIS
ODAST
OILEQUIL
ONE - D
ONESTEP
OPTIC
OPTP/PTEST
PARAMETER-ESTIMATION
PROGRAM
PAT
PATH3D
PATHRAE
PCTRANS
PESTAN/PESTRAN
PESTRUN
PHREEQE
PHREEQM-2D
PHRQPITZ
PLASM
PLUME
PLUME2D
Newell, C.J,, J.F.
Haasbeek, J.P. Hopkins,
S.E. Alder-Schaller, et al,
Javandel, I., C. Doughty,
and C.F. Tsang
van Genuchten, M. Th.,
and W,J. Alves
Kool, J.B., J.C. Parker,
and M.Th. Van Genuchten
Paudyal, G.N., and A. Das
Gupta
Tracy, J.V.
Kinzelbach, W., and R, Rausch
Zheng, C.
Fjeld, R.A., A.W. Elzerman,
T.J. Overcamp, N. Giannopoulos,
et al.
Enfield, C.G., R.F. Carsel
S.Z. Cohen, T.Phan, et al.
McCal1,Jr., E.G., and D.D.Lane
Parkhurst, D.L., D.C.
Thorstenson, and L.N. Plummer
Willemsen, A.
Plummer, L.N., D.L.
Parkhurst, G.W. Fleming,
and S.A. Dunkle
Prickett, T.A., and C.G,
Lonnquist
Van der Heijde, P.K.M.
Van der Heijde,	P.K.M.
5030
4911
6312
5870
6220
3433
6703
6570
3880
6604
3982
5024
8030
6130
6280
2610
8570
2611
322
6020
6024
C-21B
C -197
C- 316
C-287
C- 303
C-96
C-342
C- 328
C-122
C-332
C-135
C-215
C - 377
C-301
C-310
C-53
C- 391
C - 54
C-12
C- 293
C-295
A-15

-------
MODEL NAME
AUTHORS
IGWMC
KEY
PAGE
PLUME 2D
PLUME3D
PM/PMDIS
PMODSL
POLLUT
POLLUTE
PORFLO
PORFLOW - II (2D)
PORFLOW/PORFLO-3
PORFRSEZE
PORSTAT/PORMC
POSSM/MCPOSSM (PCB
On-Site Spill Model)
PREDIS
PRE PRO 3 F LO/PREMOD
PRINCE (Princeton
Analytical Models)
PROSPER.
PROTOCOL (PROgram TO
correlate Leaching
data)
PRZM-2 (Pesticide Root
Zone Model)
PRZMAL
PT (Pressure -
-Temperature Code)
PTC (Princeton
Transport Code)
Wagner, J., S.A. Watts, and
D.C. Kent
Wagner, J., S.A. Watts, and
D.C, Kent
Chiang, W-H., and W.
Kinzelbach
Selim, H.M.
Rowe, R.K., and J.R. Booker
Runchal, A.K., B. Sagar,
R.G. Baca, and N.W. Kline
Runchal, A.K.
Run cha1, A¦K»
Run cha1, A«K•
Sagar, B. and P.M. Clifton
Andersen, P.F.
Cleary, R. and M. Ungs
Pickrell, G., and D.D.
Jackson
Carsel, R.F., C.N. Smith,
L.A. Mulkey, L.A., and
J.D. Dean
Wagner, J., and
C.Ruiz-Calzada
Bodvarsson, G.S., and
C.H. Lai
Babu, D.K., G.F. Pinder,
A. Niemi, and D.P.
Ahlfield
5312
5311
8550
291
5175
5250
3790
3233
3238
3235
3237
5780
6840
7030
8100
Goldstein, R.A., J.3. Mankin, 3360
and R.J. Luxmoore
4860
4720
5310
3890
515
C-250
C-249
C-390
C-10
C- 229
C-24S
C-108
C-79
C- 82
C - 80
C-81
C-279
C- 349
C-3S0
C-378
C-84
C-189
C-177
C-249
C -124
C -14
A-16

-------
MODEL NAME
AUTHORS
IGWMC
KEY
PAGE
PTDPS I
pipjjpg jj
PTDPS III
FTMODEL
PULSE
PUMP
PUMPING TEST PACKAGE
PUMPING TEST PROGRAM
PUMPTEST
QUICKFLOW
RADFLOW
RADFLOW
RADIAL '
RAND3D
RANDOM WALK/TRANS
RAQSIM (Regional
AQuifer SIMulation)
REDEQL-EPA
REDEQL-UMD
RESSQ
RETC (Retention Curve
Computer Code)
RISKPRO
RITZ (Regulatory and
Investigative
Treatment Zone model)
ROAM {Remediation
Options Assessment Model)
Blair, A.W.
Blair, A.W.
Blair, A.W.
Hall, P.
Slotta, L.S.
Ulrick, J.
Hall, P.
Beljin, M.S.
Rumbaugh, III, J.O.
Reilly, T.E.
Rushton, K.R., S.C. Redshaw,
K.S, Radshod
Koch, D.H.
Koch, D.H, and T.A. Prickett
Prickett, T.A., T.G. Naymik,
and C.G. Lonnquist
Cady, R.E., and J.M.
Peckenpaugh
Ingle, S.E., M.D. Schuldt,
and D.W. Schults
Karriss, D.K., S.E.
Ingle, D.K. Taylor, and
V.R. Magnuson
Javandel, I., C. Doughty,
and C.F. Tsang
Van Genuchten, M. T'h. ,
F.J. Leij, and S.R. Yates
Nofziger, D.L., J.R.
Williams, and T.E. Short
5060
5061
5062
5100
5210
5080
5190
5070
6382
5300
5550
6064
6305
2691
2690
4640
4870
4871
3940
6228
7950
6620
7060
C-221
C-222
C-222
C-225
C-242
C-223
C-241
C-223
C-324
C-248
C-263
C-297
C-314
C-60
C - 59
C-168
C-190
C-191
C-126
C- 307
C-374
C- 333
C-363
A-17

-------
MODEL NAME
AUTHORS
KEY
PAGE
ROSE
RT
RUSTIC
RWH (RWHC/RWHE/RWHV)
RZWQM (Root Zone Water
Quality Model)
SAFTAP (SAturated Flow
and Transport And
Particle tracking)
SAFTMOD
SALINA
Saltwater Encroachment
SANDWICH
SANGRE
SATEM (Selected
Aquifer Test
Evaluation Methods)
SATRA-CHEM
SATURN
SCHAFF
SEARCH
SEAWTR/SEACONF
SEEP(VM)-3D
SEEP/W (PC-SEEP)
SEEP2(VM)-2D
SEEP2D
Lerner, D.N.	6900
Javandel, I., C. Doughty,	6313
and C.F. Tsang
Dean, J.D., P.S. Huyakorn,	4721
A.S. Donigian, K.A. Voos,
et al.
van der Heijde, P.K.M.	6011
DeCoursey, D.G., K.W. Rojas, 5850
and L.R. Ahuja
Huyakorn, P.S., and T.N.	5822
Blandford
Huyakorn, P.S.,	and 4694
J.E. Buckley
7191
Yapa, P.N.N.D.	3210
Huyakorn, P.S.,	et al. 5530
Anderson, C.A.	4600
Boonstra, J.	2801
Lewis F.M., C.I. Voss, and	3831
J. Rubin
Huyakorn, P.S., S.D.	583
Thomas, J.W. Mercer, and
B.H. Lester
Sorey, M.L., and M.J.	160
Lippmann
Durbin, T.J.	3960
Allayla, R.I.	3640
Desai, C.S.	3863
Krahn, J., D.G. Fredlund,	4980
L. Lam, and S.L. Barbour
Desai, C.S.	3862
Tracy, F.T.	3810
C-354
e-317
C-178
C- 292
C- 286
C-283
C -174
C-370
C-77
C-262
C-163
C- 65
C-113
C-16
C - 8
C-130
C-104
C-119
C-208
e-118
C-110
A-18

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MODEL NAME
AUTHORS
KEY
PAGE
SEEPAGE
SEEPV
.SEFTRAN
SENECA
SESOIL (Seasonal Soil
Compartment Model)
SGMP
SHAFT79 {Simultaneous
Heat And Fluid
Transport)
SHALT
SHARP
SIMEQ
SIMGRO
Site Analyzer
SiteGIS
SitePlanner
SLAEM, SLAEMS, MLAEM
SLW, SLWL
SLAM (Steady Layered
Aquifer Model)
SLAPMAN
SLUGT
SOHYP
SOIL
SOIL PHYSICS
S0ILC02
SOILINER
Moore, J.S., S.G.	5990
Carpenter •
Davis, L.A.	2890
Huyakorn, P.S., D.S. Ward,	588
J.O. Rumbaugh, and R.W. Broome
Ma, Y.H., and C.W. Shipman	4990
Bonazountas, M., and J.	5039
Wagner (recent version:
D. Hetrick)
Boonstra, J., and N.A. De	2800
Ridder
Pruess, K., and R.C.	2580
Schroeder
Pickens, J.F., and G.E, Grisak 2034
Essaid, H.I.
Querner, E.P.
Srinivasan, P,
Strack, O.D.L.
Aral, M.M.
Steen, A., and R. Southworth
Mills, A.
Van Genuchten, M.Th.
El-Kadi, A.I.
Campbell, G.S.
Simunek, J., and D.L. Suarez
Johnson, R.A., E.S. Wood,
R.J. Wood, and J. Wozrriak
5750
Schulz, H.D., and E.J. Reardon 3760
5010
8450
8470
8000
1791
4900
6750
8170
6226
6330
5760
7010
5260
C-291
C- 68
C-18
C-209
C- 219
C- 64
C- 51
C-45
C-277
C-107
C-213
C-385
C- 385
C-375
C ¦ 3 8
C-195
C- 345
C-381
C-306
C- 318
C-278
C-359
C-246
A-19

-------
MODEL NAME
AUTHORS
KEY
PAGE
SOILPROP
SOLMINEQ.B8
SOLMNEQ/SOLMNEQF
SOLMNQ
SOLUTE
SOMOF
SOTRAN
SPILLCAD
SPILLTRANS
SPILLVOL
SRT
SSIK3D
STAFAN/STAFANT
STAFF2D (Solute
Transport And Fracture
Flow in 2 Dimensions)
STF (Soil Transport
and Fate Data Base)
STFLO
STLINE
STR1 (MODFLOW
Streamflow Routing
Package)
Stream Function and
Hydraulic Head Models
STREAMLINE
STRESEEF-2D
Mishra, S., J.C. Parker,	5183
and N. Singhal
Kharaka, Y.K., W.D. Gunter,	4882
P.K. Aggarwal, E.H. Perkins,
et al.
Kharaka, Y.K., and I. Barnes	4880
Goodwin, B.W., and M. Munday	4881
Beljin, M.S.	6380
Wesseling, J.W.	2983
Nwaogazie, I.L.	4320
Parker, J.C. et al.	5189
Parker, J.C. et al.	8190
Parker, J.C. , and	5181
R.J. Lenhard
Burden, D.S., and D.L.	7180
Shackleford
Trescott, P.C., S.P.	772
Larson, and D.B. Sapik
Huyakorn, P.S.	584
Huyakorn, P.S.	4710
Sims, R.C., J.L. Sims,	5680
and S.G. Hansen
Faust, C.R., T. Chan,	694
B,S. Ramada, and B.M.
Thompson
5600
Prudic, D.E.	3986
Ar.and, S.C., and A. Pandit	3920
5176
Desai, C.S.	3864
C-234
e-193
C-191
C-192
C-323
C- 74
C-151
C-240
C-381
C-231
€-368
C- 33
C -17
C-176
C-271
C-22
C-266
C-139
C-125
C-230
C-119
A- 20

-------
model name
AUTHORS
KEY	PAGE
STROP/STROPZ2
SUGARWAT
SUMATRA-1
SUMMERS
SUTRA
SWANFLOW
SWATR-CROPR/SWACROP
SWENT (Simulator for
Water, Energy and
Nuclide Transport)
SWICHA
SWIFT
SWIFT (Salt Water
Interface by Finite
element Technique)
SWIFT III, SWIFT/3 86,
SWIFT/4 86
SWIGS2D
SWIM
SWIM (Salt Water
Intrusion Model)
SWMS-2D
SWSOR
TARGET -2DH
TARGET- 2DM
6780
Holditch, S.A.	4490
van Genuehten, M.Th.	6224
van der Heijde, P.K.M,	5620
Voss, C.I.	3830
Faust, C.R., and J.D.	4650
Rumbaugh
Wesseling, J.G., P. Rabat,	2550
B.J. van den Broek,
and R.A. Feddes
Lantz, R.B., S.B. Pahwa,	697
and B.S. RamaRao
C- 347
C-156
C- 305
C-267
C-lll
C-169
C- 50
C-24
Huyakorn, P.S., P.P.
Andersen, J.W. Mercer,
and H.O. White Jr.
4631
C-166
Dillon, R.T., R.M.
Cranwell, R.B. Lantz, and
S.B. Pahwa
3840
C -115
Verruijt, A., and J.B.S.
Gan
1852
C-43
Ward, D.S.
3842
C-115
Contractor, D.N.
3600
6880
C-101
C-352
Sa da Costa, A.A.G., and	2631	C-57
J.L. Wilson
Simunek, J., T. Vogel,	6221	C-304
and M.Th. van Genuchten
Mercer, J.W., S.P. Larson	2140	C-50
and C.R. Faust
Moreno, J.L., M.I.	4930	C-201
Asgian, S.D. Lympany,
P-J. Pralong, et al.
Moreno, J.L., Asgian,	4932	C-203
M. I., Lympany, S.D.,
Pralong, P-J. et al.
A-21

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MODEL NAME
AUTHORS
IGWMC
KEY
PAGE
TARGET-2DU
TARGET-3DS
TARGET-3DU
TDAST
TDFDlO
{Two-Dimen s i onal
Finite Difference 1st
Order sorption)
TDPLUME/TWODPLME
TECMOUND
TECTYPE
TECWVEL
TENS0R2D
TERZAGI
TETRA
TGUESS
THCVFIT
THE IS
THEIS2
THEISFIT
THWELLS
TIMELAG
TOFEM N
TOUGH/TOUGH2
Moreno, J.L., Asgian,
M. I., Lympar.y, S.D.,
Pralong, p-J, et al.
Moreno, J.L., Asgian,
M.I., Lympany, S.D.,
Pralong, P-J. et al.
Moreno, J.L., Asgian,
M.I., Lympany, S.D.,
Pralong, P-J. et al.
Javandel, I., C. Doughty,
and C.F. Tsang
Slotta, L.S.
Slotta, L.S,
Maslia, M.L., and R.B.
Randolph
Karasimhan, T.N.
Abriola, L.M., and G.F.
Pinder
Bradbury, K.R. and E.R.
Rothchild
van der Heijde, P.K.M.
Spinks, M.P.
Koch, D.H,
McElwee, C.D.
van der Heijde, P.K.M.
Thompson, D.B.
Olathoorn, T.N.
Pruess, K., Y.W. Tsang, and
J.S.Y. Wang
4931
4933
4934
6311
5213
5212
6871
6870
6872
6730
121
6430
6450
6025
5171
6300
6080
6022
6580
1814
2582
C-202
C-203
C-204
C- 315
C-244
C-244
C-351
C-351
C-352
C- 345
C-6
C-326
C - 327
C-296
C-229
C-311
C-297
C-293
C- 328
C-41
C-52
A - 2 2

-------
MODEL NAME
AUTHORS
IGWMC
KEY
PAGE
TRACR3D
TRAFRAP
TRANS2D
TRANS3D
TRIPM
TRIWACO/TRACE
TRUST
TSSLEAK
Two-Dimensional Finite
Element Galerkin Model
Two-dimensional
multi-compound vapor
transport model
TWODAN
ULAM (Unsteady Layered
Aquifer Model}
UNSAT, UNSAKY
UNSAT-H
UNSATID
UNSAT2
USGS FRONT-TRACKING
USGS- 2D - FLOW
USGS- 2D-TRANSPORT/MOC/
KONBRED
USGS-3D-FLOW
Travis, B.J.	4270
Huyakorn, P.S., H.O.	589
White, Jr., V.K. Guvanasen,
and B.H. Lester
Durbin, T.J.	7101
Durbin, T.J.	5561
Gureghian, A.B.	4081
7190
Narasimhan, T.N.	120
Cobb, P.M., C.D. McSlwee,	6081
and M.A. Butt
Tracy, J.V., and E.J.	3881
Wexler
Benson, D.A., D. Huntley	6930
and P.C. Johnson
Fitts, C.R.	6850
Aral, M.M.	4901
Khaleel, R., and T-C.J. Yeh	6400
Fayer, M.J., G.W. Gee,	4340
and T.L. Jones
Gupta, S.K., C.S. Simmons,	2071
F.W. Bond, and C.R. Cole
Neuman, S.P.	21
Garabedian, S.P., and	741
L.F. Konikow
Trescott, P.C., G.F. Pinder,	771
and S.P. Larson
Konikow, L.F., and J.D.	740
Bredehoeft
Trescott, P.C., S.P. Larson,	770
and L.J. Torak
C-149
C-19
C-365
C-265
C-144
C- 369
C-4
C-298
C-123
C- 355
C- 349
C -196
C- 326
C-152
C-47
C-l
C-28
C- 32
C-26
C-30
USGS-SOL
Wexler, B.J.
7020
C- 360
A- 23

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MODEL NAME
AUTHORS
IGWMC
KEY
PAGE
USOCON
Herraiz, A.S., A.S. Gonzalez,
J.A. Alvarez, and M.V. Sanchez
3820
C-lll
V-TOUGH
Buscheck, T.A., and J,J. Nitao
7090
C- 363
VADOFT
Huyakorn, P. S., T.D. Wadsworth,
H.O. White Jr., and
J.E. Buckley
4693
C-174
VADSAT
Parker, J.C.
5188
C- 239
VALOR
Abriola, L.
6702
C- 341
VAM2D (Variably-
saturated Analysis
Model in 2 Dimensions)
Huyakorn, P.S.
4690
C-172
VAM3D (Variably
saturated Analysis
Model in 3 Dimensions)
Huyakorn, P.S.
4691
C-173
Variable Density Model
Kuiper, L.K.
2663
C - 58
VARQ
Butt, M.A., and C,D. McElwee
6082
C-299
VCHFLD
Reeves, M.
690
C-21
VENTING
Kemblowski, M.W., J.L. Zhu,
and J.C. Parker
5182
C- 232
VERA
Van Duyn, C.J.
3180
C- 76
VERTPAK-1
Lester, B., P.S. Huyakorn
D.S. Ward
6950
C - 357
VIP (Vadose zone
Interactive Processes
model)
Stevens, D.K., W.J. Grenney,
and Z. Yan
5681
C-272
VIRALT
Park, N-S., T.N. Blandford,
and P.S. Huyakorn
3944
C-128
VLEACH (Vadose Zone
LEACKing Model)
Turin, J., F. Carlsson,
M. Sukop and P. Lawson
5690
C-273
VS2D/VS2DT
Lappala, E.G., R.W. Healy,
and E.P. Weeks
4570
C-160
WALT0N3 5
Walton, W.C.
6350
C- 319
WASTE/NUTRAN
Ross, B., and C.M. Koplik
2810
C-66
WATBAL
—
7211
C- 371
WATEQ2/WATEQ4 F
Ball, J.W., E.A, Jenne,
and D.K. Nordstrom
4890
C-194
A-24

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MODEL NAME
AUTHORS
KEY
PAGE
WATEQ3
WATEQF
WATERFLO
WELFUN/WELLFLO/CONMIG
WELL
WELLFRAC
WF
WFLO/TFLO
WhAEM
WHIP (Well Hydraulics
Interpretation Program)
WHPA (Well Head
Protection Area
delineation model)
Ball, J.W., E.A. Jenne,	4891
and M.w. Cantrall
Pluitimer, L.N,, B.F. Jones,	3620
and A.H, Truesdel1
Nofziger, D.L.	6630
Walton, W.C.	6351
Gelhar, L.W.	6250
Runchal, A.K.	7690
Young, S.C., and R.B. Clapp	6790
Noy, D.J,	6800
Strack, O.D.L., and H.M,	1792
Haitj ema
5090
Blandford, T.N., and P.S.	3943
Huyakorn
C-195
C-102
C-334
C - 320
C-309
C-373
C-347
C- 348
C-39
C- 224
C-127
ZONEBUDGET
Harbaugh, A.W.
3989
C-141
A-25

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Intentionally Blank Page

-------
Appendix A-2. Cross-reference table for ground-water modeling software
sorted by IGWMC key
MODEL NAME
AUTHORS
IGWMC
KEY
PAGE
UNSAT2
FLUMPS
COMPAQ
CCC
TRUST
TERZAGI
FLUMP
SCHAFF
NON-LINEAR FE/FD
REGRESSION GROUNDWATER
FLOW MODEL
DELTA
NITROSIM
NMODEL/WASTEN
PMODEL
PLASM
GAFETTA
AQUIFEM
PTC (Princeton
Transport Code)
FTRANS (fracture Flow,
Thermal and
RAdioNuclide Solute
transport)
Neuman, S.P.	21
Neuman, S.P., C, Preller,	25
and T.N. Narasimhan
Helm, D.C.	80
Lippmann, M.J., T.N.	100
Narasimhan, D.C. Mangold,
G.S. Bodvarsson.
Narasimhan, T.N.	120
Narasimhan, T.N.	121
Narasimhan, T.N., and	122
S.P. Neuman
Sorey, M.L., and M.J.	160
Lippmann
Cooley, R.L., and R.L. Naff	195
Morel-Seytoux, H.J., C.	260
Rodriquez, and C. Daly
Rao, P.S.C.	280
Selim, H.M., J.M. Davidson,	290
and I.K. Iskander
Selim, H.M.	291
Prickett, T.A., and C.G.	322
Lonnqui s t
Pinder, G.F., P.E. Kinnmark,	513
and C.I. Voss
Pinder, G.F., and C.I. Voss	514
Babu, D.K., G.F. Pinder,	515
A. Niemi, and D.P. Ahlfield
Huyakorn, P.S., et al.	581
C-l
C-2
C-3
C-3
C-4 •
C-6
C-l
C-8
C-8
C-9
C-10
C-10
c-ll
C-12
C-13
C-13
C-14
C-15
A- 27
Preceding page blank

-------
MODEL NAME
AUTHORS
KEY
PAGE
GREASE
SATURN
STAFAN/STAFANT
SEFTRAN
TRAFRAP
HOTWTR
GWSTM-II
VCHFLD
ST FLO
NETFLO (Network Flow)
BORHOL
SWENT {Simulator for
Water, Energy and
Nuclide Transport)
GEOTHER, GEOTHER/VT'4
USGS-2D-TRANS PORT/MOC/
KONBRED
USGS FRONT-TRACKING
MOCDENSE
USGS-3D-FLOW
USGS-2D-FLOW
SSIM3D
MMT-1D
Huyakorn, P.S., et al.	582
Huyakorn, P.S., S.D. Thomas,	583
J.W. Mercer, and B.H. Lester
Huyakorn, P.S,	584
Huyakorn, P.S,, D.S. Ward,	588
J.O. Rumbaugh, and R.W. Broome
Huyakorn, P.S., H.O.	White, 589
Jr., V.M. Guvanasen,	and
B.H. Lester
Reed, J.l.	612
Knowles, T.R.	680
Reeves, M.	690
Faust, C.R., T. Chan,	694
B.S. Ramada, and B.M. Thompson
Pahwa, S.B., and B.S.	695
Rama Rao
Rickertsen, h.D., C.J.	696
Noronha, and M. Reeves
Lantz, R.B., S.B. Pahwa,	697
and B.S. RamaRao
Faust, C.R., and J.W. Mercer	730
Konikow, L.F., and J.D.	740
Bredehoeft
Garabedian, S.P., and	741
L.F. Konikow
Sanford, W.E., and L.F.
Konikow
Trescott, P.C., S.P. Larson,
and L.J. Torak
742
770
Trescott, P.C., G.F. Pinder,	771
and S.P. Larson
Trescott, P.C., S.P. Larson,	772
and D.B. Sapik
Kaszeta, F.E., C.S. Simmons,	781
and C.R. Cole
C-15
C-16
C-17
C -18
C-19
C-20
C-21
C-21
C-22
C-23
C-24
C-24
C-25
C-26
C-28
C-29
C-30
C - 32
C- 33
C-34
A-28

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MODEL NAME
AUTHORS
IGWMC
KEY
PAGE
IDPNGM
GGWP (Golder
Groundwater Computer
Package)
FLO
AQU" 1
MUST (Model for
Unsaturated flow above
a Shallow water Table)
SLAEM, SLAEMS, MLAEM,
SLW, SLWL
WhAEM
GFLOW
TOFEM-N
FLOP, FLOP-LIESTE,
FLOP-El, FLOP-ZN
FRONT
SWIFT (Salt Water
Interface by Finite
element Technique)
DRAINMOD
FRACT
SHALT
FRACSOL
CFEST (Coupled, Fluid,
Energy and Solute
Transport)
UNSATID
FE3DGW
Guvanasen, V,	951
Miller, I., and J.	1010
Marlon-Lambert
Vandenberg, A.	1092
Rushton, K.R.,	and L.M. 1230
Tomlinson
DeLaat, P.J.M.	1771
Strack, O.D.L.	1791
Strack, O.D.L., and H.M.	1792
Haitjema
Haitjema, H.M.	1793
Olsthoorn, T.N.	1814
van den Akker, C., R. Lieste, 1820
and E.J.M. Veling
van den Akker, C.	1822
Verruijt, A., and J.3.S. Gan 1852
Skaggs, R.W.	1950
Pickens, J.F.	2032
Pickens, J.F., and G.E.	2034
Grisak
Grisak, G.E., and J.F.
Pickens
2037
Gupta, S.K., C.T. Kincaid,	2070
P.R. Meyer, and C.R. Cole
Gupta, S.K., C.S. Simmons,	2071
F.W. Bond, and C.R. Cole
*
Gupta, S.K., C.R. Cole, and 2072
F.W. Bond
C-34
C-35
C-36
C - 37
C-37
C- 38
C- 39
C-40
C-41
C - 41
C-42
C- 43
C-43
C-44
C-45
C-45
C-46
C-47
C - 4 8
A-29

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MODEL NAME
AUTHORS
IGWMC
KEY
PAGE
GETOUT
SWSOR
SWATR-CROPR/SWACROP
SHAFT?9 (Simultaneous
Heat And Fluid
Transport)
TOUGH/TOUGH2
PHREBQE
PHRQPITZ
MARIAH
AQUIFEM-1/AQUIFEM-N
SWIM (Salt Water
Intrusion Model)
FLOWQ3D/TRIAG
Variable Density Model
RANDOM WALK/TRANS
RAND3D
INTERFACE
NMFD-3D
MOSHRM
CHARGR
CONFLOW
CRREL (Flow Lines
Program)
Burkholder, H.C., M.O.	2080
Cloninger, W.V. Dernier,
P.J. Lidell, and G. ilansen
Mercer, J.W., S.P. Larson	2140
and C.R. Faust
Wesseling, J.G., P. Kabat,	2550
B.J. van den Broek, and
R.A. Feddes
Pruess, K., and R.C. Scliroeder 2580
Pruess, K., Y.W. Tsang, and	2582
J.S.Y. Wang
Parkhurst, D.L., D.C.	2610
Thorstenson, and L.N. Plummer
Plummer, L.N., D.L. Parkhurst,	2611
G.W. Fleming, and S.A. Dunkle
Gartling, D.K., and C.E.	2620
Hickox
Townley, L.R,, J.L. Wilson,	2630
and A.A.G. Sa da Costa
Sa da Costa, A.A.G., and	2631
J.L. Wilson
Mailory, M.J., and T.J.Durbin	2640
Kuiper, L.K.	2663
Prickett, T.A. , T.G. Nayrnik,	2690
and C.G. Lonnquist
Koch, D.H, and T.A. Prickett	2691
Page, R.H.	2720
Posson, D.R., G.A, Hearne,	2740
J.V. Tracy, and P.F. Frenzel
Pritchett, J.W.	2760
Pritehett, J.W.	2761
Heri.el, E.S. , Jr.	2770
Daly, C.J.	2791
C-49
C-50
C-50
C-51
C-52
C- 53
C -54
C - 55
C-56
C- 57
C-58
C- 58
C-59
C-60
C-61
C- 61
C-62
C-63
C-63
C-64
A- 30

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MODEL NAME
AUTHORS
IGWMC
KEY
PAGE
SGMP
SATEM (Selected
Aquifer Test
Evaluation Methods)
WASTE/NUTRAN
GWTHERM/EP21
DISIFLAQ
GWHEAD
SEEPV
GS2
GS3
MOISTRE/Biological¦
Chemical
MOISTRS
GROMULA (GROundwater
flow in a MUlti-LAyer
system)
GROMAGE
GROWKWA
SOMOF
AQMAN (AQuifer
MANagenr.ent)
GWFLOW/GWMESH/GWPLOT
HVRLV 1
VERA
Saltwater Encroachment
GEOFLOW
Boonstra, J., and N.A. De
Ridder
Boonstra, J.
Ross, B., and C.M. Koplik
Runchal, A., J, Treger,
and G. Segol
Berney, 0,
Beckmeyer, R.R. , R.W.Root,
and K.R.Routt
Davis, L.A,
Segol, G., G.F. Pinder,
and E.O. Frind
Segol, G., G.F. Pinder,
and E.O. Frind
Dutt, G.R., M.J. Shaffer,
W.J, Moore
Warrick, A.W.,
A. Amoozegar-Fard,
Broks, A.P.M., D. Dijkstra,
and J.W. Wesseling
Gilding, B.H., and J.W.
Wesseling
Wesseling, J.W.
Wesseling, J.W.
Gorelick, S.M., and L.J.
Lefkoff
Warner, J.W., and D.D. Walker
Weyer, K.U., and '
W.C. Horwood-Brown
Van Duyn, C.J.
Yapa, P.N.N.D.
Haji-Djafari, S., and
T.C, Wells
2800
2801
2810
2830
2870
2880
2890
2891
2892
2960
2961
2980
2981
2982
2983
3092
3101
3150
3180
3210
3220
C- 64
C-65
C-66
C-66
C- 67
C-68
C-68
C-69
C - 70
C-71
C - 72
C-72
C-73
C- 73
C- 74
C - 75
C-75
C-76
C-76
C-77
C-77
A-31

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MODEL NAME
AUTHORS
IC-WMC
KEY	PAGE
AQUIFER
DEWATER
PORFLOW - II (2D)
FLOTRA
PORFREEZE
porstat/ pormc
PORFLOW/PORFLO- 3
GM5 (Groundwater Model 5)
FEMSAT
PROSPER
FEMWATER/FECWATER
FEMWASTE/FECWASTE
AQUIFLOW
FEWA (Finite Element
model of Water flow
through Aquifers)
FRACPORT
MATTUM
FEMA (Finite Element
model of Material
transport through
Aquifers)
3DFEMWATER
AQUITRAN
3 DFEMWASTE/3DLEWASTE
GRDFLX
BALANCE
NFLUX/SALTFLO
Sagar, B.	3230	C-78
Sagar, B.	3231	C-78
Runchal, A.K.	3233	C-79
Sagar, B.	3235	C-80
Runchal, A.K.	3236	C-80
Sagar, B. and P.M. Clifton	3237	C-81
Runchal, A.K.	3238	C-82
Liggett, J.A.	3240	C-83
Van Bakel, P.J.T.	3350	C-83
Goldstein, R.A., J.B. Mankin,	3360	C-84
and R.J. Luxmoore
Yeh, G.T., and D.S. Ward	3370	C-84
Yeh, G.T., and D.S. Ward	3371	C-86
Yeh, G.T., and C.W. Francis	3372	C-86
Yeh, G.T., and D.D. Huff	3373	C-87
De Angelis, D.L., G.T. Yeh,	3374	C-87
and D.D. Huff
Yeh, G.T., and R.J, Luxmoore	3375	C-88
Yeh, G.T., and D.D. Huff	3376	C-89
Yeh, G.T.	3377	C-89
Yeh, G.T., and C.W. Francis	3378	C-90
Yeh, G.T., and V.S. Tripathi	3379	C-91
Codell, R.B., K.T. Key,	3380	C-92
and G. Whelan
Parkhurst, D.L., L.N. Plummer, 3400	C-92
and D.C. Thorstenson
Wagenet, R.J., W.R. Tillotson,	3410	C-93
C.W. Robbins, and R.J, Hanks
A- 32

-------
MODEL NAME
AUTHORS
IGWMC
KEY
PAGE
LEACHM
CXTFIT
ONESTEP
CREAMS
GLEAMS
IIHR Model
INFIL
KAN SASHE AT
SWIGS2D
CHEMTRN/THCC
WATEQF
NETPATH
SEAWTR/SEACONF
Cyclic Storage of
Fresh Water in Saline
Aquifers
INFSEAL
M3
SIMEQ
FEMSAT
PORFLO
CHAINT
SEEP2D
USOCON
Wagenet, R.J., and J.L. Hutson 3411
Parker, J.C., and M. Van	3432
Genuchten
Kool, J.B., J.C. Parker,	3433
and M.Th. Van Genuchten
Knisel, W.G.	3540
Leonard, R.A., W.G.	3541
Knisel, and P.M. Davis
Jain, S.C.	3550
Vauclin, M.; A.I. El-Kadi	3570
(IGWMC version)
Willhite, G.P., and J. Wagner 3580
Contractor, D.N.	3600
Miller, C.W., L.V. Benson,	3610
and C.L. Carnahan
P1ummer, L.N., 3.F. Jones,	3620
and A.H. Truesdell
Plummer, L.N., E.C.Prestemon,	3621
and D.L.Parkhurst
Allayla, R.I.	3640
Kimbler, O.K.	3650
Moore, I.D.	3690
van Veen, J.A.	3730
Schulz, H.D., and E.J. Reardon	3760
Maslia, M.L.	3770
Runchal, A.K., B. Sagar,	3790
R.G. Baca, and N.W. Kline
Kline, N.W., R.L. England,	3791
and R.C. Baca
Tracy, F.T.	3810
Herraiz, A.S., A.S. Gonzalez,	3820
J.A. Alvarez, and M.V. Sanchez
C -94
C-95
C-96
C- 97
C- 98
C- 99
C-99
C-100
C-101
C-102
C-102
C-103
C-104
C-105
C-106
C-106
C-107
C-108
C-108
C-109
C-110
e-iii
A-33

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MODEL NAME
AUTHORS
IGWMC
KEY	PAGE
SUTRA
Voss, C.I.
3830
C-lll
SATRA-CHEM
Lewis F.M., C.I. Voss, and
J. Rubin
3831
C-113
AQUIFEM-SALT
Voss, C.I.
3832
C-114
SWIFT
Dillon, R.T., R.M. Cranwell,
R.B. Lantz, and S.B. Pahwa
3840
C -115
SWIFT III, SWIFT/386,
SWIFT/486
Ward, D.S.
3842
C-115
2D-STES Model
Reffstrup, J.
3850
C-117
DFT/C-1D
Desai, C.S.
3860
C-117
FIELD-2D
Desai, C.S.
3861
C-118
SEEP2(VM)-2D
Desai, C.S.
3862
C-118
SEEP(VM)-3D
Desai, C.S.
3863
C-119
STRESEEP-2D
Desai, C.S.
3864'
C-119
CONS2 - ID
Desai-, C.S.
3865
C-120
CONSP (L/'NL) - 2D
Desai, C.S.
3866
C-120
CONSA(L)-2D
Desai, C.S.
3867
C-121
MAST-2D
Desai, C.S.
3868
C-121
GWMD3 - Appropriation
Model
Jorgensen, D.G., H. Grubb,
C.H. Baker Jr., and
G.E. Hilir.es
3870
C -122
PARAMETER-ESTIMATION
PROGRAM
Tracy, J.V.
3880
C -122
Two-Dimensional Finite
Element Galerlcin Model
Tracy, J.V., and E.J. Wexler
3881
C-123
Gaierkir. Finite
Element Solute
Transport Model
Tracy, J.V.
3882
C-124
PT (Pressure -
Temperature Code)
Bodvarsson, G.S., and
C.H. Lax
3890
C-124
Stream Function and
Hydraulic Head Models
Anand, S.C., and A. Pandit
3920
C-125
RESSQ
Javandel, I., C. Doughty,
3940
C -126
and C.F, Tsang
A-34

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MODEL NAME
AUTHORS
KEY
PAGE
WHPA (Well Head
Protection Area
delineation model
VIRALT
CANVAS
INVERS
SEARCH
MODFLOW
MODINV - MODFLOW
Parameter Optimization
PATH3D
MODMAN (MODflow
MANagement)
MODPATH
MODFLOW - INTERSED
STORAGE PACKAGE
STRl (MODFLOW
Streair.f low Routing
Package)
MODFLOWP
MOD 3 DFD /KODL-MAKR
ZONEBUDGET
DSC (Discrete
Compartment Model)
Injection Model
Fresh Water Lens
GWUSER/CONJUN
TRIPM
LAYFLO
FRACFLO
Blandford, T.N., and P.S.	3943
Huyakorn
Park, N-S., T.N. Blandford,	3944
and P.S. Huyakorn
Park, N-S., T.N. Blandford,	3945
Y-S. Wu and P.S. Huyakorn
Elderhorst, W.I.M.	3950
Durbin, T.J.	3960
McDonald, M.G., and A.W.	3980
Harbaugh
Doherty, J., R.E, Volker,	3981
and R.G. Pearson
Zheng, C.	3982
Greenwald, R.M.	3983
Pollock, D.W.	3984
Leake, S.A., and D.E. Prudic	3985
Prudic, D.E.
Hill, M.C.
Spinks, M.P.
Harbaugh, A.W.
3986
3987
3988
3989
Campana, M.E., and E.S. Simpson	3990
Laux, S.J., and B.A. Benedict	4011
Ayers, J.F., and H.L. Vacher	4020
Kolterman, C.R.	4070
Gureghian, A.B.	4081
Gureghian, A.B., and G. Jansen	4082
Gureghian, A.B.	4083
C-127
C -128
C-128
C-130
C-130
C-131
C-134
C -135
C-136
C-137
C -138
C-139
C-139
C-140
C-141
C-142
C-142
C-143
C-143
C-144
C-145
C-145
A- 35

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MODEL NAME
AUTHORS
IGWMC
KEY
PAGE
MODFE/FEMOD
Torak, L., and R.L. Cooley
4100
C-146
MLSOIL/DFSOIL
Sjoreen, A.L., D.C. Kocher,
G.G. Killough, C.W. Miller,
et al.
4140
C-147
FD/FE Darcy Velocities
Batu, V.
4150
C-148
2D SAT/UNSAT FLOW
Blandford, G.E.
4170
C-148
ID Unsaturated Flow
Jensen, K,H.
4180
C-149
TRACR3D
Travis, B.J.
4270
C-149
cadil/agtehm
Emerson, C.J., B. Thomas,
R.J. Luxmoore, and D.M, Hetrick
4290
C-150
SOTRAN
Nwaogazie, I.L.
4320
C -151
UNSAT-H
Fayer, M.J., G.W. Gee,
and T.L. Jones
4340
C -152
FEMTRAN
Martinez, M.J.
4350
C-152
IONMIG
Russo, A.J.
4360
C-153
INFGR
Craig, P.M., and E.G. Davis
4380
C-154
HSSWDS
Perrier, E.R., and A.C. Gibson
4410
C-155
GWMAN
Wanakule, N., N.W.Mays,
and L.S. Lasdon
4480
C-155
SUGARWAT
Holditch, S.A.
4490
C-156
FEM301
Kiraly, L.
4500
C -157
FREESURF
Hufschmied, P.
4510
C-157
maqwf
Contractor, D.N., S.M.A.
El Didy and A,S. Ansary
4530
C-158
MAQWQ
Contractor, D.N., S.M.A.
El Didy and A.S. Ansary
4531
C-158
DOSTOMAN
King, C.M., E.L. Wilhite,
R.w. Root, Jr., D.J. Fauth,
et al.
4540
C-159
MOTIF (Model of
Transport in
Fractured/Porous Media)
Guvanasen, V.
4550
C-160
VS2D/VS2DT
Lappala, E.G., R.W. Healy,
and E.P. Weeks
4570
C-160
A- 36

-------
MODEL NAME
AUTHORS
IGWMC
KEY
PAGE
MAGNUM-2D
MAGNUM-3D
SANGRE
HST3D
MASCOT
FLAMINGO
SWICHA
FRACFLOW
RAQSIM (Regional
AQuifer SIMulation)
SWANFLOW
FLOSA {FLOw Systems
Analysis)
DREAM
MODRET
VAM2D {Variably
saturated Analysis
Model in 2 Dimensions)
VAM3D (Variably
saturated Analysis
Model in 3 Dimensions)
VADOFT
SAFTMOD
DSTRAM
(Dens i ty-dependent
Subsurface TRansport
Analysis Model)
England, R.L., N.W.
Kline, K.J. Ekblad, and
R.G. Baca
Estey, S.A., R.C. Arnett,
and D.R. Aichele
Anderson, C.A.
Kipp, Jr., K.L.
Gureghian, A.B.
Huyakorn, P.S.
Huyakorn, P.S., P.F.
Andersen, J.W. Mercer,
and H.O. White Jr.
Cady, R.E., and J.M.
Peckenpaugh.
Faust, C.R., and J.O.
Rumbaugh
Zijl, W., and M. Nawalany
Huyakorn, P.S.
Huyakorn, P.S.,
T.D. Wadsworth, H.O. White
Jr., and J.E. Buckley
Huyakorn, P.S.
J.E. Buckley
Huyakorn, P.S.
and
4590
4591
4600
4610
4620
4630
4631
4632
4640
4650
4660
Bonn, B.A., and S.A. Rounds 4670
4680
Huyakorn, P.S.	4690
4691
4693
4694
4700
C-162
C-162
C-163
C -164
C ¦ 165
C-166
C-166
C-168
C-168
C-169
C-170
C-171
C-171
C-172
C-173
C-174
C-174
C-175
A-37

-------
MODEL NAME
AUTHORS
KEY
PAGE
STAFF2D (Solute
Transport And Fracture
Flow in 2 Dimensions)
PRZM-2 (Pesticide Root
Zone Model)
RUSTIC
GW-UN/DTCD
AQ-AP
AQ-AT
AQ-AS
AQ-FEM
AQ-EF
HELP (Hydrologic
Evaluation of Landfill
Performance)
EQ3/EQ6
EQUILIB
GEOCHEM
MINEQL2
MINTEQ/MINTEQ2
MINTEQA2
PROTOCOL (PROgram TO
correlate Leaching
data)
REDEQL-EPA
REDEQL-UMD
Huyakorn, P.S..	4710
4720
4721
4730
4750
4751
4752
4753
4754
4800
Wolery, T.J,	4810
Morrey, J.R., and D.W, Shannon 4820
Sposito, G., and S.V. Mattigod 4830
Westall, J.C., Z.L. Zachary, 4840
and F.M.M Morel
Felmy, A.R., D.C. Girvin,	4850
and E.A. Jenne
Allison, J.D., D.S. Brown	4852
and K.J. Novo-Gradac
Pickrell, G., and D.D.	4860
Jackson
Carsel, R.F., C.N. Smith,
L.A. Mulkey, L.A., and
J.D. Dean
Dean, J.D., P.S. Huyakorn,
A.S. Donigian, K.A. Voos, et al,
Karanjac, J., and D,
Braticevic
Kovar, K., and A. Leijnse
Kovar, K., and A. Leijnse
Kovar, K., and A. Leijnse
Leijnse, A., and K. Kovar
Leijnse, A., and K. Kovar
Schroeder, P.R., J.M. Morgan,
T.M. Walski, and A.C. Gibson
Ingle, S.S., M.D. Schuldt,	4870
and D.W. Schults
Harriss, D.K., S.E. Ingle,	4871
D.K. Taylor, and V.l. Magr.uson
C-176
C-177
C-178
C-179
C-180
C-181
C-181
C-182
C-182
C-183
C-185
C-185
C-186
C-187
e-187
C-188
C-189
C-190
C-191
SOLMNEQ/SOLMNEQF
Kharaka, Y.K., and I. Barnes
4880
C-191
A- 38

-------
MODEL NAME
AUTHORS
KEY
PAGE
SOLMNQ
SOLMINEQ, 8B
WATSQ2/WATEQ4 F
WATEQ3
SLAK. {Steady Layered
Aquifer Model)
ULAM (Unsteady Layered
Aquifer Model)
BIOPLUME II
OASIS
FLQWPATH
FLOWCAD
FLONET
AIRFLOW
TARGET-2DH
TARGET-2DU
TARGET-2DM
TARGET-3DS
TARGET-3DU
DYNFLOW
Goodwin, B.W., and M, Munday 4881
Kharaka, Y.K., W.D. Gunter,	4882
P.K, Aggarwal, E.H, Perkins,
et al.
Ball, J.W., E.A. Jenne,	4890
and D.K. Nordstrom
Ball, J. W. , E.A. Jenne,	4 S91
and M.W. Cantrall
Aral, M.M.	4900
Aral, M.M.	4901
Rifai, H.S., P.B. Bedient,	4910
R.C. Bordon, and J.F. Haasbeek
Newell, C.J., J.F. Haasbeek, 4911
J.P. Hopkins, S.E. Alder-
Sckaller, et al.
Franz, T., and N. Guiguer	4920
Franz, T.	4921
Franz, T.	4922
Franz, T., and N. Guiguer	4923
Moreno, J.L., M.I. Asgian,	4930
S.D. Lympany, P-J. Pralong,
et al.
Moreno, J.L., M.I. Asgian,	4931
S.D. Lympany, P-J. Pralong,
et.al.
Moreno, J.L., M.I. Asgian,	4932
S.D. Lympany, P-J. Pralong,
et al.
Moreno, J.L., M.I. Asgian,	4933
S.D. Lympany, P-J. Pralong,
et al.
Moreno, J.L., M.I. Asgian,	4934
S.D. Lympany, P-J. Pralong,
et al.
Riordan, P.J., R.P. Schreiber, 4940
and B.M. Harley
C-192
C-193
C-194
C-195
C-195
C-196
C-196
C-197
C-198
C -199
€-200
C - 2 01
C - 201
C- 202
C - 203
C-203
C-204
C-204
A- 39

-------
MODEL NAME
AUTHORS
KEY
PAGE
DYNTRACK
DRASTIC
MT3D (Modular
Transport in 3
Dimensions)
SEEP/W {PC-SEEP)
SENECA
MICROFEM
FLOWNET
MATE (Microcomputer
Aquifer Test
Evaluation)
MFLOP (FLOw Pattern)
SIMGRO
AQUA
FASTEP/WELLCOST
3D Finite Element Dual
Porosity Flow and
Transport Model
PATHRAE
NEFTRAN/NEFTRAN-S
GTC (Group Transfer
Concentration)
NUSEEP
FOWL (FOssil fuel
combustion Waste
Leaching)
Riordan, P.J., D.J. Schroeder, 4941
and B.M. Harley
Aller, L., T, Bennett,	4950
J.H. Lehr, R.J. Petty, etal.
Zheng, C.	4970
Krahn, J., D.G. Fredlund,	4980
L. Lam, and S.L. Barbour
Ma, Y.H., and C.W. Shipman	4990
Hemker, c.j., and H. van	5000
Elburg
Van Elburg, H., C.J. Hemker, 5001
and G.B. Engelen
Hemker, C.J.	5002
Hemker, C.J.	5 004
Querner, E.P.	5010
Kjaran, S.P., D. Egilson,	5018
and s.Th. Sigurdson
Ulrick, J.	5020
Glover, K.C.	5022
Fjeld, R.A., A.W. Elzerman,	5024
T.J. Overcamp, N. Giannopoulos,
et al.
Campbell, J.E., C.D. Leigh,
D.E. Longsine, E.J. Bonano,
and C.P. Harlan
Yu, C., W.A. Jester, and
A.R. Jarrett
Hostetler, C.J., R.L.
Erikson, and M.L. Kemner
5025
5028
5030
5033
C-206
C-206
C-207
C-208
C-209
C-210
C-211
C-212
C-212
C-213
C - 214
C-214
C-215
C-215
C-216
C-217
C-218
C-218
A- 40

-------
MODEL NAME
AUTHORS
KEY
PAGE
SESOIL (Seasonal Soil
Compartment Model)
GWAP (Graphical Well
Analysis Package)
PTDPS I
PTDPS II
PTDPS III
PUMPING TEST PROGRAM
PUMP
WHIP (Well Hydraulics
Interpretation Program)
PTMODEL
FEMSEEP
FINITE
GLOVER
HYDRO PAL
INTERSAT
1NTERTRAKS
THE IS
POLLUT
STREAMLINE
MO FAT
SPILLVOL
VENTING
SOILPROP
ARMOS (Areal
Multiphase Organic
Simulator)
Bonazountas, M., and J.
Wagner (recent version:
D. Hetrick)
Dansby, D.A.
Blair, A.W.
Blair, A.W.
Blair, A.W,
Hall, P.
Ulrick, J.
Hall, P.
Meiri, D.
Spinks, M.P.
Voorhees, M.
Voorhees, M.
Spinks, M.P.
Kaluarachchi, J.J, and
J.C. Parker
Parker, J.C., and
R.J.Lenhard
Kemblowski, M.W.,
J.L. Zhu, and J.C. Parker
Mishra, S., J.C. Parker,
and N. Singhal
Kaluarachchi, J.J., J.C.
Parker, J.L. Zhu, and
A.K. Katyal
5039
5040
5060
5061
5062
5070
5080
5090
5100
5120
5130
5140
5150
5160
5161
5171
5175
5176
5180
5181
5182
5183
5184
C-219
C-221
C-221
C -222
C- 222
C - 223
C-223
C-224
C-225
C- 225
C-226
C-226
C-227
C-228
C-228
C-229
C-229
C-230
C-230
C-231
C-232
C-234
C-235
A ¦ 41

-------
MODEL NAME
AUTHORS
KEY
PAGE
MOTRANS
NITRO
FLOFIT
VADSAT
SPILLCAD
PUMPING TEST PACKAGE
FLOWNS
PULSE
CXPMPM
TDPLUME/TWODPLME
TDFDIO
(Two-Dimens i ona1
Finite Difference 1st
Order sorption)
GRID BUILDER
POLLUTE
SOILINER
MADPD (Matched
Artificial
Dispersivity -
Principal Direction
method)
MINSFLO
QUICKFLOW
PRZMAL
PLUME3D
PLUM12D
CANSAZ (EPACMS)
Katyal, A.K., and J.C.Parker
Kaluarachchi, J. J. , and
J.C. Parker
Kool, J.B., S. Mishra,
and J.C. Parker
Parker, J.C.
Parker, J.C.
Eramlett, W.
R.C.Borden
Slotta,	L.S.
Slotta,	L.S.
Slotta,	L.S.
Slotta,	L.S.
and
Rowe, R.K., and J.R. Booker
Johnson, R.A., E.S. Wood,
R.J. Wood, and J. Wozmak
Syriopoulou, D., and
A.D. Koussis
Aljoe, W.A., and J.W. Hawkins
Rumbaugh, III, J.O.
Wagner, J., and
C.Ruiz-Calzada
Wagner, J., S.A. Watts, and
D.C.	Kent
Wagner, J., S.A. Watts, and
D.C, Kent
Sudicky, E.A., J.B. Kool,
and P.S. Kuyakorn
5185
5186
5187
5188
5189
5190
5200
5210
5211
5212
5213
5249
5250
5260
5270
5290
5300
5310
5311
5312
5330
C-236
C-238
C-238
C- 239
C- 240
C- 241
C-242
C-242
C - 243
C- 244
C-244
C-245
C-246
C-246
C-247
C - 247
C-248
C-249
C-249
C-250
C-251
A-42

-------
MODEL NAME
AUTHORS
IGWMC
KEY	PAGE
EPACML
EPACMTP
(FECT'JZ/ CAN SAZ-3D)
CTRAN/W (Contaminant
Transport)
CHEQMATE
CSUGAS
CSUPAW {Colorado State
University Pit And
Well)
CSDFDM (Colorado State
University Finite
Difference Model)
Groundwater Discharge
Tests: Simulation and
Analysis
MODMOC- 3D
NOR IA
BI03.D
GEOTRACK
IGSM (Integrated
Groundwater and
Surface Water Model)
FTWORK
SANDWICH
FRESAL
RADFLOW
FLOW3D
Saleem, Z.A. , A.M. Salhotra,
D, Marder, J.Kool, B, Lester,
and M. Ungs
Saleem, Z.A., P.S. Huyakorn,
J. Kool, A, Salhotra,
P. Mineart, E.A. Sudicky
Haworth, A., S.M. Sharland,
P.W. Tasker, and C.J. Tweed
5331
5332
5340
5350
Sabadell, G.P., J.J. Eisenbeis, 5390
and B.K. Sunada
Sunada, D.K.
5391
C-251
C-252
C-253
C-254
C - 254
C- 255
Close, B., J.W. Warner,
G. Sunada, and D.K. Sunada
'5392
C - 255
Clarke, D.
5460
C-256
Williams, P.	5470
Bixler, N.E.	5480
Srinivasan, P., and J.W.	5500
Mercer
Srinivasan, P.	5501
Yoon, Y.S., and M.N. Saquib	5510
C - 257
C-258
C-258
C- 259
C-260
Faust, C.R., P.N. Sims,
C.P. Spalding, and P.F.
Andersen
Huyakorn, P.S., et al.
Kovar, K.
Reilly, T.E.
Durbin, T.J., and
C. Berenbroeck
5520
5530
5540
5550
5560
C-261
C-262
C-263
C-263
C-264
A-43

-------
MODEL NAME
AUTHORS
KEY
PAGE
TRANS3D
FLSTAT
STLIKE
SUMMERS
MULTIMED
FLASH
FLAME
INTERCHANGE
STF {Soil Transport
and Fate Data Base)
VIP (Vadose zone
Interactive Processes
model)
VLEACH {Vadose Zone
LEACKing Model)
HPS
AQMODEL
JDB2D/3D
AQUAMOD
DEL-V
MASS
SHARP
SOIL PHYSICS
POS SM/MCPOS SM (PCB
On-Site Spill Model)
MAF (Multiple Aquifer
Flow)
Durbin, T.J.	5561
Lieste, R., E.J.M. Veling,	5570
and C. Van den Akker
5600
van der Heijde, P.K.M.	5520
Salhotra, A.M., P. Mineart,	5630
S. Sharp-Hansen,
and T. Allison
Baca, R.G., and S.O. Magnuson	5660
Baca, R.G., and S.O. Magnuson	5661
Glover, K.C.	5670
Sims, R.C., J.L. Sims,	5680
and S.G. Hansen
Stevens, D.K., W.J. Grenney,	5681
Z. Yan
Turin, J., F. Carlsson,	5690
M. Sukop and P. Lawson
Galya, D.P.	5700
O'Neill, G.T.	5710
Bredehoeft, J.D.	5720
van Tonder, G., and H.J.	5730
van Rensburg
van Tonder, G., and H.J,	5731
van Rensburg
van Tonder, G., and H.J.	5732
van Rensburg
Essaid, H.I.	5750
Campbell, G.S.	5760
5780
Roelse, A., K. Maas	5790
C-265
C-265
C-266
C-267
C- 268
C - 269
C - 269
C-270
C - 271
C-272
C-273
C-273
C-274
C-275
C-275
C - 276
C-277
C-277
C-278
C-279
C-280
A-44

-------
MODEL NAME
AUTHORS
IGWMC
KEY
PAGE
FE model for 2D Steady-
State Flow in Confined
Aquifer
MAGNAS
MAGICS
SAFTA? (SAturated Flow
and Transport And
Particle tracking)
FASTCHEM
RZWQM (Root Zone Water
Quality Model)
OILEQUIL
HEADCO
2D-SEEP
MIGST3M-3D
HYPERVENTILATE
DEEP PERCOLATION MODEL
ESTIM
SEEPAGE
RWH (RWHC/RWHE/RWHV)
PLUME
THWELLS
GWFLOW
PLUME2D
THCVFIT
AQ/BASIC GWF
RADFLOW
THEISFIT
TSSLEAK
Kuniansky, E.L.	5810
Huyakorn, P.S., and J. Kool	5820
Huyakorn, P.S.	5821
Huyakorn, P.S., and T.N.	5822
Blandford
Kincaid, C.T.	5840
DeCoursey, D.G., K.W.	5850
Rojas, and L.R. Ahuja
5870
Spane, Jr., F.A., and	5880
R.B. Mercer
Kimura, H.	5890
Ohnuki, T,	5891
Johnson, P.C.	5940
Bauer, H.H., and J.J. Vaccaro	5960
Hills, R.G.	5970
Moore, J.S., S.G. Carpenter	5990
van der Heijde, P.K.M.	6011
Van der Heijde, P.K.M.	6020
van der Heijde, P.K.M.	6022
van der Heijde, P.K.M.	6023
Van der Heijde, P.K.M.	6024
van der Heijde, P.K.M.	6025
Verruijt, A.	6030
Rushton, K.R., S.C. Redshaw,	6064
and K.S. Rathod
McElwee, C.D.	6080
Cobb, P.M., C.D. McElwee,	6081
and M.A. Butt
C-280
C-281
C-282
C- 283
C- 284
C-286
C-287
C-287
C-288
C- 289
C-289
C-290
C-291
C-291
C-292
C - 293
C-293
C-294
C-295
C- 296
C-296
C-297
C-297
C-298
A-45

-------
MODEL NAME
AUTHORS
IGWMC
KEY
PAGE
VARQ
GROUND
AT123D
PESTAN/PESTRAN
PP
ONE-D
SWMS-2D
SUMATRA-1
CHAIN
SOHYP
CFITIM
RETC (Retention Curve
CoxnjDuter CocLe }
HYDRUS/WORM
WELL
Ground-wate r Rechar ge
PESTRUN
DXSPER
THEIS2
LEAKY
FINITE-Mine Hydrology
FRACQUAL
RADIAL
LTIRD
Butt, M.A., and C.D. McElwee 6082
Codell, R.B., K.T. Key,	6100
and G. Whelan
Yeh, G.T., et al.	6120
Enfield, C.G., R.F. Carsel,	6130
S.Z. Cohen, T. Phan, et al.
Su, C., and R-H. Brooks	6170
van Genuchten, M. Th,,	6220
and W.J, Alves
Simunek, J., T. Vogel,	6221
and M.Th. van Genuchten
van Genuchten, M.Th.	6224
Van Ger.uchten, M.Th.	6225
Van Genuchten, M.Th.	6226
van Genuchten, M.Th.	6227
Van Genuchten, M.Th.,	6228
F.J. Lexj, and S.R. Yates
Kool, J.B., and M.Th. van	6229
Genuchten
Gelhar, L.W.	6250
Sunada, D.K., J.w. Warner,	6260
and D.J. Molden
McCall,Jr., B.C., and	6280
D.D. Lane
Maloszewski, P.	6290
Koch, D.H.	6300
Koch, D.H.	6301
Koch, D.H.	6302
Koch, D.H.	6304
Koch, D.H.	6305
Javandel, I., C. Doughty,	6310
and C.F. Tsang
C-299
C- 300
C- 300
C-301
C-302
C - 303
C-304
C- 305
C-305
C-306
C-306
C-307
C-308
C- 309
C-310
C-310
C - 311
C * 311
C-312
C-312
C- 313
C-314
C - 314
A-46

-------
MODEL NAME
AUTHORS
IGWMC
KEY
PAGE
TDAST
ODAST
RT
INFIL1D
SOIL
COVAR
WALTON3 5
welfun/wellflo/conmig
GWPT
GWFL3D
GWTR3D
SOLUTE
PUMPTEST
HWELL
MOUSE
UKSAT, UNSAKY
TETRA
TGUESS
OPTP/PTEST
TIMELAG
BEAVERSOFT
CATTI
EPA-VHS
ASM (Aquifer
Simulation Model)
Javandel, I., C. Doughty,	6311
and C.F. Tsang
Javandel, I., C. Doughty,	6312
and c.F. Tsang
Javandel, I., C. Doughty,	6313
and C.F. Tsang
Simmons, C.S., and T.J. McReon 6320
El-Kadi, A.I,	6330
Williams, S.A., and A.I.	6334
El-Kadi
Walton, W.C.	6350
Walton, W.C.	6351
Walton, W.C.	6352
Walton, W.C.	6353
Walton, W.C.	6354
Beljin, M.S.	6380
Beljin, M.S.	6382
Beljin, M.S.	6383
Pacenka, S., and T. Steenhuis	6390
Khaleel, R., and T-C.J. Yeh	6400
Abriola, L.M., and G.F. Pinder 6430
Bradbury, K.R, and E.R.	6450
Rothchild
Paudyal, G.N., and A. Das	6570
Gupta
Thompson, D.B.	6580
Bear, J., and A. Verruijt	6590
Sauty, J.P., and w.	6600
Kinzelbach
Van der Heijde, P.K.M.	6601
Kinzelbach, W., and R. Rausch	6603
C-315
C- 316
C-317
C- 317
C- 318
C-319
C-319
C-320
C- 321
C- 321
C-322
C- 323
C - 324
C- 325
C - 325
C - 326
C - 326
C- 327
C-328
C- 328
C- 329
C- 330
C-330
C- 331
A- 47

-------
MODEL NAME
AUTHORS
IGWMC
KEY
PAGE
PAT
AIR
RITZ (Regulatory and
Investigative
Treatment 2one model)
WATERFLO
CHEMRANK
GWPATH
CRACK
AQTESOLV
AQUIX-4S
MODELCAD {Computer-
Aided Design for
Ground-Water Modeling)
MYGRT
CHROMAT
VALOR
OPTIC
CMIS (Chemical
Movement in Soil)
CMLS (Chemical
Movement in Layered
Soils)
CHEMFLO
TENS0R2D
SLAPMAN
Computer Simulation
Model of Soil Water
Movement and Plant
Uptake
Kinzelbach, W., and R. Rausch
Lin, C., and W. Kinzelbach
Nofziger, D.L., J.R.
Williams, and T.E. Short
Nofziger, D.L.
Nofziger, D.L., P.S.C.
Rao, and A.G. Hornsby
Shafer, J.M.
Sudicky, E.A,
Duffield, G.M.
Gilmer, T.
Rurabaugh, J.0.
G.M, Duffield
III.
and
Summers, K.V., S.A.
Gherini, M.M. Lang, M.J.
Ungs, and others
Abriola, L.
Nofziger, D.L., and A.G.
Hornsby
Nofziger, D.L., and A.G.
Hornsby
Nofziger, D.L., K. Rajender,
S.K. Nayudu, and P-Y. Su.
Maslia, M.L., and R.B.
Randolph
Steen, A., and R. Southworth
Hayhoe, H.N., and R. De Jong
6604
6605
6620
6630
6640
6650
6660
6670
6680
6690
6700
6701
6702
6703
6710
6711
6712
6730
6750
6760
C-332
C-333
C- 333
C-334
C - 335
C- 336
C - 336
C-337
C- 338
C-339
C-339
C-340
C - 341
C - 342
C- 342
C-343
C - 344
C- 345
C-345
C-346
A-48

-------
MODEL NAME
AUTHORS
IGWMC
KEY	PAGE
STROP/STROPZ2
WF
WFLO/TFIiO
PREDIS
TWODAN
FLOWTHRU
TECTYPE
TECMOUND
TECWVEL
SWIM
MAP
ROSE
GWT
GAS 3D
Two-dimensional
raulti- compound vapor
transport model
CAPZOME
VERTPAK-1
GEOPACK
GEO-EAS
S0ILC02
USGS-SOL
PREPR03FL0/PREMOD
Graphic Groundwater
MOSES
ROAM (Remediation
Options Assessment Model)
V-TOUGH
6780	C-347
Young, S.C., and R.B. Clapp 6790	C-347
Noy, D.J.	6800	C-348
6840	C-349
Fitts, C.R.	6850	C-349
6860	C-350
6870	C-351
6871	C-351
6872	C-352
6880	C- 352
Einberger, C.M,	6890	C-353
Lerner, D.N.	6900	C-354
6910	C-354
Sepehr, M., and Z.A.	6920	C-355
Samani
Benson, D.A., D. Huntley	6930	C-355
and P. C. Johnson
Bair, E.S., A.E. Springer	6940	C-356
and G.S. Roadcap
6950	C-357
Yates, S.R., and M.v. Yates	6980	C-358
Englund. E., and A. Sparks	6990	C-359
Simunek, J., and D.L. Suarez 7010	C-359
Wexler, E.J.	7020	C-360
Andersen, P.F.	7030	C-360
Esling, S.P.	7031	C-361
7050	C- 362
7060	C-363
Buscheck, T.A., and J.J. Nitao 7090	C-363
A - 4 9

-------
MODEL NAME
AUTHORS
IGWMC
KEY
PAGE
FL0W2D
TRANS 2D
FEGW3
2D-FED
2D-DIFF
GSAS
GRITS/STAT
SRT
TRIWACO/TRACE
SALINA
MIKE SHE
WATBAL
E4CHEM (including
EXSOL}
CTRAN/W SEEP/W
WELLFRAC
RISKPRO
GIS\Key
S 2. tePlanner
DIVAST
HPP-GMS
PCTRANS
MANAGES
PRINCE (Princeton
Analytical Models)
Durbin, T.J.
Durbin, T.J.
Yoon, Y.S.
Sherif, M.M., V.P. Singh,
and A.M. Amer.
Silka, L.R.
Loftis, J., and H. Horsey-
Burden, D.S., and D.L.
Shackleford
Abbott, M.B., J.C. Bathurst,
J.A. Cunge, P.E. O'Connell,
and J. Rasmussen
Rohleder, H,, M. Matthies,
R. Bruggemann, B. Munzer, B.
Schernewski, and S. Trapp
Runchal, A.K.
Stevens, K.
Dillon, P.J.
Blaschke, A.P. and G. Bloschl
Cleary, R. and M. Ungs
7100
7101
7120
7130
7140
7150
7160
7180
7190
7191
7210
7211
7230
7500
7690
7950
7980
8000
8010
8020
8030
8040
8100
C- 364
C- 365
C- 365
C-366
C-367
C -367
C- 368
C - 368
C - 3 69
C- 370
C-370
C-371
C- 372
C-372
C - 373
C- 374
C-374
C- 375
C- 375
C-376
C-377
C-378
C-378
ECLIPSE
8110
C- 379
A-50

-------
MODEL NAME
AUTHORS
IGWMC
KEY
PAGE
FLOTRANS
SLUGT
SPILLTRANS
GEOBASE
AQUAEM (AQUifer
Analytic Element Model;
EIS/GWM
BALANCE
Site Analyzer
SiteGIS
MULAT
ANALYT
1DFEMWATER
HSSM (Hydrocarbon
Spill Screening Model)
NEWSAM/NEWVAR
PM/PMDIS
ABCFEM
PHREEQM-2D
Franz, T.
Mills, A.
Hall, P.
Chen, J., and P. Hall
Wesseling, J.G.
Srinivasan, P.
Verruij t, A.
Kolesov, A.A.
Yeli, G.T,
Weaver, J.W., R.J,
Charbeneau, J.D. Tauxe,
B.K. Lien, and J.B. Provost
Ledoux, E., G. De Marsely,
A. Levassor, S. Sauvagnac,
and A. Rivera
Chiang, W-H, and W, Kinzelbach
Brown, A., and R. Herzman
Willemsen, A.
8130
8170
8190
8360
8370
8400
8440
8450
8470
8500
8510
8520
8530
8540
8550
8560
8570
C-380
C-381
C - 381
C- 382
C-383
C - 384
C-384
C-385
C-385
C- 386
C- 387
C-387
C-388
C-389
C-390
C- 390
C-391
A- 51

-------
Appendix B-l.l. Single-phase flow in the saturated zone: analytical models
(software may have multiple functions)
ANALYT					8510
AQ-AP	 4750
AQ-AS 						4752
AQMODEL			5710
AQUAEM			 8370
BEAVERSOFT			6590
CANSAZ (EPACMS) 	 ..... 5330
CAPZONE 	 ..... 6940
CRRSL 				 2791
CSUPAW 	 . 	 ............... 5391
Cyclic storage of Fresh Water in Saline Aquifers 	 	 3650
DREAM							4670
EPACML		 5331
FINITE-Mine Hydrology 	 ..... 6302
FLOP, FLOP -LIEST3, FLOP-Z1, FLOP-ZN			1820
FRONT							1822
GLOVER							5140
Ground-water Recharge . 		 6260
GWFLOW		 				 6023
GWHEAD	 2880
HWELL					6383
HYDRO PAL 		5150
LEAKY		 6301
MAF							 5790
MINEFLO ..... 	 . 5290
PAT			 6604
PTMODEL 	 ........ 5100
QUICKFLOW					 5300
RESSO . 						3940
ROSE	 69 00
SLAEM, SLAEMS, MLAEM, SLW, SLWL			1791
STROP/STROPZ2 		 . 6780
TECMOUND . . . . 						 6871
THE IS 				5171
THE IS 2 				 6300
TWODAN							 6850
THWELLS			6022
VERTPAK-1 					6950
WALTON35 							 6350
WELFUN/WELLFLO/CONMIG ........... 	 6351
WhAEM 						1792
WHPA					 3943
B-l

-------
Appendix B-1.2. Single-phase flow in the saturated zone: numerical models
2D-STES Model 	 ....
3D FINITE ELEMENT DUAL POROSITY FLOW AND TRANSPORT MODEL
ABCFEM 	
AQ-AT . . .
AQ-EF . . .
AQ-FEM . • ,
AQ/BASIC GWF
AQU-1 . . ,
AQUA ....
AQUAMOD ......
AQUIFEM 	
AQUIFEM-1/AQUIFEM-N
AQUIFEM-SALT . . . .
AQUIFER 	
AQUIFLOW 	
ASM	
BEAVERSOFT 	
BORHOL 	
ccc	
CFEST 	
CONFLOW . . .
CONS2-1D . . .
CONSA(L)- 2D .
CONSP(L/NL)-2D
CONTRANS . . .
CSUFDM 	
CTRAN/W, SEEP/W
DSL-V 	
DEWATER . . . .
DFT/C-1D . . . .
DISIFLAQ .
DSTRAM 	
DYNFLOW 	 ;
FE model for 2D Steady State
FE3DGW 	 ......
FEM301 	
FEMSAT 	 .
7low in Confined Aquifer
3850
5022
8560
4751
4754
4753
6030
1230
5018
5730
514
2630
3832
5110
3372
6603
6590
696
100
2070
2770
3865
3867
3866
5111
5392
7500
5731
3231
3860
2870
4700
4940
5810
2072
4500
3350
FEMSEEP 	 . 	 ......... 5120
FEWA
3373
FIELD-2D			 3861
FINITE			 . 5130
B-2

-------
B-1.2. Continued.
FLONET ,
FLOSA .
FLOTRA «
FL0W2D .
FLOW3D .
FLOWCAD
FLOWNET
FLOWNS .
FLOWPATH
FL0KQ3D/TRIAG
FLOWTHRU
FLSTAT ,
FLUMPS .
FREESURF
FTRANS .
FTWORK .
GABHYD .
GAFETTA
GEOFLOW
GEOTRACK
GFLOW .
GGWP . .
GM5 . .
GREAS E .
GROMAGE
GROMULA
GW-UN/DTCD
GWFL3D .
GWFLOW/GWM
GWMD3
GWPATH .
GWSIM-II
IDPNGM .
INTERCHANG
INTERSAT
JDB2D/3D
MAGNUM-2D
MAGNUM-3D
MAQWF .
MARIAH .
MAST-2D
MFLOP .
MICROFEM
ESH
GWP
OT
B-3

-------
3-1.2. Continued.
KMT - ID	781
MOD3DFD/MODLMAKR 						3988
MODFE/FEMOD					4100
MODFLOW							 3980
MODFLOW - INTERBED STORAGE PACKAGE 	 . 	 3985
MULAT			8500
NEFTRAN/NEFTRAN-S 	 . 	 ....... 	 5025
NETFLO			695
NEWSAM/NSWVAR		 8540
NMFD-3D					 2740
NUSEEP			 5030
PATH 3D 							 . 3982
PLASM			322
PORFLO	3790
PORFLOW - II (2D) 					 3233
PORFREEZE					 3236
PTC 				515
RADFLOW					 6064
RADIAL	 6305
RADIAL FINITE DIFFERENCE MODEL 	 ... 5132
RAQSIM							4640
SAFTAP			 5822
SAFTMOD		 . 4694
SANDWICH			 5530
SEEP(VMS - 3D 				3863
SEEP2 (VM! - 2D						 . 3862
SEEP2D					3810
SEFTRAN ..... 	 .... 588
SGMP		 2800
SLAM				 . 4900
SOTRAN			 4320
STAFAN/STAFANT 	 ............... 584
STAFF2D					4710
STFLO				 		694
STLIKS 	 	 ............. 5600
Stream Function and Hydraulic Head Models			 3920
STREAMLINE			5176
STRESEEP-2D 				 3864
TARGET-2DH				 . 4930
TARGET-2DM	4932
TARGET-3DS ...... 	 ..... 	 4933
TECWVEL					6872
TENSOR2D			 6730
B-4

-------
B-1.2. Continued.
TETRA 			 			6430
TOFEM-N					1814
TRAFRAP ..... 		589
TRIPM				4081
TRIWACQ/TRACE 	 ....................	7190
Two-Dimensional Finite Element Galerkin Model .............	3881
ULAM . . . ¦	•				4901
USGS FRONT-TRACKING 	 .......... 		741
USGS - 2D - FLOW			771
USGS-3D-FLOW .............. 		770
VCHFLD	690
VERA	3180
WELLFRAC				7690
WFLO/TFLO 	 .....	6800
ZONEBUDGET 						3989
Appendix B-2. Single-phase flow in the unsaturated zone: analytical and numerical models
1DFEMWATER 				 8520
2D SAT/UNSAT FLOW					4170
2D-SEEP 	 ....... 5890
3DFEMWATER 				 3377
BALANCE ......... 	 . 	 8440
CADIL/AGTEHM 	 ..... 4290
CANVAS					 3945
CHEMFLO			6712
Computer Simulation Model of Soil Water Movement and Plant Uptake . . .6760
CREAMS 	 .................3540
CTRAN/W 			 5340
DRAINMOD ..... 	 ......... 	 1950
EIS/GWM					 8400
EPACMTP (FECTUZ/CANSAZ- 3D) 		 5332
FEMSAT . 					 3770
FEMTRAN			4350
FEMWATER/FECWATER 	 ......... 3370
FLAMINCO 	 ..... 	 ..... 4630
FLASH							5660
FLO			1092
FLOTRA							 3235
B-5

-------
B-2 . Coxitxzii2©d¦
FLUMP 						122
GLEAMS						 3541
GS2 	 2891
GS3 				 2892
HELP					 4800
HSSWDS	4410
HYDRUS/WORM			6229
IIHR Model	3550
INFGR					4380
INFIL 						 3570
INFIL1D 			 		 6320
INF SEAL			 3690
LEACHM							3411
M3 					3730
MAGICS					 5821
MAGNAS 				 5820
MATTUM					 3375
MIGSTEM- 3D					 5891
MODRET			 4680
MOISTRE 						2960
MOISTRS 		 2961
MOTIF 						 4550
MOUSE	'	 6390
MUL7IMED .......... 	 . 	 ..... 5630
MUST 						1771
NORIA	 5480
PORFLOW / PORFLO - 3 				 3238
P RED IS		 				6840
PRZM-2 							 4720
PRZMAL	'			5310
RISKPRO . 				 7950
RUSTIC	 4721
RZWQK						 5850
SATURN		 583
SEEP/W (PC-SEEP)			4980
SEEPV 				2890
SESOIL . 						5039
SIMGRO			5010
SOIL PHYSICS					 5760
SOII.INER 						5260
SOMOF	 2983
SUMATRA-1 ......... 	 ........ 6224
SUTRA					3830
B-6

-------
B-2. Continued.
SWATR-CROPR/SWACROP 	 ...... 	 2550
SWIM					6880
SWMS- 2D					6221
TARGET-2 DU	 4931
TARGET-3DU					 4934
TOUGH / TOUGH2 		 		 2582
TRACR3D			 4270
TRUST			120
UNSAT, UNSAKY			 6400
UNSAT-H			 4340
UNSAT1D			2071
UNSAT2			21
V-TOUGH 				 7090
VADOFT		 				 4693
VADSAT							5188
VAM2D					4690
VAM3D .......... 	 ...... 	 4691
VIP							 5681
VIRALT	 3944
VS2D/VS2DT					 4570
WATERFLO 	 ..... 6630
Appendix B-3. Pathline and capture zone analysis
ABCFEM 	 . 	 ............	8560
AQ-AS				4752
AQ-EF					4754
AQMODEL			5710
AQUAEM				8370
ASM 	 ...... 	 .............	6603
BEAVERSOFT		 					6590
CANVAS					3945
CAPZONE 	 . 	 ..........	6940
CRREL 					2791
DREAM		4670
FE3DGW ..... 	 . . 	 ............	2072
FEMSEEP	'	5120
FLONET					4922
FLOP, FLOP-LIEST3, FLOP-Zl, FLOP-ZN 	 ..... 		1820
B-7

-------
B.3. Continued
FLOTRANS			8130
FLOWCAD 	 ........ 	 4921
FLOWNE'T					 5001
FLOWPATH 		4920
FLOWTHRU 				 6860
FLSTAT 	 ..... 	 ...... 	 5570
FRONT					1822
GEOTRACK 				 5501
GFLOW	1793
GWFATH							 6650
INTERTRANS			5161
MFLOP			 5004
MICRQFBM	 5000
MODPATH 				 3984
PAT			 6604
PM/PMDIS 				 8550
PATH 3D			 3982
QUICKFLOW	 5300
RESSQ		 3940
SLAEM, SLAEMS, MLAEK, SLW, SLWL 	 ........ 6780
STREAMLINE	5176
STROP/STROPZ2 			 6780
TRIWACO/TRACE 	 ..... 	 7190
TWODAN . 				 6850
VIRALT		 		 3944
WhAEM					1792
WHPA			 3943
Appendix B-4.1. Solute transport in the saturated zone: analytical models
AT123D 						6120
BEAVERSOFT				6590
CANSAZ (EPACMS) 		 			5330
CHAIN 							6225
CRACK						6660
CXPMPM	5211
DISPER				 .	6290
EPA-VHS				6601
EPACML				5331
B-8

-------
B-4,1, Continued
ESTIM							5970
FRACQUAL					 6304
FRACSOL								 2037
GETOUT						 2080
GRDFLX			. 3380
GROUND			6100
HPS 			 . 5700
HYDROPAL						 			 5150
LAYFLO . . . 				 4082
LTIRD			6310
MAP		 . 6890
MASCOT			 4620
MYGRT 	 ............ 6700
OASIS					4911
ODAST 		6312
ONS-D	•	 6220
PESTAN/PESTRAN			6130
PLUME							6020
PLUME2D					 6024
PLUMS 2D	.5312
PLUMB 3D					5311
POLLUT 	 ..... 	 ........... 5175
PRINCE ...... 	 ............. 	 8100
PULSE	5210
RESSQ	3940
RITZ			 6620
SOLUTE							6380
STROP/STROPZ2 							6780
TDAST	6311
TDPLUME/TWODPLME			5212
USGS-SOL	 7020
VERTPAK-1 ....................... 	 6950
WALTON3 5 			 6350
WASTE/NUTRAN 				2810
WELFUN/WELLFLO/CONMIG 	 ... 6351
B-9

-------
Appendix B-4.2. Solute transport in the saturated zone: numerical models
3D FINITE ELEMENT DUAL POROSITY FLOW AND TRANSPORT MODEL ........ 5022
3DFEMWASTE/3DLEWASTE 	 3379
ABCFEM					 8560
AQUA			5018
AQUITRAN			 3378
ASM			 6603
BIOID	 5500
BIOPLUME II	4910
BORHOL						 . 696
CFEST 			 				 2070
CHAINT			 3791
CH3MTRN / THCC			3610
CH3QMATE					 5350
CTRAN/W, SEEP/W					 7500
DSTRAM 						 4700
DYKTRACK			 4941
FEMA					 3376
FEMSEEP	5120
FEMWASTE/FECWASTE 				. 3371
FLOTRA 						3435
FLOTRANS . 						8130
FRACFLO	 4083
FRACPORT	3374
FRACT					 2032
FTRANS 	 ...... 	 581
FTWORK 						5520
Galerkin Finite Element Solute Transport Model . 	 . 	 3882
GEOFLOW	.3220
GGWP ......... 	 1010
GREASE			582
GROWKWA				 		 2982
GTC		 5028
GWSIM-II 						680
GWTH3RM/EP21 	2830
GWTR3D 						6354
HST3D			4610
IONMIG	' . . . 4360
MADPD	 5270
MAQWQ			 4531
MASS	 5732
MAST-2D 			 				 3868
MM" - ID				 . 781
B-10

-------
B-4.2. Continued
MOCDSNSE			742
MODMOC - 3D			5470
MOSES				 		 7050
MT3D 				 4970
NBFTRAN/NEFTRAN-S			 5025
PCTRANS						 8030
PHREEQM-2D ..... 	 8570
PORFLO						 . . . 3790
PORFLOW - II (2D) 			3233
PORSTAT / PORMC	3237
PTC			515
RAND3D				 2691
RANDOM WALK/TRANS 	 2690
ROAM	 7060
RWH 				6011
SAFTAP	5822
SAFTMOD			 4694
SANDWICH 				5530
SATRA-CHEM 				 3831
SEFTRAN 			588
SHALT					 2034
SOTRAN			 4320
STAFF2D	4710
SWENT . 		697
SWICHA				 4631
SWIFT					3840
SWIFT II			 3841
SWIFT III, SWIFT/386, SWIFT/486 			 3842
TARGET-2 DH					 4930
TARGET-2DM 	 .......... 	 4932
TARGET-3DS					4933
TRAFRAP . 						589
TRANS2D 	 ..... 	 7101
TRANS 3D							5561
TRIPM							4081
USGS-2D-TRANS PORT/MOC/KONBRED ..................... 740
VCHFLD					690
WFLO/TFLO				 6800
B-11

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Appendix B-5. Models for solute transport in the unsaturated zone
3DFEMWASTE./ 3DLEWASTE			 3379
CADIL/AGTEHM			4290
CHEMFLO 	 ..... 6712
CHROMAT 				.			6701
CMIS			6710
CMLS					6711
CREAMS ....... 	 .......... 	 3540
CTRAN/W			,	 5340
DRAINMOD 		1950
EIS/GWM			8400
EPACMTP (FECTUZ/CANSAZ- 3D)			 5332
FASTCHEM 				 5840
FEMTRAN					4350
FEMWASTE/FECWASTE 	 ....... 3371
FLAME 				.....5661
FLAMINGO	4630
FLOTRA . 				3235
GLEAMS 	 ....... 3541
GS2 					2891
GS3 	 2892
HYDRUS/WORM			 6229
LEACHM	¦			3411
M3 			3730
MAGICS		 . 5821
MAGNAS 	 ....... 5820
MIGSTEM- 3D 				5891
MOISTRE	. 29 60
MOTIF 			 4550
MOUSE			 639 0
MULTIMED			. 5630
NFLUX/SALTFLO 	 3410
NITRO					5186
NITROSIM 					 . 280
NMODEL/WASTEN 		290
PMODEL					291
PORFLOW/FORFLO- 3 					3238
POSSM/MCPOSSM			5780
PREDIS					6840
FRZM-2 				4720
PRZMAL 	 ...... 	 5310
RISXPRO		 						 7950
B-12

-------
B- 5. Continued
RUSTIC			 4721
RZWQM			5850
SATURN			. 583
SESOIIi 						 5039
SOIL PHYSICS 	 ........... 5760
SUMATRA-1 			 6224
SUTRA			 3830
SWMS-2D	 6221
TARGET-2DU		 . 4931
TARGET-3DU 		 4934
TRACR3D 						 4270
VADOFT					4693
V ADS AT			5188
VAM2D 		 4690
VAM3D					 4691
VIP			 5681
VS2D/VS2DT . 						 4570
Appendix B-6. Heat transport models
2D - SEEP			5890
2D-ST1S Model 	 3850
AQUA			5018
BORHOL					696
CCC 				100
CFEST 	 .............. 	 2070
CHARGR	 2761
DFT/C-1D 					 . 3860
DSTRAM	 4700
FIELD-2D				 . 3861
FLASH 	 ..........5660
FLOTRA					3435
FTRANS	581
GAFETTA 				513
GEOTHER, GEOTHER/VT4						 730
GREASE			582
GWTHERM/EP21 						2830
HOTWTR 				612
HST3D	4610
B -13

-------
B.6. Continued
KANSASHEAT					 3580
MAGNUM- 2D			 4590
MAR I AH	 2620
MATTUM 			 3375
MOTIF			4550
MUSHRM 		 2750
NOR IA			 5480
PORFLO 				 3790
PORFLOW - II (2D) 					3233
PORFLOW/PORFLO- 3 				 . 3238
PORFRESZE			3236
PORSTAT/ PORMC			 3237
PT					 3890
SANGRE .............. 	 . 	 4600
SCHAFF			160
SEFTRAN	588
SHAFT79 	 . 	 ........ 2580
SHALT 	 ............ 2034
SOIL PHYSICS			 5760
STAFAN/STAFANT 	 584
SUTRA					 3830
SWENT 				697
SWIFT	 3840
SWIFT II			•		 . 3841
SWIFT III, SWIFT/386, SWIFT/486 	 3842
TDFDIO					5213
TOUGH/TOUGH2 				2582
V-TOUGH							 7090
WALTON3 5 					 6350
Appendix B-7. Models for saltwater intrusion with sharp or diffuse interfaces
2D-FED . 				7130
2D - SEEP				5890
AQUIFEM- SALT						3832
BEAV3RS0FT				6590
CFEST				2070
DSTRAM		4700
FLOTRA						3235
B-14

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B.7. Continued
FRESAL 						 5540
Fresh Water Lens			 4020
FTRANS								 . 581
GREASE 			 				582
HST3B	4610
Injection Model . 						4011
INTERFACE 	 ....... 	 2720
MAST-2D					 3868
MOCDENSE	742
NEWSAM/NEWVAR ........... 	 ............. 8540
PORFLOW - II (2D) 			 3233
SALIKA 				7191
Saltwater Encroachment			3210
SATRA-CHEM			 3 831
SEAWTR/SEACONF				 3640
SHALT				 . 2034
SHARP			 5750
SLAEM 						1791
SUTRA . 					 				3830
SSIM3D			772
SWENT				 . . . 697
SWTCKA		 					 . 4631
SWIFT			1852
SWIFT II 						 3841
SWIFT III, SWIFT/386, SWIFT/486 		 . 3842
SWIGS2D ........... 	 3600
SWIM 				 2631
SWSOR							2140
TARGET-2DU 				 4931
TARGET-3DS	 4933
•TOUGH/TCUGH2		•. . 2582
TRUST					120
Variable Density Model					2663
3-15

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Appendix B-8. Models for multiphase flow and transport
ARMOS 			 . 5184
HSSM			8530
MAGNAS							5820
MOFAT	5180
MOTRANS			5185
OILEQUIL		 5870
PORFLOW/PORFLO-3 					.3238
SPILLCAD . 			 				5189
SPILLTRANS	'	8190
SPILLVOL					5181
SWANFLOW			4650
VALOR 				 6702
Appendix B-9. Models for vapor transport
2D-DIFF					7140
AIR		6605
AIRFLOW		4923
CSUGAS	5390
GAS 3D 									6920
HYPERVENTILATE 		594 0
MAGNAS ..... 		5820
MOFAT	5180
MOTRANS							5185
SOILC02	•	7010
SUGARWAT					4490
TOUGH/TOUGH2 		2582
TRACR3D				4270
Two-dimensional mu11i- compound vapor transport model			6930
V-TOUGH				7090
VENTING			5182
VIP 				5681
VALOR		6702
B -16

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Appendix B-10. Models for virus transport
CANVAS					 3945
VIRALT 	 . 	 .............. 3944
Note: For information on VIROTRANS (IGWMC Key 7170) and VIRTUS (IGWMC Key
8460) contact IGWMC.
Appendix B-ll. Models for fluid flow and rock deformation
BORHOL			696
CCC 				100
CHARGR						2761
CQMPAC							80
COKS2 - ID				3865
CONSA(L) - 2D				3867
CONSP(L/NL)-2D 	 . 	 ........ 		3866
DFT/C-1D				3860
FIELD-2D						3861
FLOTRA				 .	3235
FLUMPS 	 ........ 	 ......... 25
MODFLOW - INTERBED STORAGE PACKAGE 	 ..3985
MOTIF 	 .......... 	 ........	4550
PT		3890
SANGRE ............ 	 ..........	4600
STAFAN/STAFANT			584
STRESEEP-2D 								3864
TERZAGI ..... 		121
TRUST					120
VERTPAK-1 					6950
B- 17

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Appendix B-12.1. Aquifer/slug test analysis software
AQTSSOLV ...... 	 . 	 ........	6670
AQDIX-4S 		•		 .	6680
Groundwater Discharge Tests: Simulation and Analysis 		5460
GW-UN/DTCD					4730
GWAF				5040
GWPT 				6352
HVRLV 1					3150
MATE . 			 			5002
MLU . 					5003
PAPADOP					5051
PTDPS I					5060
PTDPS II		5061
PTDPS III				5062
PUMP . . . 						5080
PUMPING TEST PACKAGE	5190
PUMPING TEST PROGRAM			5070
PUMPTEST 						6382
SATEM 			2801
SLUGT 				8170
TECTYPE					6870
TGUESS 				6450
THCVFIT			6025
THEISFIT				6080
TIMELAG 					6580
TSSLEAK 	 .....	6081
VARQ 	 .............	6082
WHIP					5090
Appendix B-12.2. Inverse numerical models for saturated zone parameters
(sometimes inverse modules are included in other programs, e.g. FTWORK;
IDPNGM					951
INVERS 					3950
MODFLOWP 	 .....	3987
MODINV - MODFLOW Parameter Optimization 	 . 		39 81
NON-LINEAR FE/FD REGRESSION GROUNDWATER FLOW MODEL 	 . 		195
PARAMETER-ESTIMATION PROGRAM ... 	 .......	3880
SEARCH						3960
B-18

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Appendix B-12.3. Programs for determining hydraulic parameters
in the unsaturated zone
FLOFIT .			5187
FP			'	6170
ONESTEP 						 3433
RETC 	 ............... 6228
SOHYP		 			 . 6226
SOIL					 6330
SOILPRQP					5183
Appendix B-12.4. Programs for determining transport parameters
(including tracer test analysis)
CATTI			6600
CFITIM ....... 	 ...................	6227
CXTFIT				3432
ESTIM		 					5970
WELL					6250
Appendix B-13. Programs for Optimization of Flow and Transport Solutions
AQMAK . .'				3092
DELTA 						260
FASTEP/WELLGOST ...... 	 .....	5020
GWMAN . 						4480
GWUSER/COS JUN						 .	4070
MODMAN		 .	3983
OPTIC							6703
OPTP/PTEST						6570
USOCON					3820
B-19

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Appendix B-14. Models for flow and transport in fractured rock
3D FINITE ELEMENT DUAL POROSITY FLOW AND TRANSPORT MODEL 	 5022
AQTESOLV ..... 	 6670
CHAIN? 	 .............. 3791
CRACK 				 6660
FLAME					5661
FLASH 			 		 5660
FRACFLO 	 ...... 	 ........ 4083
FRACFLOW		 . 4632
FRACPORT			 3374
FRACQUAL					..6304
FRACSOL							2037
FRACT		 2032
FTRANS				 581
GREASE						 582
MAGNUM-2D				 4590
MOTIF					4550
NEFTRAN/NEFTRAN-S			 5025
NETFLO 	 ...... 	 695
PORFLOW/PORFLO - 3 							3238
SEFTRAN 	 .......... 588
SHALT		 			 				 2034
STAFAN/STAFANT 	 584
STAFF2D 	 ............... 4710
SWIFT 				 3840
SWIFT II			 3841
SWIFT III, SWIFT/386, SWIFT/486 	 3842
TOUGH/TOUGH2 			2582
TRACR3D 	 ............. 	 4270
TRAFRAP			589
TRUST					120
V - TOUGH					7090
VERTPAK-1 			 6950
B-20

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Appendix B-15. Geocheraical models
BALANCE 					 . 3400
CHEMTRN/THCC 	 ....... 3610
CHEQMATE 	 ....... 5350
CKROMAT	6701
DSC 			3990
E4CHEM	7230
EQ3/EQ6 						4810
EQUILIB		4820
FASTCHEM			5840
FOWL		 			 			5033
GEOCHEM					4830
MINEQL2 					4840
MINTEQ/MINTEQ2 				 .	4850
MINTEQA2 		4 852
NETPATH	3621
PHREEQE 			 						2610
PHREEQM-2D					8570
PHRQPITZ 	 .............	2611
PROTOCOL	4860
REDEQL - EPA . •						4870
REDEQL-UMD . . 					4871
SATRA-CHEM						3831
SENECA	4990
SIMEQ 				3760
SOLMINEQ . 88 	4882
SOLMNEQ/ SOLMNEQF			4880
SOLMNQ		4881
WATEQ2/WATEQ4F ...... 	 . 		4890
WATEQ3 	 ............. 	 .....	4891
WATEQF	3620
B-21

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Appendix B-16. Software for (geo-)statistical analysis and stochastic simulation
AQUAMOD 						 5730
CANSAZ (EPACMS) ..... 	 5330
COVAR					6334
DEL-V	 5731
EAI/GWM	.	 8400
EPACML . 		 5331
EPACMTP					 5332
FRACFLO			 4083
GEO-E AS			 6990
GEOPACK 	 ............. 6980
GRITS/STAT	7160
GSAS	7150
MAP				 6890
MOSES	 7050
NEFTRAN/NEFTRAN-S			 5025
PQRSTAT/ PORMC			 3237
POSSM/MCPQSSM 				 5780
RUSTIC	 4721
SEARCH					 3960
SOIL PHYSICS			 5760
VADSAT	5188
WASTE/NUTRAN 	 .......... 2810
WHPA 		 3943
Appendix B-17. Ground-water related exposure/risk assessment software
DOSTOMAN					4540
E4CHEM						7230
GIS\Key 	 .....	7980
PATERAE				 			5024
POSSM/MCPOSSM 			5780
RISKPRO ¦		7950
SLAPMAN		 			 				6750
B - 22

-------
Appendix C. Detailed description of ground-water modeling software
ordered by IGWMC Key number
XGWMC Key:	21 Mode1 nam©: UNSAT2
Model category: saturated flow, unsaturated flow
Authors: Neuman,	S.P.
Current version:
Release date:	1988
First released:	1974
IGWMC Check-date: 12/92
Institution of Model Development:
Univ. of Arizona, Dept.
and Water Resources
Tucson, AZ 85721
of Hydrology
Code Custodian. Neuman, S« P.
Univ. of Arizona,
Tucson, AZ 85721
Dept. of Hydrology and Water Resources
Model Developed for:
Documentation:
Model Testing:
Peer Review:
research, general use, education
theory, user's guide, examples, program structure,
code listing, verification
verification (analyt. sol.), lab. datasets, field
testing, synth. datasets, code intercomparison
concepts, theory, accuracy, documentation
Avax1abx1xty: restrxcted non-proprxetary, source code, compxled
(PC) version
Computer Requirements: IBM PC/AT (small version), 640 Kb RAM, CGA, math
coprocessor; compiler for larger versions on other
platforms
Abstract:
UNSAT2 is a two-dimensional finite element model for horizontal, vertical,
or axisymmetric simulation of transient flow in a variably saturated,
nonuniform, anisotropic porous medium based on the Richard's equation (not
for steady-state). UNSAT2 is capable of simulating seepage faces,
evaporation, and evapotranspiration from multiple plant species.
Evapotranspiration is simulated through user specified minimum allowed
pressure head at the soil surface, maximum evaporation rate, and soil
surface geometric data. User supplied input for simulation of
evapotranspiration includes root zone geometric data, root effectiveness
function, plant species wilting pressure, and maximum transpiration rate.
Unsaturated hydraulic properties must be input in table form. Darcy flux
terms across elements are discontinuous. UNSAT2 has a restart capability
for' simulating changing boundary conditions.
Remarks:
The codes UNSAT2, BIM2D/3D, TRUST, FEMWATER, TOUGH, SUTRA, SATURN,
TRACR3D, and FLAMINGO are described and compared in: Yeh, T.C., T.C.
Rasmussen and D.D. Evans. 1988. Simulation of Liquid and Vapor Movement
in Unsaturated Fractured Rock at the Apache Leap Tuff Site: Models and
Strategies. NUREG/CR-5 097, U.S. Nuclear Regulatory Commission,
Washington, D.C. This report includes a detailed description of the code
characteristics and evaluates their applicability based on governing
equations and code options.
C-l

-------
A debate on the representation of the seepage surface in OTSAT2 took place
in Water Resources Research? Cooley, R.L. 1983. Some New Procedures for
Numerical Solution of Variably Saturated Flow Problems. Water Resourc.
Res., Vol. 19(5), pp.1271-12B5. Comment by S.P. Neuman, 1985; Water
Resourc. Res., Vol. 21(6), p. 886. and reply by R.L. Cooley. 1985: pp.
887-888.
A brief description of the code appeared in: Thomas, S.D., B. Ross, and
J.W. Mercer. 1982. A Summary of Repository Siting Models.
NUREG/CR-2782, Nuclear Regulatory Commission, Washington, D.C.
Petersen and Wilson (1988; see references) studied the effect of an
unsaturated zone between a stream and the water table on the infiltration
from the stream. Specifically, they simulated the connection or
disconnection between surface water and groundwater caused by a clogging
layer at the bottom of the stream. Five numerical variably saturated flow
models (TRUST, UNSAT2, FEMWATER, T3FEMWATER, and SATURN) were evaluated
with respect to their capabilities in simulating infiltration,
exfiltration, multidimensional unsaturated and saturated seepage, and
groundwater mounding.
IGWMC Key:	25 Model name: FLUMPS
Model category: saturated flow, matrix deformation
Authors: Neuman,	S.P., C. Preller, and T.N. Harasimhan
Current version:
Release date:	1985
First released:	1981	IGWMC Check-date: 10/90
Institution of Model Development: Univ. of California - Berkeley, Dept.
of Civil Eng., Berkeley, CA 94720
Code Custodian: Narasimhan, T.N.
Dniv. of California - Berkeley, Dept. of Materials Sc.
and Mineral Eng., Berkeley, CA 94720
Model Developed for: research, general use
Documentation: code listing
Model Testing:
Peer Review:
Availability:
Computer Requirements: compiler
Abstract:
FLUMPS is a quasi three-dimensional finite element model to simulate
ground water flow and land subsidence due to pumping in a ir.ulti-aquifer
system. The aquifers are connected by one-dimensional vertical finite
element strings. The solution is obtained through an adaptive
explicit-implicit methodology.
Remarks:
FLUMPS is a modification of the program FLUMP to incorporate
one-dimensional vertical consolidation.

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IGWMC Key:	80 Model name: COMPAC
Model category: deformation.
Authors: Helm, D.C.
Current version:
Release date: 1989
First released: 1971	IGWMC Check-date: 12/92
Institution of Model Development: Lawrence Livermore Nat. Lab.
P.O. Box 808, Livermore, CA 94550
Code Custodian: Helm, D.C.
Nevada Bureau of Mines/UNR, Carson City, Nevada
Model Developed for: research, general use
Documentation: theory, test results, examples, user instructions
Model Testing: verj,ficatxon, f xeld da t a s e t s
Peer Review: concepts, theory
Availability: public domain, source code
Computer Requirements: compiler
Abstract:
COMPAC is a one-dimensional model for simulation of time-varying reservoir
compaction (consolidation) and expansion due to changes in effective
stress. The model computes the time distribution of compaction in a
series of aquifers and aquitards using boundary stress values (e.g.,
resulting from hydraulic head), vertical hydraulic conductivity, elastic
and inelastic specific storage (or compressibility) values, layer
thickness, and past-maximum effective stress. Changes in applied stress
can be calculated from measured changes in groundwater levels. The'model
uses a time-centered finite-difference approximation of the governing
equation and uses the Thomas algorithm (a forward and backward
substitution method) to solve the set of equations for the effective
stress at each node.
Remarks :¦
Input for the one-dimensional model includes applied stress changes, which
are computed from water-level changes at upper and lower boundaries.
Initial stress conditions are input as initial water level,
preconsolidation stress, and preconsolidation-stress distribution. The
model allows for a weighted thickness of sediments.
IGWMC Key: 100 Model name: CCC
Model category: saturated flow, heat transport, deformation
Authors: Lippmann, M.J., T.N. Narasimhan, D.C. Mangold, G.S. Bodvarsson.
Current version:
Release date: 19 85
First released: 1976	IGWMC Check-date: 09/90
Institution of Model Development: Lawrence Berkeley Lab., Earth Sc. Div.
Univ. of California, Berkeley, CA 94720
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Code Custodian: Narasimhan, T.N.
Univ. of California - Berkeley, Dept. of Materials Sc.
and Mineral Eng., Berkeley, CA 94720
Model Developed for;
Documentation;
Model Testing:
Peer Review:
Availability:
Computer Requirements:
research, general use
theory, user's guide, code listing
verification
concepts, theory
public domain, source code
compiler
Abstract:
CCC is an integrated finite difference model for simulation of coupled fluid
flow and heat transport in fractured and/or porous media under confined
conditions. The model calculates steady and transient temperature and
pressure distributions, and vertical compaction in multi-dimensional,
heterogeneous, anisotropic systems with complex geometry and a single phase,
non-isothermal liquid. Heat transport processes include convection,
conduction, and thermal dispersion.
Remarks:
PT/CCC is based on the SCHAFF code, developed by M. Sorey of the U.S.
Geological Survey and released in 1976. M. Lippman has developed CCC
Version 1; M, Lippman and G. Bodvarsson developed CCC Version 2 which uses
the Leap -Frogging method. PT/CCC was developed by Gudmundor and
Bodvarsson in 1981. The PT version uses a direct matrix solver instead of
the leap-frogging method.
IGWMC Key: 120 Model name: TRUST
Model category; unsaturated flow, deformation, porous medium, fractures
Authors: Narasimhan, T.N.
Current version:
Release date: IS88
First released: 1975	IGWMC Check-date: 07/92
Institution of Model Development: Lawrence Berkeley Lab., Earth Sc. Div.
Univ. of California, Berkeley, CA 94720
Code Custodian: Narasimhan, T.N.
Univ. of California - Berkeley, Dept. of Materials Sc.
and Mineral Eng., Berkeley, CA 94720
Model Developed for: research, general use, education
Documentation: theory, user's guide, examples, program structure,
verification
Model Testing: verification (analyt. solutions), lab. datasets,
field tests, code intercomparison
Peer Review: concepts, theory, coding, documentation
Availability: public domain, source code; TRUST84 copyrighted by
US DOE
Computer Requirements: compiler
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Abstract:
TRUST is an integrated finite difference simulator for computation of
transient pressure head distributions in multidimensional, heterogeneous,
variably saturated, deformable porous, fractured or dual-porosity media
with complex geometry. TRUST solves an integral form of the governing
equation with terms for compressibility of water, non-elastic
deformability of soil skeleton and desaturability of pores. The PEE
includes pressure-dependent density variations and allows for hysteresis.
Deformation of medium skeleton is based on one-dimensional consolidation
theory. TRUST uses a mixed explicit - implicit approach in solving the
equations; the explicit solution is constrained by a stability criterion,
while the implicit equations are evaluated with a Point-Jacobi type
scheme. The code can handle time-varying Dirichlet, Neumann, and Cauchy
boundary conditions through a general head boundary algorithm, and
provides for sources and sinks.
Remarks:
TRUST is based on the TRUMP code originally developed by A.L. Edwards at
Lawrence Livermore Laboratory, Univ. of Calif, Livernore, Calif.
TRUST-II is an updated version of the TRUST code by Narasimhan (1976)
developed for the U.S. Nuclear Regulatory Commission by Battelle Pacific
Northwest Laboratories (Reisenauer et A1. 1982; see references).
A brief description of the code appeared in: Thomas, S.D., B. Ross, and
J.W. Mercer. 1982. A Summary of Repository Siting Models.
NUREG/CR 2782, Nuclear Regulatory Commission, Washington, D.C.
The codes UNSAT2, BIM2D/3D, TRUST, FEMWATER, TOUGH, SUTRA, SATURN,
TRACR3D, and FLAMINGO are described and compared in: Yeh, T.C., T.C.
Rasmussen and D.D. Evans. 1988. Simulation of Liquid and Vapor Movement
in Unsaturated Fractured Rock at the Apache Leap Tuff Site: Models and
Strategies. NUREG/CR-5097, U.S. Nuclear Regulatory Commission,
Washington, D.C. This report includes a detailed description of the code
characteristics and evaluates their applicability based on governing
equations and code options.
Modifications were made to the code to simulate flow in fractured
unsaturated porous media as discussed in Wang and Narasimhan (1984; see
references). These modifications include additional characteristic curves
and relative permeability curves, van Genuchten formulae for matrix
blocks, gamma distribution formulae for discrete fracture grid blocks,
hyperbolic characteristic curves of Pickens, and a new effective area
factor. This version of TRUST provides the option to use an efficient
iterative solver or a direct solution and is available from ESTSC
(TRUST84).
The TRUST code can be coupled with the FLUX program (available from the
same source) to generate a velocity field and the program MILTVL to
calculate travel times and to generate pathlines and isochrones.
A utility package for TRUST-II has been presented by McKeon et al. (1983;
see references). This package contains three programs: SOILGEN for
generating soil characteristics, a grid generating package called GRIDGEN,
and MLTRAN which is a convective transport package.
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SOILGEN contains subroutines to calculate soil moisture characteristic
curves based on the work of Haverkamp, Van Genuchten, and Brooks and Su.
The user supplies laboratory determined moisture content vs. matric
potential points. The code minimizes the sum squared error of the
function over the experimental data. Relative hydraulic conductivity
functional relationships may be determined using the Haverkamp function if
experimental data xs available or a method based on the Muslem theory if
only moisture characteristic curve data is available.
GRIDGEN was developed to facilitate quick grid generation for use with
TRUST-II and supplies the data for blocks 4 and 5 of the TRUST-II code.
MLTRAN uses the method of characteristics to solve the advective transport
equation with retardation. This package uses a finite element grid,
therefore the original TRUST-II grid must be transformed by MLTRAN using
user supplied data. This model also consists of 6 submodels that contours
potentxal head, water content, and pressure head, generates a plot of the
finite element mesh, and plots the movement of water and contaminant
fronts.
Petersen and Wilson (1988? see references) studied the effect of an
unsaturated zone between a stream and the water table on the infiltration
from the stream. Specifically, they simulated the connection or
disconnection between surface water and groundwater caused by a clogging
layer at the bottom of the stream. Five numerical variably saturated flow
models (TRUST, UNSAT2, FEMWATER, T3FEMWATER, and SATURN) were evaluated
with respect to their capabilities in simulating infiltration,
exfiltration, multidimensional unsaturated and saturated seepage, and
groundwater mounding.
IGWMC Key: 121 Model name: TERZAGI
Model category: saturated flow, deformation
Authors; Narasimhan, T.N
Current version
Release date
First released
1981
1976	IGWMC Check-date: 09/90
Institution of Model Development: Lawrence Berkeley Lab., Earth Sc. Div.
Univ. of California, Berkeley, CA 94720
Code Custodian: Narasimhan, T.N.
Univ. of California - Berkeley, Dept. of Materials Sc.
and Mineral Eng.
Berkeley, CA 94720
Model Developed for; research, general use, education
Documentation: theory, user's guide, examples, code listing,
verification
Model Testing: verification, lab. datasets
Peer Review: concepts, theory
Availability: public domain, source code
Computer Requirements: compiler
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Abstract:
TERZAGI is a integrated finite difference model which computes steady and
nonsteady pressure head distributions and one-dimensional compaction in
two-dimensional saturated, heterogeneous, anisotropic porous media with
complex geometry.
IGWMC Key: 122 Model name: PLUMP
Model category; unsaturated flow
Authors: Narasimhan, T.N., and S.P. Neuman
Current version:
Release date: 1981
First released: 1975	IGWMC Check-date: 09/90
Institution of Model Development: Lawrence Berkeley Lab., Earth Sc. Div.
Univ. of California, Berkeley, CA 94720
Code Custodian: Narasimhan, T.N.
Univ. of California - Berkeley, Dept. of Materials Sc.
and Mineral Eng.
Berkeley, CA 94720
Model Developed for: research, general use, education
Documentation: theory, user's guide, examples, verification
Model Testing: verification
Peer Review:	concepts, theory
Availability:	public domain, source code
Computer Requirements:	compiler
Abstract:
FLUMP is a mixed implicit-explicit finite element program for the
computation of steady and nonsteady, two-dimensional areal or
cross-sectional pressure-head distribution in heterogeneous, anisotropic,
variably saturated porous media with complex geometry. The matrix
equations are solved using the point acceleration method by Evans, closely
related to the point Jacobi method. The time step is automatically
adjusted.
Remarks:
FLUMPS is a version of FLUMP allowing for subsidence due to pumping in a
multi-layered aquifer system, developed by S.P. Neuman, C. Preller, and
T.N. Narasimhan.
FLUMP is especially suited for problems with moderate or high saturation.
Some stability problems may be encountered while applying code to
dessicated soils.
FLUMP is based on the computer code TRUMP for temperature distributions in
multi-dimensional systems, developed by A. L. Edwards, Lawrence Livermore
Laboratory, University of California, Livermore, in 1969.
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IGWMC Key: 160 Model name: SCHAFF
Model category: saturated flow, heat transport
Authors: Sorey, M.L., and M.J. Lippmann
Current version:
Release date: 1976
First released: 1974	IGWMC Check-date: 09/90
Institution of Model Development: U.S. Geological Survey, Water Resources
Division
Menlo Park, Calif.
Code Custodian: Lippman, M.
Lawrence Berkeley Lab., Earth Sc. Div.
1 Cyclotron Road, Berkeley, CA 94720
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
research, general use
theory, user's guide, examples
restricted non-proprietary, source code
compiler
Abstract:
SCHAFF is a three-dimensional finite difference model to simulate coupled
unsteady heat transport and fluid flow in slightly compressible, saturated,
heterogeneous porous media under confined conditions. It includes
convective- dispersive transport and matrix conduction. Coupling takes
place through temperature-dependent fluid density. The finite difference
equations are solved using a Gauss-Seidel algorithm.
IGWMC Key: 195 Model name: NON-LINEAR FE/FD REGRESSION GROUNDWATER
FLOW MODEL
Model category: saturated flow, inverse model
Authors: Cooley, R.L., and R.L. Naff
Current version:
Release date: 1985
First released; 1975	IGWMC Check-date: 10/90
Institution of Model Development: U.S. Geological Survey, Water Resources
Div., Federal Center, Denver, CO 80225
Code Custodian: Cooley, R.L.
U.S. Geological Survey, Water Resources Div.
Box 25046, 413 Federal Center, Lakewood, CO 80225
Model Developed for: research, general, use, education
Documentation: theory, user's guide, examples, program structure,
code listing, verification
Model Testing: verification
Peer Review: concepts, theory, documentation
Availability: public domain, source code
Computer Requirements: compiler
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Abstract:
An interactive, inverse groundwater flow model using non-linear regression
and finite-element or (integrated) finite-difference simulation. It
estimates areally distributed discharge and recharge, boundary fluxes and
heads, vertical hydraulic conductance, and transmissivity distribution
based on best fit hydraulic head distribution for steady state, two-
dimensional horizontal groundwater flow in an anisotropic, heterogeneous
aquifer. The regression is based on steady-state observed heads, prior
estimates of the regression parameters and their reliability, and known
fluxes into or out of the aquifer. Various statistics associated with the
regression analysis are computed.
Remarks:
A discussion on computational efficiency of methods for minimizing
functions is presented in Cooley's paper "A Comparison of Several Methods
of Solving Nonlinear Regression Groundwater Problems" published in Water
Resources Research, Vol 21{10), pp. 1525-1538
IGWMC Key: 260 Model name: DELTA
Model category: saturated flow, management/optimization
Authors: Morel-Seytoux, H.J., C. Rodriquez, and C. Daly
Current version:
Release date: 1981
First released: 1974	IGWMC Check-date: 09/90
Institution of Model Development: Colorado State Univ., Dept. Civil Eng.
Fort Collins, CO 80523
Code Custodian: Morel-Seytoux, H.J.
Colorado State Univ., Dept.
Fort Collins, CO 80523
of Civil Eng.
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
Abstract:
research, general use
theory, user's guide, examples
verification
concepts, theory
restricted non-proprietary, source code
compiler, MPSX optimization software
DELTA is a conjunctive use stream-aquifer model. It simulates
two-dimensional transient areal groundwater flow in a confined or
unconfined heterogeneous, isotropic aquifer and the quasi one-dimensional
flow in a connected river. It calculates aquifer drawdown, river stage
and aquifer return flow with the finite difference method. The model uses
stream-aquifer response coefficients (discrete kernels) and mathematical
programming for optimization. The decision variables are pumping rates,
upstream river inflows, initial drawdown and recharge rates.
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IGWMC Key: 280 Model name: NITROSIM
Model category: unsaturated flow, solute transport
Authors: Rao, P.S.C.
Current version:
Release date: 1981
First released: 1980	IGWMC Check-date: 09/90
Institution of Model Development: Univ. of Florida, Soil Science Dept.
2169 Mccarty Hall, Gainesville, FL 32611
Code Custodian: Rao, P.S.C.
Univ. of Florida, Soil Science Dept.
2169 McCarty Hall, Gainesville, FL 32611
Model Developed for:
Documentation:
research, general use
theory, user's guide, code listing
Model Testing: verification
Peer Review: concepts, theory
Availability:	public domain, source code
Computer Requirements;	compiler
Abstract:
NITROSIM is a one-dimensional finite difference model for transient
simulation of vertical transport, plant uptake, and transformations of
nitrogen m the rootzone. The model calculates nitrogen concentrations
and fluxes. It can handle capillary rise, infiltration and evaporation
and allows for hysteresis in soils. Transport and transformation processes
included are advection, dispersion, ion exchange, oxidation/reduction
reactions, complexation, and first-order chemical decay.
IGWMC Key: 290 Model name: NMODEL/WASTEN
Model category: unsaturated flow, solute transport
Authors:' Selim, H.M., J.M. Davidson, and I.K. Iskander
Current version:
Release date: 1980
First released: 1976	IGWMC Check-date: 11/92
Institution of Model Development: Louisiana State Univ., Agronomy Dept.
Baton Rouge, LA 70803
Code Custodian: Iskander, I.K.
U.S. Army Corps of Eng., Cold Regions Res. and Eng. Lab.
Hanover, NH 03755
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
research, general use
theory, user's guide, examples, code listing,
verification
verification, lab. datasets
concepts, theory
proprietary, purchase; source code
compiler
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Abstract:
NMODEL/WASTEN is a finite difference model for the simulation of steady or
unsteady one - dimensional, vertical flow of water, and transport and
transformation of nitrogen in unsaturated, multilayered homogeneous soils.
The model includes the simulation of capillary forces, dispersion,
molecular dxffusion, adsorptxon, xon-exchange, nxtrxfxcatxon,
denitrification, immobilization, mineralization and plant uptake of water
and nitrogen.
Remarks:
A simplified model for simulation of nitrogen transformations and
transport in land treatment of waste water is presented in Selim and
Iskander (CRREL, 1980? see references). The model predicts the behavior
of NHj-K and NOj-N in soils. It solves the transient soil water flow
equation simultaneously with the equation describing the transformation,
transport and plant uptake of nitrogen in uniform or multi-layered soils.
The simplified model handles various flow and transport boundaries.
IGWMC Key: 291 Model name: PMODEL
Model category: unsaturated flow, solute transport
Authors: Selim, H.M.
Current version:
Release date: 1982
First released: 1978
IGWMC Check-date: 09/90
Institution of Model Development: Louisiana State Univ., Agronomy Dept.
Baton Rouge, LA 70803
Code Custodian:
Louisiana State Univ., Agronomy Dept.
Baton Rouge, LA 70803
Model Developed for: research, general use
Documentation:	theory, user's guide, examples, verification
Model Testing:	verification, lab. datasets
Peer Review:	concepts, theory
Availability:	proprietary, purchase? source code
Computer Requirements:	compiler
Abstract:
PMODEL is a finite difference model for the simulation of steady-state or
unsteady one-dimensional, vertical flow of water, and transport and
transformation of phosphorus in unsaturated, multilayered homogeneous
soils. The model includes simulation of capillary forces, dispersion,
molecular diffusion, (non-linear) adsorption, ion exchange,
immobilization, mineralization, occlusion and plant uptake of water and
phosphorus.
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IGWMC Key: 322 Model name: PLASM
Model category; saturated flow
Authors: Prickett, T.A., and C.G. Lonnquist
Current version: 2.0
Release date: 1992
First released: 1971	IGWMC Check-date: 03/92
Institution of Model Development: Illinois State Water Survey
Box 232, Urbana, Illinois 61801
Code Custodian: Prickett, T.A.
Thomas A. Prickett and Assoc., Inc.
6 G.H. baker Drive, Urbana, II 61801
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
Abstract:
research., general use, education
theory, user's guide, examples, program structure,
code listing, verification
verification, field datasets, synth. datasets, code
intercomparison
concepts, theory, coding, accuracy, documentation
public domain, source code, compiled (PC) version
IBM PC/AT (small version), 640 Kb RAM, CGA, math
coprocessor; compiler for larger versions and other
platforms
PLASM (Prickett Lonnquist Aquifer Simulation Model) is a finite difference
model for simulation of transient, two-dimensional or quasi -threedimensional
flow in a single or raulti-layered, heterogeneous, anisotropic aquifer
system. The original model of 1971 consisted of a series of separate
programs for various combinations of simulation options. Later versions
combined most of the options in a single code, including variable
pumping rates, leaky confined aquifer conditions, induced infiltration
from a shallow aquifer or a stream, storage coefficient conversion
between confined and water table conditions, and evapotranspiration
as a function of depth to water table. The model uses the iterative
alternating implicit method (IADI) to solve the matrix equation.
Remarks:
IGWMC distributes an Intel 80i86/DOS version (Version 2.11 06/93) as part
of a program package including separate codes for confined (CONPLASM) and
water table (UNCPLASM) conditions and a textual preprocessor for input data
preparation (PREPLASM). Contact International Ground Water Modeling
Center, Colorado School of Mines, Golden, Colorado 80401, USA.
MODELCAD is a graphical oriented, model-independent pre-processor to
prepare and edit input files for two- and three-dimensional groundwater
models, including aquifer properties, boundary conditions, and grid
dimensions. The program prepares input files for MODFLOW, MOC, PLASM and
RANDOM WALK, among others. File formatting routines for other models are
available upon request. (see IGWMC Key # 6690)
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IGWMC Key: 513 Model name: GAFETTA
Model category: saturated flow, heat transport
Authors: Finder,	G.F., P.B. Kinnmark, and C.l. Voss
Current version:
Release date: 1980
First released:	1980	IGWMC Check-date: 09/90
Institution of Model Development: Royal Inst, of Technology, Dept. of
Water Resources Eng.
S-100 44 Stockholm, Sweden
Code Custodian: Voss, C.I.
U.S. Geological Survey, Water Resources Div.
431 National Center, Reston, VA 22092
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
Abstract:
research, general use
theory, user's guxde, examples, program structure,
code listing, verification
verification
concepts, theory
public domain, source code, compiled (PC) version
IBM PC/AT (small version), MS-DOS 2.1, 640 Kb RAM,
CGA, math coprocessor? compiler for larger versions
on other platforms
GAFETTA is a two-dimensional finite element model intended to simulate
thermal energy transport in confined and unconfined aquifers with
horizontal non-density dependent ground water flow. The model computes
the distribution of hydraulic head and temperature in an anisotropic,
heterogeneous aquifer and allows analysis of temperature changes in over -
and underlying layers due to pumping or injection wells, artificial or
natural infiltration of hot or cold water, steady leakage of hot or cold
water from adjacent aquifers, connection with lakes and rivers, and
changing air temperature.
Remarks:
The GAFETTA documentation includes program listing and user instructions
for the program MESHGEN (A Mesh Generator by I. Kinnmark).
The basis of the GAFETTA code is a finite element flow and solute transport
model developed by G.F. Pinder (see ISOQUAD 2; IGWMC Key # 0511).
IGWMC Key: 514 Model name: AQUIFEM
Model category: saturated flow
Authors: Pinder, G.F., and C.I. Voss
Current version:
Release date: 1979
First released: 1979	IGWMC Check-date: 09/90
Institution of Model Development: Princeton Univ., Dept. of Civil Eng.,
Water Resources Program
Princeton, Nev; Jersey 08540
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Code Custodian: Voss, C.I.
U.S. Geological Survey, Water Resources Div.
431 National Center, Reston, VA 22092
Model Developed for: research, general use
Documentation: theory, user's guide, examples, code listing,
verification
Model Testing: verification, code intercomparison
Peer Review: concepts, theory
Availability: public domain, source code, compiled J PC) version
Computer Requirements: IBM PC/AT (small version), 640 Kb RAM, CGA, math
coprocessor; compiler for larger versions on other
platforms
Abstract:
AQUIFEM is a two-dimensional finite element model for the simulation of
transient, areal saturated groundwater flow in an isotropic,
heterogeneous, confined, leaky-confined, or water table aquifer with areal
recharge and distributed wells* It incorporates steady-state or transient
leakage through confining layers. The model is based on ISOQUAD (1971) •, a
water-balance calculation was added in the 1974 Pinder and Frind version.
This version, called AQUIFEM, includes groundwater velocity calculations and
other modifications.
IGWMC Key: 515 Model name: PTC (Princeton Transport Code)
Model category: saturated flow, solute transport
Authors: Babu, D.K.,
Current version:
Release date: 1989
First released: 1984
G.F. Pinder, A. Niemi, and D.P. Ahlfield
IGWMC Check-date: 02/93
Institution of Model Development: Princeton Univ., Dept. of Civil Eng.
Water Resources Program
Princeton, New Jersey 08540
Code Custodian: Pinder, G.F.
Univ. of Vermont, School of Eng. and Math.
101 Votey Building, Burlington, Vermont 05405
Model Developed for:
Documen ta t i on:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
Abstract:
research, general use, education
theory, user's guide, examples, program structure,
verification
verification
concepts, theory
proprietary, purchase; source code, compiled (PC)
vsirs ion
IBM PC/AT, 640 Kb RAM (small version), math
coprocessor, CGA; Intel 80386 based computer, 4 Mb
RAM (large version); compiler for other platforms
PTC is a three-dimensional model for simulation of uncoupled transient
flow and solute transport in confined or unconfined porous media. The
model solves the advective-dispersive transport equation for reactive and
non-reactive solutes using a hybrid finite element Galerkin technique
coupled with a finite difference scheme. The FEM formulation is applied
to the horizontal slices, and the FDM to the cross-sections.
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IGWMC Key: 581 Model name: FTRANS (fracture Flow, Thermal and
RAdioNuclide Solute transport)
Model category: saturated flow, solute transport, heat transport, porous
medium, fractures
Authors: Huyakorn, P.S., et al.
Current version:
Release date: 9/82
First released: 1982	IGWMC Check-date: 11/92
Institution of Model Development: GeoTrans, Inc,
46050 Manekin Plaza, Suite 100,
Sterling, VA 22170
Code Custodian: Code custodian
Performance Assessment Dept., Off. of Nuclear Waste
Isolation
Battelle Project Management Div., 505 King Avenue,
Columbus, OH 43201
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
research, general use, education
theory, user's guide, examples, program structure,
code listing, verification
verification
concepts, theory, coding, documentation
public domain, source code
compiler
Abstract;
FTRANS is a 2D fin ite-element model to simulate transient, saturated
single phase flow, heat transport, and chemical or radionuclide transport
in fractured or unfractured, anisotropic, heterogeneous, confined or
semi-confined multilayered porous media. For any type of fractured
system, the flow and transport analysis are performed taking into account
interaction between the porous matrix and the fractures. The analyses are
made in the main areal flow plane, in a vertical cross-section, or in an
axisymmetric configuration. The code fully accounts for fluid leakages,
advection, dispersion, sorption, first-order decay, chain reactions, and
solute diffusion and heat conduction in the porous matrix, coupled thermal
fluid capability and density-dependent flow and solute transport.
IGWMC Key: 582 Model name: GREASE
Model category: saturated flow, solute transport, heat transport, porous
medium, fractures
Authors: Huyakorn, P.S.
Current version: 2.0
Release date: 7/82
First released: 1982	IGWMC Check-date: 09/9 0
Institution of Model Development: GeoTrans, Inc,
46050 Manekin Plaza, Suite 100,
Sterling, VA 22170
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Code Custodian: GeoTrans, Inc.
46D50 Manekin Plaza, Suite 100, Sterling, VA 22170
Model Developed for: research, general use, education
Documentation: theory, user's guide, examples, verification
Model Testing: verification
Peer Review: concepts, theory
Availability: proprietary, license,- source code
Computer Requirements: compiler
Abstract:
GREASE 2 is a multi-purpose finite element model to simulate transient,
multi-dimensional, saturated groundwater flow, solute and/or energy
transport in fractured and non-fractured, anisotropic, heterogeneous,
multilayered porous media. The analysis can be performed for confined,
semiconfined, or unconfined groundwater reservoir systems. Fluid leakage
or heat transfer between the aquifer and its confining layer can be taken
into account. The model allows for analysis of areal flow, vertical
cross-sectional flow or flow in an axisymmetric configuration. Coupled
thermal fluid flow capability, and density dependent flow and solute
transport capability area also available. Sorption and decay can be
included in the solute transport analysis.
Remarks:
A concise graphics package is available. This package contains routines
for plotting finite element meshes, contours of equal hydraulic head,
concentration, or temperature values, as well as routines for plotting
velocity fields.
IGWMC Key: 583 Model name: SATURN
Model category: unsaturated flow, solute transport
Authors: Huyakorn, P.S., S.D. Thomas, J.W. Mercer, and B.H. Lester
Current version
Release date
First released
1.3
1985
1982	IGWMC Check-date: 12/92
Institution of Model Development: GeoTrans, Inc,
46050 Manekin Plaza, Suite 100,
Sterling, VA 22170
Code Custodian: Ward, D.S.
GeoTrans, Inc.
46050 Manekin Plaza, Suite 100, Sterling, VA 22170
Model Developed for: general use, education
Documentation: theory, user's guide, examples, code listing,
verification
Model Testing: verification, lab. datasets, code intercomparison
Peer Review: concepts, theory
Availability: proprietary, license; source code
Computer Requirements: compiler
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Abstract:
SATURN (SATurated-Unsaturated flow and RadioNuclide transport) is a
two-dimensional finite element model to simulate steady-state or
transient, single phase fluid flow and advective-dispersive transport in
fully- or partially saturated, anisotropic, heterogeneous porous media.
The flow problem is solved using the Galerkin method to approximate the
Richard's equation, and a fully implicit scheme for the time domain. The
resulting nonlinear algebraic equations are solved using either the Picard
or Newton-Raphson iterative techniques. Soil hydraulic functions are
entered either in functional or tabular form. It uses the
upstream-weighted residual method to treat the transport equation. It
allows the use of both triangular and quadrilateral elements. Darcy
fluxes are calculated in the center of the elements causing
discontinuities in fluxes across elements and local mass balance
inaccuracies.
Remarks:
The codes UNSAT2, BIK2D/3D, TRUST, FEMWATER, TOUGH, SUTRA, SATURN,
TRACR3D, and FLAMINGO are described and compared in: Yeh, T.C., T.C.
Rasmussen- and D.D. Evans. 19BB. Simulation of Liquid and Vapor Movement
in Unsaturated Fractured Rock at the Apache Leap Tuff Site: Models and
Strategies. NUREG/CR-5097, U.S. Nuclear Regulatory Commission,
Washington, D.C. This report includes a detailed description of the code
characteristics and evaluates their applicability based on governing
equations and code options.
Nodal coordinates for SATURN may be generated by SATURN itself (for simple
rectangular geometry) or by STRPGN, a separate mesh generator.
Petersen and Wilson (1988; see references) studied the effect of an
unsaturated zone between a stream and the water table on the infiltration
from the stream. Specifically, they simulated the connection or
disconnection between surface water and groundwater caused by a clogging
layer at the bottom of the stream. Five numerical variably saturated flow
models (TRUST, UNSAT2, FEMWATER, T3FEMWATER, and SATURN) were evaluated
with respect to their capabilities in simulating infiltration,
exfiltration, multidimensional unsaturated and saturated seepage, and
groundwater mounding.
IGWMC Key: 584 Model name: STAFAN/STAFANT
Model category: saturated flow, heat transport, deformation, porous
medium, fractures
Authors: Kuvakorn, P.S.
Current version: 2.0
Release date: 10/B2
First released: 1982	IGWMC Check-date: 09/90
Institution of Model Development: GeoTrans, Inc,
46050 Manekin Plaza, Suite 100,
Sterling, VA 22170
Code Custodian: GeoTrans, Inc.
46050 Manekin Plaza, Suite 100, Sterling, VA 22170
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Model Developed for: research, general use
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
theory, user's guide, examples, program structure,
code listing, verification
verification
concepts, theory, coding, accuracy, documentation
public domain, source code
compiler
Abstract:
STAFAN {STress And Flow ANalysis) is a two-dimensional cartesian or
axisymmetric finite element model for simulation of transient fluid flow
and the coupled or uncoupled interaction of fluid pressure and mechanical
stresses in deformable fractured and unfractured porous media. The model
takes into account the flow behavior of a deformable fractured system with
fracture-porous matrix interactions, the coupling effects of fluid
pressure and mechanical stresses in a medium containing discrete joints,
elastic response of the rock mass, and elastic-plastic response of the
individual joints of the rock mass subject to the combined fluid pressure
and mechanical loading. The fractured media may be represented by the
dual porosity or the discrete fracture approach. STAFANT {STAFAN -
Thermal version) includes thermo-mechanical deformation processes and
includes heat flow due to conduction and convection in the fractured
porous medium.
IGWMC Key: 588 Model name: SEFTRAN
Model category: saturated flow, solute transport, heat transport, porous
medium, fractures
Authors: Huyakorn, P.S., D.S. Ward, J.O, Ruinbaugh, and R.W. Broome
Current version: 2.0
Release date: 1986
First released: 1983	IGWMC Check-date: 11/92
Institution of Model Development: GeoTrans, Inc,
4S050 Manekin Plaza, Suite 100,
Sterling, VA 22170
Code Custodian: Ward, D.S.
GeoTrans, Inc.
46050 Manekin Plaza, Suite 100, Sterling, VA 22170
Model Developed for: general use, education
Documentation: theory, user's guide, examples, code listing,
verification
Model Testing: verification
Peer Review: concepts, theory, accuracy
Availability: proprietary, license; source code, compiled (PC)
version
Computer Requirements: Intel 80386 based computer, 2 Mb RAM, cga, math
coprocessor
Abstract:
SEFTRAN (Simple and Efficient Flow and TRANsport model) is a concise
finite element model to simulate transient two-dimensional fluid flow and
non-coupled transport of non-conservative contaminants or heat in
(an)isotropic, heterogeneous confined or unconfined aquifers. The solute
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transport analysis can take into account hydrodynarnic dispersion,
equilibrium sorption, and first-order decay. It can solve the flow and
transport equations in an areal plane, a vertical cross-section, or an
axisymmetric configuration. Line elements may be used to simulate
discrete fractures or rivers. The velocity field may be steady-state or
transient. Boundary conditions supported include prescribed hydraulic
head, nodal flow flux, head-dependent flux, recharge, and nodal solute
flux.
IGWMC Key: 569 Model name: TRAFRAP
.Model category; saturated flow, solute transport, porous medium, fractures
Authors: Huyakorn, P.S., H.O. White, Jr., V.M. Guvanasen, and B.H. Lester
Current version; 2.0
Release date: 5/94
First released: 1986	IGWMC Check-date: 07/94
Institution of Model Development: GeoTrans, Inc,
46050 Manekin Plaza, Suite 100,
Sterling, VA 22170
Code Custodian: International Ground Water Modeling Center
Colorado School of Mines, Golden, CO 80401
Model Developed for: research, general use, education
Documentation: theory, user's guide, examples, code listing,
verification
Model Testing: verification
Peer Review: concepts, theory
Availability: proprietary, purchase; source code, compiled (PC)
version
Computer Requirements: Intel 80386 based computer, 4 Mb RAM, CGA, math
coprocessor; compiler for other platforms
Abstract:
TRAFRAP-WT is a two dimensional finite element code which simulates
transient groundwater flow and transport of a non-conservative contaminant
or a radionuclide in fractured or unfractured porous media. Fracture
systems may be modeled using either the dual porosity approach or the
discrete fracture approach or a combination of both. TRAFRAP-WT can be
used for both confined and unconfined aquifer systems. The model solves
either for flow or transport. Solving for flow provides a steady-state
velocity field which can be used in a successive transport simulation.
The flow and transport equations are solved using improved finite element
algorithms with special features designed to handle aquifer-aquitard
systems and options to account for water table boundary conditions and
fracture skin effects. The code takes into account: fluid interactions
between fractures and porous matrix blocks; advective-dispersive transport
in fractures and diffusion in the porous matrix blocks and fracture skin,*
and chain reactions of radionuclides. In addition, for the fractured
system the model distinguishes between cases in which the matrix blocks
have low permeability and those in which the matrix blocks have
substantial permeability. The model can handle various model geometries
and element shapes (rectangular, triangular and linear).
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Remarks:
TRAFRAP is an updated version of FTRANS, a finite element code which was
developed by GeoTrans, Inc. for Intera Environmental Consultants, Inc. as
part of the ONWI/SCEPTER program managed by Battelle Memorial Inst.,
Columbus, Ohio (see IGWMC Key # 581)
IGWMC Key: 612 Model name: HOTWTR
Model category: saturated flow, heat transport
Authors: Reed J.E.
Current version: 1.1
Release date: 1993
First released: 1985	IGWMC Check-date: 06/94
Institution of Model Development: U.S.
Div.,
Code Custodian: Reed, J.E.
U.S. Geological Survey,
Federal Center, Denver,
Geological Survey, Water Resources
Federal Center, Denver, CO 80225
Water Resources Div.
CO 80225
Model Developed for:
Documentation:
Model Testing;
Peer Review:
research, general use
theory, user's guide, code listing, verification
verification
concepts, theory
Availability: public domain, source code,
Computer Requirements: Intel 80386 based computer
compiled (PC) version
(IGWMC version), CGA, 16
Mb RAM; compiler for other platforms
Abstract:
HOTWTR is a 3-D finite-difference model to simulate steady-state coupled
water and heat flow in an isotropic, heterogeneous aquifer system with
uniform thermal properties and viscosity dependent hydraulic conductivity.
The model does not allow change of state. Driving forces on the system
are external hydrological conditions of recharge from precipitation and
fixed hydraulic head boundaries. Heat flux includes geothermal heat-flow,
conduction to the land surface, advection from recharge, and advection to
or from fixed head boundaries. The program uses an iterative procedure
that a1ternatlvely solves the ground-water flow and heat flow equatxons,
updating advective flux after solution of the ground-water flow equation,
and updating hydraulic conductivity after solution of the heat-flow
equation. The coupling xs based on Ixnear xnterpolatxon of hydraulic
conductivity-viscosity-temperature tables. The finite difference equations
for both ground-water flow and heat flow are solved using a direct method.
Density is considered constant in space, and time of travel is determined
through particle-tracking. Necessary data for this program include the
distribution of hydraulic conductivity and porosity, the water level at
recharge or discharge sites, recharge from precipitation, temperature of
recharged water, land-surface temperature, geothermal heat flow, average
thermal conductivity of the water-saturated rock, and volumetric heat of
the fluid.
Remarks:
A modified version of HOTWTR (1994) has bee prepared by and is available
from IGWMC (1934) and includes a utility to convert the three-dimensional
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head and temperature distribution generated by HOTWTR into two-dimensional
files representing selected (vertical or cross-sectional) profiles or
(horizontal) slices. Results can be used as input to third-party graphic
software for two-dimensional contour plotting.
IGWMC Key: 680 Model name: GWSIM-II
Model category; saturated flow, solute transport
Authors: Knowles, T.R.
Current version:
Release date: 8/81
First released: 1978	IGWMC Check-date: 10/92
Institution of Model Development: Texas Dept. of Water Resources,
Engineering and Snvironrn. Systems
Section, Austin, TX 78758
Code Custodian; Texas Natural Res. Inform. System, Texas Dept. of Water
Resources, P.O. Box 13087, Austin, TX 78758
Model Developed for.* general use
Documentation: theory, user's guide, examples, program structure,
code listing
Model Testing:
Peer Review: concepts, theory
Availability: public domain, source code
Computer Requirements: compiler
Abstract:
GWSIM-II is a finite difference model for simulation of steady-state or
transient, two-dimensional groundwater flow and conservative
advective-dispersive solute transport in an anisotropic, heterogeneous,
(leaky) confined or unconfined aquifer. The model can handle a
combination of confined and unconfined conditions. The flow model
supports no-flow and (induced) recharge boundaries; specified head is
introduced by specifying a large storage factor. Solute flux is
introduced with recharging water (from surface or wells). The transport
model has zero-solute-flux boundaries. The uncoupled finite difference
equations for flow and transport are both solved using the iterative
alternating direction implicit (IADI) method, together with Gauss
elimination. The flow model is based on the Prickett and Lor.nquist model
of 1971.
Remarks:
The (flow) model is based on the Prickett-Lonnquist aquifer simulation
model 'PLASM' version 1971 (see IGWMC Key # 0322).
IGWMC Key: 690 Model name: VCHFLD
Model category: saturated flow, solute transport
Authors: Reeves, M.
Current version:
Release date: 1981
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First released; 1977	IGWMC Check-date: 11/92
Institution of Model Development: Intercomp Resource Development &
Engineering, Inc.
3000 Youngfield Street, Suite 285,
Lakewood, CO 80215
Code Custodian: Reeves, M.
Intera Environmental Consultants, Inc.
6850 Austin Center Blvd., #300, Austin, TX 78731
Model Developed for: general use
Documentation:
Model Testing:
Peer Review:
Availability: proprietary, license; source code
Computer Requirements: compiler
Abstract;
VCHFLD is a proprietary code that describes the movement of 5 chemical
species in an anisotropic, heterogeneous, confined aquifer. Transport
processes that are simulated include advection, dispersion, diffusion,
sorption, and reactions. Solution methods utilized are Galerkin FEM,
Gaussian elimination or SOR, and bilinear basis functions.
IGWMC Key: 694 Model name: STFLO
Model category: saturated flow
Authors: Faust, C.R., T. Chan, B.S. Ramada, and B.M. Thompson
Current version;
Release date: 10/82
First released; 1982	IGWMC Check-date: 09/90
Institution of Model Development: GeoTrans, Inc,
46050 Manekin Plaza, Suite 100,
Sterling, VA 22170
Code Custodian: Code custodian
Performance Assessment Dept., Off. of Nuclear Waste
Isolation, Battelle Project Management Div., 505 King
Avenue, Columbus, OH 43201
Model Developed for: research, general use
Documentation: theory, user's guide, examples, program structure,
code listing, verification
Model Testing: verification
Peer Review: concepts, theory, coding, documentation
Availability: public domain, source code
Computer Requirements: compiler
Abstract:
STFLO is a linear finite element code for simulation of steady-state,
two-dimensional {areal or vertical) plane or axisymmetric ground water
flow in anisotropic, heterogeneous, confined, or leaky confined aquifers.
It supports specified head and flux boundary conditions. A 4-node
isoparametric quadrilateral element is implemented, allowing both
generally shaped quadrilaterals and triangles to be used.
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Remarks:
This code is part of the SCEPTER project (Systematic, Comprehensive,
Evaluation of the Performance and Total Effectiveness of a Repository) for
nuclear waste, carried out by the Office of Nuclear Waste Isolation (ONWI)
of the Battelle Project Management Division, Columbus, Ohio.
IGWMC Key: 695 Model name: NETFLO (Network Flow)
Model category; saturated flow, fracture network
Authors: Pahwa, S.B., and B.S. Rama Rao
Current version;
Release date: 9/82
First released: 1982	IGWMC Check-date: 09/90
Institution of Model Development:
INTERA Environm. Consult., Inc.
6850 Austin Center Blvd, Suite 300,
Austin, TX 78731
Code Custodian: Code custodian
Performance Assessment Dept., Off. of Nuclear Waste
Isolation, Battelle Project Management Div., 505 King
Avenue, Columbus, OH 43201
Model Developed for:
Documentation:
research, general use
theory, user's guide, examples, program structure,
code listing, verification
Model Testing: benchmarking (analyt. solutions), code
intercomparison
concepts, theory, coding, documentation
public domain, source code
compiler
Peer Review:
Availability:
Computer Requirements:
Abstract:
NETFLO is a finite element model to simulate steady-state saturated flow
in a fractured medium by an equivalent three-dimensional network of
in-series and parallel flow members. The algorithm is based on the
application of Darcy's law along each member and conservation of mass at
each node. The boundary conditions may be either prescribed pressure or
source/sink fluxes at nodes. The code outputs pressure at all nodes,
velocities and fluxes in all members, and all possible flow paths from a
repository node to the discharge node. It also provides mean flow and
transport characteristics along each path for input to an one-dimensional
transport code like G1T0DT.
Remarks:
The NETFLO code provides output in a format which can be used directly as
input to the one-dimensional transport code GETOUT (see IGWMC Key # 2080),
This code is part of the SCEPTER project (Systematic, Comprehensive,
Evaluation of the Performance and Total Effectiveness of a Repository) for
nuclear waste, carried out by the Office of Nuclear Waste Isolation (ONWI)
of the Battelle Project Management Division, Columbus, Ohio.
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IGWMC Key: 696 Model name; BORHOL
Model category: saturated flow, solute transport, heat transport,
deformation, hydrogeochemi ca1
Authors: Rickertsen, L.D., C.J. Noronha, and M. Reeves
Current version:
Release date: 7/84
First released; 1984	IGWMC Check-date: 09/90
institution of Model Development: INTERA Environm. Consult., Inc.
6850 Austin Center Blvd, Suite 300,
Austin, TX 78731
Code Custodian: Code custodian
Performance Assessment Dept., Off. of Nuclear Waste
Isolation, Battelle Project Management Div., 505 King
Avenue, Columbus, OH 43201
Model Developed for:
Documentation:
Model Testing:
Peer Review:
general use
theory, user's guide, examples, program structure,
code listing, verification
verification
concepts, theory, coding, documentation
Availability: public domain, source code
Computer Requirements: compiler
Abs trac t:
BORHOL is a finite difference model that treats the case of an open
bore hole through a salt formation connecting two aquifers, and determines
the borehole radius as a function of depth and time. Within the borehole,
the model treats the transient, one-dimensional coupled processes of flow,
heat transport and volume modification subject to the mechanism of salt
dissolution, precipitation and creep. Within the rock formation, the
model simulates three-dimensional transport of heat from a nuclear waste
repository since both creep and convective heat transfers to the fluid
depends upon the rock temperature.
IGWMC Key: 697 Model name: SWENT (Simulator for Water, Energy and
Nuclide Transport)
Model category: saturated flow, solute transport, heat transport
Authors: Lantz, R.B., S.B. Pahwa, and B.S. RamaRao
Current version:
Release date: 4/83
First released: 1983	IGWMC Check-date: 11/92
Institution of Model Development: INTERA Environm. Consult., Inc.
6850 Austin Center Blvd, Suite 300,
Austin, TX 78731
Code Custodian: Code custodian
Performance Assessment Dept., off, of Nuclear Waste
Isolation, Battelle Project Management Div., 505 King
Avenue, Columbus, OH 43201
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Model Developed for: research, general use
Documentation: theory, user's guide, examples, program structure,
code listing, verification
Model Testing:	verification, code intercomparison
Peer Review:	concepts, theory, coding, documentation
Availability:	public domain, source code
Computer Requirements:	compiler
Abstract:
SWENT (Simulator for water. Energy, and Nuclide Transport) is a finite
difference model for simulation of transient, multidimensional transport
of fluid, energy, a single inert chemical species, and any number of
radionuclides in straight or branched chains, through a heterogeneous,
anisotropic confined aquifer. Flow and transport are coupled through
density and viscosity. Salt dissolution and leaching can be simulated.
Aquifer porosity is treated as function of pressure. Individual processes
or a combination of the processes, including well bore flow, may be
simulated using a number of boundary conditions. The model permits the
choice of backward or central difference approximations and either direct
or SOR iterative methods may be used for solving the matrix equations.
Remarks:
GRASP CGRound-water Adjoint Sensitivity Program; see references) computes
measures of the behavior of a groundwater system and the system's
performance for waste isolation, and estimates the sensitivities of these
measures to system parameters. The sensitivities are computed using the
adjoint method. GRASP presumes steady-state, saturated groundwater flow
and postprocesses the results of the multidimensional finite difference
code SWENT.
IGWMC Key: 730 Model name: GEOTHER, GEOTHER/VT4
Model category: water/steam flow, heat transport
Authors: Faust, C.R., and J.W, Mercer
Current version: 2.0
Release date: 19 83
First released: 1977	IGWMC Check-date: 04/91
Institution of Model Development: U.S. Geological Survey, Water Resources
Div., National Center, Reston, VA 22092
Code Custodian: code custodian
Performance Assessment Dept., Off. of Nuclear Waste
Isolation, Battelle Project Management Div., 505 King
Avenue, Columbus, OH 43201
Model Developed for: research, general use
Documentation: theory, user's guide, examples, program structure,
code listing, verification
Model Testing: verification
Peer Review: concepts, theory, coding, documentation
Availability: public domain, source code
Computer Requirements: compiler
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Abstract:
GEOTHER is a finite difference model for simulation of transient
three-dimensional, single and two-phase heat transport In anisotropic,
heterogeneous, porous media. It is based on the continuity equations for
steam and water, which are reduced to two nonlinear partial differential
equations in which the dependent variables are fluid pressure and
enthalpy. The nonlinear coefficients in the equations are calculated
using Newton-Raphson iterations, and an option is provided for using
either upstream or midpoint weighing on the mobility terms. GEOTHER may
be used to simulate the fluid-thermal interaction in rock that can be
approximated by a porous media representation. It can simulate heat
transport and flow of compressed water, two-phase mixtures, and
super-heated steam. GE0THER/VT4 includes an equation for heat conduction
in dry blocks.
Remarks:
GEOTHER version 2 is also available from GeoTrans, Inc., 46050 Manekin
Plaza, Suite #100, Sterling, VA 22170. An updated version, GEOTHER/VT4,
is specifically designed for the analysis of high-level radioactive waste
applications (Bian et Al; see references). Among others, this latter
version includes a heat conduction equation which handles dry blocks,
resulting in a three-equation model. Contact authors at Battelle Pacific
Northwest Lab., Richland, WA 99352.
IGWMC Key: 740 Model name: USGS-2D-TRANSPORT/MOC/KONBRED
Model category: saturated flow, solute transport
Authors: Konikow, L.P., and J.D. Bredehoeft
Current version: 4.0
Release date: 09/94
First released: 1976	IGWMC Check-date: 09/94
Inst: tution of Model Development: U.S. Geological Survey, Water Resources
Div.
432 National Center, Reston, VA 22092
Code Custodian: Konikow, L.F.
U.S. Geological Survey, Water Resources Div.
431 National Center, Reston, VA 22092
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
Abstract:
general use
theory, user's guide, examples, program structure,
code listing, verification
verification, lab. datasets, field datasets, synth.
datasets, code intercomparison
concepts, theory, coding, accuracy
public domain, source code, compiled {PC, Macintosh)
version
IBM PC/AT, 640 Kb RAM, CGA (small version) ,* Intel
80386 based computer, 4 Mb RAM? Macintosh; compiler
for other platforms
MOC is a two-dimensional model for the simulation of non-conservative
solute transport in heterogeneous, anisotropic aquifers. It computes
changes in time in the spatial concentration distribution caused by
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convective transport, hydrodynarnic dispersion, mixing or dilution from
recharge, and chemical reactions. The chemical reactions include
first-order irreversible rate reaction (e.g. radioactive decay),
reversible equilibrium-controlled sorption with linear, Freundlich or
Langmuir isotherms, and monovalent and/or divalent ion-exchange reactions.
The model assumes that fluid density variations, viscosity changes, and
temperature gradients do not affect the velocity distribution. MOC allows
modeling heterogeneous and anisotropic, confined aquifers.
MOC solves the ground-water flow equation and the non-conservative
solute-transport equation in a stepwise (uncoupled) fashion. The computer
program uses the Alternating Direct Implicit (ADI) method or the Strongly
Implicit Procedure (SIP) to solve the finite-difference approximation of
the ground-water flow equation. The SIP procedure for solving the
ground-water flow equation is most.useful when areal discontinuities in
transmissivity exist or when the ADI solution does not converge. MOC uses
the method of characteristics of solve the solute transport equation. It
uses a particle tracking procedure to represent convective transport and a
two-step explicit procedure to solve the finite-difference equation that
describes the effects of hydrodynarnic dispersion, fluid sources and sinks,
and divergence of velocity. The explicit procedure is subject to
stability criteria, but the program automatically determines and
implements the time step limitations necessary to satisfy the stability
criteria. MOC uses a rectangular, block-centered, finite-difference grid
for flux and transport calculations. The program allows spatially varying
diffuse recharge or discharge, saturated thickness, transmissivity, boundary
conditions, initial heads and initial concentrations, and an unlimited
number of injection and withdrawal wells. An interactive preprocessor,
PREMOC, is included with the program.
Remarks:
The 1989 (and later) version includes equilibrium-controlled sorption using
the Langmuir and Freundlich isotherms, and first-order irreversible-rate
reaction as described by Goode and Konikow (1989), and based on Grove and
Stollenwerk (1984; see references). It should be noted that the USGS-MOC
model should not be used with the contrast between longitudinal and
transverse dispersivity greater than 10:1.
TRACK (IGWMC key 0741) is a modification of the USGS MOC model to track
representative water or tracer particles initially loaded along specific
lines (Garabedian and Konikow, 1983). Also, USGS MOC has been modified by
Hutchinson to allow head-dependent flux as a boundary condition;
Hutchinson, C.B. et al. 1981. Hydrogeology of Well-field Areas near
Tampa, Florida. USGS Open-File Report 81-630.
A modification to allow linear and non-linear sorption isotherms and
first-order decay was introduced in 1982: Tracy, J.V. 1982. Users Guide
and Documentation for Adsorption and Decay Modifications of the USGS
Solute Transport Model. NUREG/CR-2502, Div. of Waste Management, Off. of
Nuclear Material Safety and Safequard, U.S. Nuclear Regulatory Comm.,
Washington, D.C. The latest version of this code, MOCMOD84, is published
in Goode et al. (1986? see user references of USGS-MOC)
A stochastics-based analysis of the performance of the MOC model in
remedial action simulations is discussed in: El-Kadi, A.I. 1988.
Applying the USGS Mass-Transport Model (MOC) to Remedial Actions by
Recovery Wells. Ground Water, Vol. 26(3), pp. 281-288.
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A modified version of the 1978 version of the USGS MOC model has been
presented by Kent et al, 1983 (see references). Modifications include a
water-table option for flow and non-linear sorption. The same authors
developed a menu-driven, preprocessor for their version of MOC. For more
information contact Dr. Douglas C. Kent, School of Geol., Oklahoma State
University, Stillwater, Oklahoma.
The MOC package distributed by the International Ground Water Modeling
Center includes a preprocessor (PR2M0C) to prepare input files, a,
postprocessor (POSTMOC) to reformat parts of the output file to allow the
import the results in graphic display programs, and two versions of the
MOC simulation program, MOCAID and MOCSIP. MOCADI and MOCSIP are
identical apart from the methods used to solve the finite difference flow
equations. IGWMC distribution includes source code for the MOCAID and
MOCSIP modules.
MACMOC is the implementation of the USGS Method of Characteristics Solute
Transport Model (MOC) for the Macintosh. The data input editor,
simulation code and output postprocessor are integrated in a single
application. Graphic output includes head and concentration contouring,
and velocity vector plotting. It requires a Macintosh Plus with System
6.02 and Finder 6.1 or higher and at least 2 Mb RAM. MACMOC is available
from the Scientific Software Group.
MODELCAD is a graphical oriented, model- independent pre-processor to
prepare and edit input files for two- and three-dimensional groundwater
models, including aquifer properties, boundary conditions, and grid
dimensions. The program prepares input files for MODFLOW, MOC, PLASM and
RANDOM WALK, among others. File formatting routines for other models are
available upon request. (see IGWMC Key # 6690)
MOCGRAF is a program developed by TECSOFT, Inc. to provide graphics
capability to MOC. It uses the output from MOC to contour heads and
concentrations and to plot velocity vectors. It supports a variety of
graphic screen formats, printers and plotters. MOCGRAF requires TECSOFT1s
TRANSLATE program. MOCGRAF is available from Scientific Software Group.
MOCTIME is a graphic module for postprocessing MOC files. It generates
plots of concentration versus time for up to 50 grid points. Contact
Scientific Software Group.
IGWMC Key; 741 Model name-. USGS FRONT-TRACKING
Model category: saturated flow
Authors; Garabedian, S.P., and L.F. Konikow
Current version:
Release date: 19S3
First released: 1983	IGWMC Check-date: 09/90
Institution of Model Development: U.S. Geological Survey, Water Resources
Div., National Center, Reston, VA 22092
Code Custodian: Konikow, L.F.
U.S. Geological Survey, Water Resources Div.
431 National Center, Reston, VA 22092
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Model Developed for: research, general use
Documentation: theory, user's guide, examples, program structure,
code listing, verification
Model Testing: verification
Peer Review: concepts, theory
Availability: public domain, source code
Computer Requirements: compiler
Abstract:
USGS FRONT-TRACKING is a finite difference model for simulation of
advective transport of a conservative tracer dissolved in groundwater
under steady or transient flow conditions. The model calculates heads,
velocities and tracer particle positions. The convective transport
mechanism represented in this model has been adapted from the USGS
solute transport model MOC, developed by Konikow and Bredehoeft (1978) .
IGWMC Key: 742 Model name: MOCDENSE
Model category: saturated flow, solute transport
Authors: Sanford, W.E., and L.F. Konikow
Current version: 2.1
Release date: 01/93
First released:	IGWMC Check-date: 10/93
Institution of Model Development: U.S. Geological Survey, Water Resources
Div., National Center, Reston, VA 22092
Code Custodian: Konikow, L.F.
U.S. Geological Survey, Water Resources Div.
431 National Center, Reston, VA 22092
Model Developed for: research, general use
Documentation: theory, user's guide, examples, program structure,
code listing, verification
Model Testing: benchmarking (analyt. solutions), verification
Peer Review: concepts# theory, documentation
Availability: public domain, source code, compiled (PC) version
Computer Requirements: IBM PC/AT, 640 Kb RAM, CGA, math coprocessor;
compiler for other platforms
Abstract:
MOCDENSE is a two-dimensional, cross - sectional model for the analysis of
saltwater intrusion. It simulates conservative solute transport and
dispersion of one or two constituents in a ground-water system with
density-dependent flow. The model is a modified version of the USGS
two-dimensional solute transport model MOC by Konikow and Bredehoeft,
which uses a combination of the finite difference method and the method of
characteristics to solve the flow and transport equations. MOCDENSE solves
for fluid pressure rather than hydraulic head because of the inclusion of
variable density. The flow and transport equations are solved in a
coupled fashion as the density is considered a function of concentration
of one of the constituents. MOCDENSE can handle varying recharge, aquifer
inhomogeneities, variable aquifer thickness, and complex boundary
conditions. MOCDENSE was tested on an idealized seawater-intrusion
problem for which Henry (1964) developed an closed-form solution. The
results were nearly identical to those of other numerical model tested on
the same problem. Since October 1994, MOCDENSE includes a preprocessor.
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Remarks:
MOCDGRAF/MOCDGRAF EM, developed by TECSOFT and distributed by Scientific
Software, provide graphic capability for MOCDENSE as distributed by
Scientific Software. Using output from MOCDENSE, MOCDGRAF contours
concentrations (both trace solute and density-controlling) and
superimposes velocity vectors on the contour plots. It generates plots
for selected pumping periods and time steps with grids consisting of up to
24 nodes in the x-direction and 20 nodes in the z-direction.
IGWMC Key: 77 0 Model name: USGS-3D-FLOW
Model category: saturated flow
Authors: Trescott, P.C., S.P. Larson, and L.J. Torak
Current version: 1.0
Release date: 1982
First released: 1975	IGWMC Check-date: 12/92
Institution of Model Development: U.S. Geological Survey, Water Resources
Div., National Center, Reston, VA 22092
Code Custodian: Torak, L.J.
U.S. Geological Survey, Water Resources Div.
411 National Center, Reston, VA 22092
Model Developed for:
Documentation:
Model Testing;
Peer Review
Availability
Computer Requirements
Abstract:
general use, education
theory, user's guide, examples, program structure,
code listing, verification
verification, lab. datasets, field datasets, code
i n t er cornpa r i s on
concepts, theory, documentation
public domain, source code, compiled (PC) version
IBM PC/AT {small version), 640 Kb RAM, CGA, math
coprocessor; compiler for larger versions on other
platforms
USGS-3D-FLOW is a widely used, general purpose finite difference model to
simulate transient, three-dimensional and quasi-three-dimensional,
saturated flow in anisotropic, heterogeneous (layered) groundwater
systems. The flow system can be fully confined or the uppermost zone can
be a water-table aquifer. The model simulates well discharge/recharge
from any layer and recharge to the uppermost layer. The 1982 update
extended the program to simulations involving leaky rivers,
evapotranspiration as a linear function of depth to water, and discharge
to drains and springs. For most applications, USGS-3D-FL0W has been
replaced by USGS-MODFLOW.
Remarks:
Modifications and corrections for the original version are published in
Torak (1982; see references). The report includes the modified source code.
A modified version of this three-dimensional model has been published in
Morissey et Al. (1980; see references). This modified version allows
simulation of leakage along streams from all layers of the model and
simulation of recharge from the land surface to all layers.
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A version with transient leakage from confining layers is used in Torak
and Whiteman (1982; see user references); The report contains additional
user's instructions as well as a program for parameter estimation based on
head computation by the USGS-3D-FLOW model (see also IGWMC Key # 3880),
A version including interaction of rivers and the simulated aquifer
developed by S.D. Larson in 1978 has been published in Trapp and Geiger
(1986; see references).
A listing of a modified version to include evapotranspiration and
interaction between a river and the upper aquifer is presented in Ryder et
Al. {1980; see references).
Modifications were made to the Trescott et al 1976 version by Hotchkiss
and Levings E1986; see references) to improve interpretation of results
and performance of the model. These improvements included the
incorporation of an acceleration parameter for the iteration procedure,
reformatting of arrays, extended recharge capabilities, and improvement of
the treatment of leakage. Also, a statistical procedure for calibration
was added.
The USGS 3D-Flow model has been modified (Kontis and Handle, 1988; see
references) to simulate the effects of wells open to various combinations
of aquifers and the effects of ground-water density that varies spatially
but is time invariant. The modifications are primarily restricted to the
computation of the conductance terms in the original model. In addition,
programs are given that compute data required for the simulation of
variable-density effects: model-block conductances (VARDEN), and
density/viscosity (STEAM)
A modified version is published in Helgesen et Al. (1982; see references).
The modifications concern leakage between layers, spring discharge,
stream-aquifer interchange, springflow recharge to middle layer,
water-budget determination for each layer, location of largest head
changes and flow to each constant head node. The report includes the
modified program listing.
The program has also been modified in 1982 to extend its application to
head-dependent sources and sinks. Changes were also made to enhance
convergence of an iterative solution by the strongly implicit procedure.
The modifications and corrections are published in Guswa and Le Blanc
(1981; see references).
A pre-processor enabling the use of the three-dimensional flow model for
simulation of variable density groundwater flow is given in Weiss (1982,
OFR 82-352; see references). This program requires information on aquifer
elevation, thickness, and groundwater density. The program then calculates
pseudo-input terms for transmissivity, well input and leakance. A program
to calculate ground-water density from aquifer depth, temperature and
dissolved solids concentration is also included.
A program written to calculate input arrays for transmissivity to be used
with USGS- 3D - FLOW model is described in Weiss (1982, OFR 82-447; see
references).
Posson et Al. (1980; see references) published an extensively modified
version. This version is annotated as IGWMC Key # 2740.
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A version including land subsidence from groundwater extraction is
presented by Meyer and Carr (1979 ; see user references). Different
storage coefficients are used for elastic and inelastic compression of two
clay layers.
A version providing significantly increased output options, including
cell-by-cell information on internal fluxes, fluxes through confining
layers and iteration information is documented by Gerhart and Lazorchick
(1984; see references). Other options included in this version is an
increase in array size related to stream interaction and increased
flexibility for input of pumping rates.
A modified version to include tile drainage and river leakage has been
published in McDonald and Fleck {1978; see references); this report
includes an application of the modified code.
A modification that effectively handles confined bed and aquifer pinchouts
and reduces computer memory requirements for situations with complex
boundaries, has been published in Leahy (1982; see references). This
reference includes program listing and user instructions.
IGWMC Key: 771 Model name: USGS- 2D-FLOW
Model category: saturated flow
Authors: Trescott, P.C., G.F. Pinder, and S.P. Larson
Current version: 1.0
Release date; 1976
First released: 1975	IGWMC Check-date: 12/92
Institution of Model Development: U.S. Geological Survey, Water Resources
Div., National Center, Reston, VA 22092
Code Custodian: Tcrak, L.J.
U.S. Geological Survey, Water Resources Div.
411 National Center, Reston, VA 22092
Model Developed for: research, general use, education
Documentation: theory, user's guide, examples, program structure,
code listing, verification
Model Testing: verification, field datasets, code intercomparison
Peer Review: concepts, theory, documentation
Availability: public domain, source code, compiled (PC) version
Computer Requirements: IBM PC/AT (small version), 640 Kb RAM, CGA, math
coprocessor; compiler for larger versions on other
platforms
Abstract:
USGS•2D - FLOW is finite difference model to simulate transient,
two-dimensional horizontal flow in an anisotropic and heterogeneous,
confined, leaky-confined or water-table aquifer. It uses the iterative
alternating-direction implicit approximation of the ground-water flow
equation. A more recent implementation is the USGS code JDB2D/3D.
Remarks
A modified version to enable simulation of the interaction between surface
water and ground water during periods of low stream flow is given by
Ozbilgin and Dickerman (1984; see references).
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A modified version including stream flow accounting procedure has been
published in Crist {1983) and its use is described in Crist {1980) (see
references).
An aquifer simulation model using the conjugate gradient method for
solving the finite difference equations was applied to the simulation of
ground-water flow in an alluvial aquifer at the Rocky Mountain Arsenal,
Denver, Colorado (Manteufel et al (1983; see references). The results of
the steady-state simulation have been compared with an earlier modeling
study at the same site.
A modified version has been published by Hutchinson et Al. (1981; see
references). This version includes head controlled flux boundary
conditions. Only the SO?, solution method is used. This report contains
program code, user instructions and example in- and output using field
data.
A modification of the solution technique using the direct-solution
algorithm (D4) instead of the strongly implicit procedure (SIP) is given
by Larson (1978; see references).
A version of this USGS-2D flow model in which the original equation
solving subroutines are replaced by one which is based on the
conjugate-gradient method has been published (Manteufel et Al., 1983; see
references). This method has a higher efficiency for certain kinds of
problems because it does not require the use of iteration parameters. The
newly written subroutines are listed in the report.
IGWMC Key: 772 Model name: SSIM3D
Model category; fresh/salt water flow
Authors: Trescott, P.C., S.P. Larson, and D.B. Sapik
Current version:
Release date: 1987
First released: 1983	IGWMC Check-date: 10/90
Institution of Model Development: U.S. Geological Survey, Water Resources
Div., District Office, Tacoma, Washington
Code Custodian: U.S. Geological Survey, Water Resources Div.
1201 Pacific Avenue - Suite 600, Tacoma, WA 98402
Model Developed for: general use
Documentation: theory, user's guide, examples, program structure,
code listing, verification
Model Testing: verxficstion (analytical solutions)
Peer Review: concepts, theory, documentation
Availability: public domain, source code
Computer Requirements: compiler
Abstract:
SSIM3D (Steady-state Saltwater Intrusion Model for 3-Dimensional
ground-water flow) is a quasi-threedimensional flow model to simulate
steady flow of fresh water in a multiple aquifer system containing moving
fresh water and static salt water. The salt water has hydrostatic
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pressure distribution. The model is a modification of the USGS
three-dimensional flow model by Trescott and Pinder (1975). The two
fluids are assumed xmmxscxble, wxth constant densities and separated by 3
sharp interface at which the heads follow the Hubert (1941) relationship.
In addition to heads, boundary fluxes and global water balance, the finite
difference model calculates the location of the interface. The model is a
modification of the USGS-3D FLOW model (Trescott, Larson and Pinder, 1975)
IGWMC Key: 781 Model name: MMT-1D
Model category: saturated flow, solute transport
Authors: Kaszeta, F.E., C.S. Simmons, and C.R. Cole
Current version;
Release date: I960
First released: 1976	IGWMC Check-date: 09/90
Institution of Model Development: Battelle Pacific Northwest
Laboratories, Environm. Sciences Div.
P.O. Box 999, Richland, WA 99352
Code Custodian: Cole, C.R.
Battelle Pacific NW Laboratories, Water and land
Resources Div., P.O. Box 999, Richland, WA 99352
Model Developed for: research, general use
Documentation: theory, user's guide, examples, program structure,
code listing, verification
'Model Testing: verification
Peer Review: concepts, theory, coding, documentation
Availability: public domain, source code
Computer Requirements: compiler
Abstract:
MMT-1D is a numerical model for simulation of transient one-dimensional
ground water flow and movement of radionuclides and other non-conservative
contaminants in saturated/unsaturated porous media. Advective transport
is simulated using the finite difference method, while dispersion is
represented by the random walk technique. The authors also developed
two- and quasi - three-dimensional versions for saturated porous media.
IGWMC Key; 951 Model name: IDPNGM
Model category: saturated flow, inverse model
Authors: Guvanasen, V.
Current version:
Release date: 1979
First released: 1979	IGWMC Check-date: 09/90
Institution of Model Development: James Cook Univ., Dept. of Civil and
Systems Eng, Queensland, 4811, Australia
Code Custodian: Volker, R.E,
James Cook Univ. of North Queensland, Dept. of Civil and
Systems Eng., Queensland, 4811, Australia
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Model Developed for: research, general use
Documentation:	theory, user's guide, examples
Model Testing:
Peer Review:	concepts, theory
Availability:	restricted non-proprietary, source code
Computer Requirements:	compiler
Abstract;
IDPNGM is a finite difference model to solve the direct inverse problem of
parameter identification in a confined or unconfined heterogeneous
isotropic aquifer with transient two-dimensional horizontal ground water
flow using a damped Newton-Raphson technique.
IGWMC Key,* 1010 Model name: GGWP (Golder Groundwater Computer Package)
Model category: saturated flow, solute transport
Authors: Miller, I., and J. Marlon-Lambert
Current version:
Release date; 1992
First released: 1978	IGWMC Check-date: 11/92
Institution of Model Development: Golder Associates, Inc.
Redmond, Washington
Code Custodian: Golder Associates, inc.
4104 148th Avenue, NE, Redmond, WA 98052
Model Developed for: research, general use
Documentation: theory, user's guide, examples, program structure
Model Testing:
Peer Review;
Availability; proprietary, license; source code (main frame),
compiled (PC) version
Computer Requirements; Intel 80386 based computer, 2 Mb RAM, CGA, math
coprocessor
Abstract:
GGCP is an integrated suite of computer programs for steady-state or
transient finite element simulation of two-dimensional, vertical or
axisymmetric and quasi-three dimensional flow and transport of reactive
solutes in anisotropic, heterogeneous, multi-layered aquifer systems.
Auxiliary computer programs are included for semi-automatic mesh
generation, input preparation, and presentation of model results (contour
and vector plots). Confined, leaky-confined and unconfined flow problems
are simulated with the programs AFPM (Aquifer Flow in Porous Media) and
FPM (Flow in Porous Media). They can handle a moving phreatic surface,
evaporation, and interaction with surface flows. The transport program
(SOLTR) includes convection, dispersion, dilution, sorption and
radioactive decay.
Remarks:
The Golder Groundwater Package is a suite of six programs for modeling
groundwater flow and solute transport. It includes: MLTMSH and AFPOL are
preprocessors; AFPM is a program for quasi-3D finite element solution of
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layered aquifer systems; FPM is a program for cross-sectional or
axisymmetric flow solutions; SOLTR is a program for solute transport in
flow fields computed by either AFPM or FPM,- and FOLCON is a plotting
program.
IGWMC Key: 1092 Model name: FLO
Model category: unsaturated flow
Authors: Vandenberg, A.
Current version:
Release date: 19B5
First released: 19B5	IGWMC Check-date: 08/92
Institution of Model Development: National Hydrology Research Institute
Inland Waters Directorate, Ottawa, K1A
OE7 Ontario, Canada
Code Custodxan: Vandenberg, A*
National Hydrology Research Institute
Inland Waters Directorate, Ottawa, KlA 0E7 Ontario, Canada
Model Developed for:	research, general use
Documentation:	theory, examples, code listing, verification
Model Testing:	lab, datasets
Peer Review:	concepts, theory
Availability:	public domain, source code
Computer Requirements:	compiler
Abstract:
FLO is a lumped parameter model based on a soil-moisture accounting
procedure for a system of up to 50 layers using a forward finite
difference technique. The model is designed to simulate the elements of
the hydrological cycle directly influenced by soil and surface drainage
improvements, permitting the assessment of the effect of drainage
improvement on the total discharge from a drained plot for a given
precipitation input. Total discharge from a drained plot includes surface
runoff and drain discharge. Transfer functions considered include
internal vertical flow based on Darcy's law, infiltration at the surface,
discharge to the groundwater, drain discharge, surface runoff, and
evaporation.
Remarks:
FLO is an adaptation of the program 'FLOW' originally developed by G.P.
Wind (J. of Hydrology, 24 (1975):1-20). The present model adds routines
for simulation of surface runoff, for input of a steady flux from which
the initial moisture distribution is calculated, and fast Newton iteration
of the height of the ground-water table. It provides additional output
options including ground-water discharge, surface discharge, and total
discharge.
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IGWMC Key: 1230 Model name: AQU-1
Model category: saturated flow
Authors: Rushton, K.R. , and L.M, Tomlinson
Current version:
Release date: 1979
First released: 1979	IGWMC Check-date: 09/90
Institution of Model Development: Univ. of Birmingham, Dept. of Civil Eng.
P.O. Box 363, Birmingham, BI5 2TT,
United Kingdom
Code Custodian: Rushton, R.R,
Univ. of Birmingham, Dept. of Civil Eng.
P.O. Box 363, Birmingham, BIS 2TT, United Kingdom
Model Developed for: research, general use, education
Documentation:	theory, user's guide, examples, code listing
Model Testing:
Peer Review:	concepts, theory, documentation
Availability:	restricted non-proprietary, source code
Computer Requirements:	compiler
Abstract:
AQU-1 is a simple finite difference model for simulation of transient,
two-dimensional horizontal groundwater flow in a heterogeneous,
am sotropx c conf x ned or 1 eaky - conf med 3cux f er.
IGWMC Key: 1771 ' Model name: MUST (Model for Unsaturated flow above a
Shallow water Table)
Model category: unsaturated flow
Authors: De Laat, P.J.M.
Current version:
Release date: 1985
First released: 1982	IGWMC Check-date: 10/90
Institution of Model Development: International Institute for Hydraulic
& Environm, Eng., Delft, The Netherlands
Code Custodian: De Laat, P.J.M.
International Inst, for Hydraulic & Env. Eng.
Delft, The Netherlands
Model Developed for:
Documentation:
research, general use
theory, user's guide, examples, program structure,
code listing, verification
verification, lab. datasets, field datasets
concepts, theory
Availability: restricted non-proprietary, source code
Computer Requirements: compiler
Model Testing:
Peer Review:
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Abstract;
MUST is a finite difference model which simulates one-dimensional
vertical, unsaturated groundwater flow, evapotranspiration, plant uptake,
and interception of precipitation by plants.
Remarks:
MUST is an extensively modified version of the code UNSAT by P.J.M.
De Laat. These modifications especially concern the way evapotranspiration
is treated and include interception of precipitation.
The MOST model has been frequently coupled with regional two- and quasi -
three dimensional flow models.
IGWMC Key: 1791 Model name: SLAEM, SLAEMS, MLAEM, SLW, SLWL
Model category: saturated flow
Authors: Strack, O.D.L.
Current version;
Release date: 1992
First released: 1981	IGWMC Check-date: 1992
Institution of Model Development: Strack Consulting, Inc.
23 Black Oak Rd,
North Oaks, MN 55127
Code Custodian: Strack, O.S.
Univ. of Minnesota, Dept. of Civil Eng.
122 CME Building, Minneapolis, MN 55455
Model Developed for: research, general use, education
Documentation: theory, user's guide, examples, verification
Model Testing: verification
Peer Review: concepts, theory
Availability: proprietary, purchase or license; compiled (PC)
version
Computer Requirements: Intel 80386 based computer, 4 Mb RAM, DOS 3.1, CGA,
math coprocessor (larger versions available)
Abstract:
SLABM (Single Layer Analytic Element Model), SLAEMS (SLAEM with
Stratification), and MLAEM (Multi-Layer Analytic Element Model) are models
for analysis of two- and three-dimensional steady-state and transient
groundwater flow in single or multi-layered aquifer systems based on the
Analytical Element Method. The programs are highly interactive and
include extensive graphics. Analytic elements included in the set of
programs are: uniform flow, rainfall infiltration, wells, areal aquifer
inhomogeneities, leakage through a confining layer, multiple aquifer
leakage, rivers, lakes, polders, slurry walls and variable density flow.
The models are especially suited to analyze flow in regional aquifer
systems. SLW and SLWL are scaled-down, educational versions of the SLAEM
program.
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Remarks:
The computer program SYLENS (Haitjema and Strack) was developed for the
Nashville district of the U.S. Army Corps of Engineers, specifically to
simulate the flow in the aquifer system near the Tennessee-Tombigbee
Waterway. This machine-dependent program has been archived.
The computer programs SLW and SLWL are scaled-down versions of SLAEM and
are provided with Strack (1989; see references).
IGWMC Key: 1792 Model name: WhAEM
Model category: saturated flow
Authors: Strack,	O.D.L., and H.M. Haitjema
Current version:
Release date:	1993
First released:	1993	IGWMC Check-date: 10/93
Institution of Model Development: Univ. of Minnesota, Dept. of Civil Eng.
122 CME Building, 500 Pillsbury Dr.,
Minneapolis, MN 55455
and
School of Public and Environmental Affairs
SPEA 470, Indiana University
Bloomington, IN 47405
Code Custodian: Center for Subsurface Modeling Support (CSMoS)
P.O. Box 1198
Ada, OK 74821
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
general use
model setup, input instructions
code intercomparison
concepts, mathematical framework, performance,
documentation, usability
public domain, source code, compiled (PC) version
Intel 80386 based computer, 4 Mb RAM, 5 Bib disk
space, DOS 3.3, math coprocessor, mouse, VGA
Abstract:
WhAEM is a single-layer steady-state groundwater flow model designed to
delineate capture zones and isochrones of groundwater residence times for
the purpose of wellhead protection. The program consists of two modules:
GAEP (Geographic Analytic Element Preprocessor) and CZAEM (Capture Zone
Analytic Element Model). Data preparation with GAEP is performed in two
steps: (1) digitizing hyrography to obtain location of linesinks/sources
and pond features; and base map for orientation; and and (2)onscreen '
construction of CZAEM files. CZAEM, an interactive, command-driven code,
has extensive graphic capabilities to support the post-simulation analysis
and presentation of results, including contours and pathlines. CZAEM is
based on the Dupuit-Forcheimer assumption for horizontal two-dimensional
flow in an aquifer and includes elements for wells with either specified
discharge or specified head at well boundary, and for line sinks. Various
hydraulic features may be represented by a combination of well and
line-sink elements, such as streams, well-fields, and lakes. Also, CZAEM
supports a 'rain' element, allowing the introduction of recharge from
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IGWMC Key: 1793 Model name: GFLOW
Model category: saturated flow
Authors: Haitjema, H.M.
Current version: 1.0
Release date: 1994
First released: 1994	IGWMC Check-date; 10/94
Institution of Model Development: Indiana Univ., School of Public and
Env. Affairs (SPEA), Bloomington, Indiana
Code Custodian: Haitjema, H.M.
Haitjema Software, LLC.
8007 Castleton Road, Indianapolis, IN 46260
Model Developed for: general use
Documentation: concepts and theory, installation and input
instructions, example problems
Model Testing: intercomparison, field testing
Peer Review: concepts, mathematical framework
Availability: proprietary, purchase compiled version
Computer Requirements: Intel 80386 based computer, 4 Mb RAM, 2 Mb free disk
space for program and example files, DOS 5.0, VGA
graphics
Abstract:
GFLOW is an integrated groundwater modeling system based on the analytic
element method. It consists of four components: 1) a graphic preprocessor
GAEP; 2) a single aquifer analytic element model GFLOW1; a graphic
postprocessor GFPRIN7; and a digitizing program TABLET. Data preparation
with GAEP is performed in two steps: 1) digitizing hydrography to obtain
location for line sinks/sources and pond features, and base map for
orientation; 2} on screen construction of GFL0W1 input files. GFLOW1 is a
steady-state conjunctive surface water and groundwater flow model based on
the Dupuit-Forchheimer assumption and superposition of analytical elements.
The program includes features for simulation of injection and withdrawal
wells, line sinks and sources, ponds, regional uniform flow, and areal
recharge. The point and line sinks and sources can be specified by their
recharge or discharge rate, or by a constant head or gradxent. Locally,
transient flow due to a well or fully three-dimensional features may be
included {e.g., partially penetrating well, shallow pond). Furthermore,
the model can handle local heterogeneity and anisotropy. The program
supports three-dimensional streamline tracing and computation of
stream-section discharge (as represented by constant head/gradient line
sinks and sources). The postprocessor GFPRINT allows for scaling,
rotating and previewing of the graphic images resulting from the
simulations, and output to a variety of devices. Graphic output includes
streamlines, traveltimes, and head and head difference contours.
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IGWMC Key: 1814 Model name: TOFEM-N
Model category: saturated flow
Authors: Olsthoorn, T.N.
Current version:
Release date: 1985
First released: 1984	IGWMC Check-date: 09/90
Institution of Model Development: KIWA, N.V., Rijswijk, The Netherlands
Code Custodian: Boersma, W., KIWA N.V.
P.O. Box 1072, 3430 BB Nieuwegein, The Netherlands
Model Developed for: research, general use
Documentation: theory, user's guide, examples, verification
Model Testing: verification
Peer Review:
Availability: proprietary, purchase; source code
Computer Requirements: compiler
Abstract:
TOFEM-N is a series of finite element models for simulation of transient
horizontal flow in a single or multi-layered, confined, semi-confined or
unconfined, heterogeneous, anisotropic aquifer system. Model features
include time-varying first-, second- and third-type (induced
recharge/discharge) from/to streams) boundary conditions, time-varying well
discharge/recharge, and txme-varymg sreal recharge. The model area can be
partially confined and partially unconfined. It supports
confined/unconfined conversions in time. One version, TOFEM-7, includes
automatic calibration facilities»
IGWMC Key: 1820 Model name: FLOP, FLOP-LIESTE, FL0P-Z1, FLOP-ZN
Model category: saturated flow
Authors: van den Akker, C., R. Lieste, and E.J.M. Veling
Current version:
Release date: 19 89
First released: 1974	IGWMC Check-date: 09/90
Institution of Model Development: Nat. Inst, of Public Health and
Environm. Protection, Bilthoven, The
Netherlands
Code Custodian:
Lieste, R. (FLOP-LIESTE, FL0P-Z1); E. Veling (FLOP-ZN)
RIVM - Nat. Inst, for Public Health and Env. Protection
P.O. Box 1, 3720 AB Bilthoven, The Netherlands
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
general use, education
theory, user's guide, examples, verification
verification
concepts, theory
restricted non-proprietary, source code (main
frame), compiled (PC)
IBM PC/AT, DOS 2.1, 640 Kb RAM, CGA
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Abstract:
The FLOP models are semi-analytical models for calculation of pathlines
and residence times in homogeneous, isotropic, steady-state groundwater
systems. They can handle multiple wells, no-flow and specified flux
boundaries, and areal recharge. Pathline calculation is based on the
Newton-Raphson method. FLQP-LIESTE is designed for single (semi-) confined
aquifers; FL0P-Z1 for a quasi three-dimensional semi-confined aquifer
system; and FL0P-2N for a ir.ul 11 - layered homogeneous aquifer system*
Remarks:
The FLOP programs are extensively used in The Netherlands for calculation
of protection zones around pumping sites and calculation of resident times
for infiltrated water. They include extensive graphic capabilities•
IGWMC Key; 1822 Model name: FRONT
Model category: saturated flow
Authors: van den Akker, C.
Current version:
Release date: 1981
First released: 1975
IGWMC Check-date: 09/90
Institution of Model Development;
Nat. Inst, of Public Health and
Environm. Protection, Bilthoven,
Netherlands
The
Code Custodian: Akker, C. Van Den
RIVM - Nat. Inst, for Health and Inv. Protection
P.O. Box 1, 3720 BA Bilthoven, The Netherlands
Model Developed for;
Documentation:
research, general use, education
theory, user's guide, examples, code listing,
verification
verification
concepts, theory
proprietary, license; source code (main frame),
compiled (PC)
Computer Requirements: IBM PC/AT, 640 Kb RAM, CGA
Model Testing:
Peer Review;
Availability:
Abstract:
FRONT is a semi-analytical model for calculation of pathlines and
residence times in a confined, isotropic, heterogeneous aquifer with
steady-state or transient flow. The integration along the streamlines is
performed with Runge-Kutta, restricting the maximum time step size with a
user-provided error-criterion.
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IGWMC Key: 1852 Model name: SWIFT (Salt Water Interface fay Finite
element Technique)
Model category: fresh/salt water flow
Authors: Verruijt, A., and J.B.S. Gan
Current version: •
Release date: 9/82
First released: 1982	IGWMC Check-date: 09/90
Institution of Model Development: Delft Technical Univ., Dept. Civil Eng.
Stevinweg 1, 2628 CN Delft, The
Netherlands
Code Custodian: Verruijt, A,
Technical Univ. Delft, Dept. of Civil Eng.
Stevinweg 1, 2628 CN Delft, The Netherlands
Model Developed for; research, general use, education
Documentation: theory, user's guide, examples, code listing
Model Testing: verification
Peer Review: concepts, theory
Availability: proprietary, purchase; source code and compiled {PC)
version
Computer Requirements: compiler
Abstract:
SWIFT is a transient, cross-sectional finite element model to simulate
flow of fresh and salt water in a confined, semi - confined or water-table
aquifer of homogeneous permeability and porosity. The purpose of the
model is the computation of the upconing of a sharp interface between the
fresh and salt water.
Remarks:
See also some of the programs in the BEAVERSOFT package of J. Bear and A.
Verruijt (see IGWMC Key # 6590)
IGWMC Key: 1950 Model name: DRAINMOD
Model category: unsaturated flow, solute transport
Authors: Skaggs,	R.W.
Current version:
Release date:	1991
First released:	1975	IGWMC Check-date: 08/93
Institution of Model Development: North Carolina State Univ., Dept. of
Biol. & Agric. Eng.
Rayleigh, NC 27695
Code Custodian: Skaggs, R.W.
North Carolina State Univ., Dept. of Biological and
Agric. Eng.
Raleigh, NC 27695
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Model Developed for:
Documentation:
Model Testing;
Peer Review;
Availability;
Computer Requirements:
Abstract:
DRAINMOD is a model for flow and solute transport in shallow, well-drained
unsaturated zones. The water balance equation includes terms for gas
phase moisture, drainage loss, evapotranspiration loss, outflow to the
saturated zone, and infiltration. The model assumes that the soil water
content is consistent with fluid pressure equilibrium conditions. The
resulting transient soil water flux rates are used as input into a
Petrov-Galerkin advective-dispersive transport model for nonreactive
solutes. DRAINMOD solves simultaneously for recharge to the saturated
zone, the water table elevation, the equilibrium soil water content
distribution, and an evapotranspiration rate, given climatic conditions on
an hourly basis as input. The transport module requires solute
concentration of recharge water, water content distribution, and velocity
profiles to compute solute concentration profiles at different times.
research, general use, education
theory, user's guide, examples, program structure,
code listing
lab. datasets
concepts, theory
public domain, source code
compiler
IGWMC Key: 2032 Model name: FRACT
Model category: saturated flow, solute transport, fracture network
Authors: Pickens, J.F.
Current version:
Release date: 1981
First released: 1979	IGWMC Check-date: 04/91
Institution of Model Development: INTERA Environm. Consult., Inc.
6850 Austin Center Blvd, Suite 300,
Austin, TX 78731
Code Custodian: Pickens, J.F.
Intera Technologies, Inc.
6850 Austin Center Blvd., #300, Austin, TX 78731
Model Developed for:
Documentation;
Model Testing:
Peer Review;
Availability:
Computer Requirements:
research, general use
theory, user's guide, examples, verification
verification, lab. datasets
concepts, theory
proprietary, purchase; source code
compiler
Abstract:
FRACT is a finite element model for simulating flow and advective-dispersive
transport of reactive (retardation and first-order decay) solutes in
saturated fractured media. The model supports confined, leaky-confined and
unconfined conditions in a single aquifer. It handles both fracture
networks and dual porosity where the flow occurs in linear fractures with
solute diffusion into the adjacent matrix blocks. The matrix equations are
solved using Gauss elimination.
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IGWMC Key: 2034 Model name: SHALT
Model category: saturated flow, solute transport, heat transport, porous
medium, fractures
Authors: Pickens, J.F., and G.E. Grisak
Current version:
Release date: 1980
First released: 1979	IGWMC Check-date: 11/92
Institution of Model Development: INTERA Environm. Consult., Inc.
6850 Austin Center Blvd, Suite 300,
Austin, TX 78731
Code Custodian: Pickens, J.F.
Intera Technologies, Inc.
6B50 Austin Center Blvd., #300, Austin, TX 78731
Model Developed for: research, general use
Documentation: theory, user's guide, examples
Model Testing:
Peer Review:	concepts, theory
Availability:	proprietary, purchase? source code
Computer Requirements:	compiler
Abstract:
SHALT is a finite element model that simulates heat and solute transport
in a fractured, anisotropic, heterogeneous, saturated or unsaturated,
confined or unconfined, two-dimensional groundwater flow system. The
Galerkin finite element method uses triangular elements and a sequential
solution technique. The model simulates density dependent compressible
fluid flow, heat convection and conduction, thermal dispersion, solute
advection and dispersion, molecular diffusion, linear equilibrium
adsorption, radioactive decay, ion exchange, and various first-order
chemical reactions. The matrix equations are solved using Gauss
elimination.
Remarks:
An evaluation of the program has been published in: Thomas, S.D., B. Ross,
J.W, Mercer. 1982. A Summary of Repository Siting Models.
NUREG/CR-27 82, U.S. Nuclear Regulatory Commission, Washington, D.C.
IGWMC Key: 2037 Model name; FRACSOL
Model category: solute transport, fracture network
Authors: Grisak,	G.E., and J.F. Pickens
Current version:
Release date:	1981
First released: 1980	IGWMC Check-date: 04/91
Institution of Model Development: INTERA Environm. Consult., Inc.
6850 Austin Center Blvd, Suite 300,
Austin, TX 78731
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Code Custodian: Pickens, J.F.
Intera Technologies, Inc.
6850 Austin Center Blvd., #300, Austin, TX 78731
Model Developed for; research, general use
Documentation: theory, verification
Model Testing: lab. datasets
Peer Review: concepts, theory
Availability: proprietary, purchase,- source code
Computer Requirements: compiler
Abstract:
FRACSOL is an analytical model for simulation of non-reactive solute
transport in planar fractures with diffusion into adjacent matrix blocks.
The solution solves for the transient concentration distribution along the
fracture as well as into the matrix.
IGWMC Key: 2070 Model name: CFEST (Coupled, Fluid, Energy and Solute
Transport)
Model category: saturated flow, solute transport, heat transport
Authors: Gupta, S.K., C.T. Kincaid, P.R. Meyer, and C.R. Cole
CiuriT'Srifc v©3TS2.orii
Release date: 1987
First released: 1981	IGWMC Check-date: 11/92
Institution of Model Development: Battelle Pacific Northwest
Laboratories, Environm. Sciences Div.
P.O. Box 999, Richland, WA 99352
Code Custodian: Cole, C.R.
Battelle Pacific NW Laboratories, Water and land
Resources Div., P.O. Box 999, Richland, WA 99352
Model Developed for: research, general use, education
Documentation: theory, user's guide, examples, program structure,
code listing, verification
Model Testing: verification, lab. datasets, field datasets, synth.
datasets, code intercomparison
Peer Review: concepts, theory, coding, accuracy, documentation
Availability; public domain, source code
Computer Requirements: compiler
Abstract:
CFEST is a three - dimenslonal finite element model for simulation of
steady-state or transient, single-phase Darcian flow, and energy and
solute transport in anisotropic, heterogeneous, multi-layered aquifers.
The code has the capability to model discontinuous and continuous layering
and time-dependent and constant sources/sinks. The partial differential
equations for pressure, temperature, and solute concentration are coupled
with fluid density and viscosity, and used in a Galerkin FEM (linear
elements), sequential solution. The relationship between porosity and
pore-pressure is also accounted for. The model comes with various
programs for data input, gridding and post-processing including streamline
generation and contouring. It has a restart option and data error
checking.
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Remarks:
CFEST has undergone extensive verification testing, among others, as part
of the international HYDROCOIN project. Many of the test problems and the
CFEST performance for the tests have been published.
IGWMC Key: 2071 Model name: UNSAT1D
Model category: unsaturated flow
Authors: Gupta, S.K., C.S. Simmons, F.W. Bond, and C.R. Cole
Current version:
Release date: 1987
First released: 1978	IGWMC Check-date: 10/92
Institution of Model Development: Battelle Pacific Northwest
Laboratories, Environm. Sciences Div.
P.O. Box 999, Richland, WA 99352
Code Custodian; Simmons, C.S.
Battelle Pacific NW Laboratories
P.O. Box 999, Richland, WA 99352
Model Developed for: research, general use
Documentation: theory, user's guide, examples, program structure,
code listing, verification
Model Testing: verification, lab. datasets, code intercomparison
Peer Review: concepts, theory, documentation
Availability: restricted non-proprietary, purchase; source code,
compiled (PC)
Computer Requirements: IBM PC/AT, 640 Kb RAM, CGA; compiler for versions on
other platforms
Abstract:
UNSAT1D is a fully implicit one-dimensional finite difference model for
simulation of transient vertical unsaturated flow ln a homogeneous,
heterogeneous, or layered soil profile. The program simulates
infiltration, vertical seepage, and plant uptake by roots as function of
the hydraulic properties of soil, soil layering, root growth
characteristics, evapotranspiration rates, and frequency, rate, and amount
of precipitation and/or irrigation. It can handle boundary conditions
related to rain, sprinkler or flood irrigation, or constant head
conditions in the upper boundary. The lower boundary can be the water
table, dynamic or quasi-dynamic, or unit gradient. The model estimates
groundwater recharge, irrigation and consumptive use of water, return
flows, etc.
UNSAT1D calculates soil water potential (suction), moisture content, and
soil-water flux rate at each node (depth increment) for each time
interval. The model handles unsaturated, nearly saturated, and saturated
conditions.
The amount of data required by UNSAT1D depends on a given problem. In
general, the input data include the soil-profile description (homogeneous,
heterogeneous, or layered), hydraulic properties of each layer, plant
characteristics (rooting depth may be either constant or a function of
growth, root-distribution, leaf-area index, and wilting point), water
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application (precipitation, irrigation, ponding); and potential
evaporation/transpiration.
Remarks:
A main frame version and an IBM-PC version, complete with updated
documentation is available from EPRI (Electric Power Research Institute),
P.O. Box 50490, Palo Alto, CA 94303.
The models UNSAT1B and HELP have been compared for their use in evaluating
the design of landfill covers (Thompson and Tyler, 1984; see references).
Under humid conditions the two codes predicted similar fluxes through the
clay caps. Under semi-humid and arid conditions the HELP code predicted
significantly greater moisture storage in the cover soil, whereas UNSAT1D
predicted the water would migrate upward from cap and waste and would be
lost to evaporation. This reflects UNSATlD's ability to handle capillary
forces, which become important under dryer conditions.
UNSAT-H is based on a computer code that was developed by Gupta et al
(19 78; see references) to model soil water movement with concurrent crop
water extraction. A version of the Gupta et al. (1978) code, UNSAT1D (IGKMC
Key # 2071), was documented by Bond et al. (1984,* see references).
IGWMC Key: 2072 Model name: FE3DGW
Model category: saturated flow
Authors: Gupta, S.K., C.R. Cole, and F.W. Bond
Current version:
Release date: 1985
First released: 1975	IGWMC Check-date: 06/93
Institution of Model Development: Battelle Pacific Northwest
Laboratories, Environm. Sciences Div.
P.O. Box 999, Richland, WA 99352
Code Custodian: Cole, C.R.
Battelle Pacific NW Laboratories, Water and land
Resources Div.
P.O. Box 999, Richland, WA 99352
Model Developed for: research, general use, education
Documentation: theory, user's guide, examples, program structure,
code listing, verification
Model Testing: benchmarking (analyt. solutions), filed testing,
code intercomparison
Peer Review: concepts, theory, documentation
Availability: public domain, source code
Computer Requirements: compiler
Abstract:
FE3DGW is a finite element model for transient or steady'state, fully or
quasi-three-dimensional simulation of flow in a large multi-layered
groundwater basin. The code offers a wide choice of in specifying
boundary conditions like prescribed heads, nodal injection or withdrawal,
constant or spatially varying infiltration rates, and elemental sources or
sinks. Support programs are included to plot the finite element grid,
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contour maps of input and output parameters, and vertical cross-sections.
Also, there are support programs available for determining groundwater
pathlines and travel times from a specified point.
Remarks:
The program FE3DGW is briefly discussed in: Thomas, S.D., B. Ross, J.W.
Mercer, 1982. A Summary of Repository Siting Models. NUREG/CR-2782,
U.S. Nuclear Regulatory Commission, Washington, D.C.
The FE3DGW code has been used as flow module in the CFEST groundwater flow
and solute and heat transport simulator. (see IGWMC Key # 2070; Gupta et
Al. 1987; see references).
Supporting software has been developed at Pacific NW Laboratory, Richland,
Washington for interactive graphic computation and result display.
IGWMC Key: 2080 Model name: GETOUT
Model category: solute transport
Authors: Burkholder, H.C., M.O. Cloninger, W.V. Dernier, P.J. Lidell, and
G. Jansen
Current version:
Release date: 1983
First released: 1975	IGWMC Check-date: 11/93
Institution of Model Development; Battelle Pacific Northwest
Laboratories, Environm. Sciences Div,
P.O. Box 999, Richland, WA 99352
Code Custodian: Battelle Pacific NW Laboratories, Land and Water
Resources Div., P.O. Box 999, Richland, WA 99352
Model Developed for: research, general use
Documentation: theory, user's guide, examples, code listing,
verification
Model Testing: verification
Peer Review: concepts, theory, coding, accuracy, documentation
Availability: restricted non-proprietary, source code
Computer Requirements: compiler
Abstract:
The GETOUT code is a set of programs that model the migration of
radionuclides from an underground source to a body of water at the
surface. It is based on one-dimensional analytical solutions to describe
the migration of a series of single radionuclides, and 2- and 3-member
radionuclide chains. The model solves the advective-dispersive solute
transport equation, assuming an interstitial velocity invariant in space
and time. It handles linear equilibrium sorption and first-order decay.
Impulse release and/or band release from the source can be handled. The
output consists of: 1) a breakthrough curve for specified radionuclides,
and 2) a summary of discharge rates.
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Remarks:
The original code was developed at Battelle Pacific NW Laboratory. The
present version is by INTERA Environmental Consultants, Inc. (1983; see
references)
The GETOUT model is discussed in: Thomas, S.D., B. Ross, J.W. Mercer.
1982. A Summary of Repository Siting Models. NUREG/CR-2782, U.S. Nuclear
Regulatory Commission, Washington, D.C.
IGWMC Key: 2140 Model name: SWSOR
Model category: fresh/salt water flow
Authors: Mercer,	J.W., S.P. Larson and C.R. Faust
Current version:
Release date:	1980
First released:	1980	IGWMC Check-date: 09/90
Institution of Model Development: U.S. Geological Survey, Water Resources
Div.
432 National Center, Reston, VA 22092
Code Custodian: GeoTrans, Inc.
46050 Manekin Plaza, Suite 100, Sterling, VA 22170
Model Developed for: research, general use, education
Documentation: theory, user's guide, examples, program structure,
code listing, verification
Model Testing: verification (analytical solutions), laboratory tests
Peer Review: concepts, theory, documentation
Availability: public domain, source code
Computer Requirements: compiler
Abstract:
SWSOR is a finite difference model for simulation of unsteady flow of both
salt and fresh water separated by a sharp interface in an anisotropic
heterogeneous aquifer. The partial differential equations are integrated
over the thicknesses of the fresh and salt water resulting in two
equations (with fresh-water head and salt-water head as respective
dependent variable) describing the two-dimensional areal flow
characteristics in the model domain. The resulting nonlinear equations
are linearized and solved using an iterative method. The model can handle
water-table conditions or confined conditions with steady-state leakage of
fresh water. Pumping wells may penetrate both water zones; the model will
approximate the relative amounts of each fluid that are discharged
dependent on open screen interval exposed to each fluid.
IGWMC Key: 2550 Model name: SWATR-CROPR/SWACROP
Model category: unsaturated flow
Authors: Wesseling, J.G., P. Kabat, B.J. van den Broek, and R.A. Feddes
Current version; 2.02
Release date: 12/92
First released: 1978	IGWMC Check-date: 06/93
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Institution of Model Development: Winand Staring Centre, Dept. of
Agrohydrology, Wager.ingen, The
Netherlands
Code Custodian: Winand Staring Centre, Dept. of Agrohydrology
P.O. Box 125, 6700 AC Wageningen, The Netherlands
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
research, general use
theory, user's guide, examples
laboratory data sets, field testing
con c ep t s, theory
restricted non-proprietary, source code, compiled
(PC)
IBM PC/AT, 640 Kb RAM, DOS 3.0, CGA; compiler for
versions on other platforms
Abstract:
SWACROP (Soil WAter and CROP production model) simulates transient
one-dimensional flow in the unsaturated zone. The soil profile is divided
into several layers (containing one or more compartments of variable
thickness) having different physical properties. The governing equation
is solved using an implicit finite difference scheme. For the hydraulic
conductivity and soil water capacity an explicit linearization scheme is
used. The resulting system of equations is solved using the Thomas
algorithm. At each (variable) time step a complete water balance is
provided. The model includes a crop growth submodel and allows for plant
uptake. For the top boundary, data on rainfall, potential soil
evaporation, and potential transpiration of the crop is required. When
the soil remains unsaturated, the bottom b.c. may be pressure head, zero
flux, or free drainage. For saturated conditions bottom b.c.'s may take
the form of given head or flux.
IGWMC Key: 2580 Model name: SHAFT79 (Simultaneous Heat And Fluid
Transport)
Model category: water/steam flow, heat transport
Authors: Pruess,	K., and R.C. Schroeder
Current version:
Release date:	1980
First released:	1980	IGWMC Check-date: 11/90
Institution of Model Development: Lawrence Berkeley Lab., Earth Sc. Div.
Univ. of California, Berkeley, CA 94720
Code Custodian: Pruess K.
Lawrence Berkeley Lab., Earth Sc. Div.
M.S. 50E LBL, 1 Cyclotron Road, Berkeley, CA 94720
Model Developed for:	research, general use, education
Documentation:	theory, user's guide, examples, code listing,
verification
Model Testing:	verification, field datasets
Peer Review:	concepts, theory
Availability:	restricted non-proprietary, source code
Computer Requirements;	compiler
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Abstract:
SHAFT79 is a two-phase geothermal reservoir simulator. It uses the
integrated finite difference technique for transient simulation of
simultaneous three-dimensional heat and fluid transport in porous media.
The model handles condensation, heat convection, heat conduction and phase
changes. SHAFT79 solves coupled mass and energy balance equations for a
system of porous rock saturated with one-component fluid in liquid and
vapor form. All rock properties except porosity, are independent of
temperature, pressure, or vapor saturation; liquid, vapor, and rock matrix
are at the same temperature and pressure at all times. Capillary pressure
is neglected. The non-linear finite difference equations are solved using
the Newton -Raphson method.
Remarks:
The program is briefly discussed in: Thomas, S.D., B. Ross, J.W. Mercer.
1982. A Summary of Repository Siting Models. NUREG/CR-2782, U.S. Nuclear
Regulatory Commission, Washington, D.C.
An automatic mesh generator for the SHAFT?9 and MULKOM codes has been
published by Pruess {1983,* see references).
IGWMC Key: 2582 Model name: T0UGH/T0UGH2 (Transport of Unsaturated
Groundwater and Heat)
Model category: unsaturated flow, water/steam flow, vapor flow/transport,
heat transport, porous medium, fractures
Authors: Pruess, K., Y.W. Tsang, and J.S.Y. Wang
Current version:
Release date: 1987
First released: 1984	IGWMC Check-date: 07/92
Institution of Model Development: Lawrence Berkeley Lab., Earth Sc. Div.
Univ. of California, Berkeley, CA 94720
Code Custodian: Pruess K.
Lawrence Berkeley Lab., Earth Sc. Div.
M.S. 50E LBL, 1 Cyclotron Road, Berkeley, CA 94720
Model Developed for: research, general use
Documentation: theory, user's guide, examples, program structure,
code listing, verification
Model Testing: verification, lab. datasets
Peer Review: concepts, theory, documentation
Availability:	restricted non-proprietary, source code
Computer Requirements:	compiler
Abstract:
TOUGH is a multi-dimensional integral finite difference model for
transient simulation of the strongly coupled transport of water, air,
vapor and heat in anisotropic fractured and porous media. The
interference between phases is represented by relative permeability
functions. The model includes convection, condensation, capillary forces,
evapotranspiration, heat conduction (with moisture dependent thermal
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conductivity) arid diffusion, change of phase, adsorption, fluid
compression, dissolution of air in liquid, and buoyancy. Thermophysical
properties of liquid water and vapor are obtained from steam table
equations. Time is discretized fully implicitly. The TOUGH code includes
a library of commonly used functions for the capillary pressure-relative
permeability relationships. The model handles a variety of boundary
conditions. T0UGH2 handles different fluid mixtures (water and water with
tracer; water and C02; water and air) .
Remarks:
To evaluate how hysteretic capillary pressure-liquid saturation relation
may effect the flow and liquid saturation distribution in a fractured rock
system, Niemi and Bodvarsson (1988) included capillary hysteresis in the
numerical flow simulator TOUGH (see references). Material properties used
for these evaluations represent the densely welded tuff of the Yucca
Mountain site in Nevada.
TOUGH was tested by Sandia National Labs and results were compared to
analytical solutions, laboratory data sets, and the programs NORXA and
PETR03. TOUGH was capable of solving most problems and out-performed the
other codes. However, it had the most difficulty with numerical
dispersion. TOUGH'S greatest weakness is the way it handles boundary
conditions especially when boundary conditions are mixed in the form of
prescribed mass flux and constant temperature (or similar conditions).
The codes UNSAT2, BIM2D/3D, TRUST, FEMWATER, TOUGH, SUTRA, SATURN,
TRACR3D, and FLAMINGO are described and compared in: Yeh, T.C., T.C.
Rasmussen and D.D. Evans. 1988. Simulation of Liquid and Vapor Movement
in Unsaturated Fractured Rock at the Apache Leap Tuff Site; Models and
Strategies. NUREG/CR-5097, U.S. Nuclear Regulatory Commission,
Washington, D.C. This report includes a detailed description of the code
characteristics and evaluates their applicability based on governing
equations and code options.
Relative permeability must be input as an analytical function. The user
is given a choice of a linear function, "Corey's curves", "Grant's
curves", Fatt and Kilikoff functions, Sandia Functions, or Verma
functions. Capillary pressure functions must also be input as analytical
functions. The user may specify a linear function, Pickens function, TRUST
capillary pressure function, Milly's function, Leverett's function, or the
Sandia function.
A fracture network generator based on the MINC concept is available for
TOUGH (see Pruess, 1983} .
IGWMC Key: 2610 Model name: PHREEQE
Model category: hydrogeochemical
Authors: Parkhurst, D.L., D.C. Thorstenson, and L.N. Plummer
Current version: 2.1
Release date: 5/93
First released: 1980	IGWMC Check-date: 07/94
Institution of Model Development: U.S. Geological Survey, Water Resources
Div. National Center, Reston, VA 22092
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Code Custodian:
Parkhurst, D.L.
U.S. Geological Survey, Water Resources Div.
418 Federal Center, Lakewood, CO 80225
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
research, general use
theory, user's guide, examples, program structure,
code listing, verification
verification, lab. datasets, code intercomparison
concepts, theory, coding, documentation
public domain, source code, compiled (PC) version
IBM PC/AT, 640 Kb RAM, C6A, math coprocessor;
compiler for versions on other platforms
Abstract:
PHREEQE is an equilibrium geochemical speciation and reaction path model
that calculates mass transfer as a function of stepwise temperature change
or dissolution. Based on an ion-pairing aqueous model, PHREEQE can
calculate pH, redox potential, and mass transfer as a function of reaction
progress. The original version included redox reactions and ion exchange
for 19 elements, 120 aqueous species, 3 gases, 21 minerals. A series of
coupled chemical equations are solved iteratively to yield the following:
pH, Eh, total concentration of elements, amount of minerals (or other
phases) transferred into or out of the aqueous phase, distribution of
aqueous species, and the saturation state of the aqueous phase with respect
to specified mineral phases.
Remarks:
An interactive preprocessor is available. This program is documented in:
Fleming, G.W. and L.N. Plummer. 1983. PHRQINPT - An Interactive Computer
Program for Constructing Input Data Sets to the Geochemical Simulation
Program PHREEQE. Water-Resources Investigations Report 83-4236, U.S.
Geological Survey, Reston, Virginia.
There are two versions of the PHREEQE program in the public domain. The
two versions differ slightly. One version is available from the U.S.
Geological Survey (contact Neil Plummer; see authors); the other version
is available from Battelle's Office of Nuclear Waste Isolation, Columbus,
Ohio.
IGWMC Key: 2611 Model name: PHRQPITZ
Model category; hydrogeochemical
Authors: Plummer, L.N., D.L. Parkhurst, G.W. Fleming, and S.A. Dunkle
Current version: 1.02
Release date; 5/93
First released: 1988	IGWMC Check-date: 06/93
Institution of Model Development: U.S. Geological Survey, Water Resources
Div., National Center, Reston, VA 22092
Code Custodian: Plummer, L.N.
U.S. Geological Survey, water Resources Div.
432 National Center, Reston, VA 22092
Model Developed for: general use
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Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
theory, user's guide, examples, program structure,
code listing, verification
1ab. datasets
concepts, theory, documentation
public domain, source code, compiled (PC) version
compiler
Abstract:
PHRQPITZ is a code capable of making geochemical calculations in brines
and other electrolyte solutions to high concentrations using Pitzer virial
coefficient approach for activity-coefficient corrections.
Reaction-modeling capabilities include calculation of 1) aqueous
speciation and mineral saturation index, 2) mineral solubility, 3) mixing
and titration of aqueous solutions, 4} irreversible reactions and
mineral-water mass transfer, and 5) reaction path. The computed results
for each aqueous solution include the osmotic coefficient, water activity,
mineral saturation indices, mean and total activity coefficients, and
scale-dependent values of pH, individual - ion activities, and
individual- ion activity coefficients, A data-base of Pitzer interaction
parameters is provided at 25 °C for the system:
Na - K -Mg - Ca - H - C1 - SO. - OK - HC03 - C03 - C02 - H20, and extended to include largely
untested literature data for Fe (II), Mn (II), Sr, Ba, Li, and Br with
provision for calculations at temperatures other than 25 °C. An extensive
literature review of published Pitzer interaction parameters for many
inorganic salts is given. An interactive input code for PHRQPITZ is also
included.
Remarks:
The PHRQPITZ code has been adapted from the USGS code PHREEQE by replacing
the aqueous model with the Pitzer virial coefficient approach. The
PHRQPITZ code contains most of the reaction-modeling capabilities of the
original PHREEQE code. As with PHREEQE, the aqueous model and the
thermodynamic data of PHRQPITZ are user-definable and external to the
code.
IGKMC Key: 2620 Model name: MARIAH
Model category: saturated flow, heat transport
Authors: Gartling, D.K., and C.E. Hickox
Current version:
Release date: 1980
First' released: 1980	IGWMC Check-date: 10/91
Institution of Model Development: Sandia Nat. Lab., Fluid Mech. & Heat
Transfer Div.
Albuquerque, New Mexico 87185
Code Custodian: Gartling, D.K.
Sandia Nat. Laboratories, Fluid Mech. and Heat Transfer
Div., Albuquerque, NM 87185
Model Developed for: research, general use
Documentation: theory, user's guide, examples, program structure,
verification
Model Testing: verification
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Peer Reviews
Availability: public domain, source code
Computer Requirements; compiler
Abstract:
MARIAH is a finite element model to simulate steady or non-steady state
two-dimensional fluid flow in saturated porous media including the effects
of heat transfer. The specific types of flow problems for which MARIAH is
suitable include isothermal flows, forced convection, free convection, and
mixed convection. The porous matrix is considered homogeneous and rigid.
For non-isothermal flows, the fluid and matrix are assumed to be in
thermal equilibrium. Buoyancy driven flows are assumed to follow the
Boussinesq approximation. MARIAH is a self-contained analysis program
with its own mesh-generator, data analysis and plotting packages.
Remarks:
MARIAH is based on two earlier Sandia programs, the surface water code
NACHQS (designed for the two-dimensional analysis of viscous
incompressible fluid flows, including the effects of heat transfer) and
COYOTE (a program for heat conduction analysis). (see references).
IGWMC Key: 2630 Model name: AQUIFEM-1/AQUIFEM-N
Model category: saturated flow
Authors: Townley, L.R. , J.L. Wilson, and A.A.G. Sa da Costa
Current version:
Release date: 1989
First released: 1979	IGWMC Check-date: 01/93
Institution of Model Development: Mass. Inst, of Techn., R.M. Parsons
Laboratory for Water Resources and
Hydrodynamics
Cambridge, Massachusetts
Code Custodian: R.M. Parsons Lab. for Water Resources and Hydrodynamics
Dept. of Civil Eng., Mass. Inst, of Technology,
Cambridge, MA 02139 (original single-layer version; also
see remarks)
Model Developed for: research, general use
Documentation: theory, user's guide, examples, code listing,
verification
Model Testing: verification, lab. datasets, field datasets
Peer Review: concepts, theory
Availability: proprietary, purchase,* source code (main frame) ,
compiled (PC, Macint)
Computer Requirements: IBM PC/AT, 640 Kb RAM, CGA, math coprocessor;
Macintosh
Abstract:
AQUIFEM-1/AQUIFEM-N is a finite-element model for transient,
two-dimensional or quasi-three-dimensional groundwater flow in confined,
leaky-confined, or unconfined single or multi-layered aquifers. Later
versions allow for a wide variety of aquifer and boundary conditions and
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facilitate two-dimensional cross-sectional simulation, and simulation of
groundwater discharge into streams, simulation of springs, partial
penetrating wells and drains, and simulation of aquifer or aguitard
pinch-outs,
Remarks;
There are two models named AQUIFEM-N which are both extensions of the MIT
model AQUIFEM-1 developed in 1979. They handle both multi-layered aquifer
systems. One version of AQUIFER-N has been developed by Wilson, Riordan,
Screiber and Harley at Resource Analysis, Inc. in the late 1970's and was
the precursor to the DYNFLOW model of Camp, Dresser and McKee, Inc,
Boston, Mass., by the same authors. The other version of AQUIFEM-N has
been developed by L. Townley of CSIRO, Australia (see separate remark).
AQUIFEM-N is a multilayered version of AQUIFEM-1, developed by L. Townley
at CSIRO, Australia. It includes grid generation and node renumbering
programs, and allows plotting of grids, contours, flow lines, time series
and cross - sections. Versions are available for PCs, Macs, and
workstations. Contact: CSIRO Division of Water Resources, Private Bag, PO
Wembley, W,A. 6014, Australia
IGWMC Key.* 2631 Model name: SWIM {Salt Water Intrusion Model)
Model category: fresh/salt water flow
Authors: Sa da Costa,
Current version:
Release date: 1979
First released: 1979
A.A.G., and J.L. Wilson
IGWMC Check-date: 09/90
Institution of Model Developments
Mass. Inst, of Techn., R.M. Parsons
Lab. for Water Resources and
Hydrodynamics, Cambridge, Mass,
Code Custodian:
R.M. Parsons Lab. for Water Resources and Hydrodynamics
Dept. of Civil Eng., Mass. Inst, of Technology,
Cambridge, MA 02139 (original single-layer version; also
see remarks)
Model Developed for:
Document a t ion:
Peer Review:
Availability:
Computer Requirements:
research, general use
theory, user's guide, examples, program structure,
code listing, verification
Model Testing: verification (analytical solutions), sensitivity
analysis
concepts, mathematical framework, performance
public domain, source code
compiler
Abstract:
SWIM is a Galerkin finite element model with implicit time integration for
simulation of transient, horizontal flow of fresh and salt water separated
by a sharp interface. The resulting set of nonlinear equations are solved
using a modified Newton-Raphson iterative scheme together with Gauss
elimination. The model can handle heterogeneous, anisotropic leaky- and
nonleaky-confined or unconfined aquifer conditions. Constant or
time-varying boundary conditions are supported including specified
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piezometric head, specified flux and mixed boundary condition {sea
boundary, recharge through semi-confining layer}. The model can handle a
fresh water lens on top of a salt water, or fresh water over a salt water
wedge toe. Toe movement is represented using a fixed finite element grid
with a non-linear description of the parameters inside the elements
containing the toe.
IGWMC Key: 2640 Model name: FLOWQ3D/TRIAG
Model category: saturated flow
Authors: Mallory, M.J., and T.J. Durbin
Current version:
Release date: 1979
First released: 1976	IGWMC Check-date: 11/93
Institution of Model Development: U.S. Geological Survey, Water Resources
Div., Menlo Park, CA 94025
Code Custodian: Durbin, T.J.
Hydrologic Consultants, Inc.
1947 Galileo Ct., Davis, CA 95616
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
general use
theory, user's guide, examples, code listing
concepts, theory, documentation
public domain, source code
compiler
Abstract:
FL0WQ3D/TRIAG is a Galerkin finite element model for simulation of steady
and transient ground-water flow in an isotropic,, heterogeneous,
two-aquifer system with leakage through the separating confining layer.
The areal extent of the two aquifers do not have to coincide. Discharge
and recharge can be varied spatially and with time. Evapotranspiration is
treated as a linear function of depth to water. The model uses triangular
elements to discretize in space and a backwards finite difference
approximation for time. It supports specified head and flux boundary
conditions.
IGWMC Key: 2663 Model name: Variable Density Model
Model category: fresh/salt water flow
Authors: Kuiper,	L.K.
Current version:
Release date; 1984
First released:	1984	IGWMC Check-date: 10/90
Institution of Model Development: U.S. Geological Survey, Water Resources
Div., District Office, Austin, Texas
Code Custodian: Kuiper, L.K.
U.S. Geological Survey, Water Resources Div.
SW Tower, 3rd floor, 211 East 7th Street, Austin, TX 78701
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Model Developed for: general use
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
theory, user's guide, examples, program structure,
code listing
concepts, theory, documentation
public domain, source code
compiler
Abstract:
Kuiper's model is an integrated finite difference model for the simulation
of variable density, time dependent groundwater flow in three dimensions.
The governing equation is the three-dimensional transient flow equation
with fresh water head as dependent variable. The groundwater density,
although variable in space, is approximately constant in time and known.
The IFDM grid elements are rectangular when viewed from the vertical
direction, but their top and bottom surfaces follow the curvature of the
geologic strata. Solution methods employed are the line successive
over-relaxation method, the strongly implicit procedure, and a
preconditioned conjugate gradient method. Specified head, no-flow and
specified flux boundaries are supported as are wells, areal recharge and
head-dependent discharge (e.g., to a stream).
IG$MC Key: 269 0 Model name: RANDOM WALK /TRAJCS
Model category: saturated flow, solute transport
Authors: Pr1ekett, T.A.,	T.G. Naymk, and C.G. Lonnqux s t
Current version: 1.0
Release date: 7/81
First released: 1981	IGWMC Check-date: 11/92
Institution of Model Development: Illinois State Water Survey
Box 232, Orbana, 111xnois 61301
Code Custodian: Illinois State Water Survey
P.O. Box 5050, Sta. A, Urbana, IL 61820 (see remarks for
other distributors)
Model Developed for: research, general use, education
Documentation: theory, user's guide, examples, program structure,
code listing, verification
Model Testing: verification, code intercomparison
Peer Review: concepts, theory
Availability: public domain, source code, compiled (PC) version
Computer Requirements: IBM PC/AT, 640 Kb RAM, CGA, math coprocessor;
compiler for larger versions on other platforms
Abstract:
RANDOM WALK/TRANS is a numerical model to simulate two-dimensional steady
or transient flow and transport problems in heterogeneous anisotropic
aquifers under water table and/or confined or leaky confined conditions.
The model calculates heads, velocities and concentrations for transport
processes of advection, dispersion, diffusion, sorption and decay. Flow
is simulated using a finite difference approach and the resulting set of
equations is solved with the iterative alternating direction implicit
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method. Advective transport is solved with a particle-in-a-cell method,
while the dispersion is analyzed with the random walk method.
Random Walk includes options for time-varying purapage or injection by
wells, natural or artificial recharge, recharge from and discharge into
streams, water-table-depth-dependent evapotranspiration, conversion of
storage coefficients from artesian to water table conditions, and flow from
springs. The code also allows specification of chemical constituent
concentrations in any segment of the model as initial condition.
Furthermore, it allows introduction of chemical mass at any location
in the model.
Remarks:
MODELCAD is a graphical oriented, model-independent pre-processor to
prepare and edit input files for two- and three-dimensional groundwater
models, including aquifer properties, boundary conditions, and grid
dimensions. The program prepares input files for MODFLOW, MOC, PLASM and
RANDOM WALK, among others. File formatting routines for other models are
available upon request. (see IGWMC Key # 6690)
Original Code is available from; Director of Computer Service,
Illinois State Water Survey, Box 5050, Station A, Champaign, IL 61820.
A modified version of PLASM and RANDOM WALK to analyze hydrologic impacts
of mining is documented in U.S. Office of Surface Mining (1981; see user
references).
IGWMC Key: 2691 Model name: RAND3D
Model category: solute transport
Authors: Koch, D.H, and T.A. Prickett
Current version:
Release date: 1993
First released:	IGWMC Check-date: 02/93
Institution of Model Development: Engineering Technologies Associates,
Inc.
Ellicott City, Maryland
Code Custodian: Koch, D.H.
Engineering Technologies Associates, Inc.
3458 Ellicott Center Drive, #101, Ellicot City, MD 21043
Model Developed for: general use
Documentation: theory, user's guide, examples
Model Testing:
Peer Review: concepts, theory
Availability: public domain, compiled (PC) version
Computer Requirements: IBM PC/AT, 640 Kb RAM, math coprocessor, VGA
Abstract:
RAND3D is an interactive three-dimensional advective-dispersive solute
transport model utilizing the random-walk particle tracking algorithm.
The model calculates horizontal advective transport based on a four point
interpolation of the velocity vectors. Calculation of vertical transport
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is based on linear interpolation between the input vertical velocity
vectors at the top and bottom of each model layer. RAND3D includes zero
and first-order production/decay and linear, reversible adsorption
(retardation). It calculates concentration distributions and solute
concentration exiting the model at a sink. Transient flow simulations may
be simulated by inputting a series of velocity 'files. A preprocessor,
PREM0D3D, is available to use the output of MODFLOW as input and to create
velocity vectors for the RAND3D model. The program support on screen
graphics representing site features and superposed plume movement.
IGWMC Key: 2720 Model name: INTERFACE
Model category: fresh/salt water flow
Authors: Page, R.H,
Current version;
Release date: 12/79
First released: 1976	IGWMC Check-date: 09/90
Institution of Model Development: Princeton Univ., Dept. of Civil Eng.,
Water Resources Program
Princeton, NJ 08540
Code Custodian; Princeton Univ., Water Resources Program, Dept. of Civil
Eng., Princeton, NJ 08540
Model Developed for:
Documen t a t i on:
research, general use
theory, user's guide, examples, program structure,
code listing, verification
Model Testing: verification
Peer Review: concepts, theory
public domain, source code
compiler
Availability:
Computer Requirements;
Abstract:
INTERFACE is a finite element model to simulate transient flow of fresh
and saline water as immiscible fluids separated by a sharp interface in an
isotropic, heterogeneous, water table aquifer. The model can handle both
confined and unconfined aquifers. The flow equations for the two fluids
are coupled by assuming equality of pressures on either side of the
interface.
IGWMC Key: 2740 Model name: NMFD-3D
Model category: saturated flow
Authors; Posson,	D.R., G.A. Hearne, J.V. Tracy, and P.F. Frenzel
Current version:
Release date:	3/80
First released:	1980	IGWMC Check-date: 12/91
Institution of Model Development: U.S. Geological Survey, Water Resources
Div., Albuquerque, NM 87125
Code Custodian: Posson, D.R,
U.S. Geological Survey, Water Resources Div.
P.O. Box 26659, Albuquerque, NM 87125
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Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
general use
theory, user's guide, examples,
code listing, verification
verification
concepts, theory, documentation
public domain, source code
compiler
program structure,
Abstract:
NMFD-3D (New Mexico Finite Difference 3-Dimensional Model) simulates
non-steady state two-dimensional horizontal or fully-three-dimensional
groundwater flow in multi-layered heterogeneous, anisotropic aquifer
systems or three-dimensional saturated groundwater flow. The model
includes a combined closed form/numerical approximation for transient
leakage from confining beds and allows for both confined and water table
conditions.
Remarks;
An expanded and updated version of this model has been published in Hearne
(1981) see user references. Changes as of January 1981 include: 1)
treatment of head-dependent boundaries and specified flow boundaries, and
2 5 code which executes on the Cray-1 vector computer. The reference
provides instructions for compiling and executing the computer program on
a Cray-*.
This program is an extensively modified version of the two-dimensional
flow model of Trescott el al (1976; IGWMC key 0771), and the
three-dimensional flow model of Trescott and Larson (1975; IGWMC Key 0770).
IGWMC Key: 2760 Model name: MUSHRM
Model category: water/steam flow, heat transport
Authors: Pritchett, J.W.
Current version:
Release date: 1980
First released: 1980	IGWMC Check-date: 09/90
Institution of Model Development: Systems, Science and Software
P.O. Box 1620, La Jolla, CA 92038
Code Custodian; Pritchett, J.W.
Systems, Science and Software
P.O. Box 1620, La Jolla, CA 92038
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
research, general use
theory, user's guide, examples, program structure,
code listing, verification
verification
concepts, theory
proprietary, license; source code
compiler
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Abstract:
MUSHRM is a hydrothermal finite difference reservoir model to simulate
unsteady multi-phase fluid and heat flow in multi-dimensional geometries
including 3-D. The program handles convection, conduction, change of
phase and degassing phenomena.
IGWMC Key: 2761 Model name: CHARGE.
Model category: water/steam flow, vapor flow/transport, heat transport,
deformation
Authors: Pritchett, J.W.
Current version:
Release date: 1980
First released: 1980	IGWMC Check-date: 09/90
Institution of Model Development: Systems, Science and Software
P.O. Box 1620, La Jolla, CA 92038
Code Custodian: Pritchett, J.W.
Systems, Science and Software
P.O. Box 1620, La Jolla, CA 92038
Model Developed for:
Documentati on:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
research, general use
theory, user's guide, examples, program structure,
code listing, verification
verification
concepts, theory
restricted non-proprietary, source code
compiler
Abstract:
CHARGR is a three-dimensional multi-phase compressible liquid simulator
for transient, multi-phase fluid flow with dissolved incondensable gases,
and heat transport in anisotropic, heterogeneous deformable porous media.
It uses the finite difference method to predict pressures and
temperatures. The equation are solved using LSOR and IADI solvers.
IGWMC Key: 27 70 Model name: CONFLOW
Model category: saturated flow
Authors: Hertel,	E.S., Jr.
Current version:
Release date:	1981
First released: 1981	IGWMC Check-date: 10/90
Institution of Model Development: The Dikewood Corporation
Albuquerque, New Mexico
Code Custodian: Hertel, E.S., Jr.
Sandia Nat. Laboratories
Albuquerque, NM 87185
Model Developed for: general use
Documentation: theory, user's guide, examples, code listing
Model Testing:
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Peer Review;
Availability: public domain, source code
Computer Requirements: compiler, DISSPLA graphics library, RSCORS
Abstract:
The computer code CONFLOW describes fluid flow between two wells in a
confined homogeneous, isotropic region. The code uses superposition to
solve Laplace's equation with impermeable boundaries and can assist in the
design of flow experiments in geologic media. CONFLOW's output is a plot
of the theoretical streamlines, the ratio between the time of first
arrival for the confined region and the time of first arrival for
unconfined two-well flow, and a value for the pressure drop function.
IGWMC Key: 2791 Model name: CRREL (Flow Lines Program)
Model category: saturated flow
Authors; Daly, C.J.
Current version:
Release date: 4/84
First released: 1984	IGWMC Check-date: 10/90
Institution of Model Development: U.S. Army Corps of Engineers, Cold
Regions Res. & Eng. Lab.
Hanover, NH 03755
Code Custodian: Reynolds, R.
Cold Regions Res. & Eng. Lab., U.S. Army Corps of
Engineers, Hanover, NH 03755
Model Developed for:	research, general use
Documentation:	theory, user's guide, examples, code listing
Model Testing:
Peer Review:
Availability:	public domain, source code
Computer Requirements:	compiler
Abstract:
CRREL is an analytical model to calculate and plot streamlines for flow in
anisotropic, heterogeneous aquifers based on known head distribution.
The code CRREL consists of three subprograms: CREATE (Splines), FG
(Velocities) and MAIN (Flowlines), and various subroutines.
IGWMC Key: 2800 Model name: SGMP
Model category: saturated flow
Authors: Boonstra, J., and N.A. De Ridder
Current version:
Release date: 6/81
First released: 1981	IGWMC Check-date: 12/91
Institution of Model Development: Internat. Institute for Land,
Reclamation and Improvement (ILRI)
P.O. Box 45, 6700 AA Wageningen, The
Netherlands
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Code Custodian: Boonstra, J.
Internat. Inst, for Land Reclamation and Improvement
P.O. Box 45, 6700 AA Wageningen, The Netherlands
Model Developed for: research, general use
Documentation; theory, user's guide, examples, code listing
Model Testing:
Peer Review:
Availability: proprietary, purchase,* source code
Computer Requirements: compiler
Abstract:
SGMP is a polygon-based, integrated finite difference model for simulating
steady-state or transient, two-dimensional, horizontal flow in a
saturated, anisotropic and heterogeneous, confined, semi-confined or
phreatic aquifer. It supports fixed head, no-flow and fixed flow-rate
boundary conditions as well as leakage from and into streams.
IGWMC Key: 2801 Model name: SATEM (Selected Aquifer Test Evaluation
Methods!
Model category: aquifer test analysis
Authors: Boonstra, J.
Current version: 1.0
Release date: 10/89
First released: 1989	IGWMC Check-date: 12/90
Institution of Model Development: Internat. Institute for Land,
Reclamation and Improvement {ILRI)
Wageningen, The Netherlands
Code Custodian: Boonstra, J.
Internat. Inst, for Land Reclamation and Improvement
P.O. Box 45, 6700 AA Wageningen, The Netherlands
Model Developed for: research, general use, education
Documentation: theory, user's guide, examples
Model Testing;
Peer Review: concepts, theory, documentation
Availability: proprietary, purchase? compiled (PC) version
Computer Requirements: IBM PC/AT, DOS 2.0, 640 Kb RAM, CGA/EGA/VGA/Hercules
Abstract:
SATEM is a set of four microcomputer programs for analysis of aquifer
tests in unconsolidated, confined, leaky confined or phreatic aquifers.
These programs are: JACOB, HANTUSH, PARTIAL, and RECOVERY. For aquifers
under fully confined or unconfined conditions SATEM allows for partial
penetrating wells. SATEM has been designed to provide quick evaluation of
the field data by using diagnostic plots, a method well-suited for
sensitivity analysis. It can evaluate the drawdown data observed during
pumping and residual drawdown data observed during recovery. The field
data can be taken from observation and/or from the pumping well itself.
SATEM includes a program for inputting field data and a program to set up
hypothetical single well aquifer test data for instructional purposes.
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IGWMC Key: 2 810 Model name: WASTE/NUTRAN
Model category: solute transport, stochastic simulation
Authors; Ross, B., and C.M. Koplik
Current version:
Release date: 10/81
First released: 1978	IGWMC Check-date: 12/92
Institution of Model Development: Analytic Sciences Corp., Energy and
Env. Div., Reading, MA 01867
Code Custodian: Analytic Sciences Corporation, Energy & Bnvironm, Div.
One Jacob Way, Reading, MA 01867
Model Developed for:	research, general use
Documentation:	theory, user's guide, examples, code listing,
verification
Model Testing:	verification
Peer Review:	concepts, theory
Availability:	proprietary, purchase; source code
Computer Requirements:	compiler
Abstract:
WASTE is an analytical solution to compute one- or two-dimensional
horizontal, or one-dimensional vertical, steady or unsteady transport of
radionuclides in confined or semi^confined, anisotropic, heterogeneous,
multi-aquifer systems. The model includes adveotion, dispersion,
diffusion, linear adsorption, equilibrium ion exchange and radioactive
decay. It is part of the NUTRAN package for calculation of doses to
humans from radionuclides carried out of deep geologic waste repositories
by g roundwa t e r.
Remarks:
The WASTE program is part of the NUTRAN package for calculation of doses
to humans from radionuclides carried out of deep geologic waste
repositories by groundwater. The NUTRAN package includes also ORIGIN
developed by Oak Ridge National Laboratory, Tennessee, which treats the
formation and (chain) decay of radionuclides, BIODOSE which calculates
radionuclide transport in ecosystems, and PLOT which combines the results
of WASTE and BIODOSE into fully formatted outputs.
IGWMC Key: 283D Model name: GWTHERM/EP21
Model category: saturated flow, solute transport, heat transport
Authors: Runchal, A., J. Treger, and G. Segol
Current version:
Release date: 1979
First released: 1979	IGWMC Check-date: 11/90
Institution of Model Development: Dames and Moore - Advanced Technology
Group, Los Angeles, California
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Code Custodian: Dames and Moore, Advanced Technology Group
1100 Glendon Avenue - Suite 1000, Los Angeles, CA 90024
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements*.
general use
theory, user's guide,
verification
examples, verification
proprietary,
compiler
license? source code
Abstract:
GWTHERM is a two-dimensional integrated finite difference model for areal,
cross-sectional or radial symmetric simulation of steady-state or
transient fluid flow and heat and solute transport in an anisotropic,
heterogeneous, water table aquifer with density- and temperature-dependent
fluid properties. Transport processes of advection, dispersion, diffusion,
sorption and decay are simulated. The program calculates pressure,
velocity, temperature and mass concentration at every time step at each
grid cell. Thermal conductivity, heat capacity, permeability, density,
viscosity, retardation factor, and porosity values over the entire grid
may be calculated and displayed. The code contains a particle-tracking
option.
IGWMC Key: 287 0 Model name: DISIFLAQ
Model category: saturated flow
Authors: Berney, 0.
Current version:
Release date: 1980
First released: 1969	IGWMC Check-date: 10/90
Institution of Model Development: Land and Water Development Div., U.N.
Food and Agric. Organ, (FAO)
Rome, Italy
Code Custodian: Thomas, R.G.
Land and Water Developm. Div., U.N. F.A.O.
Via Delle Terme Di Caracalla, 00100-Rome, Italy
Model Developed for:	general use
Documentation:	theory, user's guide, examples, code listing
Model Testing:
Peer Review-,	concepts, theory
Availability:	public domain, source code
Computer Requirements:	compiler
Abstract:
DISIFLAQ (Digital Simulation of FLow through a 2-layer AQuifer system) is
a polygon-based finite difference model for steady-state or transient
simulation of two-dimensional, horizontal groundwater flow in a one- or
two-layer, isotropic, heterogeneous aquifer system. The model computes
the position of the piezometric surface of the aquifer(s), the
distribution of flux rates within the aquifers and across the leaky
confining layer between or above the aquifers, the flux rates across the
boundaries (springs, streams, etc.), and the distribution of storage
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changes in the aquifer(s). Also, the program computes the piezometric
head variations in time for any point and aquifer.
IGWMC Key: 2880 Model name: GWHEAD
Model category: saturated flow
Authors: Beckmeyer, R.R.,
Current version:
Release date: 1980
First released: 1980
R.W. Root, and K.R. Routt
IGWMC check-date: 04/92
Institution of Model Development: Savannah River Lab,
Aiken, South Carolina
Code Custodian:
Code custodian
Savannah River Lab.
Aiken, SC 29808
Waste Disposal Technology Div.
Model Developed for:
Documentation:
general use
theory, verification
Model Testing: verification
Peer Review: concepts, theory
Availability: public domain, source code
compiler
Computer Requirements;
Abstract:
GWHEAD is a computer code for simulating transient three-dimensional
groundwater flow in an anisotropic, spatially heterogeneous aquifer. The
model solves the finite difference approximations using the strongly
implicit solution procedure. The boundaries either may permit flow across
them or may be impermeable. The top boundary represents the water table
and its location is a function of the dependent head variable. Across
this boundary the model allows vertical accretion (recharge). The code
has been used to model leaky confined groundwater conditions and spherical
flow to a continuous point sink, both of which have exact analytical
solutions.
Remarks:
GWHEAD is one of a series of codes together forming SRL's JOSHUA system.
The groundwater subsystem, called GWATS {Ground Water And Transport
Subsystem), consists of-three modules: GWHEAD, VELO, and TRANS. VELO
computes the groundwater velocity field using the hydraulic heads computed
by GWHEAD. TRANS is the solute transport component in the GWATS.
IGWMC Key: 289 0 Model name: SEEPV
Model category: unsaturated flow
Authors: Davis, L.A.
Current version:
Release date: 1980
First released: 1980	IGWMC Check-date: 12/90
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Institution of Model Development: Water, Waste and Land, Inc.
Fort Collins, CO 80524
Code Custodian: Davis, L.A.
Water, Waste and Land, Inc.
2629 Redwing Road, Suite 200, Fort Collins, CO 80526
Model Developed for: general use
Documentation: theory, user's'guide, code listing, verification
Model Testing: verification
Peer Review: concepts, theory-
Availability: public domain, source code
Computer Requirements • compiler
Abstract:
SEEPV is a finite difference model capable of simulating vertical seepage
{one-dimensional partially-saturated flow) from a tailings impoundment,
ground-water response beneath the impoundment (two-dimensional horizontal
flow), and the effects of previous seepage on the calculation of the
subsequent seepage rate. The model allows for spatial variations of
hydraulic properties, complex impoundment geometry, and arbitrary initial
conditions. The model can be used for estimating seepage rates from
impoundments• It takes into consideration the interaction between an
impoundment liner with the underlying aquifer.
IGWMC Key: 2 891 Model name: GS2
Model category: unsaturated flow, solute transport
Authors: Segol, G., G.F. Pinder, and E.O. Frind
Current version:
Release date: 1985
First released: 1976	IGWMC Check-date: 11/92
Institution of Model Development: Princeton Univ., Dept. of Civil Eng.,
Water Resources Program
Princeton, New Jersey 08540
Code Custodian: Davis, L.A.
Water, Waste and Land, Inc.
2629 Redwing Road, Suite 200, Fort Collins, CO 80526
Model Developed for: research, general use
Documentation: theory, user1s guide, examples, code listing,
verification
Model Testing: verification, lab. tests
Peer Review: concepts, theory, documentation
Availability: public domain, source code
Computer Requirements: compiler, IMSL math library
Ab s t r a c t:
GS2 is a two-dimensional Galerkin finite element code for the analysis of
flow and contaminant transport in partially saturated media. Either
vertical or horizontal plane simulation is possible. The transport
equation includes convection, dispersion, radioactive decay, linear
equilibrium adsorption (retardation) and a source/sink term. Boundary
conditions for flow may include constant head and constant flux as well as
infiltration and evaporation. For transport, boundary conditions may be
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speci.fxed as constant concentra1xon. our const3nt mass £lux• Xnfxltration
and evaporation may occur intermittently. Boundary condition may be
non-linear. An iterative procedure is used to determine type of boundary
condition at a seepage face boundary and the 1 ength of the seepage face.
Remarks:
The models GS2 and GS3 are documented in a single report (see references).
GS2 is the two-dimensional version and GS3 is designed for the analysis
of three-dimensional problems.
The relationship between hydraulic conductivity and moisture content in
GS2 and GS3 is provided in the form of tables from which the program
estimates values through linear interpolation. The models use
quadrilateral elements with linear basis functions. The programs also
handle isoparametric elements with quadratic or cubic basis functions.
IGWMC Key: 2892 Model name: GS3
Model category: unsaturated flow, solute transport
Authors: Segol, G., G.F. Pinder, and E.O. Frind
Current version:
Release date: 1985
First released: 1976	IGWMC Check-date: 11/92
Institution of Model Development: Princeton Univ., Dept. of Civil Eng.,
Water Resources Program
Princeton, New Jersey 08540
Code Custodian: Davis, L.A.
Water, Waste and Land, Inc.
2629 Redwing Road, Suite 200, Fort Collins, CO 80526
Model Developed for: research, general use
Documentation: theory, user's guide, examples, code listing,
verification
Model Testing: verification
Peer Review: concepts, theory, documentation
Availability: public domain, source code
Computer Requirements: compiler, IMSL math library
Abstract:
GS3 is a three-dimensional Galerkin finite element code for analysis of
fluid flow and advective-dispersive (nonconservative) contaminant
transport in partially saturated media. The transport equation includes a
source/sink term and retardation and decay processes. The code is
particularly useful for simulation of anisotropic systems with strata of
varying thickness and continuity. GS3 contains many of the same features
as UNSAT2 such as the ability to simulate mixed Dirichlet and Neuman for
flow and mass transport (concentration of waste leaving the system through
evaporated water is zero) by specifying minimum surface pressure and
maximum infiltration rate, and seepage faces. However, it will not
simulate evapotranspiration by defining a root zone and corresponding
plant species data. Unsaturated hydraulic properties are input in table
form (no hysteresis).
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Remarks:
The relationship between hydraulic conductivity and moisture content in
GS2 and GS3 is provided in the form of tables from which the program
estimates values through linear interpolation. The models use
quadrilateral elements with linear basis functions. The programs also
handle isoparametric elements with quadratic or cubic basis functions.
The models GS2 and GS3 are documented in a single report {see references).
GS2 is the two-dimensional version and GS3 is designed for the analysis
of three-dimensional problems.
IGWMC Key: 2960 Model name: MOISTRE/Biological-Chemical
Model category: unsaturated flow, solute transport
Authors: Dutt, G.R., M.J. Shaffer, and W.J. Moore
Current version:
Release date: 1972
First released: 1972	IGWMC Check-date: 10/92
Institution of Model Development: Univ. of Arizona, Dept. of Soils, Water
and Eng., Tuscon, Arizona
Code Custodian: Dutt, G.R.
Univ. of Arizona, Dept. of Soils, Water and Eng.
Tuscon, AZ 85721
Model Developed for: research, general use, education
Documentation: theory, user's guide, examples, program structure,
code listing, verification
Model Testing: lab. datasets, field datasets
Peer Review:	concepts, theory
Availability: public domain, source code
Computer Requirements:	compiler
Abstract:
MOISTRE/Biological-Chemical is a finite difference model for simulation of
soil-water-plant systems. From an initial state and time sequential input
variables, the model simulates the non-steady state chemical, physical and
biological changes occurring in the unsaturated soil matrix and
percolating water. Processes considered are: (1) infiltration and
redistribution of soil water; evapotranspiration; (3) nitrogen
transformations including hydrolysis of urea-N, immobilization of NH4+-N,
mineralization of organic-N, and immobilization of N03.-N; (4) changes in
the solute concentration of soil water due to ion exchange, solubility of
gypsum and lime (CaC03) , and dissociation of certain ion pairs; and (5)
nitrogen uptake by crops.
Remarks:
The program requires the following input: top and bottom boundary
conditions for flow; Blaney-Criddle crop consumptive use constants?
number, date, type and amount of water applications; maximum and
minimum moisture content; initial moisture content; number, depth from
surface to lower boundary, and identification of soil horizons; mean air
temperature; average daylight hours; root distribution; plant uptake of
nitrogen compounds; soil temperature distribution; irrigation or rainfall
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water analysis; and initial soil chemical analysis.
MOISTRE/Biological-Chemical predicts with time soil moisture content and
movement and the distribution and concentration of the constituents
considered, i.e., Ca**, Mg*+, Na+, NH/, SO/, HC03*, CI", C03=, N03-,
CaS04.2H20, CaCOj, CO(NH2)2, and organic-N. The model consists of two
modules: (1) the moisture flow model MOISTRE; and (2) the
Biological-Chemical Program, which uses the output of MOISTRE as part of
its input.
In addition, the program requires fertilizer application rates and
composition and organic matter application characteristics. MOISTRE
assumes the boundary condition at the lower boundary to be the upper limit
of an unfluctuating water table; this condition allows both upwards and
downwards flux at this boundary. Three upper boundary conditions are
employed at the soil surface to simulate infiltration, evaporation, or
zero flux.
IGWMC Key; 2961 Model name: MOISTRS
Model category: unsaturated flow
Authors: Warrick, A.W., and A, Amoozegar-Fard
Current version:
Release date; 1981
First released: 1981	IGWMC Check-date: 11/92
Institution of Model Development: Univ. of Arizona, Dept. of Soils, Water
and Eng., Tuscon, Arizona
Code Custodian: Warrick, A.W.
Univ. of Arizona, Dept. of Soils, Water and Eng.
Tuscon, AZ 85721
Model Developed for; research, general use
Documenta11 on: theory, examples, code lxstxng
Model Testing:
Peer Review;
Availability: public domain, source code
Computer Requirements: compiler
Abstract:
MOISTRS is a finite difference model for simulation of infiltration,
drainage or cyclic water application using Philip's equation. It solves
the non-linear moisture flow equation using a Crank-Nicholson scheme. The
upper boundary condition is given as specified flux, while the lower
boundary condition is unit hydraulic gradient.
IGWMC Key: 2980 Model name; GROMULA (GROundwater flow in a
MUlti-LAyer system)
Model category: saturated flow
Authors: Broks, A.P.M., D. Dijkstra, and J.W. Wesseling
Current version:
Release date: 1985
First released: 1979	IGWMC Check-date: 10/90
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Institution of Model Development: Delft Hydraulics Laboratory, Water
Resources and Environment Div.
Delft, The Netherlands
Code Custodian: Wesseling, J.W.
Delft Hydraulics Laboratory
P.O. Box 152, 8300 AD Emmeloord, The Netherlands
Model Developed for: research, general use, education
Documentation: theory, user's guide, examples
Model Testing:
Peer Review:
Availability: proprietary, purchase; source code
Computer Requirements; compiler
Abstract:
GROMULA is a user-oriented finite element model to simulate steady-state
or transient, two-dimensional groundwater flow in anisotropic
heterogeneous, multi-layered aquifer systems.
IGWMC Key: 2981 Model name; GROMAGE
Model category: saturated flow
Authors: Gilding, B.H., and J.W. Wesseling
Current version:
Release date: 1985
First released: 1981	IGWMC Check-date; 10/90
Institution of Model Development; Delft Hydraulics Laboratory, Water
Resources and Environment Div.
Delft, The Netherlands
Code Cus todian; Wes s e1x ng, J. .
Delft Hydraulics Laboratory
P.O. Box 152, 8300 AD Emmeloord, The Netherlands
Model Developed for: general use
Documentation: theory, user's guide, examples
Model Testing:
Peer Review:
Availability: proprietary, purchase; source code
Computer Requirements: compiler
Abstract:
GROMAGE is a finite element model for transient simulation of
two-dimensional horizontal groundwater flow and drainage in anisotropic
heterogeneous multi- layered aquifer systems.
IGWMC Key: 2982 Model name: GROWKWA
Model category: saturated flow, solute transport
Authors: Wesseling, J.W.
Current version:
Release date: 1982
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First released: 1982	IGWMC Check-date; 08/85
Institution of Model Development: Delft Hydraulics Laboratory
P.O. Box 152, 8300 AD Emmeloord, The
Netherlands
Code Custodian: Wesseling, J.W.
Delft Hydraulics Laboratory
P.O. Box 152, 8300 AD Emmeloord, The Netherlands
Model Developed for: general use
Documentation: theory, user's guide
Model Testing:
Peer Review:
Availability: proprietary, license? source code
Computer Requirements: compiler
Abstract:
GROWKWA is a transient finite element model for simulation of
two-dimensional horizontal groundwater movement and non-conservative
solute transport in a multi- layered, anisotropic, heterogeneous aquifer
system.
IGWMC Key: 29 83 Model name: SOMOF
Model category: unsaturated flow
Authors: Wesseling, J.W.
Current version:
Release date: 1982
First released: 1980	IGWMC Check-date: 02/93
Institution of Model Development:
Code Custodian: Wesseling, J.W,
Delft Hydraulics
P.O. Box 152, 83
Delft Hydraulics Laboratory
P.O. Box 152, 8300 AD Emmeloord, The
Netherlands
Laboratory
0 AD Emmeloord, The Netherlands
Model Developed for:
Documentation:
Model Testing;
Peer Review;
Availability:
Computer Requirements:
research, general use
theory, user's guide, examples
proprietary,
compiler
license; source code
Abstract:
SOMOF is a finite difference model for the simulation of transient
unsaturated soil moisture flow in a vertical profile. The model handles
various processes, including infiltration from precipitation, capillary
forces, evapotranspiration, gravity drainage, ponding, and plant uptake.
Remarks:
SOMOF has been applied for a verification study of the "Black-Box" model,
initially used in the PAWN (Policy Analysis of the Watermanagement in The
Netherlands) study.
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IGWMC Key: 3092 Model name: AQMAN (AQuifer MANagement)
Model category: saturated flow, management/optimization
Authors: Gorelick, S.M., and L.J. Lefkoff
Current version:
Release date: 10/86
First released: 1986	IGWMC Check-date: 09/90
Institution of Model Development; U.S. Geological Survey, Water Resources
Div., Menlo Park, CA 94025
Code Custodian: S.M. Gorelick
Stanford Univ., Dept. of Applied Earth Sc.,
Stanford, CA 94305
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
research, general use, education
theory, user's guide, examples, program structure,
code listing, verification
verification
concepts, theory, documentation
public domain, source code
compiler, IMSL math library, MINOS or MPS
optimization package
Abstract:
Used in conjunction with a mathematical programming code {e.g. MPS or
MINOS), AQMAN identifies the pumping or recharge strategy that achieves a
user's management objective while maintaining groundwater hydraulic
conditions within desired limits. The objective may be linear or quadratic,
and may involve the minimization of pumping and recharge rates or of
variable pumping•costs. The problem may contain constraints on groundwater
heads, gradients, and velocities for a complex, transient hydrologic system.
A unit stress is applied at each decision point well and transient responses
are computed using a modified two-dimensional finite difference flow model
of the USGS {Trescott et al. 1976). The program is based on the use of
the response matrix optimization method.
IGWMC Key: 3101 Model name: GWFLOW/GWMESK/GWPLOT
Model category: saturated flow
Authors: Warner, J.W., and D.D. Walker
Current version:
Release date: 9/91
First released:	IGWMC Check-date: 09/91
Institution of Model Development: Colorado State Univ., Dept. Civil Eng.
Fort Collins, CO 80523
Code Custodian: Warner, J.W.
Colorado State Univ., Dept. of Civil Eng.
Fort Collins, CO 80523
Model Developed for: general use
Do cumen tation:
Model Testing:
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Peer Review:
Availability: proprietary, purchase; source code, compiled (PC)
version
Computer Requirements: IBM PC/AT, DOS 2.0, 640 Kb RAM, CGA
Abstract:
GWFLOW is a two-dimensional finite element flow model, based on a solution
of the linearized Boussinesq equation using triangular elements and linear
shape functions. The model has a choice of two solvers: a banded Gauss
algorithm and a preconditioned conjugate gradient solver. A preprocessor,
GWMESH, helps the user interactively design the mesh, organize the input
data, interpolate non-uniform aquifer properties, and edit input for the
GWFLOW model. The package also includes GWPLOT, a postprocessor and
graphics program to view the mesh and provide for contouring of the
simulation results.
IGWMC Key: 3150 Model name: HVRLV 1
Model category: aquifer test analysis
Authors: Weyer, K.U., and W.C. Horwood-Brown
Current version:
10/81
1981	IGWMC Check-date; 06/82
Release date
First released
Institution of Model Development: National Hydrology Res. Inst., Ground
Water Div., Calgary, Alberta, Canada
Code Custodian: Weyer, K.U.
Nat. Hydrology Res. Inst., Ground Water Div.,
101-4616 Valiant Drive N.W., Calgary, Alberta,
Canada, T3A OXG
Model Developed for: research, general use
Documentation: theory
Model Testing:
Peer Review:	concepts, theory
Availability:	public domain, source code
Compu t e r r equ irements:	coxpi1er
Abs trac t:
This model is an interactive, user-oriented calculation of permeabilities
from slug tests using Hvorslev's formulae for filters in uniform soil.
IGWMC Key: 3180 Model name: VERA
Model category: saturated flow, solute transport, heat transport
Authors: Van Duyn, C.J.
Current version:
Release date: 2/82
First released: 1982	IGWMC Check-date: 01/83
Institution of Model Development: Delft Soil Mechanics Laboratory
P.O. Box 69, 2600 AB, Delft, The
Netherlands
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Code Custodian: Van Duyn, C.J.
Delft Soil Mechanics Laboratory
P.O. Box 69, 2600 AB, Delft, The Netherlands
Model Developed for: research, general use
Documentation: theory-
Model Testing:
Peer Review:
Availability:
Computer requirements: compiler
Abstract *
VERA is a multi-dimensional convective-dispersive model for prediction of
contaminant or heat transport in saturated, anisotropic, heterogeneous
porous media.
IGWMC Key: 3210 Model name: Saltwater Encroachment
Model category: saturated flow, solute transport, fresh/salt water flow
Authors; Yapa, P.N.N.D.
Current version;
Release date: 5/79
First released: 1979	IGWMC Check-date; 08/82
Institution of Model Development; Clar>cson College of Technology, Dept.
of Civil & Env. Eng., Potsdam, NY 13676
Code Custodian: Asan Geotechn. Inform. Center, Asian Inst. of Technology
P.O. Box 2754, Bangkok, Thailand
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer requirements:
research, general use
theory, user's guide, code listing
public domain, source code
compiler
Abstract:
This model is a two-dimensional horizontal, transient solute transport
model to simulate density dependent saltwater encroachment in an isotropic
homogeneous confined aquifer using historic head values.
IGWMC Key: 3220 -Model name: GEOFLOW
Model category: saturated flow, solute transport
Authors: Haji-Djafari, S., and T.C. Wells
Current version;
Release date: 1988
First released: 1982	IGWMC Check-date: 09/90
Institution of Model Development; D'Appolonia Waste Management Services,
Inc., Pittsburg, PA 15235
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Code Custodian: Haji-Djafari, S,
D'Appolinia Waste Management Services, Inc.
10 Duff Road, Pittsburg, PA 15235
Model Developed for:	research, general use, education
Documentation:	theory, user's guide, examples, verification
Model Testing:	verification
Peer Review:
Availability:	proprietary, license; source code
Computer requirements:	compiler
Abstract:
GEOFLOW is a Galerkin finite element model to simulate steady or
non-steady, groundwater flow and solute mass transport in two"dimensional
groundwater systems. The aquifer can be confined, semiconfined (leaky),
or unconfined and its properties can be anisotropic and heterogeneous.
Multiple wells with time-dependent flow rates can be specified. The model
includes geochemical reactions such as adsorption, acid neutralization,
and radioactive decay. The model comes with a graphical postprocessor to
produce contours, velocity vectors, and isopachs.
IGWMC Key; 3230 Model name: AQUIFER
Model category: saturated flow
Authors: Sagar, B.
Current version:
Release date: 4/82
First released: 1982	IGWMC check-date: 10/90
Institution of Model Development: Analytic and Computational Research,
Inc., Bel Air, Calif.
Code Custodian: Runchal, A.K.
Analytic and Computational Research, Inc.
1931 Stradella Road, Bel Air, CA 90077
Model Developed for: general use
Documentation; user's guide, code listing
Model Testing:
Peer Review:
Availability: proprietary, license; source code (main frame),
compiled (PC)
Computer requirements: IBM PC/AT, DOS 2.1, 640 Kb RAM, CGA
Abstract:
AQUIFER is a finite difference model for the analysis of steady and
non-steady state, two-dimensional areal or cross-sectional, radial flow in
heterogeneous, anisotropic multiaquifer systems.
IGWMC Key: 3231 Model name: DEWATER
Model category: saturated flow
Authors: Sagar, B.
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Current version:
Release date: 4/82
First released: 1982	IGWMC Check-date: 09/90
Institution of Model Development: Analytic and Computational Research,
Inc., Bel Air, Calif.
Code Custodian: Runchal, A.K.
Analytic and Computational Research, Inc.
1931 Stradella Road, Bel Air, CA 90077
Model Developed for: general use
Documentation: user's guide, code listing
Model Testing:
Peer Review;
Availability: proprietary, license; source code, compiled (PC)
version
Computer requirements: IBM PC/AT, DOS 2.1, 640 Kb RAM, CGA, math coprocessor
Abstract:
DEWATER is an integrated finite difference model for simulation of
two-dimensional, areal, cross-sectional or radial, steady or unsteady
state flow in anisotropic and heterogeneous, confined or water table
aquifers to predict drawdown due to time-varying pumping during surface
and subsurface mining and building construction operations.
IGWMC Key: 3233 Model name: PORFLOW - II (2D)
Model category: saturated flow, solute transport, heat transport
Authors: Runchal, A.K.
Current version:
Release date: 1988
First released; 1979	IGWMC Check-date: 05/92
Institution of Model Development: Analytic and Computational Research,
Inc., Bel Air, Calif.
Code Custodian: Runchal, A.K.
Analytic and Computational Research, Inc.
1931 Stradella Road, Bel Air, CA 90077
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability: proprietary, license
research, general use, education
theory, user's guide, examples, verification
verification
Computer Requirements:
Abstract!
source code (main frame),
compiled (PC)
Intel 80386 based computer,
space, CGA, math coprocessor
versions and other platforms
Mb RAM, 20 Mb disk
compiler for larger
PORFLOW II (2D) is an integrated finite difference model for analysis of
coupled, steady-state or transient, 2-dimensional horizontal, vertical or
radial, density dependent flow and heat and/or mass transport in
anisotropic, heterogeneous, non-deformable saturated porous media with
time dependent aquifer and fluid properties. User interface is based on
the FREEFORM language with simple English commands.
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Remarks:
PORFLOW II and PORFLOW III (IGWMC Key # 3238} provide optional coupling
with a thermo-mechanical stress model, developed by the same author. A
version of the PORFLOW series, PORFLOW-R, provides special features for
simulation of transport processes around high-level waste repositories.
These include, for example, an option to calculate the instantaneous or
cumulative nuclide flux crossing a given boundary,
PORFLOW II and PORFLOW III have been used extensively in real life problem
solving, e.g. at DOE's Hanford site in Washington, the Yucca Mountain site
in Nevada, DOE's Savannah River Plant in South Carolina, and DOE's INEL
plant m Idaho* A versxon of thxs model xs bexng used to sxmulate the
near-field behavior of high level nuclear waste repository in basalt.
See also PORFLO (IGWMC Key # 3790).
IGWMC Key: 3235 Model name: FLOTRA
Model category: unsaturated flow, solute transport,
deformation
heat transport,
Authors: Sagar, B.
Current version:
Release date: 2/82
First released: 1982
IGWMC Check-date: 10/90
Institution of Model Development: Analytic and Computational Research,
Inc., Bel Air, Calif.
Code Custodian: Runchal, A.K.
Analytic and Computational Research, Inc.
1931 Stradella Road, Bel Air, CA 90,077
Model Developed for: research, general use
Documentation: theory, user's guide, examples
Model Testing:
Peer Review:
Availability: proprietary, license; source code
Computer requirements:	compiler
Abstract:
FLOTRA is an integrated finite difference model for simulation of steady
or transient, two-dimensional areal, cross-sectional or radial,
density-dependent flow, heat and mass transport in variably saturated,
anisotropic, heterogeneous deformable porous media.
IGWMC Key: 3236 Model name: PORFREEZE
Model category: saturated flow, heat transport
Authors: Runchal, A.K.
Current version:
Release date: 6/81
First released; 1980	IGWMC Check-date: 05/92
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Institution of Model Development; Analytic and Computational Research,
Inc., Bel Air, Calif.
Code Custodian: Runchal, A.K.
Analytic and Computational Research, Inc.
1931 Stradella Road, Bel Air, CA 90077
Model Developed for: research, general use
Documentation: theory, user's guide, examples
Model Testing:
Peer Review:
Availability: proprietary, license; source code
Computer Requirements: compiler
Abstract:
POEFRE3Z3 simulates steady-state or transient two-dimensional
density-dependent saturated flow and heat transport in freezing porous
media. The coupled equations are solved with the finite difference method
and include time and temperature dependency of fluid and aquifer
properties.
Remarks:
This code has been used in modeling the effect of a chilled gas pipeline
in the Alaskan tundra {permafrost region).
IGWMC Key: 3237 Model name: PORSTAT/PORMC
Model category: saturated flow, solute transport, heat transport,
stochastic simulation
Authors: Sagar, B., and P.M. Clifton
Current version:
Release date: 1983
First released: 1983	IGWMC Check-date: 07/92
Institution of Model Development: Rockwell Hanford Operations
P.O. Box 800, Richland, WA 99352
Code Custodian: Rockwell Hanford Operations, Energy Systems Group
P.O. Box 250, Richland, WA 99352
Model Developed for: research, general use
Documentation: theory, user's guide, examples, program structure,
verification
Model Testing: verification, code intercomparison
Peer Review: concepts, theory
Availability: public domain, source code
Computer requirements: compiler
Abstract:
PORSTAT is a numerical model solving the two-dimensional stochastic
groundwater flow equation, optionally coupled with the deterministic heat
transfer and mass transfer equations using integrated finite differences
coupled to a direct equation solver. The stochastic groundwater modeling
is achieved by means of a second-order uncertainty analysis (using
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sensitivity coefficients), based on a Taylor series expansion of the state
variables of interest {hydraulic heads and Darcian velocities) about the
expected values of the model parameters. Uncertain variables which can be
considered are hydraulic conductivities, specific storage, boundary
conditions, and initial conditions. To assess the accuracy of P0R3TAT, a
Monte Carlo groundwater flow program (PORMC) was developed.
TGWMC Key: 3238 Model name: P0RFLQW/P0RFL0-3
Model category: saturated flow, unsaturated flow, multiphase flow, solute
transport, heat transport, porous medium, fractures
Authors: Runchal, A.K.
Current version: 2.41
Release date: 1992
First released: 1979	IGWMC Check-date: 05/92
Institution of Model Development: Analytic and Computational Research,
Inc., Bel Air, Calif.
Code Custodian: Runchal, A.K.
Analytic and Computational Research, Inc.
1931 Stradella Road, Bel Air, CA 90077
Model Developed for: research, general use, education
Documentation: theory, user's guide, examples, verification
Model Testing.-
Peer Review:
Availability:
verification, code intercomparison
concepts, theory, documentation, performance
proprietary, license; source code (main frame),
compiled (PC) version
Computer Requirements: Intel 80386 based computer, 4 Mb RAM, VGA {larger
compiled versions available) ,* compiler for other
platforms
Abstract
PORFLOW/PORFLO- 3 is an integrated finite difference model to simulate
coupled and uncoupled, transient or steady-state, multiphase fluid flow,
and heat, salinity, and/or chemical species transport in variably
saturated porous and/or fractured, anisotropic and heterogeneous media
with dynamic phase change. The highly modular program facilitates
arbitrary sources or sinks in two- or three-dimensional cartesian or
axisymmetric (cylindrical) geometry. The transport equation includes
advection, dispersion, diffusion, conduction, zero-order reversible
production and first-order irreversible decay. The user interface is
based on the FREEFORM language using simple English-like commands. The
software includes the ARCPLOT graphic post processor to generate charts of
flow vectors, contours, grids, 3D surface plots, and X-Y plots at any
cross-section. The model includes optional coupling with a
thermo-mechanical stress model.
Remarks:
See also PORFLO (IGWMC Key # 3790) and PORFLO II {# 3233).
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IGWMC Key: 3240 Model name: GM5 {Groundwater Model 5)
Model category: saturated flow
Authors: Liggett, J.A.
Current version:
Release date: 9/82
First released: 1982	IGWMC Check-date: 10/92
Institution of Model Development: Cornell Univ., School of Civil and Env,
Eng., Ithaca, NY 14850
Code Custodian: Liggett, J.A.
Cornell Univ., School of Civil and Env. Eng.
Hollister Hall, Ithaca, NY 14853
Model Developed for:
Document a t i on:
Model Testing:
Peer Review:
Availability: proprietary, purchase;
Computer Requirements: compiler
research, general use
theory, user's guide, examples, program structure,
code listing
verification
concepts, theory
source code
Abstract:
GM5 is a model using the boundary integral equation method (BIEM) for
simulation of steady state or unsteady quasi-three-dimensional saturated
groundwater flow in an anisotropic, heterogeneous, regional multi-aquifer
system. The aquifers may be confined or unconfined. Boundary conditions
include specified head and specified flux. The model has options for
distributed recharge and point-specific pumping or injection wells.
Remarks:
Three related programs are published in Liggett and Liu {1983; see
references). 1GM81 solves the Laplace equation in a closed region with
either Neumann or Dirichlet type boundary conditions or a mixture of both.
The region may have an arbitrary shape but is homogeneous. ' GM9' is an
extension of 'GM8' allowing insertion of special elements along the
boundary to improve the accuracy of the boundary conditions. 'DAM'
calculates unsteady, free surface flow through an earth dike of constant
permeability sitting on an impermeable base.
IGWMC Key: 3350 Model name: FEMSAT
Model category: saturated flow
Authors: Van Bakel, P.J.T.
Current version:
Release date: 8/78
First released: 1978	IGWMC Check-date: 10/90
Institution of Model Development: Inst, for Land & Water Management
Research (ICW), Wageningen, The
Netherlands
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Code Custodian: Van Bakei, P.J.T.
Inst, for Land and Water Management Research (ICW)
P.O. Box 35, 6700 AA Wageningen, The Netherlands
Model Developed for: research, general use
Documentation;
Model Testing:
Peer Review:
Availability:
Computer requirements:
theory, user's guide, code listing
proprietary, purchasej source code
compiler
Abstract:
FEMSAT is a finite element model for simulation of transient
two-dimensional horizontal flow in a saturated heterogeneous, anisotropic
multi-layered aquifer system.
IGWMC Key: 3360 Model name: PROSPER
Model category: soil water budget
Authors: Goldstein, R.A., J.B. Mankin, and R.J. Luxmoore
Current version:
Release date: 2/74
First released: 1974	IGWMC Check-date: 11/92
Institution of Model Development: Oak Ridge Nat. Lab., Environm. Sciences
Div., Oak Ridge, Tennessee 37831
Code Custodian: Goldstein, R.A.
Oak Ridge Nat. Laboratories, Envxronxci. Sciences Div.,
Oak Ridge, TN 37831
Model Developed for:	general use
Documentation:	user's guide, examples, code listing
Model Testing:
Peer Review:
Availability:	public domain, source code
Computer requirements:	compiler
Abstract:
PROSPER is a water balance approach to modeling atmosphere-plant-soil
moisture relations on a day-to-day basis, using phenomer.ological
relationships.
IGWMC Key: 3370 Model name: FEMNATER/FECWATER
Model category: saturated flow, unsaturated flow
Authors: Yeh, G.T., and D.S. Ward
Current version:
Release date: 8/87
First released: 1980	IGWMC Check-date: 12/92
Institution of Model Development: Oak Ridge Nat. Lab., Environm. Sciences
Div., Oak Ridge, Tennessee 37831
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Code Custodian: Yeh, G.T,
Pennsylvania State Univ., Dept. of Civil Eng.
225 Sackett Bldg., University Park, PA 16802
Model Developed for: research, general use
Documentation: theory, user's guide, examples, program structure,
code listing, verification
Model Testing:	verification, lab. datasets, code intercomparison
Peer Review:	concepts, theory, documentation
Availability:	public domain, source code
Computer Requirements:	compiler
Abstract:
FEMWATER is a two-dimensional finite element model to simulate transient,
cross-sectional flow m saturated*unsaturated anxsotropxc, heterogeneous
porous media. Both point sources/sinks and non-point sources/sinks are
handled. The program permits a wide variety of non-steady state boundary
conditions, including a moving water-table and seepage faces. It allows
three alternative approximations for the time derivative, has three
options for estimating the non-linear matrix, and a direct and an
iterative matrix solution option. Furthermore, the program includes
automatic time-step adjustment and has an option to consider axisymmetric
problems. Darcy fluxes are calculated using an additional finite element
formulation assuring continuity across elements (local mass conservation).
Flow data from this program is used in FEMWASTE transport model.
Remarks:
FECWATER is a slightly updated version of the FEMWATER version of 1980. A
revised version of FEMWATER was written by G.T. Yeh (1987; see references)
FEMWATER is an extensively modified and expanded version of a
finite-element Galerkin model developed by Reeves and Duguid {1975; see
references).
The codes UNSAT2, BIM2D/3D, TRUST, FEMWATER, TOUGH, SUTRA, SATURN,
TRACR3D, and FLAMINGO are described and compared in: Yeh, T.C., T.C.
Rasmussen and D.D. Evans. 1988. Simulation of Liquid and Vapor Movement
in Unsaturated Fractured Rock at the Apache Leap Tuff Site: Models and
Strategies. NUREG/CR-5097, U.S. Nuclear Regulatory Commission,
Washington,. D.C. This report includes a detailed description of the code
characteristics and evaluates their applicability based on governing
equations and code options.
Petersen and Wilson (1988; see references) studied the effect of an
unsaturated zone between a stream and the water table on the infiltration
from the stream. Specifically, they simulated the connection or
disconnection between surface water and groundwater caused by a clogging
layer at the bottom of the stream. Five numerical variably saturated flow
models (TRUST, UNSAT2, FEMWATER, T3FEMWATER, and SATURN) were evaluated
with respect to their capabilities in simulating infiltration,
exfiltration, multidimensional unsaturated and saturated seepage, and
groundwater mounding.
FEMWATER shows some mass balance problems when applied to problems with
several orders of magnitude difference in hydraulic conductivity, due to
the manner in which velocities are calculated, directly at the nodes.
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IGWMC Key: 3371 Model name: FEMWASTE/FECWASTE
Model category: solute transport
Authors: Yeh, G.T., and D.S. Ward
Current version:
Release date: 4/81
First released: 1981	IGWMC Check-date: 11/92
Institution of Model Development: Oak Ridge Nat. Lab., Environm. Sciences
Div., Oak Ridge, Tennessee 37831
Code Custodian: Yeh, G.T.
Pennsylvania State Univ., Dept. of Civil Eng.
225 Sackett Bldg,, University Park, PA 16802
Model Developed for:
Documen tation:
Model Testing:
Peer Review:
AvailabiIxty:
Computer Requirements;
research, general use
theory, user's guide, examples, verification
verification
concepts, theory
public domain, source code, compiled (PC) version
IBM PC/AT, 640 Kb RAM, CGA, math coprocessor;
compiler for larger versions and other platforms
Abstract:
FEMWASTE/FECWASTE are two-dimensional finite element models for transient
simulation of areal or cross - sectional transport of dissolved
non- conservative constituents for a given velocity field in an
anisotropic, heterogeneous saturated or unsaturated porous medium. The
velocity field is generated by the accompanying FEMWATER/FECWATER
two-dimensional flow models.
Remarks:
FEMWASTE is a modified and updated version of a model published by Dug-;id
and Reeves in 1976. FECWASTE is a slightly modified and updated version
of FEMWASTE. FEMWASTE and FECWASTE use the velocity field generated by
the models FEMWATER and FECWATER, respectively (IGWMC key # 3370).
IGWMC Key: 3372 Model name: AQUIFLOW
Model category: saturated flow
Authors: Yeh, G.T., and C.W. Francis
Current version:
Release date: 1984
First released: 1983	IGWMC Check-date: 10/90
Institution of Model Development: Oak Ridge Nat. Lab., Environm. Sciences
Div., Oak Ridge, Tennessee 37831
Code Custodian: Yeh, G.T.
Pennsylvania State Univ., Dept. of Civil Eng.
225 Sackett Bldg., University Park, PA 16802
Model Developed for: research, general use
Documentation: theory, user's guide, code listing
Model Testing:
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Peer Review:
Availability; public domain, source code
Computer requirements: compiler
Abstract:
AQUIFLOW is a two-dimensional finite element model to simulate transient
flow in horizontal, anisotropic, heterogeneous aquifers under confined,
leaky or unconfined conditions.
IGWMC Key: 3373 Model name: FEWA {Finite Element model of Water flow
through Aquifers)
Model category: saturated flow
Authors: Yeh, G.T., and D.D. Huff
Current version:
Release date: 12/83
First released: 1983	IGWMC Check-date: 10/90
Institution of Model Development: Oak Ridge Nat, Lab,, Environm. Sciences
Div., Oak Ridge, Tennessee 37831
Code Custodian: Yeh, G.T.
Pennsylvania State Univ., Dept. of Civil Eng.
225 Sackett Bldg., University Park, PA 16802
Model Developed for: research, general use
Documentation: theory, user's guide, examples, program structure,
code listing, verification
Model Testing: verification, code intercomparison
Peer Review: concepts, theory
Availability:	public domain, source code
Computer requirements:	compiler
Abstract:
FEWA is a two-dimensional finite element model to simulate transient
vertically averaged flow in confined, leaky confined, or water table
aquifers. The fluid flow is a function of pressure gradient and gravity.
The model incorporates infiltration and evapotranspiration, leakage, and
artificial injection and withdrawal. The aquifer may be partially
confined and partially unconfined. The grid may include both
quadrilateral and triangular elements. The resulting matrix equations are
solved using a pointwise iteration solution strategy as optional
alternatives to the direct solution method.
IGWMC Key: 3374 Model name: FRACPORT
Model category: saturated flow, solute transport, porous medium, fractures
Authors: De Angelis, D.L., G.T, Yeh, and D.D, Huff
Current version:
Release date; 10/85
First released: 1985	IGWMC Check-date: 10/90
Institution of Model Development: Oak Ridge Nat. Lab., Environm. Sciences
Div., Oak Ridge, Tennessee 37831
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Code Custodian; De Angel is, D.L.
Oak Ridge Nat, Laboratories, Env. Sc. Div.
Oak Ridge, TN 37831
Model Developed for:
Documentation:
research, general use
theory, user's guide, examples, program structure,
code listing, verification
Model Testing: verification
concepts, theory
source code
Peer Review
Availability: public domain,
Computer requirements: compiler
Abstract:
FRACPORT (FRACtured PORous medium Transport) is an integrated
compartmental model for describing the advective-dispersive transport of a
non-conservative solute in a three-dimensional fractured saturated porous
medium. The model assumes a known velocity field. It solves the
transport equation on two different time scales: one related to rapid
transport of solute along fractures and the other related to slower
transport through the porous matrix. A governing equation is developed
for each interior compartment. The equation are assembled m matnx form
and solved in two steps, first using a direct method or an iterative
method, followed by an iteration procedure over all boundary connectors.
The model handles Diriehlet, Neumann, Cauchy, and variable boundary
conditions.
IGWMC Key3375 Model name: MATTUM
Model category: unsaturated flow, heat transport
Authors: Yeh, G.T., and R.J. Luxmoore
Current version:
Release date: 1983
First released: 1983	IGWMC Check-date: 05/92
Institution of Model Development: Oak Ridge Nat. Lab., Environm. Sciences
Div., Oak Ridge, Tennessee 37831
Code Custodian: Oak Ridge Nat. Laboratories, Env. Sc. Div.
Oak Ridge, TN 37831
Model Developed for. research, general use
Documentation: theory, user's guide, examples, code listing,
verification
Model Testing: verification
Peer Review: concepts, theory
Availability: public domain, source code
Computer requirements:	compiler
Abstract:
MATTUM is a three-dimensional model for simulating moisture and thermal
transport in unsaturated porous media. The model solves both the flow
equation and the heat transport equation under unsaturated water
conditions using the integrated compartment method. The entire unsaturated
zone is divided into a number of compartments of different sizes and
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shapes. The Philip-de vries equations governing moisture movement and heat
transfer are integrated over each of the compartments to yield a system of
nonlinear ordinary differential equations. There are three optional time
integration schemes: split explicit, implicit pointwise iteration, and
matrix inversion iteration.
IGWMC Key: 3376 Model name: FEMA (Finite Element model of Material
transport through Aquifers)
Kode1 category, solute transport
Authors: Yeh, G.T., and D.D. Huff
Current version:
Release date; 1985
First released: 1984	IGWMC Check-date: 10/90
Institution of Model Development: Oak Ridge Nat. Lab., Invironm. Sciences
Div., Oak Ridge, Tennessee 37831
Code Custodian: Yeh, G.T.
Pennsylvania State Univ., Dept. of Civil Eng.
225 Sackett Bldg,, University Park, PA 16802
Model Developed for*, research, general use
Documentation: theory, user's guide, examples, program structure,
code listing, verification
Model Testing: verification, field datasets, code intercomparison
Peer Review: concepts, theory
Availability: public domain, source code
Computer Requirements: compiler
Abstract:
FEMA is a two-dimensional finite element model for simulation of solute
transport in heterogeneous, anisotropic porous media. The
advective-dispersive transport model includes radioactive decay, sorption
and biological and chemical degradation, consolidation, and natural and
artificial sources and/or sinks. The model grid may include both
quadrilateral and triangular elements. FEMA solves the solute transport
equation only, requiring the velocity field to be generated by the
accompanying flow model FEWA.
Remarks;
A geochemical model, HYDROGEOCHEM, has been developed at Oak Ridge
National Lab. by interfacing FEMA with MINEQL (presented at ISIS Seminar
on Supercomputers in Hydrology, Purdue University, West-Lafayette,
Indiana, Sept, 1985; U.S. Dept. Of Energy, Washington, D.C.).
The velocity field needed as input for FEMA can be generated using the
flow model FEWA by the same authors (see IGWMC key # 3373) .
IGWMC Key: 3377 Model name: 3DFEMWATER
Model category: saturated flow, unsaturated flow
Authors: Yeh, G.T.
Current version:
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Release date: 1991
First released: 1987
IGWMC Check-date; 1992
Institution of Model Development: Oak Ridge Nat. Lab., Environm. Sciences
Div., Oak Ridge, Tennessee 37831
Code Custodian: Yeh, G.T.
Pennsylvania State Univ., Dept. of Civil Eng.
225 Sackett Bldg., University Park, PA 16802
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
research, general use
theory, user's guide, examples, program structure,
code listing, verification
verification, code intercomparison
concepts, theory, documentation
public domain, source code
comp x1er
Abstract:
3DFEMWATER is a three-dimensional finite element model for simulation of
water steady state and transient flow through saturated-unsaturated media.
The model is designed to handle anisotropic and heterogeneous geologic
media, time-varying distributed and point sources and sinks, a wide
variety of time-varying boundary conditions, including prescribed heads
over the Dirichlet boundary, fluxes due to pressure gradient varying along
the Neumann boundary, total fluxes over the Cauchy boundary, evaporation,
infiltration, seepage on the soil-air interface, and a moving water table.
There are three options for estimating the nonlinear matrix, two options
for solving the linearized matrix equation, and it includes automatic time
step adjustment. (see also remarks). 3DFEMWATER may be used in
conjunction with 3DF1MWASTE or 3DLEWASTE to simulate transport of a
non- conservative solute.
Remarks:
Petersen and Wilson (1988; see references) studied the effect of an
unsaturated zone between a stream and the water table on the infiltration
from the stream. Specifically, they simulated the connection or
disconnection between surface water and groundwater caused by a clogging
layer at the bottom of the stream. Five numerical variably saturated flow
models (TRUST, UN'SAT2, FEMWATER, T3FEMWATER, and SATURN) were evaluated
with respect to their capabilities in simulating infiltration,
exfiltration, multidimensional unsaturated and saturated seepage, and
groundwater mounding.
3DFEMWATER includes the offdiagonal hydraulic conductivity components in
the modified Richards equation for dealing with cases where the coordinate
system does not coincide with the principal directions of the hydraulic
conductivity tensor. The linearized matrix equations are solved either by
the successive subregion block iteration method or by the successive point
iteration method. The model checks the mass balance computation over the
entire region.
IGWMC Key: 3378 Model name: AQUITRAN
Model category: solute transport
Authors: Yeh, G.T., and C.W. Francis
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Current version:
Release date: 1984
First released: 1984	IGWMC Check-date: 12/90
Institution of Model Development: Oak Ridge Nat. Lab., Environm. Sciences
Div., Oak Ridge, Tennessee 37831
Code Custodian: Oak Ridge Nat. Laboratories, Env. Sc. Div.
Oak Ridge, TN 37831
Model Developed for: research, general use
Documentation: theory, user's guide, examples, code listing,
verification
Model Testing:	verification
Peer Review: concepts, theory, documentation
Availability:	public domain, source code
Computer requirements:	compiler
Abstract:
AQUITRAN is a two-dimensional, vertically averaged solute transport model
based on an orthogonal-upstream weighing finite element scheme, which
results in a matrix amenable to successive over-relaxation (SOR) solution
strategies. The model considers advection, dispersion, sources/sinks,
first-order decay, and linear equilibrium adsorption. The model needs a
hydraulic head distribution as generated by the complementary model
AQUIFLQW by Yeh (1984). The set of weighing functions are developed for
line, quadrilateral and triangular elements. For large problems, when SOR
iteration must be employed to solve the matrix equation, the
orthogonal-upstream weighting scheme provides the only scheme resulting in
convergent SOR computations for all Peclet numbers.
IGWMC Key: 3379 Model name: 3DFEMWASTE/3DLEWASTE
Model category: solute transport
Authors: Yeh, G.T., and V.S. Tripathi
Current version:
Release date: 1991
First released: 1987	IGWMC Check-date: 10/93
Institution of Model Development: Oak Ridge Nat. Lab., Environm. Sciences
Div., Oak Ridge, Tennessee 37831
Code Custodian: Yeh, G.T.
Pennsylvania State Univ., Dept. of Civil Eng.
225 Sackett Bldg., University Park, PA 16802
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer requirements:
research, general use
concepts and theory
public domain, source code
compiler
Abstract:
3DFEMWASTE is a finite element code for threedimensional simulation of
nonconservative solute transport. The model requires interfacing with
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3DFEMWATER flow model for saturated/unsaturated conditions to obtain
transient velocity distributions. 3DLEWASTE is a version of 3DFEMWATER
using a combined Lagrangian-Eularian formulation for solute transport.
IGWMC Key: 3380 Model name: GRDFLX
Model category: solute transport
Authors: Codell,	R.B., K.T. Key, and G. Whelan
Current version:
Release date:	6/82
First released:	1982	IGWMC Check-date: 12/90
Institution of Model Development: Battelle Pacific Northwest
Laboratories, Environm. Sciences Div.
P.O. Box 999, Richland, WA 99352
Code Custodian: Codell, R.B.
U.S. Nuclear Regulatory Commission, Off. of Nuclear
Reactor Regulation, Washington, DC 20555
Model Developed for: general use
Documentation: theory, user's guide, examples, program structure,
code listing
Model Testing:
concepts, theory, documentation
public domain, source code
compiler
Peer Review
Availability
Computer requirements
Abstract:
The program GRDFLX consists of two analytical models,* one, GKND,
calculates the vertically averaged concentration at points in a uniform
aquifer of finite thickness with constant physical transport properties.
The other, FLUX, calculates the flux of radioactive liquid effluent
passing a plane perpendicular to the groundwater flow direction. Both
models assume a horizontal, limited area source. Radioactive decay is
treated separately from the transport computations to facilitate analysis
of releases of long decay chains. The models are based on Simpson's rule
of integration. They include linear equilibrium adsorption (retardation)
and three-dimensional dispersion.
IGWMC Key: 3400 Model name: BALANCE
Model category: hydrogeochemical
Authors: Parkhurst, D.L., L.N. Plummer, and D.C. Thorstenson
Current version: 1.1
Release date: 2/92
First released: 1982	IGWMC Check-date: 01/93
Institution of Model Development: U.S. Geological Survey, Water Resources
Div., National Center, Reston, VA 22092
Code Custodian: Parkhurst, D.L.
U.S. Geological Survey, Water Resources Div.
418 Federal Center, Lakewood, CO 80225
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Model Developed for:
Documentation:
Model Testing:
Peer Review:
research, general use
theory, user's guide, examples, program structure,
code listing
concepts, theory, documentation
Availability: public domain, source code, compiled (PC) version
Computer Requirements: IBM PC/AT, 640 Kb RAM, CGA; compiler for other
platforms
Abstract:
BALANCE is a reaction model designed to define and quantify chemical
reactions between groundwater and minerals. It uses the chemical
composition of water samples from two points along a flow path and a set
of mineral phases (minerals, organic substances, or gases) hypothesized to
be the reactive constituents in the system to calculate the mass transfer
necessary to account for the observed changes in composition between the
two water samples. Additional constraints can be included in the problem
formulation to account for mixing of two end-member waters, redox
reactions, and, xn a simplified form, isotropic composition. BALANCE
solves any set of linear equations formulated by the user and is not
constrained by thermodynamic criteria.
Remarks:
NETPATH has replaced BALANCE
IGWMC Key: 3410 Model name: NFLUX/SALTFLO
Model category: unsaturated flow, solute transport
Authors: Wagenet, R.J., W.R. Tillotson, C.W, Robbins, and R.J. Hanks
Current version:
Release date: 1982
First released: 1980	IGWMC Check-date: 11/92
Institution of Model Development: Utah State Univ., Dept of Soil Science
and Biometeorology, Logan, Utah
Code Custodian: Wagenet, R.J.
Cornell Univ., Dept. of Agronomy
Ithaca, NY 14853
Model Developed for: research, general use, education
Documentation: theory, examples, code listing, verification
Model Testing; lab. datasets
Peer Review:
Availability: public domain, source code
Computer Requirements:	compiler
Abstract:
SALTFLO is a finite difference model for flow and solute transport and
includes precipitation and dissolution of lime and gypsum and the exchange
of the four cations calcium, magnesium, sodium, and potassium in the
presence of transient fluxes of water and salt in soil. It uses a
numerical approach to the coupled nitrogen transport-transformation
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equations of Wagenet as represented by NFLUX, which describes transport
and transformation of urea, NH4+, N03", and .associated water fluxes in
soil-plant systems under transient field conditions in presence of plant
extraction of water and nitrogen. A heat flow model has been integrated
into the simulation to facilitate temperature dependence of nitrogen
transformation and soil chemistry. Plant uptake of nitrogen is included.
Remarks:
The model calculates pressure head, water differential capacities,
hydraulic conductivities and diffusivities as function of water content,
soil water content, and soil temperature. It also calculates
time-dependent potential evaporation, potential transpiration and root
growth and extraction of water. Furthermore, it provides ion
concentration, as well as precipitation and dissolution of lime and
gypsum, plant uptake of nitrogen, adsorbed urea and NH4 concentration, and
crop yield. Transport processes includes advection and hydrodynamic
dispersion.
IGWMC Key: 3411 Model name: LEACHM
Model category: unsaturated flow, solute transport, microbial
growth/die-off
Authors: Wagenet, R.J.
Current version: 3.0
Release date: 1992
First released: 1986
and J.L. Hutson
IGWMC Check-date: 08/93
Institution of Model Development: Cornell Univ., Dept. of Soil, Crop and
Atmospheric Sciences
Ithaca, New York 14853
Code Custodian:
Hutson, J.L.
Cornell Univ., Dept. of Soil, Crop and Atmospheric
Sciences, Bradfield and Emerson Halls, Ithaca, NY 14853
Model Developed for:
Documentation:
Model Testing
Peer Review
Availability
Computer Requirements:
research, general use
concepts and theory, input instructions, example
problems, test results
laboratory data sets, benchmarking
concepts, mathematical framework
restricted non-proprietary, source code, compiled
(PC) version
IBM PC/AT, 640 Kb RAM, CGA; compiler for larger
versions or other platforms
Abstract:
LEACHM (Leaching Estimation And CKemistry Model) refers to five versions
of a simulation model which describes the water regime and the transport
and fate of chemicals in the shallow unsaturated zone. The Richard's
equation and the convective-dispersive transport equations are solved
using finite differences. LEACHN describes nitrogen transport and
transformation, LEACHP simulates pesticide displacement and degradation,
LEACHC describes movement of various inorganic ions, LEACHB describes
microbial population dynamics in the presence of a single
growth-supporting substrate, and LEACHW describes the water regime only.
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The models handle multi-layered soil profiles under transient conditions
and include plant uptake of water and solutes, precipitation and surface
evaporation of water. A heat flow model producing soil temperature
profiles is included in LEACHN and LEACHP. LEACHM is a modular model with
separate routines for each simulated process.
Remarks:
LEACHP transports pesticides, other miscible organic compounds, or tracers
accounting for sorption, sources and sinks. The model includes linear
sorption on the solid phase and diffusion in the gas phase if the chemical
is volatile. It can simulate the fate of many chemicals simultaneously.
The various species may be grouped in degradation or transformation
pathways. Plant uptake in the transpiration stream may be included.
LEACHC transports the major inorganic cations and anions in soil. It
calculates chemical equilibrium between solution, exchange and
precipitated phases at user-specified intervals. The sink term in the
convection-diffusion equation is used to represent plant uptake. Because
of the competiveness of the multi*cation exchange processes special
subroutines are included for cation exchange, precipitation-dissolution
and atmospheric exchange.
LEACHN transports urea, ammonium and nitrate accounting for sorption,
sources and sinks. The model includes linear sorption on the solid phase
and diffusion m the gas phase if the chemical is volatile. Nitrogen
transformations include three mineralization reactions, nitrification, and
denitrification. Plant uptake of nitrogen can be simulated using the
Watts and Hanks approach or the Nye/Warncke approach.
LEACHB transports organisms, substrate and tracer accounting for sorption,
sources and sinks. Microbial growth and utilization is described by
Monod-type equations. Equations for predator-prey systems in flowing
water are included. The model include linear isotherm sorption. The
model has various options to introduce substrate and allows for an
indigenous supply of substrate.
The LEACHM modules LEACHC, LEACHN, LEACHP and LEACHW are available from
the authors as a package of FORTRAN source codes and data files. The
source codes are ready for compiling on an IBM-PC/AT using Microsoft
FORTRAN 5.0. Research institutions can obtain the package for $300; use
for commercial and consulting purposes is at author's discretion.
IGWMC Key: 3432 Model name: CXTFIT
Model category; tracer test analysis
Authors: Parker,	J.C., and M. Van Genuchten
Current version: 1.0
Release date: 05/85
First released:	1984	IGWMC Check-date; 06/94
Institution of Model Development: Virginia Polytechnical Inst., Soil and
Env. Science, Blacksburg, VA 24061
Code Custodian: Parker, J.C.
Environmental Systems & Technologies, Inc.
2701 Ramble Road, Suite 2, Blacksburg, VA 24060
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Model Developed for:
Document a t i or.:
Model Testing
Peer Review
Availability
Computer Requirements;
research, general use
theory, user's guide, examples, program structure,
code listing
lab. datasets
concepts, theory
proprietary, purchase,- source code ' {main frame) ,
compiled (PC)
IBM PC/AT, DOS 2.1, 640 Kb RAM, CGA; compiler for
other platforms
Abstract:
CXTFIT is a program for determining transport parameters. It is based on
a nonlinear least - squares inversion method, and it can be used to identify
several parameters in a number of different one-dimensional solute
transport models. One of these analytical models is based on the usual
convection-dispersion equation with terms accounting for linear
equilibrium adsorption, zero-order production and first-order decay. In
addition, a two-site/two-region model is included that can be applied to
various nonequilibrium transport problems. Also included is a stochastic
model that considers the effects of areal variations in hydraulic fluxes
on field-scale solute transport. The last model also has provisions for
zero- or first-order production or decay or both. The least-squares
inversion method can be used to analyze both spatial and temporal
distribution of flux or resident concentrations. The model comes with a
preprocessor and allows plotting of results with a laser printer or pen
plotter.
IGWMC Key: 3433 Model name: ONESTEP
Model category: parameter ID unsaturated flow
Authors: Kool, J.B., J.C. Parker, and M.Th. Van Genuchten
Current version: 1.1
Release date: 10/85
First released: 1985	IGWMC Check-date: 06/94
Institution of Model Development: Virginia Polytechn. Inst.
245 Smyth Hall, Blacksburg, VA 24061
Code Custodian: Van Genuchten, M.Th.
USDA/ARS, U.S. Salinity Laboratory
4500 Glenwood Drive, Riverside, CA 92501
Model Developed for: research, general use, education
Documentation: theory, user's guide, examples, verification
Model Testing: verification, lab. datasets
Peer Review: concepts, theory
Availability: proprietary, purchase; source code, compiled (PC)
version
Computer Requirements: IBM PC/AT, DOS 2.1, 640 Kb RAM, CGA; compiler for
other platforms
Abs tract:
ONESTEP is a program for estimation of up to five unknown parameters in
the van Genuchten soil hydraulic property model. The program requires
measurements of cumulative outflow with time during one-step outflow
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experiments. The outflow data can be optionally supplemented with
measurements of' equilibrium moisture contents and pressure heads. The
program combines non-linear optimization with a Galerkin finite element
model.
IGWMC Key: 3540 Model name: CREAMS
Model category; unsaturated flow, solute transport, watershed runoff
Authors: Knisel, W.G.
Current version
Release date
First released
4/82
1980	IGWMC Check-data: 10/92
Institution of Model Development: U.S. Department of Agriculture
Science and Education Administr.,
Agricultural Research, 442 East Seventh
Street, Tuscon, AZ 85705
Code Custodian: Knisel, W.G.
U.S. Dept. of Agriculture, ARS, Southeast Watershed Res.
Lab., P.O. Box 946, Tifton, GA 31793
Model Developed for: research, general use, education
Documentation: theory, user's guide, examples, verification
Model Testing: verification
Peer Review:
Availability:	public domain, source code, compiled (PC) version
Computer Requirements:	compiler
Abstract:
CREAMS (A field scale model for Chemicals, Runoff, and Erosion from
Agricultural Management Systems) is a general watershed model designed to
evaluate non-point source pollution from alternate management practices
for field-size areas. It consists of three main components: hydrology,
erosion/sedimentation and chemistry. The hydrology model handles storm
runoff, infiltration, soil water movement (providing amount of seepage
beneath root zone and initial soil water content before a storm), and
soil/plant evapotranspiration between storms. Infiltration is based on a
modified Green-Ampt model or the SCS curve number technique. The
chemistry model includes a nutrient (nitrogen and phosphorus) sub-model and
a pesticide submodel.
Remarks:
J.W. Laundre (1990) tested CREAMS and ERHYM-II (Ekalaka Rangeland
Hydrology and Yield Model) for use in evaluating trench cap designs at the
Idaho National Engineering Laboratory. Each model was used to postdict
soil moisture, evapotranspiration, and runoff of two watersheds for which
data were available. Initial estimated soil moisture patterns from CREAMS
did not fit filed data well. Adjustment of the snow melt routine in the
model and use of field based wilting point data produce a better fit with
the observations. Both models adequately predicted annual
evapotranspiration, but performed not very well in the prediction of
runoff. Sensitivity analysis showed that model predictions were most
sensitive to soil porosity, vegetation cover, and wilting point.
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CREAMS was developed to assist in evaluation of agricultural management
systems and their effects on non-point pollution potential. The CREAMS
model is the predecessor of GLEAMS (see IGWMC Key # 3541) , The USDA Soil
Conservation Service released its own version of CREAMS in 1984 (USDA
1984; see references). CREAMS was microbased in 1985 using the PC version
developed at the University of Guelph, Ontario, Canada.
CREAMS and HELP have been reviewed and tested by Barnes and Rogers (1987,
1988; see references) for their functionality in designing stable landfill
covers. Studies of parameters for land disposal unit design at several
sites, assuming a variety of regionally possible plant covers were carried
out. They concluded that overall predictions of soil moisture using
CREAMS more closely resembled measured soil moisture than those obtained
with HELP (version 1).
IGWMC Key: 3541 Model name: GLEAMS
Model category: unsaturated flow, solute transport, surface runoff,
sediment transport
Authors: Leonard, R.A., W.G. Knisel, and F.M. Davis
Current version:
Release date: 1990
First released: 1987	IGWMC Check-date: 10/90
Institution of Model Development: U.S. Dept. of Agriculture, Agricultural
Research Station
Southeast Watershed Experimental
Station, P.O. Box 946, Tifton, GA 31793
Code Custodian: Leonard, R.A., W.G. Knisel or F.M. Davis
USDA/ARS, P.O. Box 946, Tifton, GA 31793
Model Developed for: research, general use, education
Documentation; theory, user's guide, examples, program structure,
code listing, verification
Model Testing: lab. datasets, field datasets
Peer Review:
Availability: public domain, source code, compiled (PC) version
Computer Requirements: IBM PC/AT, DOS 2.1, 512 Kb RAM, CGA; compiler for
larger versions and other platforms
Abstract:
GLEAMS (Groundwater Loading Effects on Agricultural Management Systems)
was developed as an extension of an earlier USDA model, CREAMS. Both
models simulate soil water balance and surface transport of sediments and
chemicals from agricultural field management units. GLEAMS, in addition,
simulates chemical transport in and through the plant root zone. Several
other features were added such as irrigation/chemigation options,
pesticide metabolite tracking, and software to facilitate model
implementation and output data analysis. Input requirements for the model
include daily rainfall volumes, crop and management parameters; soil and
physical parameters; pesticide property data such as solubility, and
expected half-life in soil and/or foliage.
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Remarks:
The predecessor to GLEAMS, CREAMS, is annotated as IGWMC key # 3540.
As of mid 1990, since its release in late 1986, over 500 copies of GLEAMS
have been provided to users worldwide (Leonard et al. 1990). Since its
first release it has been constantly updated and expanded.
IGWMC Key: 3550 Model name: IIHR Model
Model category: saturated flow, unsaturated flow, watershed runoff
Authors: Jain, S.C.
Current version:
Release date: 1982
First released: 1982	IGWMC Check-date: 10/83
Institution of Model Development; Univ. of Iowa, Iowa Inst, of Hydraulic
Res., Iowa City, Iowa 52242
Code Custodian: Jain, S.C.
Univ. of Iowa, Iowa Inst, of Hydraulic Res.
Iowa City, Iowa 52242
Model Developed for: research, general use
Documentation
Model Testing
Peer Review
Availability
Computer requirements
theory, user's guide, code listing
concepts, theory
public domain, source code
compiler
Abstract;
IIHR is a watershed model which simulates surface runoff, infiltration,
and groundwater flow in a heterogeneous aquifer. It divides the watershed
into stream segments each with different slope, width, land-use, soil
characteristics, etc. The processes included in the model are
infiltration, overland flow, channel routing and sediment flow.
IGWMC Key: 3570 Model name: INFIL
Model category: unsaturated flow
Authors: Vauclin, M. ,* A.I. El-Kadi (IGWMC version)
Current version: 2.0
Release date: 1987
First released: 1979	IGWMC Check-date: 06/93
Institution of Model Development: Institute de Mecanique de Grenoble
BP 68, 39402 St. Martin D'Heres, Cedex,
France
Code Custodian: El-Kadi, A.I.
Univ. of Hawaii-Manoa, Dept. of Geology and Geophysics
2525 Correa Road, Honolulu, HI 96822
Model Developed for: research, general use, education
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Documentation:
theory, user's guide, examples, code listing,
verification
Model Testing: verification, lab. datasets
concepts, theory
main frame, public domain, source code; PC,
proprietary, compiled only
IBM PC/AT, 640 Kb RAM, CGA, math coprocessor;
compiler for other platforms
Peer Review:
Availability:
Computer Requirements:
Abstract:
INFIL is a finite difference model which solves for ponded infiltration
into a deep homogeneous soil. The model is based on the Philip series
solution of a one-dimensional form of the Richards equation. Output
includes water content profile and amount and rate of infiltration at
different simulation times. The program, which requires the soil
properties to be expressed in mathematical form, is designed to accommodate
three different sets of these functions. They include the four parameter
function of Vauclin (1979), the three parameter functions of Brutseart
(1966 and 1967) , and the two parameter function of Brooks and Corey
(1964). A modified version by A.I. El-Kadi also includes a van Genuchten
function (see remarks}.
Remarks:
The VAX and IBM PC FORTRAN versions, distributed by the IGWMC, were
modified from the original by Aly I. 11-Kadi and include options for three
different sets of soil properties functions. The FORTRAN (IBM PC or Vax)
version, released by the IGWMC in 1982, is run in batch fashion while the
BASIC (IBM PC or VAX) version, released by the IGWMC in 1987 and containing
the additional van Genuchten function, is run in interactive fashion.
IGWMC Key: 3580 Model name: KANSASHEAT
Model category: saturated flow, heat transport
Authors: Willhite, G.P., and J. Wagner
Current version:
Release date: 1974
First released: 1974	IGWMC Check-date: 07/92
Institution of Model Development: Water Resources Inst., Univ. of Kansas
Lawrence, Kansas, 66045
Code Custodian: Willhite, G.P.
Univ. of Kansas, Dept. of Chemical and Petroleum Eng.
Room 124, Lindley Hall, Lawrence, KS 66045
Model Developed for:	research, general use
Documentation:	theory, user's guide, code listing
Model Testing:
Peer Review:
Availability:	public domain, source code
Computer requirements:	compiler
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Abstract:
KANSASHEAT is a block-centered finite difference model for simulation of
three-dimensional fluid flow and convective-conductive heat transfer in
heterogeneous anisotropic media. The model includes heat transfer in
over- and underburden.
IGWMC Key: 3600 Model name: SWIGS2D
Model category: fresh/salt water flow
Authors: Contractor, D.N.
Current version:
Release date: 1982
First released: 1976	IGWMC Check-date: 09/91
Institution of Model Development: Water & Energy Research Inst, of the
Western Pacific
University of Guam, College Station,
Mangilao, Guam 96913
Code Custodian: Contractor, D.N.
Univ. of Arizona, Dept. of Civil and Mech, Eng.
Tuscoel, AZ 85721
Model Developed for: general use
Documentation: theory, user's guide, examples, program structure,
code listing, verification
Model Testing:	verification
Peer Review:	concepts, theory
Availability:	public domain, source code
Computer Requirements:	compiler
Abstract;
SWIGS2D is a two-dimensional finite element model to simulate transient,
horizontal salt and fresh water flow separated by a sharp interface in an
anisotropic, heterogeneous, confined, semi-confined or water table
aquifer. The model solves the depth-averaged equations for continuity for
fresh water and salt water simultaneously using linear, triangular
elements. Boundary conditions of the Dirichlet and/or Neumann type can be
applied. Pumping rates, recharge rates, and boundary conditions can be
specified as function of time. The program can track the location of the
salt water toes and the fresh water toes (where the phreatic surface
touches the impervious base). The program can provide the magnitude and
direction of fresh and salt water velocities in each element.
Remarks:
The code is also available from S.J. Winter, Director, WERI, University of
Guam, Mangilao, Guam 96913.
The solution has been checked for accuracy against the following analytic
solutions: 1) steady, one-dimensional saltwater intrusion in confined and
unconfined aquifers; 2) unsteady drawdown due to pumping in a confined
aquifer (Theis solution) - saltwater heads are assumed to be zero
everywhere; and 3) one-dimensional gravitational, segregation problem.
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IGWMC Key: 3610 Model name: CHEMTRN/THCC
Model category: saturated flow, solute transport, hydrogeochemical
Authors: Miller, C.W., L.V. Benson, and C.L. Carnahan
Current version:
Release date: 1986
First released: 1981	IGWMC Check-date: 11/92
Institution of Model Development: Lawrence Berkeley Lab,, Earth Sc. Div.
Univ. of California, Berkeley, CA 94720
Code Custodian: Miller, C.W. or L.V. Benson
Lawrence Berkeley Lab., Earth Sc. Div.
1 Cyclotron Road, Berkeley, CA 94720
Model Developed for:	research, general use
Documentation:	theory, verification
Model Testing:	code intercomparison
Peer Review:	concepts, theory
Availability:	public domain, source code
Computer Requirements:	compiler
Abstract:
CHEMTRN is a one-dimensional simulation of advective-diffusive-dispersive
transport of a reactive chemical in a saturated porous medium by
simultaneously solving the mass action, transport and site constraint
equations. Sorption is modeled by ion exchange and surface complexation.
The code allows precipitation and dissolution processes. The activity
coefficient is computed by Davies equation. THCC is a modified version of
CHEMTRN including redox reactions. THCC uses a one-step algorithm to
incorporate chemical reactions directly into the chemical transport
equations and solve then simultaneously.
Remarks:
THCC has been compared with DYNAMIX using an uranium transport problem
(Liu and Narasimhan 1989; see references).
IGWMC Key: 362 0 Model name: WATEQF
Model category: hydrogeochemical
Authors: Plummer, L.N., B.F. Jones, and A.H. Truesdell
Current version:
Release date: 1984
First released: 1976	IGWMC Check-date: 09/90
Institution of Model Development: U.S. Geological Survey, Water Resources
Div., National Center, Reston, VA 22092
Code Custodian: Plummer, L.N.
U.S. Geological Survey, Water Resources Div.
432 National Center, Reston, VA 22092
Model Developed for: research, general use
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Documentation: theory, user's guide, examples, code listing,
verification
verification
concepts, theory, documentation
public domain, source code, compiled (PC) version
IBM PC/AT, DOS 2.1, 640 Kb RAM, CGA, math
coprocessor; compiler for other platforms
Model Testing:
Peer Review:
Availability:
Computer Requirements:
Abstracts
WATEQF is a program to model the thermodynamic speciation of inorganic
ions and. complex species in solution for given water analysis. Processes
included are mass balances and redox reactions.
Remarks:
The WATEQF program is the Fortran version of the original WATEQ program of
1973, which was written in PL/1. Modified version have been published in
1930 (WATEQ2; see IGWMC Key # 4890), 1981 (WATEQ3; # 4891), and 1992
(WATEQ4F; # 4890), among others.
A version with uranium added and improved data entry has been developed by
S. Lueck and is available from D. Runnels, Dept. of Geological Science,
University of Colorado, Boulder, CO 80302.
PCWATEQ is an aqueous ion model with user-friendly data entry. It
computes activities of all major ion species, equilibrium gas pressures,
cation/anion balances, and saturation indices for up to 200 minerals.
PCWAT-4 is similar to PCWATEQ but includes reactions for trace elements
such as Cs, Rb, I, Cu, Zn, Cd, Pb, Ni, Ag, and As. These IBM-PC programs
are available from: Shadoware/Larry T. Rollins, 215 Cedar Lane, Woodland,
CA 95695.
Results from four chemical-equilibrium computer programs, REDEQL.EPA,
GEOCHEM, WATEQF, and SENECA2, have been compared with experimental
solubility data for some simple systems of interest with geothermal
brines: Kerrisk, J.F. 1981. Chemical Equilibrium Calculations for
Aqueous Geothermal Brines. LA-8851-MS, Los Alamos Scientific Lab., Los
Alamos, New Mexico.
An update of the original WATEQF, called WATEQDR, has been published by
the Desert Research Institute, Reno, Nevada (Bohm and Jacobson, 1981, see
references). The modifications include inclusion of 12 new species, and
various enhancements of output options.
The WATEQF program has been discussed in: Thomas, S.D., B. Ross and J.W.
Mercer. 1982. A Summary of Repository Siting Models. NUREG/CR-2782,
U.S. Nuclear Regulatory Commission, Washington, D.C.
IGWMC Key: 3621 Model name: NETPATH
Model category: hydrogeochemical
Authors: Plummer, L.N., E.G. Prestemon, and D.L. Parkhurst
Current version: 1.22
Release date: 5/93
First released: 1992	IGWMC Check-date: 06/93
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Institution of Model Development: U.S. Geological Survey, Water Resources
Div., National Center, Reston, VA 22092
Code Custodian: Plumrrter, L.N.
U.S. Geological Survey, Water Resources Div.
432 National Center, Reston, VA 22092
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
general use, education
theory, user's guide, examples, code listing,
verification
lab. datasets
concepts, theory, documentation
public domain, source code, compiled (PC) version
IBM PC/AT, DOS 2.1, 640 Kb RAM, CGA, math coprocessor
Abstract:
NETPATH is an interactive program for the interpretation of net
geochemical mass-balance reactions between an initial and final water
along a hydrologic flow path. Alternatively, NETPATH computes the mixing
proportion of a final water. The program utilizes previously defined
chemical and isotopic data for waters from a hydrochemical system. Every
possible geochemical mass balance reaction model is examined between
selected evolutionary waters for a set of chemical and isotopic
constraints, and a set of plausible phases in the system. The
calculations are of use in interpreting geochemical reactions, mixing
proportions, evaporation and (or) dilution of waters, and mineral mass
transfer in the chemical and isotopic evolution of natural and
environmental waters.
Rayleigh distillation calculations are applied to each mass-balance
model that satisfies the constraints to predict carbon, sulfur, and
strontium isotopic compositions at the end point, including
radiocarbon dating. The accompanying report describes the types of
problems that can be solved, the methods used to solve problems, program
features, and examples. The report contains a disk with source and
executable for the codes DB (data base editing) and NETPATH.
IGWMC Key: 3640 Model name: SEAWTR/SEACONF
Model category: fresh/salt water flow
Authors: Allayla, R.I.
Current version:
Release date: 2/80
First released: 1980	IGKMC Check-date: 09/90
Institution of Model Development: Colorado State Univ., Dept. Civil Eng.
Fort Collins, CO 80523
Code Custodian: Allayla, R.I.
Colorado State Univ., Dept. of Civil Eng.
Fort Collins, CO 80523
Model Developed for; research, general use
Documentation: theory, user's guide, examples, code listing
Model Testing:
Peer Review:
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Availability: public domain, source code
Computer Requirements: compiler
Abstract:
SEAWTR/SEACONF is a two-dimensional finite difference model for simulation
of simultaneous horizontal flow of salt and fresh water separated by a
sharp interface in a confined or water table aquifer with anisotropic and
heterogeneous properties, including effects of capillary flow. This
. model consists of two programs: SEAWTR for water table conditions
and SEACONF for confined conditions. The model includes a mesh generator.
Remarks:
In testing the model, numerical results for location of the interface
matched those obtained physically and analytically except in areas greatly
influenced by vertical gradients.
IGWMC Key: 3650 Model name: Cyclic Storage of Fresh Water in Saline
Aquif ers
Model category: saturated flow, solute transport
Authors: Kimbler, O.K.
Current version:
Release date: 1975
First released: 1975	IGWMC Check-date: 12/83
Institution of Model Development; Louisiana State Univ., Louisiana Water
Resources Res. Inst.
Baton Rouge, LA 70803
Code Custodian: Kimbler, O.K.
Louisiana State Univ., Louisiana Water Resources Res.
Inst., Baton Rouge, LA 70803
Model Developed for: research, general use
Documentation:	theory, code listing
Model Testing:
Peer Review:
Availability:	public domain, source code
Computer Requirements:	compiler
Abstract:
This model consists of a series of analytical models designed to calculate
the injection rates of each bounding well to create zones of stagnation,
to calculate recovery efficiencies and dispersivity and to predict frontal
position during first injection half cycle.
Remarks:
Program CYCL1AM calculates recovery efficiency of process of storing fresh
water in saline aquifers for single cycle, program CYCL2AM calculates
recovery efficiency for two cycles. The program FRONT calculates positions
of leading and lagging edges of mixed zone when a fluid is injected in a
saline aquifer. The program BOUND calculates bounding-well rates necessary
to negate pro-existing ground water movement and create a zone of
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stagnation. The program CONCENT calculates concentration at the well bore
as a function of cumulative time since injection started (one cycle only),
IGWMC Key: 3690 Model name; INFSEAL
Model category: unsaturated flow
Authors: Moore, I.D.
Current version:
Release date: 1983
First released: 1982	IGWMC Check-date: 01/84
Institution of Model Development: Division of Water and Land Resources
Catchment Hydrology Section, P.O. Box
1666, Canbera City, A.C.T. 2601,
Australia
Code Custodian: Moore, I.D.
CSIRO, Div. of Water and Land Resources, Catchment
Hydrology Section
Box 1666, Canbera City, A.C.T. 2601, Australia
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer requirements:
research, general use, education
theory, code listing
concepts, theory
public domain, source code
compiler
Abstract:
INFSEAL solves one-dimensional infiltration into layered soils using
Richards' Equation. Effects of surface sealing and mulching are also
included.
IGWMC Key: 3730 Model name: M3
Model category: unsaturated flow, solute transport
Authors: Van Veen, J,A.
Current version:
Release date: 1983
First released: 1981	IGWMC Check-date: 11/83
Institution of Model Development: Foundation ITAL
P.O. Box 48, 6700 AA Wageningen,
Netherlands
Code Custodian: Van Veen, J.A.
Foundation ITAL
P.O. Box 48, 6700 AA Wageningen, The Netherlands
The
Model Developed for: research, general use
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
theory, user's guide, verification
verification, lab. datasets
concepts, theory
public domain, source code
compiler
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Abstract:
M3 is a finite difference model for simulation of the transport and
transformation of carbon and nitrogen in soils. It includes reactions
resulting from the activity of micro-organisms and recognizes the
interdependence of the C- and N-cycles. The model includes mineralization
and immobilization of nitrogen, (first- and zero-order) microbial growth
and death, nitrification, decomposition, volatilization of NH3, leaching
of N03", denitrification, and fixation of ammonium to clay minerals. The
model calculates inorganic N concentration, C02 evolution, microbial
biomass, and total N and C. The model allows for environmental factors
such as temperature and sorl moisture content, and for additions of
organic material.
Remarks:
Model has been applied to different climatic conditions in Europe, Canada,
Australia, and Mali (Africa).
IGWMC Key: 3760 Model name; SIMEQ
Model category: water budget, chemical mass balance
Authors; Schulz, H.D., and E.J. Reardon
Current version:
Release date: 4/83
First released: 1980	IGWMC Check-date: 11/92
Institution of Model Development: Geologisches Inst, der Universitat
Olshausenstr. 40/60, D 2300 Kiel,
Germany
Code Custodian: Schulz, H.D.
Geologisches Xnst. der Universxtat
Olshausenstr, 40/60, D 2300 Kiel, Germany
Model Developed for; research, general use
Documentation; theory, examples, verification
Model Testing: lab. datasets
Peer Review: concepts, theory
Availability: public domain, source code
Computer Requirements: compiler
Abstract:
SIMEQ is a combined mixing cell/analytical model for simulation of the
transport of a reactive solute in a ground water system. It simulates
two-dimensional transport in groundwater by calculating a grid of mixing
cells and by dividing up the continuum of time into time steps. For each
time step the equilibria of cation exchange and of solution or
precipitation of calcite are calculated. For the simulation of mass
transport from one mixing cell to all its neighbours during one time step
the analytical solution of the dispersive transport equation is used.
Cation-exchange equilibria are calculated using Cardano's solution of an
equation of the third degree. Calcite equilibrium under closed system
conditions is calculated using an iterative method.
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Remarks:
Code listing internally documented in German. Contact author for new
versions.
IGWMC Key: 3770 Model name: FEMSAT
Model category: saturated flow, unsaturated flow
Authors: Maslia,	M,L.
Current version:
Release date:	6/83
First released:	1980	IGWMC Check-date: 02/92
Institution of Model Development: U.S. Geological Survey, Water Resources
Div., Doraville, GA 30360
Code Custodian: Maslia, M.L.
U.S. Geological Survey, Water Resources Div.
6481 Peachtree Industrial Blvd., Suite B, Doraville, GA
30360
Model Developed for: research, general use, education
Documentation: theory, user's guide, examples
Model Testing:
Peer Review:	concepts, theory
Availability:	public domain, source code
Computer Requirements:	compiler
Abstract:
FEMSAT is a Galerkin finite-element model for steady-state or transient
simulation of two-dimensional, cross-sectional or axisymmetric simulation
of flow through heterogeneous, (an)isotropic saturated-unsaturated porous
media. The relative hydraulic conductivity is defined as a function of
unsaturated pressure head using Gardner's equation (1958). The model uses
triangular elements. Boundary conditions include constant head, constant
flux, zero flux and seepage face conditions.
IGWMC Key: 3790 Model name: PORFLO
Model category: saturated flow, solute transport, heat transport
Authors: Runchal, A.K., B. Sagar, R.G. Baca, and N.W. Kline
Current version: 5.6
Release date: 1985
First released: 1983	IGWMC Check-date: 11/92
Institution of Model Development: Analytic and Computational Research,
Inc., Bel Air, Calif.
Code Custodian: Kline, N.W.
Boeing Computer Services Richland, Inc.
P.O. Box 300, Richland, WA 99352
Model Developed for: -research, general use
Documentation: theory, user's guide, examples, code listing,
verification
Model Testing: verification
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Peer Review: concepts, theory, documentation
Availability: public domain, source code
Computer Requirements: compiler
Abstract:
PORFLO is an integrated finite difference model for transient
two-dimensional or axisymmetric simulation of coupled buoyancy driven
groundwater flow, heat transfer and radionuclide transport in layered
geologic systems. Heat transfer processes include storage, advection,
conduction, dispersion and heat generation. Fluid flow processes include
storage, inflows and outflows, pore pressure buildup, buoyancy driving
force and temperature dependent hydraulic conductivity. Density is a
function of concentration. Mass transport processes can handle
multi-phase conditions and include storage, advection, dispersion,
diffusion, sorption, retardation, dissolution, decay, and mass release.
Remarks:
A Monte Carlo version of the code PORFLO is used for uncertainty analysis
of groundwater flow (Clifton 1985; see user references). This code,
PORMC, has been developed at the Basalt Waste Isolation Project, Richland,
Washington by BCS Richland, to be capable of stochastically modeling
coupled processes of groundwater flow, heat transfer and mass transport.
Also available for PORFLO: interactive contour and pathline preprocessors
and postprocessors for plotting of time histories and cross-sectional
profiles of head, temperature and concentration, and for plotting time
history of mass flux or fractional radionuclide release rate.
The PORFLO package includes documentation, independent functioning source
code, installation procedures and input and output files for test cases.
IGWMC Key; 3791 Model name: CHAINT
Model category: solute transport, porous medium, fractures
Authors: Kline, N.W., R.L. England, and R.C. Baca
Current version:
Release date: 12/85
First released: 1985	IGWMC Check-date: 11/92
Institution of Model Development: Boeing Computer Services Richland, Inc.
(BCS), Richland, Washington
Code Custodian: Rockwell Hanford Operations, Energy Systems Group
P.O. Box 250, Richland, WA 99352
Model Developed for: research, general use
Documentation: theory, user's guide, examples, program structure,
code listing, verification
Model Testing:	verification
Peer Review:
Availability:	public domain, source code
Computer Requirements:	compiler
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Abstract:
CHAIN? is a general purpose two-dimensional, Galerkin finite element model
for non-conservative radionuclide transport in a fractured porous medium.
CHAINT includes advection, dispersion, diffusion, retardation, chain-decay
with two daughters, and mass-injection. It employs a block-diagonal
frontal solution technique. It requires the head-output of the finite
element buoyancy driven flow model MAGNUM-2D as input. Continuum portions
of the medium may be modeled with two-dimensional isoparametric elements.
Discrete features are modeled with one-dimensional elements that are
embedded along the sides of the continuum elements. Output from CHAINT
includes a printed report of concentrations and postprocessor graphic
files.
Remarks:
The principal input to CHAINT consists of files generated by
two-dimensional simulation of buoyancy driven fluid flow code MAGNUM-2D
(see IGWMC key # 4590).
IGWMC Key: 3810 Model name: SEEP2D
Model category: saturated flow
Authors: Tracy, F.T,
Current version:
Release date: 9/83
First released: 1973	IGWMC Check-date: 04/91
Institution of Model Development: U.S. Army Corps of Engineers, Waterways
Exp. Station, Vicksburg, Mississippi
Code Custodian: Tracy, F.T.
U.S. Army Corps of Eng., Automatic Data Processing Div.
Waterways Experiment Station, P.O. Box 631, Vicksburg, MS
39180
Model Developed for
Documentation
Model Testing
Peer Review
Availability
Computer requirements
Abstract:
general use
theory, user's guide, examples, code listing
public domain, source code
compiler
SEEP2D is a steady-state finite element model for seepage analysis, using
five-node isoparametric elements. The model simulates cross-sectional or
axisymmetric flow in confined or (partially) ur.confir.ed, anisotropic,
heterogeneous porous media. For unconfined problems the resulting
phreatic surface is calculated. Input to the program consists of
permeability, element and node information and boundary conditions.
Output includes heads and discharge velocities. The free surface boundary
might cross boundaries of different soil layers. The package consists of
a preprocessor for automatic grid generation and interactive data input, a
FEM analysis program, and a postprocessor to plot results. Plots include
flow net contouring, and vector and number plots.
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IGWMC Key: 3820 Model name: USOCON
Model category: aquifer water budget, management/optimization.
Authors: Herraiz, A.S., A.S, Gonzalez, J.A. Alvarez, and M.V. Sanchez
Current version:
Release date: 1983
First released:	IGWMC Check-date: 06/92
Institution of Model Development: Minesterio de Obras Publicas y
Urbanismo, Servicio Geologico
Madrid, Spain
Code Custodian: Herraiz, A.S.
Servicio Geologico, Minesterio 'de Obras Publicas y
Urbanismo, Avenida de Portugal, 81, Madrid-11, Spain
Model Developed for
Documentation
Model Testing
Peer Review
Availability
Computer requirements
Abstract:
research, general use
theory, user's guide, examples
source code
compiler
USOCON is a conjunctive use management model consisting of a lumped
aquifer model coupled with an linear, dynamic programming optimization
routine. The objective function maximizes priority-weighted
appropriations constrained by the available volume of water.
IGWMC Key: 3 830 Model name: SUTRA
Model category: saturated flow, unsaturated flow, solute transport, heat
transport
Authors: Voss, C.I.
Current version: 2.0
Release date: 11/91
First released: 1984	IGWMC Check-date: 07/93
Geological Survey, Water Resources
National Center, Reston, VA 22092
Institution of Model Development: U.S
Div
Code Custodian: Voss, C.I.
U.S. Geological Survey, Water Resources Div
431 National Center, Reston, VA 22092
Model Developed for;
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
research, general use, education
theory, user's guide, examples, program structure,
code listing, verification
verification, lab. datasets
concepts, theory, documentation
public domain, source code, compiled (PC) version
IBM PC/AT (640 Kb RAM); Intel 80386 based computer
(4 Mb RAM), CGA, math coprocessor; compiler for
other platforms
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Abstract:
SUTRA (Saturated-Unsaturated TRAnsport) simulates transient or
steady-state, two-dimensional, variably saturated, fluid density
dependent ground water flow with transport of energy or chemically
reactive species solute transport. The model employs a hybrid
finite-element and integrated-finite-difference method to approximate the
coupled equations. Solute transport include advection, dispersion,
diffusion, equilibrium adsorption on the porous matrix, and both
first-order and zero-order decay or production. Energy transport may take
place in both the solid matrix and the liquid phase. SUTRA may be
employed in both areal (horizontal) and cross-sectional mode for saturated
systems or in cross-sectional mode only for unsaturated systems (see
remarks!. The unsaturated flow formulation is based on Richard's
equation. Boundary conditions, sources, and sinks may be time-dependent.
An option is available for storing intermediate results and restarting at
the intermediate time. Options are also available to print fluid
velocities in the system, to print fluid mass and solute mass or energy
budgets for the system, and to make temporal observations at points in the
system.
Remarks:
SUTRA provides, as preliminary calculated results, fluid pressures and
either solute concentrations or temperatures. Mesh construction is
flexible for arbitrary geometries employing quadrilateral finite elements
in Cartesian or radial-cylindrical coordinates. The mesh might be
coarsened through the use of pinch nodes. Boundary conditions, sources
and sinks may be time dependent. The model has a restart option. Options
are also available to print fluid velocities, and fluid mass, and solute
mass or energy budgets for the system.
SUTRA's numerical algorithms are not specifically applicable to
non-linearities of unsaturated flow. Therefore SUTRA, as distributed by
the USGS, requires fine spatial and temporal discretization for
unsaturated flow. The user can replace the included function for
unsaturated flow by others, and recompile the code.
SUTRA-PLOT is a menu-driven graphics post-processor for SUTRA, developed
by Souza (1987; see references). Graphic features include: 1) plots of
the finite element mesh; 2) velocity vector plots; 3) contour plots of
pressure, solute concentration, temperature, or saturation; and 4) a
finite element interpolator for gridding prior to contouring. SUTRA-PLOT
is a FORTRAN 77 program developed on a PRIME 750, using the DISSPLA
graphics library (v.9.0).
Makinde-Odusola and Marino (1989; see references) present a slightly
modified version of SUTRA coupled to a dynamic programming optimization
model using the MINOS nonlinear mathematical package. A quadratic
criterion representing a weighted sum of squared deviations from a target
piezometric surface within a confined aquifer was chosen as objective
function. A computed feedback rule is used to derive optimal pumping
rates.
SUTRA was evaluated by the Chemical Engineering Department at the Oklahoma
State University (see references). It was found to be well documented
with excellent background theory. Unsaturated flow was found to be very
sensitive to time step size.
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The new version of SUTRA. (USGS, June 199 0) includes the post-processor
SUTRAPLOT, based on an contouring algorithm developed by Arlen Harbough.
An extension of the code SUTRA is the code SATRA-CHEM by Lewis (1984}
1986; see IGWMC Key # 3831), It includes sorption, ion exchange and
equilibrium chemistry. The nonlinear components resulting from these
chemical processes are reduced into two time-dependent variables that
essentially plug into a general form of the classic advection-dispersion
equation.
The codes UNSAT2, BIK2D/3D, TRUST, FEMWATER, TOUGH, SUTRA, SATURN,
TRACR3D, and FLAMINGO are described and compared in.- Yeh, T.C., T.C.
Rasmussen and D.D. Evans. 1988. Simulation of Liquid and Vapor Movement
in Unsaturated Fractured Rock at the Apache Leap Tuff Site: Models and
Strategies. NUREG/CR-5097, U.S. Nuclear Regulatory Commission,
Washington, D.C. This report includes a detailed description of the code
characteristics and evaluates their applicability based on governing
equations and code options.
IGWMC Key: 3831 Model name: SATRA-CHEM
Model category: saturated flow, solute transport, hydrogeochemical
Authors: Lewis, F.M., C.I. Voss, and J. Rubin
Current version:
Release date: 1986
First released: 1984	IGWMC Check-date: 06/92
Institution of Model Development: U.S. Geological Survey, Water Resources
Div., National Center, Reston, VA 22092
Code Custodian; Lewis, F.M.
U.S. Geological Survey, Water Resources Div.
National Center, Reston, VA 22092
Model Developed for:
Documentation:
Model Testing:
Peer Review;
Availability:
Computer Requirements:
research, general use
theory, user's guide, examples, program structure,
code listing, verification
verification
concepts, theory, documentation
public domain, source code only
compiler
Abstract:
SATRA-CHEM is a hybrid Galerkin finite-element and integrated finite
difference model for simulation of horizontal or cross-sectional
two-dimensional flow and multi-species solute transport in fully saturated
porous media under confined conditions. SATRA-CHEM is based on the
constant-density model SATRA, which in itself is a simplified version of
SUTRA. The transport component of SATRA-CHEM is based on the
advection-dispersion equation for heterogeneous, anisotropic porous media.
Dispersivities are assumed to be direction-independent. The model
incorporates equilibrium controlled reactions: (1) linear sorption and up
to two aqueous complexations, or (2) bmary ion-exchange and a sxngle
complexation reaction involving one of the exchanging species. The time
derivative is approximated using a backwards finite-difference scheme.
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Remarks:
SATRA-CHEM is a modified version of the computer code SATRA, which itself
is a simplified version of the USGS flow and solute transport SUTRA (Voss
1984; see references; see also IGWMC Key # 3830) for the case of fully
saturated porous media and constant density fluid.
The documentation (Lewis et al; 1986) includes the results of several test
examples simulating the effects of the two-reaction systems on spatial
distribution of dissolved concentration during transport. The tests
include systems with linear sorption, aqueous complexation, sorption and
one or two aqueous complexations (all in one-dimension) and sorption and
aqueous complexation in two dimensions. Furthermore, the report discusses
examples of ion-exchange calculations.
IGWMC Key: 3832 Model name: AQUIFEM-SALT
Model category: saturated flow, fresh/salt water flow
Authors: Voss, C.I.
Current version: 1.0
Release date: 1984
First released: 1984	IGWMC Check-date: 01/94
Institution of Model Development: U.S. Geological Survey, Water Resources
Div., National Center, Reston, VA 22092
Code Custodian: Voss, C.I.
U.S. Geological Survey, Water Resources Div.
431 National Center, Reston, VA 22092
Model Developed for:	research, general use
Documentation:	concepts and theory, test results, input instructions
Model Testing:	benchmarking (analyt. solutions)
Peer Review:
Availability:	public domain
Computer Requirements:	compiler
Abstract:
AQUIFEM-SALT is a modification to AQUIFEM (Pinder, Frind, Trescott, and
Voss, 1979). AQUIFEM is a finite element areal ground-water flow model
for aquifer evaluation. The modified model, AQUIFERM-SALT, simulates an
aquifer containing a freshwater body that freely floats on seawater.
Parts of the freshwater lens may be confined above and below by less
permeable units. Theory, code modifications, and model verification are
discussed in the model documentation, which is intended as a companion to
the original AQUIFEM documentation.
Remarks:
AQUIFEM-SALT is a standard areal transient ground-water flow simulator for
confined or unconfined aquifers with the following generalization: the
bottom of the freshwater aquifer may be either a lower confining unit or
the xnterface between fresh water and salt water• The interface position
is determined by hydrostatic equilibrium between fresh and salt water and
the position and intersection of the interface with a lower or upper
confining unit may change with time due to changing freshwater heads.
This single fluid model assumes a sharp fresh/salt water interface.
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IGWMC Key; 3840 Model name: SWIFT
Model category: saturated flow, solute transport, heat transport, porous
medium, fractures
Authors: Dillon,	R.T. ,
Current version:
Release date:	19 81
First released:	1978
R.M. Cranwell, R.B. Lantz, and S.B. Pahwa
IGWMC Check-date; 11/92
Institution of Model Development: Sandia Nat. Lab., Fluid Mech. & Heat
Transfer Div., Albuquerque, New Mexico
Code Custodian: Cranwell, R.M.
Fluid Mech. and Heat Transfer Div., Sandia Nat.
Laboratories, Albuquerque, NM 87185
Model Developed for: research, general use
Documentation: theory, user's guide, examples, program structure,
code listing, verification
Model Testing: verification
Peer Review: concepts, theory, documentation
Availability: public domain, source code
Computer Requirements: compiler
Abstract:
SWIFT (Sandia Waste-Isolation Flow and Transport) is a three-dimensional
finite difference model for simulation of coupled, transient,
density-dependent flow and transport of heat, brine, tracers or
radionuclides in heterogeneous, anisotropic,, fractured, aquifers.
Transport processes include advection, dispersion, diffusion, sorption,
decay, and leaching. Two-line SOR iterative or direct-ordered solution
methods may be utilized.
Remarks:
The SWIFT code has been based on the SWIP/SWIPR code developed in 1976
for the U.S. Geological Survey and modified in 1979. SWIFT has been
superseded first by SWIFT II (IGWMC Key # 3841) and later by
SWIFT III/386/486 (IGWMC Key # 3842).
IGWMC Key: 3842 Model name: SWIFT III, SWIFT 386, SWIFT 486
Model category: saturated flow, solute transport, heat transport, porous
medium, fractures
Authors: Ward, D.S.
Current version: 2.52
Release date: 5/92
First released: 1987	IGWMC Check-date: 01/93
Institution of Model Development: GeoTrans, Inc,
46050 Manekin Plaza, Suite 100,
Sterling, VA 22170
Code Custodian: Ward, D.S.
GeoTrans, Inc.
46050 Manekin Plaza, Suite 100, Sterling, VA 2217C
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Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
Abstract:
general use
theory, user's guide, examples, program structure,
verification
verification, field datasets, synth. datasets, code
intercomparison
concepts, theory, accuracy, documentation
proprietary, license; compiled (PC) version (for
SWIFT 386, SWIFT 4865; source code for other platforms
Intel 80386 based computer, 4 Mb RAM, math
coprocessor, CGA/3GA/VGA graphics; Intel 80486 based
computer; source code available for porting to other
platforms
SWIFT 386 and SWIFT 486 represent a transient, fully three-dimensional
model which simulates the flow and transport of fluid, heat (energy),
brine, and radionuclide chains in porous and fractured geologic media.
The primary equations for fluid, heat, and brine are coupled by fluid
density, fluid viscosity, and porosity. Both Cartesian and cylindrical
coordinate systems may be used. For the fracture zone the model allows
both dual-porosity and discrete fractures. Migration within the rock
matrix is characterized as a one-dimensional process. Aquifer hydraulic
characteristics may be heterogeneous and anisotropic under confined or
unconfined conditions. The model includes linear and nonlinear
(Freundlich) isothermal equilibrium adsorption, hydrodynarrdc dispersion,
and diffusion.
Remarks:
Discretization is performed by the finite-difference method using centered
or backward weighting in the time and space domains. Matrix solution is
performed either by Gaussian elimination or by two-line successive
over-relaxation. SWIFT 386/486 incorporates a run-time monitor to display
the actions and numerical behavior of on-going transport simulations. The
IBM PC version handles between 10,000 and 30,000 finite difference blocks.
SWIFT 386/486 handles a variety of boundary conditions and source terms
for both the porous and fractured media including prescribed pressure
(head), temperature, and brine concentration; prescribed flux of fluid
(water), heat, brine, or (nuclide) mass; wellbore injection/production
submodel subject to pumping constraints; aquifer influence function {i.e.
Carter-Tracy infinite reservoir); waste leach radionuclide submodel for
waste repository nuclides and heat; and free (phreatic) surface with
recharge.
SWIFT III, SWIFT 386, and SWIFT 486 are updates of SWIFT (Sandia Waste-
Isolation Flow and Transport, IGWMC Key # 3840), originally released in
1978. A postprocessing program UNSWIFT for SWIFT 386 and SWIFT 486 allows
direct interfacing with the SURFER contouring package.
Verification and Validation of SWIFT III, SWIFT 386 and SWIFT 4 86:
Comparisons of results from the code and analytical solutions appear in
many documents, including intercomp (1976), Dillon et al. (1978), Ward
et al. (1984), Finley and Reeves (1981), and Reeves and al. (1987).
Also, the code has been compared with numerous field studies. The
comparisons support the evidence that the equations solved properly
reflect the observed geohydrologic behavior.
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IGWMC Key: 3850 Model name: 2D-STES Model
Model category: saturated flow, heat transport
Authors: Reffstrup, J.
Current version:
Release date: 1979
First released: 1979	IGWMC Check-date: OS/92
Institution of Model Development: Techn. Univ. of Denmark, Lab. for
Energy Technology, Lyngby, Denmark
Code Custodian: Reffstrup, J.
Technical Univ. of Denmark, Laboratory for Energy
Technology, Building 403, DK-28G0, Lyngby, Denmark
Model Developed for:	research, general use
Documentation:	theory
Model Testing:
Peer Review:
Availability:	source code
Computer re^xu^-rements:	compiler
Abstract:
2D-STES is a two-dimensional, cross-sectional or axisymmetric simulation
of heat loss and flow conditions in connection with the use of aquifers
for seasonal thermal energy storage.
IGWMC Key: 3860 Model name: DFT/C-1D
Model category: saturated flow, heat transport, deformation
Authors: Desai, C.S.
Current version:
Release date: 1984
First released: 1984	IGWMC Check-date: 10/90
Institution of Model Development: Univ. of Arizona, Dept. of Civil Eng.
and Mech. Eng., Tuscon, AZ 85721
Code Custodian: Desai, C.S.
Univ. of Arizona, Dept. of Civil and Mech. Eng.
Tuscon, AZ 85721
Model Developed for: research, general use
Documentation:	theory, user's guide, examples, code listing
Model Testing:
Peer Review:
Availability:	proprietary, purchase; source code
Computer requirements:	compiler
Abstract:
DFT/C-ID is a finite element model
stress - deformation (consolidation)
flow. The model calculates matrix
and pore water pressure.
for one-dimensional analysis of linear
and steady-state or transient fluid
displacement, fluid head, temperature
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IGWMC Key: 3861 Model name: FIELD-2D
Model category: saturated flow, heat transport, deformation
Authors: Desai, C.S.
Current version:
Release date:
First released:	IGWMC Check-date: 10/90
institution of Model Development: Univ. of Arizona, Dept. of Civil Eng.
and Mech. Eng., Tuscon, AZ 85721
Code Custodian: Desai, C.S.
Univ. of Arizona, Dept. of Civil and Mech, Eng.
Tuscon, AZ 85721
research, general use
theory, user's guide, code listing
Model Developed for;
Documentation:
Model Testing:
Peer Review;
Availability: proprietary, purchase; source code
Computer requirements: compiler
Abstract:
FIELD-2D is a finite element model for analysis of linear steady state
two-dimensional problems in torsion, potential flow, seepage and heat flow.
IGWMC Key: 3662 Model name: SEEP2(VM)-2D
Model category: saturated flow
Authors: Desai, C.S.
Current version:
Release date; 1984
First released: 1984	IGWMC Check-date: 10/90
Institution of Model Development: Univ. of Arizona, Dept. of Civil Eng.
and Mech. Eng., Tuscon, AZ 85721
Code Custodian; Desai, C.S.
Univ. of Arizona, Dept. of Civil and Mech. Eng.
Tuscon, AZ 85721
Model Developed for
Documentation
Model Testing
Peer Review
Availability
Computer requirements
Abstract:
research, general use
theory, user's guide, code listing
proprietary, purchase; source code
compiler
SEEP(VM)- 2D is a finite element model for two-dimensional planar,
cross - sectional or axi- symmetric simulation of steady confined, steady
free surface and transient free surface seepage in structures such as
dams, river banks, hill slopes and wells.
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IGWMC Key: 3863 Model name: SEEP(VM)- 3D
Model category: saturated flow
Authors: Desai, C.S.
Current version:
Release date: 1983
First released: 1983	IGWMC Check-date: 10/90
Institution of Model Development: Univ. of Arizona, Dept. of Civil Eng.
and Me oh» Eng. , Tuscon, AZ 85*721
Code Custodian: Desai, C.S.
Univ. of Arizona, Dept. of Civil and Mech. Eng.
Tuscon, AZ 85721
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer requirements:
research, general use
theory, user's guide, code listing
proprietary, purchase; source code
eompi1er
Abstract:
SEEP(VM)- 3D simulates three-dimensional confined, and steady and transient
free surface seepage in porous bodies (dams, wells, slopes, drains, media
with cracks) using a finite element technique with variable and moving
mesh.
IGWMC Key: 3864 Model name: STRESEEP-2D
Model category; saturated flow, deformation
Authors: Desai, C.S.
Current version:
Release date: 1984
First released: 1984	IGWMC Check-date: 10/90
Institution of Model Development: Univ. of Arizona, Dept. of Civil Eng.
and Mech. Eng., Tuscon, AZ 85721
Code Custodian: Desai, C.S.
Univ. of Arizona, Dept. of Civil and Mech. Eng.
Tuscon, AZ 85721
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer requirements:
research, general use
theory, user's guide, code listing
proprietary, purchase; source code
compiler
Abstract:
STRESEEP-2D is a finite element model for combined stress, seepage and
slope stability analysis of dams, embankments and slopes using the
residual flow method.
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IGWMC Key: 3865 Model name: C0NS2-1D
Model category: saturated flow, deformation
Authors: Desai, C.S.
Current version:
Release date: 1984
First released: 1984	IGWMC Check-date: 10/90
Institution of Model Development: Univ. of Arizona, Dept. of Civil Eng.
and Mech. Eng., Tuscon, AZ 85721
Code Custodian: Desai, . C. S.
Univ. of Arizona, Dept. of Civil and Mech. Eng.
Tuscon, AZ 85721
Model Developed for:	research, general use
Documentation:	theory, user's guide, code listing
Model Testing:
Peer Review:
Availability:	proprietary, purchase; source code
Computer requirements:	compiler
Abstract:
CONS2-1D is a finite element model for consolidation and settlement
analysis of foundations idealized as one-dimensional with linear variation
of pore water pressures.
IGWMC Key: 3866 Model name: CONSP(L/NL)- 2D
Model category: saturated flow, deformation
Authors: Desai, C.S.
Current versxon:
Release date: 1984
First released: 1984	IGWMC Check-date: 10/90
Institution of Model Development: Univ. of Arizona, Dept. of Civil Eng.
and Mech. Eng., Tuscon, AZ 85721
Code Custodian: Desai, C.S.
Univ. of Arizona, Dept. of Civil and Mech. Eng.
Tuscon, AZ 85721
Model Developed for:	research, general use
Documentation:	theory, user's guide
Model Testing:
Peer Review:
Availability:	proprietary, purchase; source code
Computer requirements:	compiler
Abstract:
CONSP(L/NL)- 2D is a finite element model for consolidation and settlement
analysis of foundations, dams and embankments idealized as plain strain.
Deformation is described by Biot's equation and is coupled with flow. The
model handles both linear elastic and non-linear elastic-plastic soil
behavior.
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IGWMC Key: 3867 Model name: CONSA(L)-2D
Model category: saturated flow, deformation
Authors: Desai, C.S.
Current version:
Release date:
First released:	IGWMC Check-date: 07/91
Institution of Model Development: Univ. of Arizona, Dept. of Civil Eng.
and Mech. Eng., Tuscon, AZ 85721
Code Custodian: Desai, C.S.
Univ. of Arizona, Dept. of Civil and Mech. Eng.
Tuscon, AZ 85721
Model Developed for:	research, general use
Documentation: theory, user's guide
Model Testing:
Peer Review:
Availability:	proprietary, purchase; source code
Computer requirements:	compiler
Abstract:
CONSA(L)-2D is a finite element model for consolidation and settlement
analysis of foundations, piles, tanks and other structures. The model
uses an axi-symmetric coordinate system. Consolidation described by
Biot's equation is coupled with Darcy flow. The model handles both
1 mear - el a s t i c and non-lmear elastic-plastic soil behavior.
IGWMC Key: 3868 Model name: MAST-2D
Model category: saturated flow, solute transport
Authors: Desai, C.S.
Current version:
Release date:
First released:	IGWMC Check-date: 06/92
Institution of Model Development: Univ. of Arizona, Dept. of Civil Eng.
and Mech, Eng., Tuscon, AZ 85721
Code Custodian: Desai, C.S.
Univ. of Arizona, Dept. of Civil and Mech. Eng.
-Tuscon, AZ 85721
Model Developed for:	research, general use
Documentation:	theory, user's guide
Model Testing:
Peer Review:
Availability:	proprietary, purchase; source code
Computer requirements:	compiler
Abstract;
MAST - 2D is a finite element solution of the coupled two-dimensional
transient seepage and convective-dispersive mass transport equations for a
saturated porous media. The coupling occurs through changes in density of
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the liquid with time as a function of concentration. The model,
applicable to two-dimensional cross-sectional problems, uses quadrilateral
4-node elements with bilinear variation of concentration, fluid pressure
and two components of velocity. The assemblage equations are solved using
a Crank-Nicolson scheme. The model has been designed for analysis of
density-varying transport problems such as saltwater intrusion and
pollutant transport.
IGWMC Key: 3870 Model name: GWMD3 - Appropriation Model
Model category: saturated flow
Authors: Jorgensen, D.G., H. Grubb, C.H. Baker Jr., and G.E. Hilmes
Current version:
Release date: 1982
First released: 1982	IGWMC Check-date: 10/90
Institution of Model Development: U.S. Geological Survey, Water Resources
Div., Lawrence, KS 66044
Code Custodian: Jorgensen, D.G.
U.S. Geological Survey, Water Resources Div.
District Office, 1950 Ave A-Campus West, University of
Kansas, Lawrence, KS 66044-3897
Model Developed for: general use
Documentation:	theory, user's guide, examples, code listing
Model Testing:
Peer Review:	concepts, theory, documentation
Availability:	public domain, source code
Computer requirements:	compiler
Abstract;
GWMD3 is an axi- symmetric finite difference model to calculate drawdowns,
due to a proposed well, at all existing wells in the section of the
proposed well and in the adjacent 8 sections and to compare drawdowns with
allowable limits. The model uses the automated water-rights file to
evaluate well-spacing and depletion requirements.
IGWMC Key: 3880 Model name: PARAMETER-ESTIMATION PROGRAM
Model category: saturated flow, inverse model
Authors: Tracy, J.V.
Current version:
Release date: 1980
First released: 1980	IGWMC Check-date: 10/90
Institution of Model Development: U.S. Geological Survey, Water Resources
Div., National Center, Reston, VA 22092
Code Custodian: Torak, L.J.
U.S. Geological Survey, Water Resources Div.
411 National Center, Reston, VA 22092
Model Developed for: general use
Documentation: theory, user's guide, code listing
Model Testing:
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Peer Review:
Availability:
Computer Requirements;
Abstract:
public domain, source code
compiler
This program is an automated calibration procedure to calculate
transmissivities, vertical hydraulic conductivities, storage coefficients
and specific storage of confining layers in a quasi-three-dimensional flow
system using the heads computed with the USGS 3D finite difference flow
model of Trescott et al. (1975) as input- The program uses statistical
analysis of the differences between observed and computed heads. The
algorithm xs based on upper trxangulatxon and back*substxtutxon.
Remarks:
To be used with modified USGS three-dimensional flow model as described
xn: Trescott, P.C., *'Documentatxon of a Fxnxte-Dxfference Model for
Simulation of Three-Dimensional Ground Water Flow", U.S. Geological
Survey, Open-File Report 75-438 (1975), to provide computed heads as input
for this program.
IGWMC Key: 3881 Model name: Two-Dimensional Finite Element Galerkin
Model
Model category: saturated flow
Authors: Tracy, J.V., and E.J. Wexler
Current version:
Release dat^e: 1984
First released: 1984	IGWMC Check-date: 03/92
Institution of Model Development: U.S. Geological Survey, Water Resources
Div., Lawrence, KS 66044
Code Custodian: U.S. Geological Survey, WATSTORE Program Office
437 National Center, Reston, VA 22092
Model Developed for:	general use
¦Documentation:	theory, user's guide
Model Testing:
Peer Review:	concepts, theory
Availability:	public domain, source code
Computer Requxrements:	compxler
Abstract:
This Galerkin finite element model simulates steady and transient
two-dimensional ground-water flow in an irregularly shaped confined or
unconfined aquifer using triangular or isoparametric elements. The
aquifer's transmissive and storage properties may be heterogeneous. The
model accounts for gains and losses from the river flow in each reach
based on the incoming river and tributary flows and the gain/loss of the
aquifer in each reach. With an estimate of river discharge, the river
stage is computed for each reach using an input stage-discharge
relationship. The river-aquifer gains/losses are calculated as a function
of streambed area, riverbed leakance values, and the head gradient between
river and aquifer. Well discharge can vary and evapotranspiration is
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calculated monthly. BC1s include specified flux and head.
Remarks:
A "regular" finite element grid is used, where the region is subdivided by
a given number of columns, each with an equal number of elements. The
columns do not need to be parallel or have the same length, resulting in a
deformed rectangular grid. Mass balances and cumulative volumes are
computed for each time step.
IGWMC Key: 3882 Model name: Galerkin Finite Element Solute Transport
Model
Model category: solute transport
Authors: Tracy, J.V,
Current version:
Release date* 1903
First released: 1980
IGWMC Check-date: 06/92
Institution of Model Development: U.S. Geological Survey, Water Resources
Div., National Center, Reston, VA 22092
Code Custodian: U.S. Geological Survey, WATSTORE Program Office
437 National center, Reston, VA 22092
Model Developed for: general use
Documentation: theory, user's guide, examples
Model Testing:
Peer Review; concepts, theory
Availability: public domain, source code
Computer Requirements: compiler
Abstract:
This Galerkin finite element solute transport model is designed for making
calculations of transient convective-dispersive transport of conservative
chemical constituents in a two-dimensional horizontal plane. The
transport model is linked with a previously developed finite element flow
model.
Remarks:
The flow model used is described by Bolke and Vaccaro (1981; see
references).
IGWMC Key: 3890 Model name: PT (Pressure-Temperature Code)
Model category: saturated flow, heat transport, deformation
Authors: Bodvarsson, G.S., and C.H. Lai
Current version:
Release date: 1986
First released: 1982	IGWMC Check-date: 11/92
Institution of Model Development: Lawrence Berkeley Lab., Earth Sc. Div.
Univ. of California, Berkeley, CA 94720
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Code Custodian: Bodvarsson, G.S.
Lawrence Berkeley Lab., Earth Sc. Div.
1 Cyclotron Road, Berkeley, CA 94720
Model Developed for: research, general use
Documentation: theory, user's guide, examples, code listing,
verification
Model Testing: verification
Peer Review: concepts, theory
Availability: public domain, source code
Computer Requirements: compiler
Abstract:
PT is a three-dimensional integrated finite difference model for
simulation of fully coupled three-dimensional, transient, single phase
fluid flow with simultaneous heat transport and one-dimensional subsidence
in anisotropic, heterogeneous porous media. The governing equations
consist of the conservation equations for mass and energy and Darcy's law
for fluid flow. Time stepping is fully implicit. The finite difference
solution includes the 2nd order Godunov method. Transport processes
include advection, dispersion, and precipitation/dissolution.
Remarks:
CPT is an update of the LBL code PTC that includes chemical transport and
reaction as parcels moving with flow lines.
IGWMC Key: 3920 Model name: Stream Function and Hydraulic Head Models
Model category: saturated flow, solute transport, fresh/salt water flow
Authors: Anand, S.C., and A. Pandit
Current version:
Release date: 6/83
First released: 1983	IGWMC Check-date: 07/92
Institution of Model Development: CIemson University, Water Resources
Res. Inst., CIemson, SC 29631
Code Custodian: Anand, S.C.
Clemson Univ., Water Resources Res. Inst.
Clemson, SC 29631
Model Developed for: research, general use
Documentation: theory, user's guide, examples, verification
Model Testing: verification, field datasets
Peer Review: concepts, theory
Availability: public domain, source code
Computer Requirements: compiler
Abstract:
This is a fully mixed model for simulation of steady-state or transient
saltwater intrusion in coastal aquifers and the density dependent
transport of solutes in anisotropic, heterogeneous, saturated porous
media. The model is based on the coupled or uncoupled simulation of flow
{head or stream function as dependent variable) and solute transport.
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Remarks:
Using the stream function model, the results are sensitive to the
selection of an appropriate mesh and region size. The choice of an
appropriate value for the under relaxation factor is essential for
convergence for high values of peclet number.
The flow transport is represented either in terms of the stream function
or the fresh water hydraulic head and the respective models are termed as
the stream function models and the hydraulic head model.
IGWMC Key: 3940 Model name: RESSQ
Model category: saturated flow, solute transport
Authors: Javandel, I., C. Doughty, and C.F. Tsang
Current version: 1.0
Release date: 2/85
First released: 1983	IGWMC Check-date: 10/90
Institution of Model Development: Lawrence Berkeley Lab., Earth Sc. Div.
Univ. of California, Berkeley, CA 94720
Code Custodian: Javandel, I.
Lawrence Berkeley Lab., Earth Sc. Div.
1 Cyclotron Road, Berkeley, CA 94720
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
education
's guide, examples, code listing,
general use,
theory, user1
verification
verification
concepts, theory
public domain, source code, compiled (PC) version
IBM PC/AT, 640 Kb RAM, CGA, math coprocessor;
compiler for other versions
Abstract:
RESSQ is a semi-analytical model of 2-dimensional contaminant transport
that calculates the streamline pattern in an aquifer, the location of
contaminant fronts around sources at specified times, and concentration
versus time at sinks. RESSQ assumes a homogeneous, isotropic confined
aquifer of uniform thickness and a steady-state regional flow field. It
can handle advection and linear equilibrium adsorption. Sources are
represented by fully penetrating recharge wells and ponds, and sinks are
represented by fully penetrating pumping wells.
Remarks:
A modified version to calculate the velocity field using a boundary
element method is given by Latinopoulos (1986; see user references).
This model is part of the AGU-10 program package distributed by the
International Ground Water Modeling Center. AGU-10 is a program
package based on the American Union's Water Resources Monograph 10
(see references). It consists of five analytical and semi-analytical
solute transport models. The version distributed by the IGWMC
includes two additional preprocessors, for RESSQ and RT, respectively.
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RESCUE is an interactive pre/postprocessor for RESSQ developed by M.S.
Beljin. It is available from the International Ground Water Modeling
Center as part of the AGU-10 package. RESCUE includes file manipulation
procedures and graphical screen or plotter display of results and has
options for CGA or EGA graphics.
A slightly modified version of RESSQ is included in the WHPA code (IGWMC
Key # 3943). Also, RESSQ is included in the groundwater data base
program GEOBASE (IGWMC Key # 8360) .
IGWMC Key: 3943 Model name: WHPA (Well Head Protection Area
delineation model)
Model category: saturated flow, stochastic simulation
Authors: Blandford, T.N., and P.S. Huyakorn
Current version: 2.2
Release date: 9/93
First released: 1990	IGWMC Check-date: 07/94
Institution of Model Development: HydroGeologic. Inc.
Herndon, VA 22070
Code Custodian: Blandford, T.N.
HydroGeologic, Inc.
1165 Herndon Parkway, suite 900, Herndon, VA 22070
Model Developed for: general use
Documentation: theory, user's guide, examples, verification
Model Testing: verification
Peer Review; concepts, theory, documentation
Availability: public domain, compiled (PC) version
Computer Requirements: IBM PC/AT, DOS 2.0, 640 Kb RAM, CGA
Abstract:
WHPA is an integrated program of analytical and semi-analytical solutions
for the groundwater flow equation coupled with pathline tracking. It is
designed to assist technical staff with delineation of wellhead protection
areas. Developed for the U.S. EPA's Office of Groundwater Protection, the
package includes modules for capture zone delineation in a homogeneous
aquifer with 2-dimensional steady-state flow with options for multiple
pumping/injection wells and barrier or stream boundary conditions, based
on the model RESSQ (IGWMC Key # 3940), among others. Aquifers may
be confined, semi-confined, or unconfined with areal recharge. Also
included are modules for Monte Carlo analysis of uncertainty and a
particle-tracking postprocessor for numerical flow models such as MODFLOW
and PLASM, using a two-dimensional rectangular grid. The model computes
capture zones, pathlines and hydraulic head distribution. It has
extensive on-screen and plotter graphic capabilities.
Remarks:
A GIS modeling interface for delineating Wellhead Protection Areas around
public water wells using the WHPA model and the SYSTEM 9 GIS
(ComputerVision) is discussed in: Rifai, H.S., L.A. Hendricks, K. Kilborn,
and P.B. Bedient. 1993. A Geographic Information System (GIS) User
Interface for Delineating Wellhead Protection Areas. Ground Water, Vol.
31 (3), pp. 480-488.
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IGWMC Key: 3944 Model name: VIRALT
Model category: saturated flow, unsaturated flow, virus transport
Authors: Park, N-£
Current version: 3.0
Release date: 9/94
First released: 1990
T.N. Blandford, and P.S. Huyakorn
IGWMC Check-date: 06/93
Institution of Model Development: HydroGeologic, Inc.
1165 Kerndon Parkway, Suite 900,
Herndon, VA 22070
Code Custodian: Blandford, T.N.
HydroGeologic, Inc.
1165 Herndon Parkway, suite 900, Herndon, VA 22070
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
general use, education
theory, user's guide, examples, verification
verification, code intercomparison
concepts, theory, accuracy, documentation
public domain, compiled (PC) version
IBM PC/AT, DOS 3.0, 640 Kb RAM, EGA/VGA
Abstract:
VIRALT is a modular semi-analytical and numerical code that simulates the
transport and fate of viruses in ground water. The code computes viral
concentrations in extracted water providing both steady-state and
transient transport including advection and dispersion in the vertical
direction in the unsaturated zone; along ground-water pathlines in the
saturated zone it handles adsorption and inactivation (die-off). Both
areal and line sources in (a two-dimensional areal representation of)
confined and unconfined aquifers can be accommodated. It also handles
barrier and stream boundary conditions. Pathlines in the unsaturated zone
are calculated analytically, in the saturated zone using the
Euler-Predictor-Corrector scheme. The one-D transport equation is solved
using the FEM. (see also remarks)
Remarks:
VIRALT has been developed for the U.S. Environmental Protection Agency,
Office of Water, Washington, D.C. VIRALT data input and output are
facilitated by a user-friendly, menu-driven interface with help screens.
Graphical output can be sent to a pen plotter or printer, or graphical
output can be saved in HPGL format for inclusion in advanced word
processing and desktop publishing programs.
IGWMC Key: 3945 Model name: CANVAS
Model category: saturated flow, unsaturated flow, virus transport
Authors: Park, N-S., T.N. Blandford, Y-S. Wu and P.S. Huyakorn
Current version: 1.0
Release date: 1/93
First released: 1993	IGWMC Check-date; 07/94
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Institution of Model Development: HydroGeologic, Inc.
1165 Herndon Parkway, Suite 900,
Herndon, VA 22070
Code Custodian: Blandford, T.N.
HydroGeologic, Inc.
1165 Herndon Parkway, suite 900, Herndon, VA 22070
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability;
Computer requirements:
general use
concepts and theory, test results, model setup,
input instructions, example problems
benchmarking (analyt. solutions), intercomparison
concepts, theory
public domain, compiled (PC) version
Intel 80386 based computer, 8 Mb RAM, 5 Mb disk
space, DOS 5.0, VGA, math coprocessor
Abstract:
CANVAS is a composite analytical-numerical (PE) code for simulation of
transport and fate of viruses in ground water. The code supports
transient one-dimensional vertical flow and transport in the unsaturated
zone and two-dimensional horizontal flow and transport in the saturated
zone. It takes into account advection and dispersion of viral particles
in the unsaturated and saturated zones, adsorption, inactivation (die-off)
and colloidal filtration. CANVAS may also be used for delineation of
ground-water pathlines and well capture zones. Both areal and line
sources of various shapes in unconfined or confined aquifers can be
accommodated. Barrier or stream boundary conditions that exist over the
entire aquifer depth can also- be simulated. CANVAS consists of various
modules. The USCOL module simulates the flow of ground-water and the
transport of viruses from a viral source to the water table. The viral
breakthrough curve at the water table computed with this module is used as
input for the LTG2D module. The USCOL module uses a semi-analytical
technique to solve the one-dimensional, steady-state flow equation
together with the Newton-Raphson method to find the non-linear roots of
the equation. . For the transport equation, a numerical approximation is
obtained using an upstream-weighted finite element method and linear
elements. Time integration is performed using a central difference
formulation. SZFLOW computes steady-state, two-dimensional (areal)
ground-water flow velocities within each (rectangular) finite element of
the specified grid. This module also delineates ground-water flow
pathlines and well capture zones. The modules uses the Laplace Transform
Galerkin (LTG) technique for solution of the flow equation. LTG2D
simulates two-dimensional transport of viruses in the saturated zone,
using output of USCOL and SZFLOW as input. Steady-state transport is
solved using the standard upstream-weighted residual finite element
scheme. In its present configuration, the model handles up to a 75 X 75
grid, 10 sources, 10 soil layers, 25 pumping wells, 5 recharging wells,
and 10 forward-tracked and 10 reverse-tracked pathlines.
Remarks:
The preprocessor, PRECV, allows the user to efficiently enter and edit input
data and includes the graphical construction of the finite element grid and
the placement and removal of multiple sources and pumping and injection
wells. The postprocessor, CVGRAF, allows the graphic presentation of
ground-water pathlines, viral breakthrough curves at the water table or at
pumping wells, and ground-water pressures and saturations in the
unsaturated zone beneath contaminant sources.
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IGWMC Key: 3950 Model name: INVERS
Model category; saturated flow, inverse model
Authors: Elderhorst, W.I.M.
Current version:
Release date: 1983
First released: 1982	IGWMC Check-date: 10/90
Institution of Model Development: TNO Institute for Applied Geoscience
P.O. Box 6012, 2600 uA Delft, The
Netherlands
Code Custodian: Elderhorst, W.I.M.
TNO Inst, of Applied Geoscience
P.O. Box 6012, 2600 JA Delft, The Netherlands
Model Developed for:	general use
Documentation:	theory, user's guide
Model Testing:
Peer Review:
Availability:	proprietary, purchase; source code
Computer requirements:	compiler
Abstract:
INVERS is a direct inverse model to calculate hydraulic resistance of
confining layers in a multi-layered aquifer with steady-state ground water
flow.
IGWMC Key: 3960 Model name: SEARCH
Model category: saturated flow, inverse model, stochastic simulation
Authors: Durbin,	T.J.
Current version:
Release date;	1983
First released:	1983	IGWMC Check-date: 11/93
Institution of Model Development: U.S. Geological Survey, Water Resources
Div.
Federal Bldg. Room W-2235, 2800 Cottage
Way, Sacramento, CA 95825
Code Custodian: Durbin, T.J.
Hydrologic Consultants, Inc.
1947 Galileo Ct., Davis, CA 95616
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
general use
theory, user's guide, examples
concepts, theory, documentation
public domain, source code
Computer requirements: compiler
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Abstract:
SEARCH is an inverse model for automatic identification of transmissivity
in an isotropic, heterogeneous, confined aquifer with steady-state two- or
threedimensional flow conditions. it is based on least squares fitting
of aquifer parameters or recharge/discharge rates using the
Gauss-Levenberg algorithm. The program calls the finite element
simulation codes FL0W2D or FL0W3D to compute sensitivity matrix.
IGWMC Key: 3980 Model name; MODFLOW
Model category: saturated flow
Authors: McDonald, M.G.
Current version: 1,31
Release date: 04/93
First released: 1983
and A.W. Harbaugh
IGWMC Check-date: 07/94
Institution of Model Development: U.S. Geological Survey, Water Resources
Div., National Center, Reston, VA 22092
Code Custodian: Harbaugh, A.W.
U.S. Geological Survey, Water Resources Div,
433 National Center, Reston, VA 22091
Model Developed for: research, general use, education
Documentation: concepts and theory, input instructions, model set
up, example problems, program structure
Model Testing: benchmarking, functionality testing, code
intercomparison, field testing
Peer Review: concepts, theory, coding, accuracy, documentation,
testing
Availability; public domain, source code, compiled {PC, Macintosh)
version
Computer Requirements: IBM PC/AT (small version), 640 Kb RAM, CGA; Intel
80386 based computers {large version), 4 Mb RAM,
math coprocessor, CGA; Macintosh; compiler for
larger version and other platforms
Abstract:
MODFLOW is a modular, block-centered finite difference model for the
simulation of two-dimensional and quasi- or fully-three-dimensional,
transient groundwater flow in anisotropic, heterogeneous, layered aquifer
systems. The model is based on a block-centered finite-difference
approach, using variable grid spacing in the x-, y-, and z-directions.
Layers may be confined, unconfined, semi-confined, or convertible between
the two conditions. The model includes modules for flow towards wells,
through riverbeds, and into drains. Other modules handle
evapotranspiration and recharge. MODFLOW has a full implementation of
first, second, and third type boundary conditions. It calculates heads,
fluxes, and water balance. Various textual and graphic pre- and
postprocessors are available. Additional simulation modules are made
available by the authors and by third parties (see remarks).
Remarks:
BCF1 is the block-centered finite difference module described in the
original documentation of the MODFLOW model (McDonald and Harbaugh, 1988;
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see references). BCF2 is a version of the BCF module described by
McDonald et al., 1991. BCF3 is a version of the BCF module described by
Goode and Appel, 1992.
A computer program to summarize the data input and output from MODFLOW is
described by Scott (1990; see references)» This program, the Modular
Model Statistical Processor, provides capabilities to easily read data
input to and output from MODFLOW, calculate descriptive statistics,
generate histograms, perform logical tests using relational operators,
calculate data arrays using arithmic operators, and calculate flow vectors
for use in a graphical display program. The program is written in Fortran
77 and tested on a Prime 1/model 9955-11.
STR1 is a computer program written for use in MODFLOW to account for the
amount of flow in streams and to simulate stream-aquifer interaction. The
program is known as the Streamflow Routing Package (Prudic 1989,* see
references.) (see also IGWMC Key # 3896).
The computer program ZONEBUDGET (Harbaugh 1990; see references), which is
written in FORTRAN, calculates sub-regional water budgets using results
from the USGS MODFLOW model. ZONEBUDGET uses cell-by-cell flow data saved
by MODFLOW in order to calculate the budgets. Sub-regions of the modeled
region are designated by zone numbers. The user assigns a zone number fro
each cell in the model. Composite zones can also be defined as
combinations of the numeric zones, (see IGWMC Key # 3989).
PCG2 (Hill 1990; see references) is a numerical code to be used with the
USGS MODFLOW model. It uses the preconditioned conjugate-gradient method
to solve the equations produced by the MODFLOW model. Both linear and
nonlinear flow conditions may be simulated. PCG2 includes two
preconditioning options: modified Cholesky preconditioning and polynomial
preconditioning. Convergence of the solver is determined using both
head-change and residual criteria. Nonlinear problems are solved using
Picard iterations. This solver is included in various extended memory PC
versions.
TLK1 is a MODFLOW module for simulating transient leakage in confining
units. In MODFLOW, confining units commonly are simulated without
consideration of storage changes in the confining units (in the quasi-3D
mode), or by representing the confining units with one or more layers
(fully-3D mode). In the Transient-Leakage Package, developed by the U.S.
Geological Survey (Leake et al., 1994? see MODFLOW references), equations
describing flow across the top and bottom of each confining unit are
solved and the flow terms added to the finite difference equations of
MODFLOW.
A computer program for simulating aquifer-system compaction resulting from
groundwater storage changes in compressible beds has been published by
Leake and Prudic (1988; see references). This program can be incorporated
in MODFLOW as the INTERB1D-STORAGE-PACKAGE. (see also IGWMC Key # 3985) .
A modification to the USGS MODFLOW model (Reilly and Harbaugh 1993; see
references) provides the option to simulate cylindrical (axisymmetric) flow
to a well through a series of concentric shells decreasing in area towards
the well. The axisymmetric option is implemented as preprocessor (RADMOD),
preparing the required MODFLOW input data file.
There are two parameter optimization programs for MODFLOW; MODI In V (see
IGWMC key 3981) and MODFLOWP (see IGWMC key 3987).
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MODPATH: a particle-tracking program developed by the USGS for use with
the MODFLOW model, MODPATH calculates the path a particle would take in a
steady-state three-dimensional flow field in a given amount of time. It
operates as a post-processor for MODFLOW using heads, cell-by-cell flow
terms and porosity to move each particle through the flow field. The
program handles both forward and backward particle tracking. (See also
IGWMC Key 3984} .
MODPATH- PLOT: a graphic display program for use with MODPATH - PC. It uses
the Graphical Kernel System (GKS) to produce graphical output on a wide
range of commonly used printers and plotters. MODPATH-PLOT comes with
MODPATH.
PATH3D is a general particle tracking program for calculating groundwater
paths and travel times. The program uses the head solution of the USGS
modular finite difference model MODFLOW. The program is available from:
S.S. Papadopulos and Assoc., Inc., 12250 Rockville Pike, Suite 290,
Rockville, Maryland 20852
There are two models for three-dimensional, non-conservative solute
transport which use MODFLOW for generating head distributions, which
then are used to compute velocities: 1} MT3D, which is based on various
implementations of the method of characteristics (IGWMC Key # 4970) ; and
2) RAND3D, which is based on the random walk method (IGWMC Key # 2691) .
Both programs have extensive particle tracking and graphic capabilities.
MODELCAD is a graphical oriented, model - independent pre-processor to
prepare and edit input files for two- ana three-dimensional groundwater
models, including aquifer properties, boundary conditions, and grid
dimensions. The program prepares input files for MODFLOW, MOC, PLASM and
RANDOM WALK, among others. File formatting routines for other models are
available upon request. (see IGWMC Key # 6690)
Processing MODFLOW (PM) is a proprietary, easy-to-use graphic pre- and
postprocessor and run-time shell for MODFLOW, MODPATH, and MT3D developed
by W-H. Chiang and W. Kinzelbach. The module PATHLINE uses the MODPATH
results for display on screen or saving as HPGL or DXF file. ISOLINE
draws contours for heads and drawdowns, FLOW computes the waterbalance for
a subregion of MODFLOW, and I'MHT draws curves for heads versus time,
(see IGWMC Key # 8550).
PREMOD, MODINP and PREPR03FL0 are textual input processors for creating
and editing MODFLOW data files. Extended memory versions include options
for various add-on MODFLOW packages, e.g. BCF2, STR1 and PCG2. PREMOD has
been prepared by GeoTrans, Inc. for the Internat. Ground Water Modeling
Center, and is available from IGWMC. The proprietary GeoTrans version is
called PREPR03FL0. MODINP has been prepared by TECSOFT, Inc. and is
available from Scientific Software Group.
GIS\Key is an environmental data base management system that produces
geologic cross-sections, boring logs, potentiometric maps, isopleths maps,
structure maps, summary tables, hydrographs, chemical time series graphs,
and other information. This GIS system provides for MODFLOW integration
through pre- and postprocessors. The MODFLOW grid might be designed using
the graphic interface of GIS\Key and overlaying the base map with grid
arrays. For more information contact GIS Solutions Inc., 1800 Sutter
Street, Suite 830, Concord, CA 94520, phone (510)827-5400; fax
(510)827-5467.
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MACMODFLOW: this is the Macintosh implementation of the MODFLOW model. It
supports the standard Macintosh user-interface. The simulation code is
integrated with the input data editor and the graphic post-processor.
Extensive data checking is employed and simulation stops are trapped with
control returning to the program. Graphic functions include contouring of
heads, drawdowns, hydraulic conductivity, transmissivity, and plots of the
finite difference grid. This version of MODFLOW is available from
Scientific Software Group.
MODLOCAL consists of two programs: MODLOCAL to create a local MODFLOW
model as a subset of a larger regional MODFLOW model, and MODGROW to
expand the selected domain to create a finer grid for the selected local
area. MODLOCAL is available from the Scientific Software Group.
MODVEL is a routine that takes the unformatted head files produced by
MODFLOW and calculates two-dimensional groundwater velocity vectors. The
velocity vectors may be displayed using MODGRAF, a graphic output
processor. Both programs have been prepared by Tecsoft, Inc. and are
available from the Scientific Software Group.
MODCELL calculates the cell-by-cell water balance terms in MODFLOW using
the MODFLOW input files and the calculated heads. The program is
available from the Scientific Software Group.
To use MODFLOW to approximate varying density groundwater flow, C. Maas
and M.J. Emke (1989; Solving Varying Density Groundwater problems with a
Single Density Computer Program, Proc. 10th SWIM, Ghent, Belgium, 1988)
proposed a method based on transformation of the input data and boundary
conditions. Varying densities are considered soil matrix properties (not
fluid properties) and are not being redistributed. Contact IGWMC-US for
copy of paper.
MODGRAF: a program developed by TECSOFT, INC, to provide graphics
capability for MODFLOW. The menu-driven MODGRAF program uses the output
from MODFLOW to automatically contour heads and drawdowns from each layer,
stress period and time step and superpose velocity vectors on the head
contour plots. The program requires TECSOFT's TRANSLATE program. A
special 80386/486 version is available. Contact Scientific Software Group.
A MS Windows-based version of MODFLOW, called Graphic Groundwater, is
described in IGWMC Key # 7031. This package includes a graphic pre- and
postprocessor and has been prepared by Micro-innovations, Inc.
IGWMC Key: 3981 Model name: MODINV - MODFLOW Parameter Optimization
Model category: saturated flow, inverse model
Authors: Doherty, J., R.E. Volker, and R.G. Pearson
Current version: 1.0
Release date: 10/90
First released: 1990	IGWMC Check-date: 01/93
Institution of Model Development: James Cook Univ., Australian Centre for
Tropical Freshwater Research
Townsville, Qld 4811, Australia
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Code Custodian; Doherty, J.
James Cook Univ., Australian Centre for Tropical
Freshwater Research
Townsvilie, Qld 4811, Australia
Model Developed for:
Documentation:
Model Testing:
Peer Review;
Availability;
research, general use
theory, user's guide,
examples
proprietary, purchase; source code, compiled (PC)
version
Computer Requirements; IBM PC/AT {small version), DOS 2,1, 640 Kb RAM, CGA,
math coprocessor; compiler for larger versions and
other platforms
Abstract:
MODINV is a parameter optimization program based on the USGS
three-dimensional modular flow model MODFLOW. It accepts a wide variety
of MODFLOW parameters for optimization, including recharge rates,
hydraulic conductivity, transmissivity, EVT extinction depth, etc. The
program requires preliminary parameters zoning and is based on the
matching of calculated and observed heads according to a weighted least
squares criterion. Optimization is achieved using the Gauss-Marquardt
method. The program comes with a forward simulation version of MODFLOW
and pre- and postprocessors including a mesh generation routine.
IGWMC Key; 3982 Model name: PATH3D
Model category; saturated flow
Authors: Zheng, C.
Current version: 3.2
Release date: 10/92
First released: 1988	IGWMC Check-date: 07/94
Institution of Model Development: Wisconsin Geological and Natural
History Survey, Univ. of Wisconsin
Madison, Wisconsin
Code Custodian: Andrews, C.B.
S.S. Papadopulos & Assoc., Inc.
7944 Wisconsin Ave., Bethesda, MD 20814
Model Developed for: general use
Documentation; theory, user's guide, examples, verification
Model Testing: verification
Peer Review; concepts, theory
Availability: proprietary, license? compiled {PC, Macintosh)
version
Computer Requirements.- IBM PC/AT, DOS 2.1, 640 Kb RAM, CGA/EGA/VGA;
Macintosh
Abstract;
PATH3D is a general particle tracking program for calculating groundwater
paths and travel times in steady-state or transient, two- or
three-dimensional flow fields. The program can be used to simulate the
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movement of ground-water and the advection of contaminant solute in
ground-water. The program is particularly useful for delineating
contaminant capture zones or well-head protection zones. PATH3D can serve
as a valuable extension to ground-water flow models which in themselves do
not provide quantitative information on flow paths and travel times, or as
a practical alternative to contaminant transport models in cases where
they are not feasible due to budget constraints or the lack of chemical
data,
PATH3D includes two major segments: 1) a velocity interpolator which
converts hydraulic heads calculated at discretized nodal points into a
velocity field in which the velocity in a given time step is determined
as a function of position (x, y,z); and 2) a numerical solver for tracking
the movement of fluid particles. In the first segment, PATH3D uses a
velocity scheme which is consistent with the block-centered
finite-difference representation of the three-dimensional ground-water
flow equation and conserves mass locally within each finite-difference
cell. In the second segment, PATH3D uses a fourth-order Runge-Kutta
solution capable of automatic step size adjustment to achieve
pre- determined accuracy with minimum computational effort.
PATH3D uses the head solution of the U.S. Geological Survey modular
three-dimensional finite-difference ground-water flow model MODFLOW. This
allows flexibility in handling a wide range of field problems, including
the presence of wells, drains, rivers, recharge, and evapotranspiration,
and permits representation of a variety of boundary conditions. The input
files and resulting head file of MODFLOW are directly used by PATH3D.
However, PATH3D can also be modified to work in conjunction with any other
block-centered finite-difference flow model, if desired.
IGWMC Key: 3983 Model name; MODMAN (MODflow MANagement)
Model category: saturated flow, management/optimization
Authors: Greenwald, R.M.
Current version: 3.02
Release date: 01/94
"First released: 1989	IGWMC Check-date: 07/94
Institution of Model Development: GeoTrans, Inc,
46050 Manekin Plaza, Suite 100,
Sterling, VA 22170
Code Custodian: Greenwald, R.
GeoTrans, Inc.
46050 Manekin Plaza, Suite 100, Sterling, VA 22170
Model Developed for: general use
Documentation: theory, user's guide, examples, program structure
Model Testing:
Peer Review:
Availability: public domain, source code, compiled (PC) version
Computer Requirements: Intel 80386 based computer, 4 Mb RAM, CGA, math
coprocessor; compiler and MPS compatible
optimization package (e.g., LINDO) for other
platforms
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Abstract:
MODMAN is a program developed to add management capability to the "JSGS
modular 3-D flow model MODFLOW. MODMAN in conjunction with optimization
software, provide optimal locations of pumping and injection wells and
optimal pumping or recharge rates for these wells. The optimal solution
maximizes or minimizes a user-defined objective function, such as
minimizing or maximizing well rates, heads, or drawdowns, and satisfies
all user-defined constraints, such as upper and lower limits on heads,
gradients, pumping rates, and number of wells. MODMAN utilizes the
response matrix technique to transform the groundwater management problem
into a linear or mixed-integer program. The MODMAN program contains a
special version of the MODFLOW program that is designed to link with the
MODMAN and LINDO programs. Calibrated 2-D or 3-D MODFLOW input files are
required for the optimization. MODMAN uses the IGWMC version of MODFLOW.
Parameters specific to the optimization procedure are defined in MODMAN.
The actual optimization calculations are completed by the LINDO program in
a two step process. In the first step, the MODMAN program is linked with
the MODFLOW input files to create an input file for the LINDO solver. The
LINDO program is then executed to perform optimization based on the
user-specified parameters. In the second step, MODMAN is executed for
post-processing of optimization results. An error file is created by
MODMAN in both steps that may be used in trouble-shooting final output.
The program is based on the USGS AQMAN model, and requires an the external
op t xmiz a11on program LINDO»
Remarks:
The MODMAN code is an extension of the USGS AQMAN code by Lefkoff and
Georelick (1987; see IGWMC Key # 3092). MODMAN is more comprehensive than
AQMAN, offering a large variety of management options and input/output
features not available with the AQMAN code.
MODMAN was originally developed by GeoTrans for the Southern Florida Water
Management District (SFWMD) in 1989-1990. A version of the code was
developed by GeoTrans for the EPA/RSKERL, Ada, Oklahoma, and includes
features for the solution o£ groundwater management problems related to
plume containment and plume removal.
IGWMC Key: 3984 Model name: MODPATH
Model category: saturated flow
Authors: Pollock, D.W.
Current version: 1.2
Release date: 04/90
First released: 1988	IGWMC Check-date: 07/94
Institution of Model Development: U.S. Geological Survey, Water Resources
Div., National Center, Reston, VA 22092
Code Custodian: Pollock, D.W.
U.S. Geological Survey, Water Resources Div.
411 National Center, Reston, VA 22092
Model Developed for: general use
Documentation: theory, user's guide, examples, program structure
Model Testing:
Peer Review:	concepts, theory, documentation
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Availability: public domain, source code, compiled IPC) version
Computer Requirements: Intel 80386 based computer, 4 Mb RAM, math
coprocessor, CGA/VGA; compiler and GKS or DISSPLA
graphics library for other platforms
Abstract:
MODPATH is a post-processing package to compute three-dimensional
pathlines based on the output from steady-state simulations obtained with
the USGS MODFLOW groundwater flow model. The package consists of two
FORTRAN 77 computer programs: 1) MODPATH, which calculates pathlines, and
2} MODPATH-PLOT, which presents results graphically. MODPATH uses a
semi-analytical particle tracking scheme, based on the assumption that
each directional velocity component varies linearly within a grid cell in
its own coordinate direction. This assumption allows an analytical
expression to be obtained describing the flow path within a given grid
cell. Given the initial position of a particle anywhere in a cell, the
coordinates of any other point along its pathline and time of travel
between them can be directly computed. MODPATH-PLOT graphically
displays results generated by the three-dimensional particle tracking
program MODPATH. Either the DISSPLA graphics libraries or the Graphic
Kernel System (GKS) is linked to the MODPATH-PLOT source code to generate
graphical output.
Remarks:
MPATHIN is a textual input processor for MODPATH, prepared by TECSOFT,
Inc. and available from Scientific Software Group.
Processing MODFLOW (PM) is a proprietary, easy-to-use graphic pre- and
postprocessor and run-time shell for MODFLOW, MODPATH and MT3D, developed
by W-H. Chiang and W. Kinzelbach. The module PATHLINE uses the MODPATH
results for display on screen or saving as HPGL or DXF file. ISOLINE
draws contours for heads and drawdowns, FLOW computes the waterbalance for
a subregion of MODFLOW, and PMHT draws curves for heads versus time.
IGWMC Key; 3985 Model name: MODFLOW - INTERBED STORAGE PACKAGE
Model category: saturated flow, deformation
Authors: Leake, S.A., and D.E. Prudic
Current version:
Release date: 1991
First released: 1988	IGWMC Check-date; 05/92
Institution of Model Development: U.S. Geological Survey, Water Resources
Div., Tucson, Arizona
Code Custodian: U.S. Geological Survey, Water Resources Div.
Federal Building, FB-44, 300 West Congress Street,
Tucson, AZ 85701-1393
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
general use
theory, user's guide, examples, program structure,
code listing, verification
verification, code intercomparison
concepts, theory, documentation
public domain, source code
comp i1e r, MODF LOW
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Abstract:
The MODFLOW - IKTSRBED STORAGE PACKAGE is a computer program for
simulating aquifer-system compaction resulting from groundwater storage
changes in compressible beds induced by groundwater withdrawal. The
storage changes might occur from both elastic and inelastic compaction.
The program is written as a module to be incorporated in the finite
difference flow simulator MODFLOW (McDonald-Harbaugh). Elastic compaction
is assumed to be proportional to change in head. Similarly, inelastic
compaction is assumed to be proportional to decline in head.
IGWMC Key: 3986 Model name: STR1 (MODFLOW Strearr.flow Routing Package}
Model category: ground-/surface-water hydraulics
Authors: Prudic, D.E.
Current version:
Release date: 1989
First released: 1989	IGWMC Check-date: 03/91
Institution of Model Development: U.S. Geological Survey, Water Resources
Div., Carson City, Nevada 89701
Code Custodian: Prudic, D.E.
U.S. Geological Survey, Water Resources Div.
Federal Building, Room 224, 705 N. Plaza Street, Carson
City, NV 89701
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer requirements:
general use
theory, user's guide, examples, program structure,
code listing, verification
verification
concepts, theory, documentation
public domain, source code, compiled (PC) version
Intel 803 86 based computer, 4 Mb RAM, CGA, math
coprocessor, MODFLOW; compiler for other platforms
Abstract:
STRl (Streamflow Routing Package) is a computer program to account for the
amount of flow in streams and to simulate the interaction between surface
streams and groundwater. The program is used by incorporating it in the
USGS FDflow model MODFLOW. The program limits the amount of groundwater
recharge to the available streamflow. It permits two or more streams to
merge into one with flow in the merged stream equal to the sum of the
tributary flows. The program also permits diversions from the streams.
Leakage is calculated for each reach (corresponding with individual FD
cells) based on head difference between stream and aquifer and a
conductance term. Tne stage m each reach can be computed usxng the
Manning formula for a rectangular stream channel.
IGWMC Key: 3987 Model name: MODFLOWP
Model category: saturated flow, inverse model
Authors: Kill, M.C.
Current version: 1.7
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Release date: 02/93
First released: 1992
IGWMC Check-date: 07/94
Institution of Model Development: U.S. Geological Survey, Water Resources
Div., Federal Center, Denver, CO 80225
Code Custodian: Hill, M.C.
U.S. Geological Survey, Water Resources Div.
Box 25046, 413 Federal Center, Lakewood, CO 80225-0046
Model Developed for:
Documentation:
research, general use, education
4- l-i cs rsT-tJ" n cqt* ' cs rfn i	ovaTTiT^l o c nTn/tTam ef rnfl-iirci
L-ii w L/X jf f UOCl o y lix LlvS i GyVO-iu^-/ X CO ; ir'X Uy X Ct i II fc>L-XU.V^L-LlX *5 /
code listing, verification
Model Testing: verification, field datasets
concepts, theory, documentation
public domain, source code
compiler
Peer Review:
Availability:
Computer Requirements:
Abstract:
MODFLOWP is an extension of the USGS modular, 3-D finite difference flow
model MODFLOW incorporating the new Parameter-Estimation Package. The
model can be used to estimate various MODFLOW parameters by nonlinear
regression. Parameters are estimated by minimizing a weighted
least-squares objective function by the modified Gauss-Newton method or by
a conjugate direction method. Any spatial variation in parameters can be
defined by the user. Parameters used to calculate the following MODFLOW
model inputs can be estimated: transmissivity and storage coefricxent of
confined layer; hydraulic conductivity and specific yield of unconfined
layers; vertical leakance; vertical anisotropy, horizontal anisotropy,
hydraulic conductance, areal recharge rates; maximum evapotranspiration;
pumping rates; and the hydraulic head at constant-head boundaries. Data
used to estimate parameters can include existing independent estimates of
parameter values, observed hydraulic heads or temporal changes in heads,
and observed gains and losses along head-dependent boundaries. Model
output includes statistics for analyzing the parameter estimates and the
model. These statistics can be used to quantify the reliability of the
resulting model, to suggest changes in model construction, and to compare
results of models constructed in different ways. The performance of the
code has been tested in models of both actual and hypothetical groundwater
systems.
IGWMC Key: 3988 Model name: MOD3DFD/MODLMAKR
Model category: saturated flow, pre-/postprocessing
Authors: Spinks, M.P.
Current version: 3.0/2.0
Release date: 1994
First released:	IGWMC Check-date: 06/94
Institution of Model Development: Microcode, Inc., Albuquerque, NM
Code Custodian: Spinks, M.P.
Microcode, Inc, 12136 Calle Zagal NE, Albuquerque, NM 87111
Model Developed for: general use
Documentation:
Model Testing:
Peer Review:
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Availability: proprietary, purchase? compiled (PC) version
Computer Requirements: IBM PC/AT, 640 Kb RAM, EGA/VGA/SVGA
Abstract:
MOD3DFD is an implementation of the MODFLOW model of the USGS, including
the river routing package for modeling surface flows and
groundwater-surface water interaction (see MODFLOW annotation). MOD3DFD
is distributed with MODLMAKR, a graphical interactive preprocessor for
flow and solute transport models (including USGS-MOC!, MODLMAKR is
separately available.
Remarks:
MOD3DFD includes a fully graphical and interactive preprocessor MODLMAKR
for groundwater flow and solute transport models. MODLMAKR is designed
for 386/486 or Pentium based computers. It can create and modify data
file for many popular models including MODFLOW and MOC. Models can be
designed using a mouse, keyboard, or supported digitizers.
MOD3DFD (Version 3.0) is an enhanced version of MODFLOW for 386/486 and
Pentium based computers. It uses the Phase Lap TNT DOS-Extender
technology and pure 32 bit code to run huge models at workstation speed.
It has a River Routing Package for greater flexibility modeling surface
water flow and ground-water/surface water interaction. It produces
graphics input files enabling graphical display of model results on the
screen and on ink jet, laser, or dot matrix printers and pen plotters.
IGWMC Key; 3989 Model name: ZONEBDDGET
Model category: saturated flow
Authors: Harbaugh, A.W.
Current version: 1.1
Release date: 4/93
First released: 1990	IGWMC Check-date: 07/94
Institution of Model Development: U.S. Geological Survey, Water Resources
Div., National Center, Reston, VA 22092
Code Custodian: Harbaugh, A.W.
U.S. Geological Survey, Water Resources Div.
433 National Center, Reston, VA 22091
Model Developed for:
Documen tation:
Model Testing:
Peer Review:
Availability:
Computer requirements:
general use
functional design, input instructions,-
problem
example
concepts
public domain, source code, compiled (PC) version
Intel 80386 based computer, 2 Mb RAM, math
coprocessor, CGA; compiler for other platforms
Abstract:
ZONEBUDGET calculates subregional water budgets (of volumetric flow rates)
using results from the U.S. Geological Survey Modular Three-Dimensional
Finite-Difference Ground-Water Flow Model (MODFLOW). The program
calculates budgets by tabulating the (binary) budget data that MODFLOW
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produces using the cell-by-cell option. Subregions are designated by zone
numbers. The user assigns a zone number for each cell in the model to
specify the subregions for which budgets will be calculated. Composite
zones can also be defined as combinations of the numeric zones.
IGWMC Key: 3990 Model name: DSC (Discrete Compartment Model)
Model category: chemical mass balance
Authors: Campana, M.E., and E.S. Simpson
Current version:
Release date: 1975
First released: 1975	IGWMC Check-date: 07/84
Institution of Model Development: Univ. of Arizona, Dept. of Hydrology
and Water Resources, Tucson, AZ 85721
Code Custodian: Campana, M.E.
Univ. of New Mexico, Dept. of Earth and Planetary Sc.
Albuquerque, NM 87131
Model Developed for; research, general use
Documentation: theory
Model Testing:
Peer Review:
Availability:	public domain, source code
Computer requirements:	compiler
Abstract:
DSC is a mass balance model to evaluate solute transport in a
three-dimensional steady-state flow system based on mixing-in-a-cell
approach to estimate residence times and solute fluxes in a heterogeneous
aquifer system.
IGWMC Key: 4011 Model name: Injection Model
Model category: fresh/salt water flow
Authors: Laux, S.J., and B.A. Benedict
Current version:
Release date: 8/84
First released: 1984	IGWMC Check-date: 06/93
Institution of Model Development: Florida Water Resources Center, Univ.
of Florida, Oainsville, Florida
Code Custodian: Benedict, B.A., or H. Rubin
Univ. of Florida, Dept. of Civil Eng.
Gainsville, FL 32611
Model Developed for: research, general use
Documentation:
Model Testing:
Peer Review:
Availability:
Computer requirements: compiler
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Abstract:
This is a combined numerical/analytical model for simulation of injection
into a leaky-confined density-stratified aquifer. The model uses the
Hantush equation to compute drawdowns in the fresh water zone, assumes
vertical flow in the salt-water zone, and uses an IADI finite difference
technique combined with an integral boundary technique resulting in a
simplified description of the density-coupled flow and solute transport in
the varying density transition zone between fresh and saline layers. The
model can be used for preliminary assessment of the effects of injection
of fresh water at the top of an aquifer on the position of the fresh/salt
water interface in the aquifer.
IGWMC Key: 4020 Model name: Fresh Water Lens
Model category: saturated flow, fresh/salt water flow
Authors: Ayers, J.F., and H.L. Vacher
Current version;
Release date:
First released: 1980	IGWMC Check-date: 06/92
Institution of Model Development: unknown
Code Custodian: Ayers, J.F.
Univ. of Guam, Water and Energy Res. Inst., UOG Station
Mangilao, Guam 96913
Model Developed for: general use
Documentation:
Model Testing:
Peer Review:
Availability:
Computer requirements: compiler
Abstract:
A finite difference model to predict transient two-dimensional areal
behavior of a fresh water lens on top of a stagnant salt water body in an
isotropic, heterogeneous, water table aquifer.
IGWMC Key: 4070 Model name: GWUSER/CONJUN
Model category: saturated flow, management/optimization
Authors: Kolterman, C.R.
Current version:
Release date: 11/S3
First released: 1983	IGWMC Check-date; 09/90
Institution of Model Development: Water Resources Center, Desert Research
Institute, Univ. of Nevada System
Reno, Nevada
Code Custodian: Kolterman, C.R.
Desert Research Institute, Water Resources Res. Center
P.O. Box 60220, Reno, NV 89506
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Model Developed, for: research, general use
Documentation: theory, user's guide
Model Testing:
Peer Review:
Availability: public domain, source code
Computer Requirements: compiler, XMP optimization package
Abstract:
GWUSER/CONJUN is a combined simulation-optimization model to determine
optimal pumping locations and pumping rates for a confined aquifer with or
without artificial recharge (GWUSER) or to determine the optimal
conjunctive use of an aquifer-stream system (CONJUN). The simulation model
is based on a finite difference approximation of transient groundwater
flow and linear programming solution of the optimalization problem.
Remarks:
The model GWUSER is for the optimization of the exploitation of a single
aquifer, while the model CONJUN is designed to optimize the conjunctive
use of a stream-aquifer system. The model requires the XMP (Experimental
Mathematical Program) package residing on the host computer and described
in: "R. Marsten (1981) . The Design of the XMP Linear Programming Library.
ACM Transactions on Mathematical Software, vol.7(4), p.481-497".
IGWMC Key: 4081 Model name: TRIPM
Model category: saturated flow, solute transport
Authors: Gureghian, A.3.
Current version:
Release date: 1983
First released: 1983	IGWMC Check-date: 09/90
Institution of Model Development: Battelle Project Mngt. Div., Off.
Nuclear Waste Isolation
505 King Ave., Columbus, OH 43201
of
Code Custodian:
Code custodian
Performance Assessment Dept., Off. of Nuclear Waste
Isolation, Battelle Project Management Div., 505 King
Avenue, Columbus, OH 43201
Model Developed for: research, general use
Documentation: theory, user's guide, examples, program structure,
code listing, verification
verification
concepts, theory, coding, documentation
public domain, source code
compiler
Model Testing;
Peer Review:
Availability:
Computer Requirements:
Abstract;
TRIPM is a two-dimensional finite element model to predict the transport
of radionuclides decay chain in a phreatic aquifer. It simulates the
simultaneous cross-sectional flow water and the transport of reacting
solutes through saturated and unsaturated porous media. The influence of
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soil-water pH on the distribution coefficient is included. Boundary
conditions include seepage faces.
Remarks:
For those users having access to the DISSPLA package at their computer
facility, the program is capable of generating a graphical interpretation
of the computed results, including contours and velocity vector plots.
IGWMC Key: 40B2 Model name: LAYFLO
Model category; solute transport
Authors: Gureghian, A.B., and G. Jansen
Current version:
Release date; 1983
First released: 1983	IGWMC Check-date: 09/90
Institution of Model Development: Battelle Office of Crystalline
Repository Development
505 King Ave., Columbus, OH 43201
Code Custodian: Code custodian
Performance Assessment Dept., Off. of Nuclear Waste
Isolation, Battelle Project Management Div., 505 King
Avenue, Columbus, OH 43201
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer requirements:
research, general use
theory, user's guide, examples, program structure,
code listing, verification
verification, field datasets
concepts, theory, documentation
public domain, source code
compiler, DISSPLA graphics package optional
Abstract:
LAYFLO is a one-dimensional, semi-analytical model for simulation of the
migration of a three-member radionuclide decay chain in a multi-layered
geologic porous medium. The governing differential equation is solved
using Laplace transformation. The model allows for two types of boundary
conditions, i.e. a continuous source as well as a band release mode,
respectively. The solution of the non-dispersive form of the mass
transport equation can handle any number of layers, whereas for the
general case the number of layers is restricted to six. A graphics
program using the DISSPLA package is provided with the LAYFLO code.
IGWMC Key: 4083 Model name: FRACFLO
Model category: solute transport, stochastic simulation, fracture network
Authors: Gureghian, A.B.
Current version:
Release date: 7/90
First released: 1990	IGWMC Check-date: 12/90
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Institution of Model Development: Battelle Energy Systems Group, Off. of
Waste Techn. Developm.
Willowbrook, IL 60521
Code Custodian: Code Custodian
Battelle Memorial Inst., Off. of Waste Technology
Developm., 7000 South Adams Street, Willowbrook, IL 60521
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer requirements:
research, general use
theory, examples, verification
verification
concepts, theory
public domain, source code
compiler, DISSPLA graphics library
Abstract;
The FRACFLO code computes the two-dimensional, space-time-dependent,
convective-dispersive transport of a single radionuclide in an unbound
single or multiple parallel fracture system with constant aperture. It
handles the one-dimensional diffusive transport into the rock matrix, as
well as the mass flux at any point in the fracture. Steady-state
isothermal groundwater flow and parallel streamlines are assumed in the
fracture, and the rock matrix is assumed to be fully saturated with
immobile water. The model can handle a single or multiple finite patch
source or a Gaussian distributed source subject to a step or band release
mode. The differential equations are solved by Laplace and Fourier
transforms and a Gauss-Legendre integration scheme.
IGWMC Key: 4100 Model name: MODFE/PEMOD
Model category: saturated flow
Authors: Torak, b., and R.L. Cooley
Current version:
Release date: 1992
First released: 1985	IGWMC Check-date: 01/93
Institution of Model Development: U.S. Geological Survey, Water Resources
Div., Federal Center, Denver, CO 80225
Code Custodian: Torak, L.J.
U.S. Geological Survey, Water Resources Div.
411 National Center, Reston, VA 22092
Model Developed for: general use
Documentation: theory, user's guide, examples, program structure,
code listing, verification
verification, synth. datasets, code intercomparison
concepts, theory, documentation
public domain, source code
compiler
Model Testing:
Peer Review:
Availability:
Computer Requirements:
Abstract:
MODFE is a modular finite element model to solve two-dimensional planar or
axisymmetric, steady-state or transient groundwater flow in (leaky)
confined or unconfined, heterogeneous and anisotropic aquifers. It uses
triangular elements with linear basis functions and the extended Galerkin
method of weighted residuals. Boundary conditions may be specified as a
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point, line, or areally distributed sources or sinks, depending on the
nature of the field problem. Fluxes from these boundaries may be
specified, or may be computed as a function of hydraulic head during the
simulation (3rd type b.c.). Spatially distributed parameters 'may be
specified for individual elements or for zones of elements.
Finite-element matrix equations are solved by the direct
symmetric-Doolittle method of the iterative modified, incomplete-Cholesky
conjugate-gradient method.
Remarks:
MODFE emphasizes a modular approach where simulation capabilities and
matrix solvers can be changed easily by adding, deleting, modifying, or
reordering subroutines. Solvers available include; 1) direct,
symmetric-Doolitle method, 2) direct, triangular-decomposition method, and
3} iterative MICCG {conjugate gradient) method. The model allows decrease
of aquifer thickness to zero when water table falls, and increase of
thickness from zero when water table rises (desaturation/resaturation).
It also handles head-dependent fluxes from springs, drainage wells, and
riverbeds.
IGWMC Key: 4140 Model name: MLSOIL/DFSOIL
Model category; solute transport
Authors: Sjoreen, A.L.,
Current version:
Release date: 11/84
First released: 1984
D.C. Kocher, G.G. Killough, C.W. Miller, et al.
IGWMC Check-date: 12/9 0
Institution of Model Development: Oak Ridge Nat. Lab., Environm. Sciences
Div., Oak Ridge, Tennessee 37831
Code Custodian; Sjoreen, A.L.
Oak Ridge Nat. Laboratories, Health and Safety Res. Div.
Oak Ridge, TN 37 831
Model Developed for:
Documentation:
general use
theory, user's guide, examples, program structure,
code listing, verification
Model Testing: verification
Peer Review: concepts, theory, documentation
Availability: public domain, source code
Computer requirements: compiler
Abstract:
MLSOIL (Multi-Layer SOIL model) calculates an effective ground surface
concentration to be used in computations of external doses. The program
implements a five compartment linear-transfer model to calculate the
concentrations of radionuclides in the soil following deposition on the
ground surface from the atmosphere. The model considers leaching through
the soil as well as radioactive decay and buildup. DFSOIL calculates the
dose in air per unit concentration at 1m above the ground from each of the
five soil layers used in MLSOIL and the dose per unit concentration from
an infinite plane source. MLSOIL and DFSOIL are part of the Computerized
Radiological Risk Investigation System (CRRIS).
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IGWMC Key; 4150 Model name: FD/FE Darcy Velocities
Model category: water level conversion
Authors: Batu, V.
Current version:
Release date: 1/84
First released: 1984	IGWMC Check-date: 06/92
Institution of Model Development: Nus Corporation
• Park West Two, Cliff Mine Road,
Pittsburgh, PA 15275
Code Custodian: Batu, V.
Nus Corporation
Park West Two, Cliff Mine Road, Pittsburgh, PA 15275
Model Developed for; general use
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements; compiler
Abstract:
Calculation of Darcy velocities in non-homogeneous and anisotropic
aquifers.
IGWMC Key: 4170 Model name; 2D SAT/UNSAT FLOW
Model category: saturated flow, unsaturated flow
Authors: Blandford, G.E,
Current version;
Release date: 8/84
First released; 1984	IGWMC Check-date: 06/92
Institution of Model Development: Water Resources Research Inst., Univ.
of Kentucky
Lexington, KY 40506
Code Custodian: Blandford, G.E.
Univ. of Kentucky, Water Resources Res. Inst.
Lexington, KY 40506
Model Developed for: general use
Documentation:
Model Testing:
Peer Review:
Availability:
Computer requirements: compiler
Abstract:
This is a two-dimensional transient model for flow through
saturated/unsaturated porous media.
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IGWMC Key; 4180 Model name: ID Unsaturated Flow
Model category: unsaturated flow
Authors: Jensen, K.H.
Current version:
Release date: 1983
First released: 1983	IGWMC Check-date: 06/92
Institution of Model Development: Techn. Univ. of Denmark, Inst, of
Hydrodynamics and Hydraulic Eng.,
Groundwater Res. Centre,
Lyngby, Denmark ,
Code Custodian: Jensen, K.H.
Techn. Univ. of Denmark, Inst, of Hydrodynamics and
Hydraulic Eng., Building 115, DK-2800, Lyngby, Denmark
Model Developed for: general use
Documentation:
Model Testing:
Peer Review:
Availability:
Computer requirements: compiler
Abstract:
This xs a one -dxmensxonal flow model for the unsaturated zone. The model
considers moisture extraction by root systems, and allows evaporation for
soil surface.
IGWMC Key: 4270 Model name: TRACR3D
Model category: unsaturated flow and vapor flow, solute transport, porous
medium, fractures
Authors: Travis,	B.J.
Current version:
Release date:	1992
First released:	1984	IGWMC Check-date: 12/92
Institution of Model Development: Los Alamos Nat. Lab., Earth and Space
Sc. Div., Los Alamos, NM 87545
Code Custodian: Travis, B.J.
Los Alamos Nat. Laboratory
MS -F665, P.O. Box 1663, Los Alamos, NM 87545
Model Developed for:
Documen ta t i on:
Model Testing:
Peer Review:
Availability: public domain,
Computer Requirements: compiler
research, general use
theory, user's guide, examples, program structure,
code listing, verification
verification, lab. datasets, code intercomparison
concepts, theory
source code
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Abstract:
TRACR3D is a three-dimensional implicit (for flow)/semi - implicit (for
transport) finite difference model for simulation of transient two-phase
flow of water and air and of non-conservative multi-component transport in
deformable, heterogeneous, water-saturated or variably-saturated, reactive
porous and/or fractured media. Flow of liquid and gas is coupled using
Brooks and Corey expressions for relative hydraulic conductivity of liquid
and gas. Transport processes include advection, dispersion, sorption, and
decay. The model can handle simple steady-state one-dimensional, single
phase problems to complex, transient, two-phase flow and tracer transport.
The code has been applied to study the hydrology and transport of
colloids with radioactive materials at a low-level radioactive waste
disposal site.
Remarks:
The codes UNSAT2, BIM2D/3D, TRUST, FEMWATER, TOUGH, SUTRA, SATURN,
TRACR3D, and FLAMINGO are described and compared in.* Yeh, T.C., T.C.
Rasmussen and D.D. Evans. 1988. Simulation of Liquid and Vapor Movement
in Unsaturated Fractured Rock at the Apache Leap Tuff Site: Models and
Strategies. NUREG/CR-5097, U.S. Nuclear Regulatory Commission,
Washington, D.C. This report includes a detailed description of the code
characteristics and evaluates their applicability based on governing
equations and code options.
IGWMC Key; 4290 Model name: CADIL/AGTEHM
Model category: unsaturated flow, solute transport
Authors: Emerson, C.J., B. Thomas, R.J. Luxmoore, and D.M. Hetrick
Current version:
1984
1982	IGWMC Check-date: 10/90
Release date
First released
Institution of Model Development: Oak Ridge Nat. Lab., Envirorra. Sciences
Div., Oak Ridge, Tennessee 37831
Code Custodian: Emerson, C.J.
Oak Ridge Nat» Laboratories, Computer Sc. Dept.
Oak Ridge, TN 37831
Model Developed for: research, general use
Documentation: theory, user's guide, examples, program structure,
code listing, verification
Model Testing: verification
Peer Review: concepts, theory
Availability: public domain, source code
Computer Requirements: compiler
Abstract:
CADIL (Chemical Adsorption and Degradation In Land) is a moisture and
chemical species mass balance model which simulates chemical transport
through soils. It includes the processes of deposition, infiltration,
adsorption (Freundlich isotherm) and first-order (bio-)chemical
degradation of chemicals. It also simulates the effect of soil
temperature on chemical degradation. Chemical transport in soil water may
be either vertical or lateral. Both macropore and matrix flows of
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chemicals in soil water are modeled. CADIL couples to AGTEHM, which in
turn calculates soil water transport through the bulk matrix and soil
macro-pores. AGTEHM simulates interception, throughfall, infiltration,
soil evaporation, plant transpiration, and surface runoff.
Remarks:
The CADIL model is executed as a submodel of the AGTEHM model (Hetrick et
al. 1982; see references,- see also IGWMC Key # 3390). It was developed
from SCEHM, an earlier soil chemical model developed by Begovich and
Jackson (1975; see references.)
IGWMC Key: 4320 Model name: SOTRAN
Model category: saturated flow, solute transport
Authors: Nwaogazie, I.L.
Current version:
Release date: 1986
First released: 1983	IGWMC Check-date: 09/90
Institution of Model Development: Oklahoma State Univ., Dept. of Civil
Eng., Stillwater, OK 74078
Code Custodian: Nwaogazie, I.L.
Univ. of Port Harcourt, Dept. of Civil Eng.
PMB 5323 Port Harcourt, Nigeria
Model Developed for: research, general use
Documentation: theory, user's guide, examples, code listing
Model Testing:
Peer Review: concepts, theory
Availability: public domain, source code
Computer Requirements: compiler
Abstract:
SOTRAN is a twodimensional finite element model for transient simulation
of noncoupled saturated groundwater flow and advective-dispersive solute
transport in an unconfined or confined aquifer system. Transport
processes include linear equilibrium sorption, and first-order
(bio)chemical and/or radioactive decay. The model supports sources and
sinks, and handles prescribed head, water flux, concentration, and solute
flux boundary conditions. The model uses linear and quadratic
isoparametric quadrilateral elements. The resulting algebraic equations
are solved using Gaussian elimination.
Remarks:
The code is available from the computer program library of the Department
of Civil Engineering, University of Newcastle upon Tyne, Claremont Road,
Newcastle upon Tyne, NE1 7RU, United Kingdom.
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IGWMC Key: 4340 Model name: UNSAT-H
Model category: unsaturated flow
Authors: Fayer, M.J., G.W. Gee, and T.L. Jones
Current version:
Release date: 1985
First released: 1985	IGWMC Check-date: 10/92
Institution of Model Development: Battelle Pacific Northwest
Laboratories, Environm. Sciences Div.
P.O. Box 999, Richland, WA 99352
Code Custodian: Fayer, M.J.
Battelle Pacific NW Laboratories
P.O. Box 999, Richland, WA 99352
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
research, general use
theory, user's guide, examples, program structure,
code listing, verification
verification
concepts, theory, documentation
public domain, source code
compiler
Abstract:
UNSAT-H is a fully-implicit, one-dimensional finite difference model for
simulation of vertical or horizontal unsaturated soil moisture flow. The
model, based on the suction head form of the governing PDE, simulates
infiltration, drainage, redistribution, surface evaporation and plant
water uptake from soil. The soil profile can be homogeneous or layered.
The boundary conditions are controlled to reflect actual surface and
water-table conditions at a given site. The model's numerical technique
is specially designed for arid zones characterized by very dry soils.
Isothermal vapor flow has been included. The lower b.c. can be specified
in the form of a gradient, static water table level, specified bottom
flux, or an impermeable boundary. The upper b.c. is either a constant
(suction) head or a flux boundary.
Remarks:
Soil properties in DNSAT-H can be described as a polynomial, various
Haverkamp moisture characteristics and conductivity functions, or Campbell
function. Conductivity at the midpoint between nodes is calculated with
various arithmetic means or with the geometric mean. Code and
instructions are listed in Fayer and Gee (1985; see references).
UNSAT-H is based on a computer code that was developed by Gupta et al
{1978; see references) to model soil water movement with concurrent crop
water extraction. A version of the Gupta et al. (1978) code, UNSAT1D
(IGWMC Key # 2071), was documented by Bond et al. (1984; see references).
IGWMC Key: 4350 Model name: FEMTRAN
Model category: saturated flow, unsaturated flow, solute transport
Authors: Martinez, M.J.
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Current version;
Release date: 1984
First released: 1984	IGWMC Check-date: 10/92
Institution of Model Development: Sandia Nat. Lab., Fluid Mech. & Heat
Transfer Div., Albuquerque, New Mexico
Code Custodian: Martinez, M.J.
Sandia Nat. Laboratories, Fluid Mech. and Heat Transfer
Div., Albuquerque, NM 87185
Model Developed for: research, general use
Documentation: theory, user's guide, examples, program structure,
verification
Model Testing:	verification, code intercomparison
Peer Review:	concepts, theory
Availability:	public domain, source code
Computer Requirements:	compiler
Abstract:
FEMTRAN is a two-dimensional weighted residuals finite element model to
simulate cross-sectional transport of up-to-ten-members radionuclide
decay chains in saturated/unsaturated porous media. Transport mechanisms
for each nuclide include advecticn, hydrodynamic dispersion, diffusion,
equilibrium adsorption, and radioactive decay and evolution. The
resulting ordenary differential equations are integrated in time by
standard finite difference recurrence relations. Matrix equations are
solved by Gaussian elimination. The model is based on the code FEMWASTE
by Yeh and Ward. It requires user prescribed heads that may be calculated
using FEMWATER, MARIAH, or SAGUARO.
Remarks:
A linear timeplane interpolation procedure is included in FEMTRAN so that
the transport calculation need not proceed at the same time-stepping
sequence used in computing the hydrodynamic solution. The mesh-generator
program QMESH or the mesh and (hydrodynamic) solution transfer program
DECODE may be used to prepare data input.
IGWMC Key: 4360 Model name: IONMIG
Model category: solute transport
Authors: Russo, A.J.
Current version:
Release date: 1984
First released: 1983	IGWMC Check-date: 10/90
Institution of Model Development: Sandia Nat. Lab., Fluid Mech. & Heat
Transfer Div., Albuquerque, New Mexico
Code Custodian: Russo, A.J.
Sandia Nat. Laboratories, Fluid Mech. and Heat Transfer
Div., Albuquerque, NM 87185
Model Developed for: research, general use
Documentation: theory, user's guide, examples, code listing,
verification
Model Testing: verification
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Peer Review: concepts, theory-
Availability: public domain, source code
Computer Requirements: compiler
Abstract:
IONMIG is a finite difference model to calculate two-dimensional far-field
convective-diffusive transport of decaying radionuclides through a
saturated porous medium. Nuclide adsorption coefficient is a function of
concentration and temperature. Planar or axisymmetric two-dimensional
geometries can be treated with either explicit or implicit solvers. The
model requires for input temperature and velocity distributions as
generated by the related code MARIAH.
Remarks:
IONMIG was developed to operate in conjunction with the porous flow
convection heat transfers code MARIAH {see IGWMC Key 2620), which
calculates temperatures and velocities; MARIAH was also developed at
Sandia National Laboratories.
IGWMC Key: 4380 Model name: INFGR
Model category: unsaturated flow
Authors: Craig, P.M., and E.G. Davis
Current version:
Release date: 1985
First released: 1985	IGWMC Check-date: 10/90
Institution of Model Development: Univ. of Tennessee
Knoxville, TN 37916
Code Custodian: Davis, E.C.
Oak Ridge Nat. Laboratories, Env. Sc. Div.
Oak Ridge, TN 37831
Model Developed for: research, general use
Documentation: user's guide, code listing
Model Testing:
Peer Review:
Availability: public domain, source code
Computer Requirements: compiler
Abstract:
INFGR is one-dimensional model to estimate the infiltration rate using the
Green and Ampt equation. The compression method is used to estimate
infiltration during low rainfall periods. The model works well for
determining infiltration but performs poorly in determining soil moisture
content.
Remarks:
The INFGR has been used in conjunction with FEWA {Oak Ridge National Lab.;
see IGWMC Key # 3373} to estimate groundwater recharge in a pollution
problem (Graig and Davis, 1985; see references).
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IGWMC Key; 4410 Model name: HSSWDS
Model category: unsaturated flow
Authors: Perrier, E.R., and A.C. Gibson
Current version:
Release date: 1982
First released: 1982,	IGWMC Check-date: 11/92
Institution of Model Development: U.S. Army Corps of Eng., Waterways
Experim. Station, Water Resources Eng.
Group, Vicksburg, Mississippi 39185
Code Custodian: Landreth, R.E.
U.S. EPA/ORD, Municipal Environmental Res. Lab.
Cincinnati, OH 45268
Model Developed for: general use
Documentation: theory, user's guide, examples, code listing
Model Testing:
Peer Review:
Availability:	public domain, source code
Computer requirements:	compiler
Abstract:
HSSWDS is a one-dimensional, deterministic, water budget model to estimate
the amount of moisture percolation through different types of landfill.
The model was adapted from the CREAMS model and uses the SCS curve method
for calculating runoff. The model takes rainfall, snowmelt, average
temperatures, solar radiation, and leaf area indices, and derives a daily
water budget including surface the runoff, percolation to groundwater, and
evapotranspiration. The model uses a soil storage routing technique in up
to seven layers to derive the flow through the design landfill cover.
IGWMC Keys 4480 Model name: GWMAN
Model category: saturated flow, management/optimization
Authors: Wanakule, N., N.W. Mays, and L.S. Lasdon
Current version:
Release date: 1984
First released: 1984	IGWMC Check-date: 06/92
Institution of Model Development: Univ. of Texas, Dept. of Civil Eng.
Austin, Texas 78712
Code Custodian: Mays, L.W.
Univ. of Texas, Center for Research in Water Resources
10100 Burnet Road, Austin, TX 78712
Model Developed for:
Documentation:
research, general use
theory, user's guide, examples, program structure,
verification
Model Testing: verification
Peer Review: concepts, theory
Availability: restricted non-proprietary, source code
Computer Requirements: compiler
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Abstract:
GWMAN is a computer program for determining optimal pumping and recharge
of large scale artesian and/or non-artesian aquifers by coupling
non-linear optimization with an existing finite difference simulator for
transient horizontal flow in anisotropic, heterogeneous, aquifers. The
state variables which represent the heads, and the control variables which
represent pumpages, are implicitly related through the groundwater
simulator. The simulator equations are used to express the system states
in terms of the controls, yielding so-called reduced problem functions.
The reduced problem xs solved by combxnxng augmented Liagrangxan and
reduced gradient procedures. Both steady-state and transient type
dewatering problems are solved (see also remarks).
Remarks:
The optirnization-groundwater simulation model GWMAN contains the code
GRG2, a generalized reduced gradient optimization routine, and GWSIM, a
finite difference flow simulator developed by the Texas Water Development
Board. GRG2 is a proprietary software, for which a license can be
obtained from the University of Texas.
GWMAN optimizes a function of heads and pumpage, subject to the general
groundwater flow constraint, bound on heads and recharge/pumpage, and
demand constraints.
IGWMC Key: 4490 Model name: SUGARWAT
Model category: unsaturated flow and vapor flow
Authors: Holditch, S.A.
Current version:
Release date: 1983
First released: 1983	IGWMC Check-date: 10/92
Institution of Model Development: Holditch, S.A. and Associates
Bryan, TX 77801
Code Custodian:
U.S. Dept. of Energy, Off. of Fossil Energy
Morgantown Energy Technology Center, P.O. Box 880,
Morgantown, WV 26505
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer requirements;
general use
theory, user's guide, examples,
code listing, verification
verification
concepts, theory
public domain, source code
compiler
program structure.
Abstract:
SUGARWAT is a two-dimensional, two-phase model to simulate the transient
flow of both gas and water xn dual porosxty and sxngle-porosxty
reservoirs. It is a fully-implicit, finite difference model which
utilizes a direct solution technique. Several different reservoir grid
systems are available, including a radial cross-sectional, a rectangular
cross - sectional, and a rectangular areal (plan view) geometry. The ability
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to handle gas desorption from the pore walls of the matrix is included.
Rate options available for individual wells include constant pressure
production, constant gas production, constant water injection, and
constant rate gas injection.
IGVfMC Key: 4500 Model name: FEM301
Model category: saturated flow
Authors: Kiraly,	L.
Current version:
Release date:	1985
First released:	1985	IGWMC Check-date: 12/87
Institution of Model Development: Univ. of Neuchatel
Neuchatel, Switzerland
Code Custodian: Hufschmied, P.
Nat. Coop, for Storage of Radioactive Waste {NAGRA)
Parkstrasse 23, CH-5401 Baden, Switzerland.
Model Developed for: research, general use
Documentation: theory, user's guide, examples, verification
Model Testing: verification, field datasets, code intercomparison
Peer Review: concepts, theory
Availability: proprietary, purchase,* source code
Computer requirements: compiler
Abstract:
FEM301 is a three-dimensional finite element model for simulation of
steady state flow in an equivalent anisotropic porous medium intersected
by linear or planar discontinuities. These discontinuities may be thin
aquifers between aquitards or permeable shear zones. Such features are
modeled with one- or two-dimensional elements embedded in the
three-dimensional network. Post-processing routines include calculation
and graphic display of pathlir.es and traveltimes within the
three-dimensional network.
IGWMC Key: 4510 Model name: FREESURF
Model category: saturated flow
Authors: Hufschmied, P.
Current version:
Release date:
First released: 1985	IGWMC Check-date: 06/92
Institution of Model Development: University of Neuchatel
Neuchatel, Switzerland
Code Custodian: Hufschmied, P.
Nat. Coop, for Storage of Radioactive Waste (NAGRA)
Parkstrasse 23, CH-5401 Baden, Switzerland.
Model Developed for: research, general use
Documentation: theory, verification
Model Testing: verification
Peer Review:
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Availability:
Computer requirements: compiler
Abstract:
FREESURF is a two-dimensional finite element model for simulation of
steady-state phreatic flow in an equivalent anisotropic porous medium.
The model handles free surface and seepage surface conditions and allows
for pumpage and recharge. It solves both the direct and inverse flow
problem in a two-dimensional horizontal or cross-sectional plane.
IGWMC Key: 4530 Model name: MAQWF
Model category; saturated flow
Authors: Contractor, D.N., S.M.A. El Didy and A.S. Ansary
Current version;
Release date: 6/86
First released: 1986	IGWMC Check-date: 09/90
Institution of Model Development:
Code Custodian: Contractor, D.N.
Univ. of Arizona,
Tuscon, AZ 85721
Univ. of Arizona, Dept. of Civil Eng.
and Mech. Eng., Tuscon, AZ 85721
Dept. of Civil and Mech. Eng.
Model Developed for
Documentation
Model Testing:
Peer Review:
Availability: public domain,
Computer requirements: compiler
research, general use
theory, user's guide, code listing
source code
Abstract:
MAQWF is a finite element model for simulation of transient
two-dimensional horizontal flow in a multiple aquifer system with
time-varying boundary conditions. The program handles both confined and
unconfined aquifer conditions and allows local confined/unconfined
conversion during the simulation. The model provides velocities to be
used as input for a transport model.
IGWMC Key: 4531 Model name: MAQWQ
Model category: solute transport
Authors: Contractor, D.N.,	S.M.A. El Didy and A.S. Ansary
Current version:
Release date: 6/86
First released: 1986	IGWMC Check-date: 09/90
Institution of Model Development: Univ. of Arizona, Dept. of Civil Eng.
and Mech. Eng., Tuscon, AZ 85721
Code Custodian: Contractor, D.N.
Univ. of Arizona, Dept. of Civil and Mech, Eng.
Tuscon, AZ 85721
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Model Developed for: research, general use
Documentation: theory, user's guide, code listing, verification
Model Testing: verification
Peer Review:
Availability: public domain, source code
Computer Requirements: compiler
Abstract:
MAGWQ is a finite element model for simulation of transient
two-dimensional nonconservative transport of contaminants in a multiple
aquifer system using velocities generated by the code MAQWF. It has been
designed to analyze the pollution distribution around cavities at coal
gasification sites.
Remarks:
MAGWQ uses velocities generated by the code MAGWF from the same authors
(see IGWMC key # 4530)
IGWMC Key: 4540 Model name: DOSTOMAN
Model category: multimedia exposure model
Authors: King, C.M., E.L. Wilhite, R.W. Root, Jr., D.J. Fauth, et Al.
Current version:
Release date: 10/85
First released: 1985	IGWMC Check-date: 12/90
Institution of Model Development: Savannah River Lab.
Aiken, South Carolina
Code Custodian: King, C.M.
Savannah River Lab.
Aiken, SC 29808
Model Developed for: research, general use
Documentation:	theory, user's guide, examples, program structure,
verification
Model Testing:	verification, field datasets
Peer Review;	concepts, theory, coding, documentation
Availability:	public domain, source code
Computer requirements:	compiler
Abstract:
DOSTOMAN (Dose-To-Man) is a finite difference compartment model for
estimation of long-term dose to humans from buried radioactive waste. It
includes simulation of various pathways such as vegetation, herbivores,
atmosphere, ground-water, and surface water. Compartment modeling is a
semi-analytical technique in which complex environmental transport
pathways are approximated as a series of discrete, interconnected,
homogeneous compartments. Such a compartment is analogous to the
continuous flow, stirred-tank reactor used in chemical engineering.
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IGWMC Key: 4550 Model name: MOTIF (Model of Transport in
Fractured/Porous Media)
Model category: saturated flow, unsaturated flow, solute transport, heat
transport, deformation, porous medium, fractures
Authors: Guvanasen, V,
Current version:
Release date: 4/86
First released: 1984	IGWMC Check-date: 04/91
Institution of Model Development: Atomic Energy of Canada, Ltd.,
Whiteshell Nuclear Res. Sstabl.
Pinawa, Manitoba, Canada
Code Custodian: Chan T.
Atomic Energy of Canada, Ltd.
Whiteshell Nuclear Research Estb., Pinawa, Manitoba,
Canada R03 110
Model Developed for:
Documentation:
research, general use
theory, user's guide, verification
Model Testing: verification, code intercoraparison
Peer Review:
Availability: proprietary, license; source code
Computer Requirements: compiler
Abstract:
MOTIF xs a fxnxte element model to sxmulate one*, two-, and
three-dimensional coupled processes of saturated or unsaturated fluid
flow, conductive and convective heat transport, brine transport and single
species radionuclide transport in a compressible rock of low permeability
intersected with a few major fractures. The model includes diffusion into
the rock matrix.
Remarks:
MOTIF is especially suitable for modeling fractured rock mass since the
4-noded planar elements can be used to simulate flow in arbitrarily
oriented planar fractures or fracture zones in a 3D model. The model has
been verified among others by comparison with closed-form solutions in the
HYDROCOIN project. (see Chanet Al. 1986). It has been subject to AECL's
internal quality assurance.
IGWMC Key: 4570 Model name: VS2D/VS2DT
Model category: unsaturated flow, solute transport
Authors: Lappala, E.G., R.W. Healy, and E.P. Weeks
Current version: 2.0
Release date; 2/93
First released: 1987	IGWMC Check-date: 06/93
Institution of Model Development: U.S. Geological Survey, Water Resources
Div., Federal Center, Denver, CO 80225
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Code Custodian: Weeks, E.P.
U.S. Geological Survey, Water Resources Div.
413 Federal Center, Lakewood, CO 80225
Model Developed for: research, general use
Documentation: theory, user's guide, examples, program structure,
code listing, verification
Model Testing: verification
Peer Review: concepts, theory, documentation
Availability: public domain, source code, compiled (PC) version
Computer Requirements: Intel 803 86 based computer, 4 Mb RAM, 4 Mb disk
space, CGA, math coprocessor, DOS 3.0; compiler for
larger versions and other platforms
Abstract:
VS2D is a two-dimensional finite difference simulator for cross-sectional
or cylindrical variably saturated flow in porous media. The model allows
consideration of non-linear storage, conductance, and sink terms and
boundary conditions. Processes included are infiltration, evaporation and
plant root uptake. The program also handles seepage faces. VS2DT is a
solute transport module to be used with VS2D. It is based on a finite
difference approximation of the advection-dispersion equation for a single
species. Program options include first-order decay, equilibrium
adsorption described by Freundlich or Langmuir isotherms, and
ion-exchange. Nonlinear storage terms are linearized by an implicit
Newton-Raphson method (see also remarks).
Remarks:
The computer program VS2D, which simulates water movement through variably
saturated porous media, was published in 1987 (Lappala et A1. 1987; see
references). The computer program VS2DT, which includes both non-linear
water flow and solute transport, was released in 1990. It included a
slightly modified version of VS2D (Healy 1990; see references).
Initial conditions may be input as moisture content or pressure head by
blocks defined by row and column, or in formatted file by cell. An
equilibrium profile may.be specified above a user defined free water
surface.
Nonlinear boundary conditions treated by the code include infiltration,
evaporation, and seepage faces. Extraction by plant roots is included as
a nonlinear sink term.
Infiltration may be simulated by specified flux nodes, specified pressure
nodes, or a ponding function where the user specifies a rainfall rate and
a ponding height. Evaporation is simulated by a user defined potential
evaporation, pressure potential of the atmosphere, and surface resistance.
Evapotranspiration is simulated through the use of user defined potential
evapotranspiration, minimum root pressure, depth of rooting, and root
activity at the bottom of the root zone and land surface. Seepage faces
may also be simulated.
Nonlinear•conductance terms, boundary conditions, and sink terms are
linearized implicitly. Relative hydraulic conductivity is evaluated at
cell boundaries by using full upstream weighting, the arithmetic mean, or
the geometric mean of values of adjacent cells. Saturated hydraulic
conductivities are evaluated at cell boundaries by using distance-weighted
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harmonic means. The linearized matrix equations are solved using the
strongly implicit method. Nonlinear conductance and storage coefficients
are represented by closed-form algebraic equations or interpolated from
tables.
IGWMC distributes a version which includes an IGWMC-prepared user
interface for data entry and program execution.
IGWMC Key; 4590 Model name: MAGNUM-2D
Model category: saturated flow, heat transport, porous medium, fractures
Authors: England, R.L., N.W. Kline, K.J. Ekblad, and R.G. Baca
Current version: 3.1
Release date: 1/85
First released: 1985	IGWMC Check-date: 11/92
Institution of Model Development; Rockwell Hanford Operations
P.O. Box 800, Richland, WA 99352
Code Custodian: Rockwell Hanford Operations, Energy Systems Group
P.O. Box 250, Richland, WA 99352
Model Developed for: research, general use
Documentation: theory, user's guide, examples, program structure,
code listing, verification
Model Testing:	verification
Peer Review:	concepts, theory, documentation
Availability:	public domain, source code
Computer requirements:	compiler
Abstract:
MAGNUM-2D is a two-dimensional, cross-sectional or three-dimensional
axi -symmetric finite element model for transient or steady-state analysis
of coupled heat transfer and groundwater flow m an inhomogeneous,
anisotropic, fractured porous medium. Transport processes include
advection, dispersion, diffusion, sorption and decay for multiple species.
A set of support programs are available to generate, manipulate, and
display the finite element grid? to compute and plot pathlines and
traveltimes,- and to plot contours, spatial cross-sections, and time
histories for temperature and hydraulic head. The program can be linked
with a radionuclide-chain transport code CHAINT (IGWMC Key 3791) .
IGWMC Key: 4591 Model name*. MAGNUM-3D
Model category: saturated flow
Authors: Estey, S.A., R.C. Arnett, and D.R. Aichele
Current version: 3.0
Release date: 3/85
First released:	IGWMC Check-date: 10/90
Institution of Model Development: Rockwell Hanford Operations
P.O. Box BOO, Richland, WA 99352
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Code Custodian: Estay, S, or D. Aichele
Boeing Computer Services Richland, Inc.
P.O. Box 300, Richland, WA 99352
Model Developed for: research, general use
Documentation: theory, user's guide, examples, program structure,
verification
Model Testing: verification
Peer Review: concepts, theory, documentation
Availability: public domain, source code
Computer Requirements: compiler
Abstract:
MAGNUM-3D is a three-dimensional finite element code for simulation of
steady-state and transient groundwater flow. The model can handle complex
anisotropic, heterogeneous hydrologic systems. Quadratic elements allow
the user to model irregular boundaries and hydrogeologic structures in
detail. Layer pinch-outs can be modeled using three-dimensional prism
elements. Stress may be applied in the form of surface recharge due to
precipitation or irrigation well discharge.
Remarks:
A set of support codes and graphic software are used to plot the results
of MAGNUM3D (head distribution). A separate code, PATH - 3D, uses the
output of MAGNUM3D to compute groundwater flow paths and travel times.
Another code, FECTRA-3D, uses the head field generated by MAGNUM3D to
simulate radionuclide migration in a fractured porous medium.
IGWMC Key: 4600 Model name: SANGRE
Model category: saturated flow, heat transport, deformation
Authors: Anderson, C.A.
Current version:
Release date: 10/86
First released: 1986
IGWMC Check-date: 04/94
Institution of Model Development: Los Alamos Nat. Lab., Earth and Space
Sc. Div., Los Alamos, NM 87545
Code Custodian: Anderson, C.A.
Los Alamos Nat. Laboratory
P.O. Box 1663, Los Alamos, NM 87545
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability;
Computer Requirements:
Abstract:
research, general use
theory, user's guide, examples
restricted non-proprietary, source code
compiler
SANGRE is a finite element code for thermomechanical analysis of
two-dimensional problems in structural geology. It allows simulation of
convective heat transport, consolidation,' and fluid migration. It
includes modeling capabilities for highly deformable and deformed geologic
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media, large deformations, faults, overthrusts, etc. The model has a
flexible, grid which can rotate and translate in time, following the
displacements of the rock matrix.
Remarks:
SANGRE is based on an earlier version called SANGRE-P which did not have
the complicating features of fluid motion and of sliding interfaces (see
Anderson and Bridwell 19805.
IGWMC Key; 4610 Model name: HST3D
Model category: saturated flow, solute transport, heat transport
Authors; Kipp, Jr., K.L.
Current version: 1.5
Release date: 7/91
First released: 1986	IGWMC Check-date: 07/94
Institution of Model Development: U.S. Geological Survey, Water Resources
Div,, Federal Center, Denver, CO 80225
Code Custodian: Kipp Jr., K.L.
U.S. Geological Survey, Water Resources Div.
Box 25046, 411 Federal Center, Lakewood, CO 80225
research, general use, education
theory, user's guide, examples, program structure,
verification
Model Testing: verification, field datasets
concepts, theory, documentation
public domain, source code, compiled (PC) version
Intel 80386 based computer, DOS 3.3, 4 Mb RAM, CGA,
math coprocessor; compiler for larger versions or
other platforms
Model Developed for:
Documentation:
Peer Review:
Availability:
Computer Requirements:
Abstract:
The Heat- and Solute-Transport Program HST3D simulates ground-water flow
and associated heat and solute transport in three dimensions. The three
governing equations are coupled through the interstitial pore velocity,
the dependence of the fluid density on pressure, temperature, and solute
mass fraction. The solute-transport equation is for only a single, solute
species with possible linear-equilibrium sorption and linear decay,
finite-difference techniques are used to discretize the governing
equations using a point-distributed grid. The flow-, heat-, and
solute-transport equations are solved, in turn, after a partial
Gauss - reduction scheme is used to modify them. The basic source-sink term
represents wells. A complex well - flow model may be used to simulate
specified flow rate and pressure conditions at the land surface or within
the aquifer, with or without pressure and flow-rate constraints. Boundary
condition types include specified value, specified flux, leakage, heat
conduction, an approximate free surface, and two types of
aquifer - influence functions. All boundary conditions can be functions of
time. Two techniques are available for solutions of the finite-difference
matrix equations. One technique is a direct (Gaussian) elimination
solver, using equations reordered by alternating diagonal planes. The
other technique is an iterative solver, using two-line successive
overrelaxation. A restart option is available for storing intermediate
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results and restarting the simulation at an intermediate time with modified
boundary conditions.
Remarks:
Two techniques are available for solution of the finite-difference matrix
equations in HST3D. One technique is a direct-elimination solver, using
equations reordered by alternating diagonal planes. The other is an
iterative solver, using two-line successive overrelaxation. A re-start
option is available for storing intermediate results and restarting the
simulation at an intermediate time with modified boundary conditions.
Data input and output in HST3D may be in metric (SI) units or inch-pound
units. Output may include tables of dependent variables and parameters,
zoned-contour maps, and plots of the dependent variables versus time.
HST3D is a descendent of the Survey Waste Injection Program (SWIP; see
IGWMC Key # 692) of the U.S. Geological Survey.
IGWMC Key: 4620 Model name: MASCOT
Model category: solute transport
Authors: Gureghian, A.B.
Current version:
Release date: 8/86
First released: 1986	IGWMC Check-date: 09/90
Institution of Model Development: Battelle Office of Crystalline
Repository Development
505 King Ave., Columbus, OH 43201
Code Custodian: Code Custodian
Battelle Memorial Inst., Off. of Waste Technology
Developm., 7000 South Adams Street, Willowbrook, IL 60521
Model Developed for: research, general use
Documentation: theory, user's guide, examples, program structure,
code listing, verification
Model Testing: verification
Peer Review:	concepts, theory, documentation
Availability:	public domain, source code
Computer Requirements:	compiler, DISSPLA graphics library
Abstract:
MASCOT is a program providing analytical solutions for multi-dimensional
transport of a four-member radionuclide decay chain in an isotropic,
homogeneous, confined ground-water system. It computes the two- and
three-dimensional space-time dependent convective-dispersive transport
assuming steady-state, uniform ground-water flow. The model can handle a
single or multiple finite line source or a Gaussian distributed source in
the 2D case, and a single or multiple patch source or bivariate-normal
distributed source in the 3D case. The differential equations are solved
by Laplace and Fourier transforms and a Gauss-Legendre integration scheme.
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IGWMC Key: 4630 Model name: FLAMINGO
Model category: saturated flow, unsaturated flow, solute transport
Authors; Huyakorn, P.S
Current version
Release date
First released
1/85
1985	IGWMC Check-date: 12/92
Institution of Model Development: GeoTrans, Inc,
46050 Manekin Plaza, Suite 100,
Sterling, VA 22170
Code Custodian: Ward, D.S.
GeoTrans, Inc.
46050 Manekin Plaza, Suite 100, Sterling, VA 22170
Model Developed for: general use
Documentation: theory, user's guide, examples, program structure,
verification
Model Testing: verification, lab. datasets
Peer Review: concepts, theory
Availability: proprietary, license, source code
Computer Requirements: compiler
Abstract:
FLAMINGO (FLow And Migration of Nonconservative Contaminants) is a
three-dimensional upstream weighted finite element model to simulate
transient water flow and solute transport processes in fully- and variably
saturated porous media. The flow part is based on the 3D form of the
Richard's equation and includes infiltration and plant root extraction.
It handles complex flow boundary conditions including seepage faces and
evaporation. Transport processes included are advection, hydrodynamic
dispersion, linear equilibrium adsorption and first-order decay.
Nonlinearities due to unsaturated soil properties and atmospheric boundary
conditions are treated using Picard and Newton-Raphson iterative schemes.
The model uses a Slice Successive Over Relaxation (SSOR) matrix solution
scheme. Two-dimensional areal or cross-sectional simulation is supported.
The code computes complete mass balances for flow and transport.
Remarks:
The codes UKSAT2, BIM2D/3D, TRUST, FEMWATER, TOUGH, SUTRA, SATURN,
TRACR3D, and FLAMINCO are described and compared in: Yeh, T.C., T.C.
Rasmussen and D.D. Evans. 1988. Simulation of Liquid and Vapor Movement
in Unsaturated Fractured Rock at the Apache Leap Tuff Site: Models and
Strategies. NUREG/CR-5097, U.S. Nuclear Regulatory Commission,
Washington, D.C. This report includes a detailed description of the code
characteristics and evaluates their applicability based on governing
equations and code options.
IGWMC Key: 4631 Model name: SWICHA
Model category: saturated flow, fresh/salt water flow, solute transport
Authors: Huyakorn, P.S., P.F. Andersen, J.W. Mercer, and H.0. White Jr.
Current version: 5.05
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Release date: 2/91
First released: 1986
IGWMC Check-date: 07/94
Institution of Model Development: GeoTrans, Inc,
46050 Manekin Plaza, Suite 100,
Sterling, VA 22170
Code Custodian: GeoTrans, Inc.
46050 Manekin Plaza, Suite 100, Sterling, VA 22170
Model Developed for: general use
Documentation: theory, user's guide, examples, verification
Model Testing: verification
Peer Review: concepts, theory
Availability: 1) public domain; 2) proprietary; source code,
compiled (PC) version
Computer Requirements: Intel 80386 based computer, 4 Mb RAM, DOS 2.1, CGA;
compiler for other platforms
Abstract:
SWICHA is a three-dimensional finite element model for analyzing seawater
intrusion in heterogeneous, anisotropic coastal aquifers. The model is
designed to simulate coupled variable density fluid flow and solute
transport in fully-saturated porous media. The model which can also
handle quasi-three-dimensional conditions and axisymmetric geometries,
includes linear equilibrium adsorption and first-order decay. The flow
and transport equations are discretized using the finite element method.
Simple rectangular and triangular prism elements are used. The
combination of such elements enables flow regions of complex geometry to
be modeled accurately. In addition, element matrices can be computed
efficiently without having to perform numerical integration. Matrix
assembly is performed in a vertical slice-by-slice manner and solved with
a slice-successive over-relaxation {SSOR) scheme. This scheme permits a
fairly large number of unknowns to be handled cost effectively. For a
coupled flow and transport problem, the nonlinearity is handled by Picard
iterations. At the user's option, artificial dispersion can be added to
the transport equation stiffness matrix to prevent exceeding a critical
Peclet number. SWICHA is capable of performing several types of analysis,
performed in an areal plane, vertical cross-section, axisymmetric
configuration, or a fully three-dimensional mode. Because of its special
design features, SWICHA is capable of handling a wide range of complex
three-dimensional, steady-state or transient field problems.
Remarks:
The original version of SWICHA was released in 1984. The present version
of SWICHA, version 5.05, is derived from version 4.2 which was released in
April 1987. Version 5.05 was developed for the Southwest Florida Water
Management District. Major changes since previous versions include:
implementation of a full fluid flow and solute transport mass balance
scheme, restructuring of data storage into variably dimensioned labelled
common blocks, logic that checks and adjusts dispersion for Peclet number,
restructuring of input handling, and various corrections.
The SWICHA code may be used in many types of practical situations.
These include: 1) groundwater resource evaluations; 2) assessments of
well performance and pumping test analysis,* 3) groundwater contamination
investigations; 4) hazardous waste subsurface storage programs; 5)
seawater intrusion studies.
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IGWMC Key: 4632 Model name: FRACFLOW
Model category: saturated flow, dual porosity medium, fractures
Authors:
Current version;
Release date: 2/90
First released:	IGWMC Check-date: 09/93
Institution of Model Development: GeoTrans, Inc,
46050 Manekin Plaza, Suite 100,
Sterling, VA 22170
Code Custodian: GeoTrans, Inc.
46050 Manekin Plaza, Suite 100, Sterling, VA 22170
Model Developed for.- general use
Documentation:
Model Testing:
Peer Review:
Availability: proprietary, license; compiled (PC) version
Computer requirements:
Ahatract:
FRACFLOW is a two-dimensional (areal) transient groundwater flow model for
fractured and karst aquifers under confined or phreatic conditions. To
approximate the flow in such systems, a double-porosity conceptual model
is used. Fractures and solution features may be represented as secondary
porosity in high-permeability fractures or as discrete joint line
elements. The model calculates hydraulic head in both fractures and
porous matrix blocks, which are coupled via the fluid transfer
coefficient. The aquifer is represented using 2D quadrilateral finite
elements. The dual porosity system is superimposed by addition of
automated ID finite difference discretization of the matrix blocks. The
two equations are solved sequentially.
IGWMC Key: 4640 Model name: RAQSIM (Regional AQuifer SIMulation)
Model category: saturated flow
Authors: Cady, R.E., and J.M. Peckenpaugh
Current version:
Release date: 1985
First released: 1985	IGWMC Check-date: 09/90
Institution of Model Development: U.S. Geological Survey, Water Resources
Div., Lincoln, Nebraska
Code Custodian: U.S. Geological Survey, Water Resources Div.
406 Federal Building, 100 Centennial Mall North, Lincoln,
NE 68508
Model Developed for: research, general use
Documentation: theory, user's guide, examples, program structure,
code listing, verification
Model Testing: verification
Peer Review: concepts, theory, documentation
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Availability: public domain, source code
Computer Requirements: compiler
Abstract;
RAQSIM is a two-dimensional finite element model for transient regional
aquifer simulation with support programs for evapotranspiration using the
Jensen-Haise method, for infiltration, storage, and removal of water from
the soil zone using climatic data, evapotranspiration data and soil
characteristics, and for computing recharge and discharge from the
groundwater system, including stream-aquifer flux.
Remarks:
RAQSIM is a extensively modified version of the program FLUMP by Neumann
and Karasimhan (see IGWMC Key # 0122},
IGWMC Key: 4650 Model name: SWANFLOW
Model category: multiphase flow
Authors: Faust, C.R., and J.D. Rumbaugh
Current version: 1.0
Release date: 4/91
First released: 1986	IGWMC Check-date.- 06/93
Institution of Model Development: GeoTrans, Inc,
46050 Manekin Plaza, Suite 100,
Sterling, VA 22170
Code Custodian: GeoTrans, Inc.
46050 Manekin Pla2a, Suite 100, Sterling, VA 22170
Model Developed for:
Documentation:
Computer Requirements:
research, general use, education
theory, user1s guide, examples, program structure,
code listing, verification
Model Testing: verification
Peer Review: concepts, theory
Availability: public domain, source code, compiled (PC) version
Intel 80386 based computer, 4 Mb RAM, math
coprocessor, CGA; compiler for larger 3D versions
and other platforms
Abstract:
SWANFLOW (Simultaneous Water, Air and Non-aqueous phase FLOW) is a
multi-dimensional (2D and 3D) finite difference model for simulation of
simultaneous flow of water, air and immiscible non-aqueous phase liquids
(NAPL's) within and below the vadose zone. The conservation equations for
mass and momentum of water, gas (air), and a NAPL are simplified to yield
two strongly coupled nonlinear partial differential equations.
Linearization is performed with Newton-Raphson iteration. Pressure
gradients in the air phase are considered negligible; air pressure is
assumed to be constant and equal to atmospheric pressure. The model
determines the spatial and temporal distribution of NAPL and water
pressures and saturations, water and NAPL mass balances. Acceptable
boundary conditions are: specified flux, fluid potential and fluid
potential - dependent flux. A user-friendly two-dimensional PC version is
also available (see remarks).
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Remarks;
There are three primary limitations to the code: 1) the air phase is
considered to be at constant atmospheric pressure, thus flow of air is not
modeled; 2) mass transfer between phases is not considered, i.e. NAPL
cannot dissolve in water or evaporate; 3) practical application of the
code to field problems can be complicated by lack of site-specific
capillary pressure and relative permeability.
The three-dimensional version of SWANFLOW (version 1.0; February 19895 is
available from the International Ground Water Modeling Center, Colorado
School of Mines, Golden, CO 80401, USA.
A proprietary two-dimensional version SWANFLOW-2D (1992) for IBM PC/AT and
compatible under DOS 2.1 or higher has been developed by GeoTrans, Inc.
and is distributed by them. This proprietary code has an user-friendly
data input program and is well-supported, {see references).
IGWMC Key: 4660 Model name: FLOSA (FLOw Systems Analysis)
Model category: saturated flow
Authors: Z13I, W., and M. Nawalany
Current version:
Release date: 4/88
First released: 1985	IGWMC Check-date: 01/93
Institution of Model Development: TNO Institute for Applied Geoscience
Delft, The Netherlands
Code Custodian: Nawalany, M.
TNO Inst, of Applied Geoscience
P.O. Box 6012, 2600 JA Delft, The Netherlands
Model Developed for; research, general use
Documentation: theory, user's guide, examples, verification
Model Testing: analytical solutions, field testing
Peer Review: concepts, theory
Availability: proprietary, purchase; source code (main frame),
compiled (PC) version
Computer Requirements: IBM PC/AT (2D version only), 640 Kb RAM, CGA; Intel
80386 based computer, 4 Mb RAM, math coprocessor,
VGA (3D version) ,- compiler for other platforms
Abstract:
Originally designed for study of two-dimensional, cross-sectional
problems, current versions of FLOSA simulate three-dimensional
steady-state groundwater flow in anisotropic, heterogeneous porous media,
using flow velocity as the dependent variable in the numerical solution
(TVR--Transport Velocity Representation), Separate programs exist for
finite element generation, pathline generation and plotting, travel times
calculation, and contouring. FLOSA-3D uses a hybrid finite
difference/finite element approximation of the mass flux and pressure.
FLOSA-3FE is based on the Galerkin finite element method. Both models
support 1st and 2nd type boundary conditions and use the Preconditioned
Incomplete Cholesky Decomposition solver.
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Remarks:
The following versions of FLOSA exist: FLOSA-FD: finite difference
simulation of 2D flow, FLOSA-3D: hybrid finite element/finite difference
simulator for 3D flow, and FLOSA-3FE: finite element simulator for 3D flow
IGWMC Key; 4670 Model name: DREAM
Model category: saturated flow
Authors: Bonn, B.A., and S.A. Rounds
Current version:
Release date: 3/90
First released: 1989	IGWMC Check-date: 11/92
Institution of Model Development: Oregon Graduate Center, Dept. of
Environm. Sc. and Eng.
19600 NW Von Neumann Drive, Beaverton,
OR 97006-1999
Code Custodian: B.A. Bonn
c/o Lewis Publishers, Inc., c/o CRC Publishers, Inc.
2000 Corporate Blvd. N.W., Boca Raton, FL 33431
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer rsquireir,sn ts :
research, general use, education
theory, user's guide, examples, verification
verification
concepts, theory, documentation
proprietary, purchase: compiled
IBM PC/AT, DOS 2.1, 256 Kb RAM,
(PC) version
CGA/EGA
Abstract:
DREAM is a menu-driven, user-interactive series of analytical programs for
the calculation of drawdowns, water level elevations, steady-state
velocities and streamlines in homogeneous and isotropic aquifers. It
supports the creation of flow nets, streamline plots and capture zone maps
by contouring DREAM.'s output files (contour program not included).
IGWMC Key: 4680 Model name: MODRET
Model category: saturated flow, unsaturated flow
Authors:
Current version:
Release date: 1990
First released: 1990	IGWMC Check-date: 01/93
Institution of Model Development: unknown
Code Custodian: unknown
Model Developed for: research, general use
Documentation: theory, user's guide
Model Testing:
Peer Review:
Availability: proprietary, purchase,- compiled (PC) version
Computer Requirements: IBM PC/AT, DOS 2.1, 640 Kb RAM, CGA, math coprocessor
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Abstract:
MODRET is an easy-to-use, interactive computer program for analyzing
infiltration from stormwater retention ponds in unconfined aquifers. It
calculates unsaturated infiltration, using a modified version of the Green
and Ampt equation and saturated infiltration using the MODFLOW
three-dimensional modular flow model of the USGS. Both infiltration
during the storm event and retention volume recovery after the storm event
can be calculated. The model assumes a homogeneous and isotropic
unconf ined aquifer system. Both dry pond bottom and wet condi t ions can be
simulated.
IGWMC Key: 4690 Model name: VAM2D (Variably saturated Analysis Model
in 2 Dimensions)
Model category: saturated flow, unsaturated flow, solute transport
Authors: Huyaltorn, P. S.
Current version:
Release date: 1988
First released: 1988	IGWMC Check-date: 10/90
Institution of Model Development: HydroGeologic, Inc.
1165 Herndon Parkway, Suite 900,
Herndon, VA 22070
Code Custodian: Kool, J.
HydroGeologic, Inc.
1165 Herndon Parkway, suite 900, Herndon, VA 22070
Model Developed for: general use
Documentation: theory, user's guide, examples, verification
Model Testing: verification, code intercomparison, laboratory data
sets
Peer Review: concepts, theory, performance
Availability: proprietary, license; source code, compiled (PC)
version
Computer Requirements: Intel 80386 based computer, 4 Mb RAM, CGA; compiler
for larger versions or other platforms
Abstract:
VAM2D is a two-dimensional Galerlcin finite element model to simulate flow
and contaminant transport in heterogeneous, anisotropic, variably
saturated porous media. The code can perform simulations in an areal
plane, a cross-section, or an axisymmetric configuration, and handles a
wide variety of boundary conditions, including seepage faces. The highly
nonlinear soil moisture relations can be treated using Picard or
Newton-Raphson iterations. The model uses the upstream weighted residual
method to treat the advective-dispersive transport equation with linear or
non-linear equilibrium sorption, first-order degradation, and chain-decay.
Cross-sectional unconfined flow problems can be analyzed using a rigorous
unsaturated-saturated modeling approach or an approximate saturated-pseudo
unsaturated modeling approach that does not require user-supplied soil
moisture relations. The model handles hysteresis in unsaturated zone
simulation.
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Remarks:
The model VAM2D is a descendant of the formulation used in the SATURN code
presented by Huyakorn et A1 (1984, 1985; see references). Where possible,
the VAM2D code has been checked by its authors against available
analytical or semi-analytical solutions and similar numerical codes
including UNSAT2, FEMWATER/FEMWASTE, and SATURN.
IGWMC Key: 4691 Model name: VAM3D (Variably saturated Analysis Model
in 3 Dimensions)
Model category: saturated flow, unsaturated flow, solute transport
Authors: Huyakorn, P.S.
Current version:
Release date: 1988
First released: 1988	IGWMC Check-date: 10/90
Institution of Model Development: KydroGeologic, Inc.
1165 Herndon Parkway, Suite 900,
Herndon, VA 22070
Code Custodian: Kool, J.
HydroCeologic, Inc.
1165 Herndon Parkway, suite 900, Herndon, VA 22070
Model Developed for: general use
Documentation: theory, user's guide, examples, verification
Model Testing: verification, code intercomparison
Peer Review: concepts, theory, performance
Availability: proprietary, license; source code, compiled (PC)
version
Computer Requirements: Intel 80386 based computer, 4 Mb RAM, CGA; compiler
for larger versions or other platforms
Abstract:
VAM3D is a three-dimensional finite-element model for simulation of flow
and contaminant transport in heterogeneous, anisotropic, variably
saturated porous media. It is capable of steady-state and transient
simulations in an areal plane, a cross-section, an axisymmetrie
configuration, or a fully three-dimensional model using rectangular and
triangular prisms. It handles a wide variety of boundary conditions,
including seepage faces. Nonlinearities in the unsaturated flow equation
is solved using Picard iteration. The matrix equations are solved using a
slice-successive relaxation scheme or conjugate gradient algorithms. The
advective-dispersive transport equation is solved using upstream weighted
procedure. Transport includes linear and Freundlich adsorption isotherms
and first-order degradation. An element mesh generator is available.
Remarks:
The formulation used in VAM3D is a descendent of the formulation used in
the FLAMINCO code presented by Huyakorn et Al. (1986? see references).
Where possible, VAM3D has been checked by its authors against available
analytical or semi-analytical solutions and similar numerical codes
including UNSAT2, FEMWATER/FEMWASTE, SATURN and FLAMINCO.
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IGWMC Key: 4693 Model name; VADOFT
Model category: unsaturated flow, solute transport
Authors: Huyakorn, P.S.
Current version:
Release date: 1988
First released: 1987
T.D. Wadsworth, H.O. White Jr., and J.E. Buckley
IGWMC Check-date: 10/92
Institution of Model Development: HydroGeologic, Inc.
1165 Herndon Parkway, Suite 900,
Herndon, VA 22070
Code Custodian: Kool, J.
HydroGeologic, Inc.
1165 Herndon Parkway, suite 900, Herndon, VA 22070
Model Developed for: research, general use
Documentation: theory, user's guide, examples, verification
Model Testing: verification, code intercomparison
Peer Revxew: concepts, theory, documentation
Availability: public domain, source code
Computer Requirements: compiler
Abstract:
VADGFT is a one~dimensional finite element code that solves the Richard's
equation for flows in the unsaturated zone. The user may make use a form
of the van Genuchten relationships for relative hydraulic conductivity and
metric potential vs. moisture content, a power relationship for the
relative hydraulic conductivity function, or tabulated values to solve the
flow equations. VADOFT also simulates the fate and transport of two
parent and two daughter products. The transport process includes
hydrodynanic dispersion, advection, linear equilibrium sorption, and first
order decay. The code predicts infiltration and solute mass flux entering
the saturated zone. Time dependent boundary conditions include prescribed
head, volumetric water flux, concentration and solute mass flux.
Remarks:
PRZM, VADOFT and SAFTMOD are part of RUSTIC. RUSTIC (IGWMC Key # 4721}
links these models in order to predict the fate and transport of chemicals
to drinking water wells. The codes are linked together with the aid of a
flexible execution supervisor (software user interface) that allows the
user to build models that fit site-specific situations.
VADOFT was compared to analytical solutions and the codes UNSAT2 and
SATURN (see Dean et al., 1989). The results from VADOFT were found to be
in excellent agreement with analytical results and the other numerical
models.
IGWMC Key: 4694 Model name: SAFTMOD
Model category: saturated flow, solute transport
Authors: Huyakorn, P.S., and J.E. Buckley
Current version:
Release date: 1988
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First released: 1988	IGWMC Check-date: 10/92
Institution of Model Development: HydroGeologic, Inc.
1165 Herndon Parkway, Suite 900,
Herndon, VA 22070
Code Custodian: Kool, J,
HydroGeologic, Inc.
1165 Herndon Parkway, suite 900, Herndon, VA 22070
Model Developed for: research, general use
Documentation; theory, user's guide, examples, verification
Model Testing: verification, code intercomparison
Peer Review: concepts, theory, documentation
Availability: public domain, source code
Computer Requirements: compiler
Abstract:
SAFTMOD is a finite element model for simulating flow and solute transport
in the saturated zone of an unconfined groundwater system. It performs
two-dimensional simulations in either the X-Y or X- Z plane of the porous
medium. It also can perform axisymmetric simulations. Both single
{confined or unconfined) and leaky two-aquifer systems can be handled with
recharge from infiltration or precipitation and well pumping or injection.
Transport includes hydrodynamic dispersion, advection, linear equilibrium
sorption, and first-order decay. Parent/daughter transformations are also
simulated. Boundary conditions include prescribed head, volumetric water
flux, concentration, and solute mass flux.
Remarks:
SAFTMOD has been verified by comparison with analytical solutions for flow
and solute transport and code intercomparison (see Dean et al,, 1989),
PRZM, VADOFT and SAFTMOD are part of RUSTIC. RUSTIC (IGWMC Key # 4721)
links these models in order to predict the fate and transport of chemicals
to drinking water wells. The codes are linked together with the aid of a
flexible execution supervisor (software user interface) that allows the
user to build models that fit site-specific situations.
IGWMC Key: 4700 Model name: DSTRAM (Density-dependent Subsurface
TRansport Analysis Model)
Model category: saturated flow, solute transport, heat transport
Authors: Huyakorn, P.S.
Current version;
Release date: 1988
First released: 1988	IGWMC Check-date: 11/93
Institution of Model Development: HydroGeologic, Inc.
1165 Herndon Parkway, Suite 900,
Herndon, VA 22070
Code Custodian: Kool, J.
HydroGeologic, Inc.
1165 Herndon Parkway, suite 900, Herndon, VA 22070
Model Developed for: general use
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Documentation: theory, user * s guide, examples, verification
Model Testing: verification
Peer Review: concepts, theory
Availability: proprietary, license; source code, compiled (PC)
version
Computer Requirements: Intel 80386 based computer, 4 Mb RAM, CGA; compiler
for larger versions or other platforms
Abstract:
DSTRAM is a three-dimensional upstream-weighted finite-element model that
simulates coupled, density-dependent single-phase fluid flow and solute or
energy transport in heterogeneous, anisotropic, saturated
confined/unconfinea porous media. This model can perform steady-state or
transient simulations in a cross-section, an axisymmetric configuration,
or a fully-3D model. For contaminant transport simulation the model
includes advection, hydrodynamic dispersion, linear equilibrium
adsorption, and first-order degradation; for heat transport simulation, it
includes additional processes of heat conduction and storage in the fluid
and rock matrix. Nonlinearity resulting from density differences is
handled via a Picard algorithm. Matrix equations are solved using a Slice
Successive Relaxation scheme. Simple mesh generation is handled by the
code itself; for more complex grids a separate mesh generator is available.
Remarks:
Boundary conditions in DSTRAM include prescribed nodal values of the
equivalent fresh-water head or prescribed integrated nodal values of fluid
volumetric fluxes. Boundary conditions for solute transport include
prescribed nodal values of solute mass fluxes. Boundary conditions for
heat transport include prescribed temperature and prescribed integrated
nodal values of heat fluxes. Output include nodal values for hydraulic
head, Darcy velocities and flow rates, and nodal concentrations and
fcsrnpsrcLtiiir 6 s •
The model formulation used in DSTRAM is a descendant of the formulation
used in the GREASE2 and SWICHA codes presented by Huyakorn and Gelhar
(1981; see references). Where possible, DSTRAM code has been checked by
its authors against available analytical or semi-analytical solutions and
similar numerical codes including SUTRA, CFEST and SWICHA.
IGWMC Key: 4710 Model name: STAFF2D (Solute Transport And Fracture
Flow in 2 Dimensions)
Model category: saturated flow, solute transport, porous medium, fractures
Au thor s: Huyakorn, P.S.
Current version:
Release date: 1988
First released: 1988	IGWMC Check-date: 03/91
Institution of Model Development: HydroGeolocic, Inc.
1165 Herndon Parkway, Suite 900,
Herndon, VA 22070
Code Custodian: Huyakorn, P.S.
HydroGeologic, Inc.
1165 Herndon Parkway, suite 900, Herndon, VA 22070
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Model Developed for: general use
Documentation: theory, user's guide, examples, verification
Model Testing: verification
Peer Review: concepts, theory
Availability: proprietary, license,- source code {main frame),
compiled (PC) version
Computer Requirements: Intel 80386 based computer, 4 Mb RAM, VGA, math
coprocessor; compiler for larger versions and other
platforms
Abstract:
STAFF2D is a two-dimensional finite element model that simulates
groundwater flow and solute transport in fractured or granular porous
media under confined or unconf med conditions ¦ The code performs
steady-state and transient simulations in a cross-section, an areal plane,
or an axisymmetric configuration. Contaminant transport accounts for
advection and dispersion in fractures and porous matrix blocks, linear
equilibrium sorption and first-order degradation, and single-species or
chain decay. Fractured porous media are represented using discrete
fractures and dual porosity approaches. The model supports a wide variety
of boundary conditions. Spatial discretization is performed using a
combination of linear and rectangular elements. The transport equation is
solved using upstream weighting. STAFF2D also provides an option to use
orthogonal curvilinear elements for single or double well analysis.
Remarks:
The model formulation used in STAFF2D is a descendant of the formulation
used in the FTRANS and TRAFRAP codes presented by Huyakorn et A1 (1983,
1986; see references!. Where possible, the STAFF2D code has been checked
by its authors against available analytical or semi-analytical solutions
and similar numerical codes.
IGWMC Key: 4720 Model name: PRZM-2 (Pesticide Root Zone Model)
Model category: unsaturated flow, solute transport, stochastic simulation
Authors: Carsel,	R.F., C.N. Smith, L.A. Mulkey, L.A., and J.D. Dean
Current version: 1.02
Release date:	02/94
First released:	1984	IGWMC Check-date: 07/94
Institution of Model Development: U.S. EPA, Environmental Research Lab.
College Station Road, Athens, GA 30613
Code Custodian: Carsel, R.F.
U.S. EPA/ORD, Center for Exposure Assessment Modeling
(CEAM), Environmental Research Lab., College Station Road,
Athens, GA 30613-0801
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
research, general use, education
theory, user's guide, examples, verification
verification, lab. datasets
concepts, theory, documentation
public domain, source code, compiled (PC) version
Intel 80386 based computer, 4 Mb RAM, VGA; compiler
for other versions
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Abstract:
PRZM (Pesticide Root zone Model) simulates the vertical movement of
multiple pesticides in the unsaturated zone within and below the root zone
and incorporates parent/daughter relationships. PRZM2 links two
subordinate models: PRZM and VADOFT. PRZM is a one-dimensional
finite-difference model which accounts for pesticide fate and transport in
the crop root zone. This release of PRZM incorporates several features
xn addition to those simulated m the original PliZM code* Spec1fica1ly,
soil temperature simulation, volatilization and vapor phase transport in
soils, irrigation simulation, microbial transformation, and a method of
characteristics (MOO) algorithm to eliminate numerical dispersion. PRZM
is now capable of simulating fate and transport of the parent compound and
up to two daughter species. VADOFT is a one-dimensional finite-element
code which solves the Richard's equation for flow in the unsaturated zone.
The user may make use of the constitutive relationships between pressure,
water content, and hydraulic conductivity to solve the flow equations.
VADOFT may also simulate the fate and transport of two parent and two
daughter products. The codes are linked together with the aid of a
flexible execution supervisor which allows the user to build models
tailored to site-specific situations. In order to perform exposure
assessments, the code is equipped with a Monte Carlo pre- and
post-processor.
Remarks:
Wagner and Ruiz designed an aquifer linkage model PRZMAL to connect PRZM
with the analytical three-dimensional model PLUME3D (IGWMC Key # 5311) .
PRZM (IGWMC Key # 4720) is a one-dimensional finite difference model which
accounts for pesticide fate and transport in the crop root zone. The
version used in RUSTIC includes soil temperature effects, volatilization
and vapor phase transport in soils, irrigation simulation and a method of
characteristics algorithm to eliminate numerical dispersion. This version
of PRZM is capable of simulating fate and transport of the parent and up
to two daughter species.
PRZM, VADOFT and SAFTMOD are part of RUSTIC. RUSTIC (IGWMC Key # 4721)
links these models in order to predict the fate and transport of chemicals
to drinking water wells. The codes are linked together with the aid of a
flexible execution supervisor (software user interface) that allows the
user to build models that fit site-specific situations.
IGWMC Key: 4721 Model name: RUSTIC
Model category: saturated flow, unsaturated flow, solute transport,
stochastic simulation
Authors: Dean, J.D., P.S. Huyakorn, A.S, Donigian, K.A. Voos, et al.
Current version:
Release date: 1989
First released: 1989	IGWMC Check-dates 10/92
Institution of Model Development: Woodward Clyde Consultants
Oakland, California
Code Custodian; Carsel, R.F.
U.S. EPA, Center for Exposure Assessment Modeling (CEAM)
Env. Res. Lab., College Station Road, Athens, GA 30613-0801
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Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
research, general use
theory, user's guide, examples, verification
verification, lab. datasets
concepts, theory, documentation
public domain, source code
compiler
Abstract:
RUSTIC (Risk of Unsaturated/Saturated Transport and Transformation for
Chemical Concentrations) is a software system for calculating the
transport and transformation of organics from land surface to and into
ground-water. It consists of three coupled modules; root zone (PRZM),
unsaturated zone (VADOFT), and saturated zone (SAFTMOD). RUSTIC includes
extensive meteorologic and soil databases. The codes are linked together
with the aid of a flexible execution supervisor (software interface) that
allows the user to build models that fit site-specific situations. For
exposure assessments, the code is equipped with a Monte Carlo pre- and
post-processor. (see remarks for additional comments).
Remarks:
SAFTMOD (IGWMC Key # 4694) is a two-dimensional finite element model that ¦
simulates saturated solute flow and transport in either X-Y or X-Z
configuration. In RUSTIC SAFTMOD is used to simulate flow and transport
in a single (confined or unconfined) aquifer or a leaky two-aquifer system.
PRZM (IGWMC Key # 4720) is a one-dimensional finite difference model which
accounts for pesticide fate and transport in the crop root zone. The
version used in RUSTIC includes soil temperature effects, volatilization
and vapor phase transport in soils, irrigation simulation and a method of
characteristics algorithm to eliminate numerical dispersion. This version
of PRZM is capable of simulating fate and transport of the parent and up
to two daughter species.
VADOFT {IGWMC Key # 4693) is a one-dimensional finite element code that
solves the Richard's equation for flows in the unsaturated zone. The user
may make use of constitutive relationships between pressure, water
content, and hydraulic conductivity to solve the flow equations. VADOFT
also simulates the fate and transport of two parent and two daughter
products. As a module of RUSTIC VADOFT computes the recharge rate and
solute mass flux entering the saturated zone.
IGWMC Key: 4730 Model name: GW-UN/DTCD
Model category: saturated flow, aquifer test analysis
Authors: Karanjac, J., and D. Braticevic
Current version: 1.0
Release date: 1989
First released: 1987	IGWMC Check-date: 06/93
Institution of Model Development: United Nations Dept. of Technical
Cooperation for Development, Water
Resources Branch, New York, New York
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Code Custodian: Edwards, K.A,
U.N. Dept. of Technical Coop, for Developm.
Water Resources Branch, United Nations Building DC-1,
Room 745, New York, NY 10017
Model Developed for: general use, education
Documentation: user's guide, examples
Model Testing:
Peer Review:
Availability: non-proprietary, purchase; compiled (PC) version
Computer requirements: IBM PC/AT, DOS 2.1, 640 Kb RAM, CGA, 10 Mb disk
space, math coprocessor
Abstract:
The UN/DTCD Ground Water Software Series, currently, includes the
following programs for general groundwater evaluation: 1) hydraulic
conductivity calculations and conversions from grain size distributions,
permeameter tests and pumping tests; 2) chemistry data base; 3) aquifer
test data base and analysis (Theis, Jacob, Hantush, recovery, Rushton's
dug well test); 4) well construction and hydraulics (including well
functions and step-drawdown test); 5) water level data base and hydrograph
presentation; 6) well logs and lithologieal cross-sections and database,*
7) finite difference models for steady-state or transient two-dimensional
flow in an isotropic aquifer with conversion form confined to unconfined
conditions; and 8) FD model for steady-state or transient flow in an
unconfined isotropic aquifer with a fresh-/saltwater interface. Results
can be displayed text format or graphically on screen or on output device.
IGWMC Key: 4750 Model name: AQ-AP
Model category: saturated flow
Authors: Kovar, K., and A. Leijnse
Current version:
Release date: 3/89
First released: 1987	IGWMC Check-date: 01/92
Institution of Model Development: Nat. Inst, of Public Health and
Env. Prot., Bilthoven, The Netherlands
Code Custodian: Kovar, K.
RIVM - Nat. Inst, for Public Health and Environm.
Protection, P.O. Box 1, 3720 BA Bilthoven, The Netherlands
Model Developed for
Documentation
Model Testing
Peer Review
Availability
Computer requirements
Abstract:
research, general use
theory, user's guide, examples
verification, field datasets
concepts, theory
proprietary, purchase; compiled (PC) version
IBM PC/AT, 640 Kb RAM, VGA, math coprocessor
AQ-AP is a menu-driven computer program for computation of drawdowns due
to well pumpage in a homogeneous infinite, multi-layered aquifer-aquitard
system using superposition of analytical solutions. The program includes
helps screens and error-checking and facilitates graphic display of
results.
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IGWMC Key: 4751 Model name: AQ-AT
Model category: saturated flow
Authors: Kovar, K., and A. Leijnse
Current version:
Release date: 3/89
First released: 1987	IGWMC Check-date: 01/92
Institution of Model Development: Nat, Inst, of Public Health and
Env, Prot.» Bilthoven, The Netherlands
Code Custodian: Kovar, K.
RIVM - Nat. Inst, for Public Health and Environm.
Protection, P.O. Box 1, 3720 BA Bilthoven, The Netherlands
Model Developed for: research, general use
Documentation: theory, user's guide, examples
Model Testing: verification, field datasets
Peer Review: concepts, theory
Availability; proprietary, purchase; compiled (PC) version
Computer requirements: IBM PC/AT, 640 Kb RAM, VGA, math coprocessor
Abstract:
AQ-AT is a computer program package for aquifer test analysis due to
pumpage in a homogeneous infinite multi-layered aquifer-aquitard system.
The menu-driven package includes modules for confined and leaky-confined
systems and provides the best estimate for aquifer and aquitard parameters
and corresponding uncertainty using least squares optimization. The
program includes help screens and error checking. It has options for
joint graphic display of observed drawdowns (input) and computed drawdowns
using the estimated parameters.
IGWMC Key: 4752 Model name: AQ-AS
Model category: saturated flow
Authors: Kovar, K
Current version:
Release date: 3/89
First released: 1987
and A. Leijnse
IGWMC Check-date: 01/92
Institution, of Model Development: Nat. Inst, of Public Health and
Env. Prot., Bilthoven, The Netherlands
Code Custodian: Kovar, K.
RIVM - Nat. Inst, for Public Health and Environm.
Protection, P.O. Box 1, 3720 BA Bilthoven, The Netherlands
Model Developed for:
Documentation:
Model Testing:
Peer Review:
research, general use
theory, user's guide, examples
verification, field datasets
concepts, theory
Availability: proprietary, purchase; compiled (PC) version
Computer requirements: IBM PC/AT, 64 0 Kb RAM, VGA, math coprocessor
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Abstract:
AQ-AS is a computer program package for calculation of ground-water
streamlines and isoehrones due to well pumpage and natural flow in
homogeneous infinite multi-layered aquifer-aquitard systems. The program
is based on superposition of analytical solutions and includes both
forward and backward particle tracking using Runge-Kutta integration. The
menu-driven interactive program computes and displays streamline geometry,
traveltimes, and isoehrones. It includes help screens and error checking.
IGWMC Key; 4753 Model name: AQ-FEM
Model category: saturated flow
Authors: Leijnse, A., and K. Kovar
Current version:
Release date: 3/89
First released: 1988	IGWMC Check-date: 01/92
Institution of Model Development: Nat. Inst, of Public Health and
Env. Prot., Bilthoven, The Netherlands
Code Custodian: A. Leijnse
RIVM - Nat. Inst, for Public Health and Environin.
Protection, P.O. Box 1, 3720 BA Bilthoven, The Netherlands
Model Developed for: research, general use
Documentation:
Model Testing:
Peer Review:
Availability;
Computer requirements:
theory, user's guide, examples
verification, field datasets
concepts, theory
proprietary, purchase; compiled (PC) version
IBM PC/AT, 640 Kb RAM, math coprocessor
Abstract:
AQ-FEM is a finite element model for computation of the head distribution
in a multi-layered, anisotropic heterogeneous aquifer-aquitard system.
The model handles both steady-state and transient flow conditions. The
program package consists of 3 modules: (1) AQ-EG is a finite element grid
generator, AQ-DD is used to allocate spatially variable data to the FEM
grid, and (3) AQ-EP is the finite element simulator. The program is
menu - driven and has extensive error checking, help features and graphic
post-processing.
IGWMC Key: 4754 Model name: AQ-EF
Model category: saturated flow
Authors: Leijnse, A., and K. Kovar
Current version:
Release date: 3/89
First released: 1988	IGWMC Check-date: 01/92
Institution of Model Development: Nat. Inst, of Public Health and
Env. Prot,, Bilthoven, The Netherlands
Code Custodian: A. Leijnse
RIVM - Nat. Inst, for Public Health and Environx.
Protection, P.O. Box 1, 3720 BA Bilthoven, The Netherlands
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Model Developed for:	research, general use
Documentation:	theory, user's guide, examples, verification
Model Testing:	verification, field datasets
Peer Review:	concepts, theory
Availability;	proprietary, purchase; compiled {PC) version
Computer requirements:	IBM PC/AT, 640 Kb RAM, math coprocessor
Abstract:
AQ-EF is a menu-driven, interactive computer program package for
calculation of ground-water streamlines and isochrones in multi-layered,
anisotropic heterogeneous aquifer-aquitard systems with steady-state or
transient flow conditions. The program handles forward or backward
particle tracking using the head distribution values computed by the
program AQ-FEM. The package includes a module for plotting of the results.
IGWMC Key: 4800 Model name: HELP (Hydrologic Evaluation of Landfill
Performance)
Model category: unsaturated flow, surface runoff
Authors: Schroeder, P.R., J.M. Morgan, T.M. Walski, and A.C. Gibson
Current version: 3.0
Release date: 1993
First released: 19B4	IGWMC Check-date: 10/92
Institution of Model Development: U.S. Army Corps of Engineers, Waterways
Exp. Station, Vicksburg, Mississippi
Code Custodian: Schroeder, P.R.
U.S. Army Corps of Eng., Water Resources Eng. Group
Waterways Experiment Station, P.O. Box S31, Vicksburg, MS
39180
Model Developed for:
Documentation:
Model Testing;
Peer Review:
Availability:
Computer Requirements:
general use
theory, user's guide, examples, verification
verification, lab. datasets, field datasets, code
intercomparison
concepts, theory
public domain, source code, compiled (PC) version
IBM PC/AT, DOS 2.1, 640 Kb RAM, CGA, math coprocessor
Abstract:
HELP is a layered, water budget (moisture routing) model for hydrologic
evaluation of landfill performance. Gravitational forces are assumed to
be dominant? capillary forces are neglected. It facilitates rapid
estimation of the amounts of surface runoff, subsurface drainage, and
leachate from landfills. In the model precipitation is partitioned into
surface storage, runoff, percolation, evapotranspiration, soil moisture
storage, and lateral drainage using a quasi - two-dimensional approach. The
runoff is computed using the SCS runoff curve number method and
percolation by Darcy's law applied to unsaturated conditions. Lateral
drainage is computed from a modified non-linearized Boussinesq equation.
Evapotranspiration is calculated using a modified Penman method.
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Remarks:
The HELP model requires climatologic data, soil characteristics, and
design specifications, Climatologic data include daily precipitation,
mean monthly temperatures, mean monthly solar radiation, leaf area
indices, root zone or evaporation depth, and winter cover factors. Soil
characteristics include porosity, field capacity, wilting point, saturated
hydraulic conductivity, water transmissivity evaporation coefficient, and
the SCS runoff curve number for antecedent moisture condition II.
Furthermore, the HELP model requires as design specifications the number
of layers and their description, including type, thickness, slope, and
maximum lateral distance to a drain. The HELP model maintains a
climatologic data base and default soil characteristics for 21 soils.
The models UNSAT1D and HELP have been compared for their use in evaluating
the design of landfill covers (Thompson and Tyler, 1984; see references).
Under humxd conditions the two codes predicted similar fluxes through the
clay caps. Under semi-humid and arid conditions the HELP code predicted
significantly greater moisture storage in the cover soil, whereas UNSAT1D
predicted the water would migrate upward from cap and waste and would be
lost to evaporation. This reflects UNSAT1D1s ability to handle capillary
forces, which become important under dryer conditions.
Landfill systems modeled by HELP include various combinations of
vegetation, cover soils, waste cells, special drainage layers, and
impermeable barrier soils, as well as synthetic membrane liners and
drainage nets. The model includes features to simulate frozen soil
effects, leachate recirculation and subsurface inflow, leakage through
liners and snowmelt. Version 3.0 includes a large library of default and
user-defined soil and material properties.
The lateral drainage component of the HELP model has been verified using
laboratory drainage data from two large scale physical models of
landfill/drainage systems (Schroeder and Peyton, 1987; see references).
The drainage tests were run to examine the effects of drainage length,
slope, hydraulic conductivity, and depth of saturation on the lateral
drainage rate. Predicting the depth of saturation proved difficult; the
same was the case for the lateral drainage rate. More successful was the
team in predicting cumulative drainage rates.
A study to verify the HELP model using existing filed data from 20
landfill cells at 7 sites was documented by Schroeder and Peyton (1987;
see references). Simulations were run and predicted water balances were
compared with measured ones. Comparisons were made for runoff,
evapotranspiration, lateral drainage to collection systems, and
percolation through liners. HELP showed to do well in predicting leachate
drainage from under large infiltration rates; poor under very small
infiltration rates. Other components were reasonably well within the
accuracy of the field data.
CREAMS and HELP have been reviewed and tested by Barnes and Rogers (1987,
1988; see references) for their functionality in designing stable landfill
covers. Studies of parameters for land disposal unit design at several
sites, assuming a variety of regionally possible plant covers were carried
out. They concluded that overall predictions of soil moisture using
CREAMS more closely resembled measured soil moisture than those obtained
with HELP (version 1).
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IGWMC Key: 4810 Model name: EQ3/EQ6
Model category: hydrogeochemical
Authors: Wolery, T.J.
Current version; 7.1
Release date*. 1988
First released: 1975	IGWMC Check-date: 11/92
Institution of Model Development: Lawrence Livermore Nat. Lab.
P.O. Box 808, Livermore, CA 94550
Code Custodian: Jackson, K.J.
Lawrence Livermore Lab,, Earth Sc. Div.
P.O. Box 808, L-219, Livermore, CA 94550
Model Developed for: research, general use
Documentation; theory, user's guide, examples, program structure,
code listing, verification
Model Testing: verification, lab. datasets, code intercomparison
Peer Review: concepts, theory, coding, accuracy, documentation
Availability: proprietary, purchase? source code
Computer Requirements: compiler
Abstract:
EQ3 is a geochemical aqueous speciation/solubility program that can be
used alone or in conjunction with EQ6, which performs reaction-path
calculations. EQ3 calculates the distribution of chemical species (ions,
neutral species, ion-pairs, and complexes). The program EQ3/EQ6
accommodates 47 elements, 686 aqueous species, 15 gases, over 16 redox
elements, and 716 minerals. The code embodies a ion-association
conceptual model of solution behavior and simulates geochemical reactions
using Newton-Raphson solution method. The code requires geochemical data
for each solid, gaseous or dissolved chemical species being modeled. The
data bases accompanying the code are for testing purposes only. A
separate precipitation kinetics option has been added.
Remarks:
The 1988 version includes a main data file with information on 47 chemical
elements, 686 aqueous species, 716 pure minerals, 16 solid solutions, and
11 gases• Another improvement permits the modeling of brines using
Pitzer's equations.
IGWMC Key: 4820 Model name: EQUILIB
Model category: hydrogeochemical
Authors; Morrey,	J.R. , and D.W. Shannon
Current version:
Release date:	1981
First released:	1978	IGWMC Check-date: 11/92
Institution of Model Development: Battelle Pacific Northwest
Laboratories, Environm. Sciences Div.
P.O. Box 999, Richland, WA 99352
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Code Custodian: Electric Power Software Center
Electric Power Research Inst. (EPRI)
P.O. Box 10412, Palo Alto, CA 94303-9743
Model Developed for;	general uae
Documentation:	user's guide
Model Testing:
Peer Review:
Availability:	proprietary,
Computer requirements:	compiler
license; source code
Abstract:
EQUILIB models chemical equilibria in geothermal brines at various
elevated temperatures (0 - 300 degrees C). Its data base contains 26
elements, 200 aqueous species, 7 gases, 186 minerals, and it includes 9
redox reactions. The code uses ligand projection method of solution, and
the activity coefficient is provided by the extended Debye-Huckel
equation. It has been verified and partially validated by comparing it to
four other geochemical codes and to five laboratory experiments. EQUILIB
has been applied to studying mineral formation and corrosion in geothermal
brines.
IGWMC Key: 4830 Model name: GEOCHEM
Model category; hydrogeochemical
Authors: Sposito, G., and S.V. Mattigod
Current version:
Release date: 1980
First released: 1980	IGWMC Check-date; 11/92
Institution of Model Development: Univ. of California - Riverside, Dept.
of Soil and Environm. Sc.
Riverside, CA 92521
Code Custodian: Sposito, G.
Univ. of California - Riverside, Dept. of Soil and
Environm. Sciences, Riverside, CA 92521
Model Developed for;
Documentation:
Model Testing.*
Peer Review:
Availability:
Computer Requirements;
general use
theory, user's
public domain,
compiler
guide, examples
source code
Abstract:
GEOCHEM is a program for predicting the equilibrium distribution of
chemical species in soil solution and other natural water systems. The
programs data base includes 45 elements, 1853 aqueous species, 889 organic
ligands, 3 gases, and 250 minerals and solids. It includes a mass balance
for each species and can handle 7 redox reactions and cation adsorption
and exchange. The Newton-Raphson solution method is used, and a Davies
equation provides the activity coefficient. Sorption is handled by a
surface complexation model.
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Remarks:
Results from four chemical- equilibrium computer programs, REDEQL.EPA,
GEOCHSM, WATEQF, and SBNSCA2, have been compared with experimental
solubility data for some simple systems of interest with geo'thermal
brines: Kerrisk, J.F. 1981. Chemical Equilibrium Calculations for
Aqueous Geothermal Brines. LA-8851-MS, Los Alamos Scientific Lab., Los
Alamos, New Mexico.
IGWMC Key; 4840 Model name: MINEQL2
Model category: hydrogeochemical
Authors: Westall, J.C., Z.L. Zachary, and F.M.M. Morel
Current version:
Release date: 1980
First released: 1980	IGWMC Check-date: 09/90
Institution of Model Development: unknown
Code Custodian: Morel, F.M.M.
Massachussets Inst, of Technology, Dept. of Civil Eng.
Cambridge, MA 02139
Model Developed for: research, general use
Documentation:
Model Testing:
Peer Review:
Availability: public domain, source code
Computer requirements: compiler
Abstract:
MINEQL2 is a program for the calculation of chemical equilibria in aqueous
systems. It includes mass balance calculations for each component, redox
reactions, and surface adsorption.
IGWMC Key: 4850 Model name: MINTEQ/MINTEQ2
Model category: hydrogeochemical
Authors: Felmy, A.R., D.C. Girvin, and E.A. Jenne
Current version:
Release date: 1983
First released: 1984	IGWMC Check-date: 01/93
Institution of Model Development: Battelle Pacific Northwest
Laboratories, Environm. Sciences Div.
P.O. Box 999, Richland, WA 99352
Code Custodian; Jenne, E.A.
Battelle Pacific NW Laboratories
P.O. Box 999, Richland, WA 99352
Model Developed for: research, general use
Documentation: theory, user's guide, examples, program structure,
code listing, verification
Model Testing: lab. datasets, code intercomparison
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Peer Review: concepts, theory, documentation
Availability: public domain, source code
Computer Requirements: compiler
Abstract:
MIKTSQ is a user-friendly program for calculation of the equilibrium
behavior of various metals. It includes a complex series of reactions
among solution species, gases, solids, and sorbed phases, including ion
speciation/solubility, adsorption, gas phase equilibria, and
precipitation/dissolution of solid phases. The thermodynamic data in
MINTEQ was taken from the WATEQ3 data base and has been further expanded
and updated using published critical reviews. Originally, MINTEQ included
31 elements, 373 aqueous species, 3 gases, and 328 solids. Its data base
is being updated on a regular basis. The program calculates mass balance
for each component, and includes redox reactions, ion exchange and six
surface complexation models.
Remarks:
MINTEQ2 (Morey et al. 1985) has been developed to assess solubilities
provided that appropriate therrnochemical data for organic and inorganic
aqueous species are available. The code accepts an assemblage of gaseous
and solid phases in contact with the aqueous phase and calculates the
therrnochemical equilibrium between these phases. MINTEQ2 uses a generic
database containing among others organic reactions and associated
equilibrium constants, specifically for organic ligands that commonly
complex with metal ions and generally increase the solubility of metals in
water.
MINTEQ belongs to the REDEQL family of hydrogeochemical speciation codes.
MINTEQ was developed by combining the algorithms from the USGS code WATEQ3
(Ball et all 1981) and the MINEQL code (Westall et al 1976).
MINTEQA1 (Brown and Allison, 1987} is an addition to the MINEQL and WATEQF
series of equilibrium geochemical models. With the exception of expanded
matrix dimensions, minor overrun fixes, and a substantially expanded data
base, MINTEQA1 is nearly identical to the original MINTEQ. EPA's
Environmental Research Laboratory, Athens, Georgia, developed an
accompanying preprocessor, PRODEFAl, complete with error checking and
extensive help facilities. The preprocessor was based on PRODEF which was
developed by Battelle Pacific NW Lab. MINTEQA2 is the successor to
MINTEQA1 (see IGWMC # 4852) .
MEXAMS, the Metal Exposure Analysis Modeling System, links MINTEQ, an
equilibrium geochemical model, with EXAMS, an aquatic exposure assessment
model. MEXAMS includes a user-friendly interface. Felmy, A.R., S.M.
Brown, Y. Onishi, S.B, Yabusaki, and R.S. Argo. 1984. MEXAMS--The Metals
Exposure Analysis Modeling System. EPA-600/3 -84-031, U.S. Environm.
Protection Agency, Environm. Res. Lab., Athens, Georgia.
IGWMC Key: 4852 Model name: MINTEQA2
Model category: hydrogeochemical
Authors: Allison, J.D., D.S. Brown and K.J. Novo-Gradac
Current version: 3,11
Release date: 12/91
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First released:	IGWMC Check-date: 06/93
Institution of Model Development: U.S. EPA, Environmental Research Lab,
College Station Road, Athens, GA 30613
Code Custodian; Carsel, R.F.
U.S. EPA, Center for Exposure Assessment Modeling (CEAM)
Env. Res. Lab., College Station Road, Athens, GA 30613-0801
Model Developed for:
Documentation:
Model Testing:
Peer Review;
Availability:
Computer Requirements:
research, general use
concepts, user instructions,
example problems
concepts
public domain, source code, compiled {PC) version
IBM PC/AT, DOS 3.0, 640 Kb RAM, CGA; compiler for
other platforms
Abstract:
MINTEQA2 is a geochemical equilibrium speciation model for dilute aqueous
systems. It can be used to calculate the mass distribution between the
dissolved, adsorbed and multiple solid phases under a variety of
conditions including a gas phase with constant partial pressure. There
are seven different algorithms for adsorption available. Input data
consist of total dissolved concentrations for the component of interest,
and optionally, parameters such as partial pressure of one or more gases,
pH and pe may be specified as a measured value or calculate by the
program. A mineral may be specified as at equilibrium with the solution,
and either 1) subject to dissolution if conditions warrant, or 2) not
subject to complete dissolution. MINTEQA2 has an extensive thermodynamic
database that is adequate for solving a broad range of problems without
need for additional user-supplied equilibrium constants. MINTEQA2 comes
with a preprocessor PR0DEFA2.
Remarks:
MINTEQA1 (Brown and Allison, 1987) is an addition to the MINEQL and WATEQF
series of equilibrium geochemical models. With the exception of expanded
matrix dimensions, minor overrun fixes, and a substantially expanded data
base, MINTEQA1 is nearly identical to the original MINTEQ. EPA's
Environmental Research Laboratory, Athens, Georgia, developed an
accompanying preprocessor, PRODEFA1, complete with error checking and
extensive help facilities. The preprocessor was based on PRODEF which was
developed by Battelle Pacific NW Lab. MINTEQA2 is the successor to
MINTEQA1.
IGWMC Key: 4860 Model name: PROTOCOL (PROgram TO correlate Leaching
data)
Model category: hydrogeochemical
Authors: Pickrell, G., and D.D. Jackson
Current version:
Release date: 1984
First released: 1984	IGWMC Check-date: 12/92
Institution of Model Development: Lawrence Livermore Nat. Lab.
P.O. Box 808, Livermore, CA 94550
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Code Custodian: Jackson, D.D.
Lawrence Livermore Lab., Earth Sc. Div.
P.O. Box 808, L-329, Livermore, CA 94550
Model Developed for: research, general use
Documentation: theory, user's guide, examples
Model Testing:
Peer Review:
Availability: public domain, source code
Computer requirements: compiler, DISSPLA graphics library
Abstract:
PROTOCOL is a coupled kinetic/equilibrium program for calculating
dissolution reactions of inorganic solids in aqueous solution, with
specific application to corrosion of vitrified nuclear waste by
groundwater. PROTOCOL was designed to function as a generic simulator
without specific rate expressions or leaching mechanisms. Such functions
may be input to the program as submodels. Initially three submodels have
been incorporated. The program incorporates equilibrium routines from the
program MINEQL and includes an extensive thermodynamic data base.
IGWMC Key: 4870 Model name: REDEQL-EPA
Model category: hydrogeochemical
Authors: Ingle, S.E., M.D. Schuldt, and D.W. Schults
Current version:
Release date: 1978
First released:	IGWMC Check-date: 12/91
Institution of Model Development: U.S. EPA, Hatfield Marine Sciences
Center, Newport, OR 97365
Code Custodian: Schults, D.W.
U.S. EPA/ORD, Hatfield Marine Sciences Center
Newport, OR 97365
Model Developed for: research, general use
Documentation: theory, user's guide, examples, program structure,
code listing
Model Testing:
Peer Review: concepts, theory
Availability: public domain, source code
Computer Requirements: compiler
Abstract:
REDEQL.EPA is a program to compute aqueous equilibria for up to 20 metals
and 30 ligands in a system. It includes 46 elements, 94 aqueous species, 2
gases, and 13 minerals/solids. It calculates mass balances, and handles
precipitation, redox reactions, complexation and pH-dependent phenomena.
Remarks:
Results from four chemical- equilibrium computer programs, REDEQL.EPA,
GEOCHEM, WATEQF, and SENECA2, have been compared with experimental
solubility data for some simple systems of interest with geothermal
brines: Kerrisk, J.F. 1981. Chemical Equilibrium Calculations for
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Aqueous Geothermal Brines. LA-8851-MS, Los Alamos Scientific Lab., Los
Alamos, New Mexico.
REDEQL.EPA and REDEQL-UMD are modifications of the program REDEQL2
developed at the California Inst, of Technology (McDuff and Morel, 1975,
and Morel and Morgan, 1972) .
IGWMC Key: 4871 Model name: REDEQL-UMD
Model category: hydrogeochemical
Authors: Harriss, D.K., S.E. Ingle, D.K. Taylor, and V.R. Magnuson
Current version:
Release date: 19 84
First released: 1984	IGWMC Check-date: 12/92
Institution of Model Development: Univ. of Minnesota, Dept. of Chemistry
Duluth, MN 55812
Code Custodian: Magnuson, V.R.
Univ. of Minnesota, Dept. of Chemistry
Duluth, MN 55812
Model Developed for:	research, general use
Documentation:	theory, user's guide, examples, program structure
Model Testing:
Peer Review:
Availability:	public domain, source code
Computer Requirements:	compiler
Abstract:
REDEQL-UMD is a program to compute equilibrium distributions of species
concentrations in aqueous systems. The basic equilibria which may be
treated include complexation, precipitation, oxidation-reduction, and
adsorption. The standard version allows simultaneous consideration of
reactions involving 20 metals and 30 ligands. Similarly, up to 20 redox
reactions can be handled. The accompanying data base includes relevant
data on the metals and ligands, thermodynamic stability constants for
complexes, mixed complexes, redox reactions, solids, and mixed solids, and
includes 53 elements, 109 aqueous species, and 158 minerals. It
calculates the mass balance of each species.
Remarks:
REDEQL.EPA and REDEQL-UMD are modifications of the program REDEQL2
developed at the California Inst, of Technology {McDuff and Morel, 1975,
and Morel and Morgan, 1972).
IGWMC Key: 4880 Model name: SOLMNEQ/SOLMNEQF
Model category: hydrogeochemical
Authors: Kharaka, Y.K., and I. Barnes
Current version:
Release date: 1988
First released: 1973	IGWMC Check-date: 04/92
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Institution of Model Development: U.S. Geological Survey, Water Resources
Div., Menlo Park, CA 94025
Code Custodian: Kharaka, Y.K.
U.S. Geological Survey, Water Resources Div.
M.S. 427, 345 Middlefield Road, Menlo Park, CA 94025
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
research, general use
theory, user's guide
public domain,
compiler
source code
Abstract:
SOLMNEQ is a program, originally written in PL/1, for computing the
equilibrium distribution of species in aqueous solution over a temperature
range of 0 to 350 degrees C. The program includes 26 elements, 162
aqueous species, and 158 minerals. It calculates the mass balance of each
element and includes redox reactions, The logic of the program has been
developed in part following the logic of WATCHEM and WATEQF. A FORTRAN
version was published in 1988 as SOLMNEQF. SOLMNEQF calculates the
equilibrium distribution of 236 species including uranium, vanadium, and 18
organic species of acetate, oxylate, and succinate, as well as the
saturation states of 196 minerals (see remarks)
Remarks:
SOLMEQF can be used for simulating the effects on pH and solubility
resulting from : 1) a change in temperature, 2) addition of gases lost
before pH measurement, 3} isothermal mixing of two solutions, 4)
precipitation/dissolution of a given amount of a solid, and 5) the loss of
steam by boiling.
IGWMC Key: 4881 Model name: SOLMNQ
Model category: hydrogeochemical
Authors: Goodwin, B.W., and M. Munday
Current version:
Release date: 1983
First released; 1983	IGWMC Check-date: 09/90
Institution of Model Development: Atomic Energy of Canada, Ltd.,
Whiteshell Nuclear Res. Establ.
Pinawa, Manitoba, Canada
Code Custodian: Goodwin, B.W.
Atomic Energy of Canada, Ltd.
Whiteshell Nuclear Research Estb., Pinawa, Manitoba ROE
1LO, Canada
Model Developed for:	research, general use
Documentation:	concepts and theory, flow charts, input
instructions, example problems
Model Testing:
Peer Review:
Availability:	proprietary, license,* source code
Computer requirements:	compiler
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Abstract:
SOLMNQ is an interactive chemical speciation program that calculates
equilibrium distributions for inorganic aqueous species often found in
groundwater. The program is based on the SOLMNEQ program published in
1973. It includes 28 elements, 239 aqueous species and 181 solids. The
input for the program is the chemical composition including pH and
oxidation potential, and the temperature of the analysis. The program
calculates equilibrium concentrations of aqueous species and complexes,
and the degree of saturation of a number of common solids and minerals *
The model1s database includes uranium and plutonium aqueous and solid
species.
IGWMC Key: 4882 Model name: SOLMINEQ,88
Model category: hydrogeochemical
Authors: Kharaka, Y.K.
Current version:
Release date: 1988
First released: 1973
W.D. Gunter, P.K, Aggarwal, E.H. Perkins, et al.
IGWMC Check-date: 03/91
Institution of Model Development: U.S. Geological Survey, Water Resources
Div., Menlo Park, CA 94025
Code Custodian: Kharaka, Y.K.
U.S. Geological Survey, Water Resources Div.
M.S. 427, 345 Middlefield Road, Menlo Park, CA 94025
research, general use
theory, user's guide, examples, program structure,
code listing, verification
verification
concepts, theory, documentation
Availability: public domain, source code
Computer Requirements: compiler
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Abstract:
SOLMINEQ.88 is an updated version of SOLMNEQ, first published in 1973,
SOLMNEQ? (19 86), and several unpublished versions of the code. The
computer program can 'be used to model speciation, saturation,
dissolution/precipitation, ion exchange/adsorption, mixing, boiling, and
gas partitioning between water, oil, and gas phases. The program is
especially useful for modeling water-rock interactions in sedimentary
basins where high temperatures, pressures, salinities, and dissolved
organic species prevail. SOLMINEQ.88 has a database of 260 inorganic and
80 organic aqueous species and 220 minerals. It computes the activity
coefficients in brines using Pitzer equations, and computes pH and mineral
solubilities at subsurface temperatures and pressures.
Remarks:
S0LINPU7 is an interactive computer program designed to create and modify
input files for the geochemical code SOLMINEQ.88. DeBraal, J.D., and Y.K.
Kharaka. 1989. SOLINPUT: A Computer Code to Create and Modify Input
Files for the Geochemical Program SOLMINEQ.88, Open-File Report 89-616,
U.S. Geological Survey, Menlo Park, Calif.
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IGWMC Key: 4890 Model name: WATEQ2/WATEQ4F
Model category: hydrogeochemical
Authors: Ball, J.W., E.A. Jenne, and D.K. Nordstrom
Current version: 2.0
Release date: 02/92
First released: 1979	IGWMC Check-date: 07/94
Institution of Model Development: U.S. Geological Survey, Water Resources
Div., Menlo Park, CA 94025
Code Custodian: Ball, J.W.
U.S. Geological Survey, Water Resources Div.
M.S, 21, 345 Middlefield load, Menlo Park, CA 94025
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
research, general use, education
theory, user's guide, examples, program structure,
code listing, verification
verification, lab. datasets
concepts, theory, documentation
public domain, source code, compiled
IBM PC/AT, 640 Kb RAM, CGA; compiler
platforms
(PC) version
for other
Abstract:
WATEQ2, written in PL/1, is a chemical equilibrium model for calculating
aqueous speciation of major and minor elements among naturally occurring
ligands. It uses field measurements of temperature, pH, Eh, dissolved
oxygen and alkalinity, and the chemical analysis of a water sample as
input and calculates and calculates the distribution of aqueous species,
ion activities, and mineral saturation indices that indicate the tendency
of a water to dissolve or precipitate a set of minerals. The program
solves a set of nonlinear mass action and mass balance equations using
the continued fraction method. WATEQ2 is a modified version of the WATEQ
(1974) and WATEQF (1976) programs.
WATEQ4F is a FORTRAN program for the calculation of chemical
equilibrium m natural waters. Xt models the thermodynamic
speciation of major and important minor inorganic ions and complex
species in solution for a given water analysis and in-situ
measurements of tempersture, pH, and redox potential. From this model the
states of reaction of the water with solid and gaseous phases are
calculated. The examination of reaction states may suggest the origin of
the dissolved constituents and assist in the prediction of the chemical
effects of ground-water production, recharge, irrigation, and inorganic
pollution. WATEQ4F is the latest version of WATEQ and includes several
revisions to the thermodynamic data base including the addition of
selenium and uranium species as well as the recently published values of
Nordstrom et al. (1990). The preprocessor WQ4INPT is distributed with
WATEQ4F which allows the user to create and modify input files of
analytical data. Program results are saved in text files.
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IGWMC Key: 4891 Model name: WATEQ3
Model category: hydrogeochemical
Authors: Ball, J.W., E.A. Jenne, and M.W. Cantrall
Cmnr0nt vsx"S ion *
Release date: 1982
First released: 1981	IGWMC Check-date: 11/92
Institution of Model Development: U.S. Geological Survey, Water Resources
Div., Menlo Park, CA 94025
Code Custodian: Ball, J.W.
U.S. Geological Survey, Water Resources Div.
M.S, 21, 345 Middlefield Road, Menlo Park, CA 94025
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
research, general use
theory, user's guide, examples, code listing,
verification
verification
concepts, theory, documentation
public domain, source code
compiler
Abstract:
WATEQ3 is a chemical equilibrium model for calculating aqueous speciation
of major and minor elements among naturally occurring ligands, including
uranium species. The program, which is based on WATEQ2, calculates the
mass balance of the species and handles redox reactions and gases. The
Newton-Raphson solution technique is used to solve for 30 elements, 227
aqueous species, 12 organic ligands, and 309 precipitation/dissolution
minerals. The activity coefficient is calculated by the Debye-Huckel
equation. The thermodynamic data base of the code is thoroughly
documented and evaluated. WATEQ3 has been used extensively in field
ground water investigations of the USGS.
Remarks:
To be able to handle the water-soluble pollutants that may result from the
disposal of nuclear waste and retorted oil-shale, pertinent thermodynamic
data have been added to the WATEQ3 data base by Krupka and Jenne (1982;
see references).
IGWMC Key: 4900 Model name: SLAM (Steady Layered Aquifer Model)
Model category: saturated flow
Authors: Aral, M.M.
Current version:
Release date: 1990
First released: 1984	IGWMC Check-date: 09/90
Institution of Model Development: Georgia Inst, of Technology, Dept. of
Civil Eng., Atlanta, GA 30332
Code Custodian: Aral, M.M.
Georgia Inst, of Technology, School of Civil Eng.
Atlanta, GA 30322
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Model Developed for
Documentation
Model Testing
Peer Review
Availability
Computer Requirements
general use, education
theory, user's guide, examples, verification
verification
concepts, theory, documentation
proprietary, purchase; compiled (PC) version
IBM PC/AT, DOS 2.1, 640 Kb RAM, math coprocessor, CGA
Abstract:
SLAM is a quasi -threedimensional finite element groundwater model for
simulation of steady-state flow in multilayered heterogeneous,
(an)isotropic aquifers. The model can handle a system of up to five
(leaky-)confined aquifers with the top aquifer either confined or
unconfined. Boundary conditions include prescribed head, prescribed flux,
mixed type (e.g., induced recharge from stream), recharge in top aquifer
(if unconfined), and sources/sinks (wells) screened in one or more
aquifers.
IGWMC Key: 4901 Model name: ULAM (Unsteady Layered Aquifer Model)
Model category: saturated flow
Authors: Aral, M.M.
Current version:
Release date: 1990
First released: 1984	IGWMC Check-date: 09/90
Institution of Model Development: Georgia Inst, of Technology, Dept. of
Civil Eng.
Atlanta, GA 30332
Code Custodian; Aral, M.M.
Georgia Inst, of Technology, School of Civil Eng.
Atlanta, GA 30322
Model Developed for: general use, education
Documentation: theory, user's guide, examples, verification
Model Testing: verification
Peer Review: concepts, theory, documentation
Availability: proprietary, purchase; compiled (PC5 version
Computer Requirements: IBM PC/AT, DOS 2.1, 640 Kb RAM, CGA, math coprocessor
Abstract:
ULAM is a quasi *threedimensional finite element model for simulation of
unsteady flow in multilayered heterogeneous (an-)isotropic aquifers. Both
Dirichlet and Neuman type boundary conditions are supported. The model
can handle up to 5 layers and supports confined, semi-confined and
water-table conditions. The model allows multiple wells with filters in
on or more aquifers, recharge in the top aquifer, and induced infiltration
from streams.
IGWMC Key: 4910 Model name: BIOPLUME II
Model category: saturated flow, solute transport
Authors: Rifai, H.S., P.B. Bedient, R.C. Bordon, and J.F. Haasbeek
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Current version: 1.1
Release date: 10/89
First released: 1987	IGWMC Check-date: 07/94
Institution of Model Development: Rice Univ., Dept.of Env. Sc. and Eng.
P.O. Box 1892, Houston, Texas 77251
Code Custodian: Rifai, H.S.
Rice Univ., Dept. of Env. Sc. and Eng.
P.O. Box 1892, Houston, TX 77251-1892
Model Developed for: research, general use, education
Documentation: theory, user's guide, examples, code listing,
verification
Model Testing: verification, lab. datasets, field datasets
Peer Review: concepts, theory, documentation
Availability: public domain, compiled (PC) version
Computer Requirements: IBM PC/AT, DOS 2.0, 640 Kb RAM, CGA, math coprocessor
Abstract:
BIQPLUME II is a two-dimensional solute transport model to compute changes
in concentration over time due to advection, dispersion, mixing, and
retardation. The• rr.odel simulates the transport of dissolved hydrocarbons
under influence of oxygen-limited biodegradation. It also simulates
reaeration and anaerobic biodegradation as a first order decay in
hydrocarbon concentrations. BIOPLUME II is based on the USGS 2D solute
transport model MOC {Konikow-Bredehoef15. It solves the transport
equation twice: once for hydrocarbon and once for oxygen. As a result,
two plumes are computed at every time step, and the two plumes are
combined using the principle of superposition. The model assumes an
instantaneous reaction between oxygen and hydrocarbon. It can simulate
natural biodegradation processes, retarded plumes, and in-situ
bioremediation schemes. The model allows injection wells to be specified
as oxygen sources into a contaminated aquifer. It also provides three
additional oxygen sources: 1) initial dissolved oxygen in the
uncontaminated aquifer; 2) natural recharge of oxygen across the
boundaries; and 3) vertical exchange of oxygen from the unsaturated zone.
BIOPLUME II comes with a preprocessor and handles a 20 X 30 cell grid.
The also comes with a postprocessor which can convert output data to a
format usable by commercial contouring packages.
IGWMC Key: 4911 Model name: OASIS
Model category: saturated flow, solute transport
Authors: Newell,	C.J., J.F. Haasbeek, J.P. Hopkins, S.E. Alder-Schaller,
et al.
Current version: 2.0
Release date:	12/89
First released:	1989	IGWMC Check-date: 11/90
Institution of Model Development: Rice Univ., Dept.of Env. Sc. and Eng.
P.O. Box 1892, Houston, Texas 77251
Code Custodian: Bedient, P.B.
Rice Univ., Dept. of Env. Sc. and Eng.
P.O. Box 1892, Houston, TX 77251-1892
Model Developed for: research, general use, education
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Documentation: theory, user's guide, examples, verification
Model Testing: verification, lab. datasets, field datasets
Peer Review: concepts, theory, documentation
Availability: public domain, compiled (Macintosh) version
Computer Requirements: Macintosh, 1 Mb RAM, 10 Mb disk space, HyperCard
Abstract:
OASIS is a graphical decision support system for groundwater contamination
modeling developed for the Macintosh II or SE personal computer using
HyperCard software. OASIS is a collection of computer tools including
extensive computerized documentation, two chemical databases, a
hydrogeologic database derived from a survey of 400 sites across the US
and the DRASTIC aquifer vulnerability index system, a numerical
2-dimensional solute transport and biodegradation model --BIOPLUME II--,
and an analytical solute transport model --ODAST. It includes extensive
graphical pre- and postprocessing for BIOPLUME II. OASIS provides
graphical support to decision makers and technical support personnel.
Remarks:
OASIS uses BIOPLUME II, a two-dimensional numerical solute transport model
developed for the analysis of biodegradation (IGWMC Key # 4900), and
ODAST, an two-dimensional analytical solute transport model {IGWMC Key #
6312). It includes the DRASTIC system, an aquifer vulnerability index
using hydrogeologic settings, developed for EPA by NWWA.
IGWMC Key: 4920 Model name: FLOWPATH
Model category: saturated flow
Authors: Franz, T., and N. Guiguer
Current version: 5.0
Release date: 03/94
First released: 1988	IGWMC Check-date: 06/94
Institution of Model Development: Waterloo Hydrogeologic Software
Bolton, Ontario, Canada
Code Custodian: Franz, T.
Waterloo Hydrogeologic Software
19 McCauley Drive, Bolton, N7E 5R8, Ontario, Canada
Model Developed for:
Documentation:
Model Testing•
Peer Review:
Availability:
Computer Requirements:
general use, education
theory, user's guide, examples, verification
verification, code intercomparison
proprietary, license,- compiled (PC) version
IBM PC/AT (small version), 640 Kb RAM, CGA/EGA/VGA;
Intel 80386 based computer (large version), 4 Mb
RAM, CGA/EGA/VGA, math coprocessor
Abstract:
FLOWPATH is an easy-to-use program for the analysis of two-dimensional
steady- state groundwater flow problems. The program calculates hydraulic
head distributions, groundwater velocities, water balances, pathlines,
travel times, capture zones, and wellhead protection areas in confined,
leaky-confined or unconfined, anisotropic, heterogeneous aquifers.
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Boundary conditions include constant head, constant flux and no flow
boundaries. The model can account for pumping and injection wells,
spatially variable ground-water recharge and evapotranspiration, variable
leakage characteristics of under and overlying aquitards, and interaction
between ground-water and surface-water bodies. Ground-water pathlines and
velocities are calculated using a particle tracking method. The pathlines
can be used either to delineate capture zone, injection zones and wellhead
protection areas, or to simulation advection driven transport of adsorbing
solutes. The finite difference model can handle up to 10,000 nodes in an
irregular grid, over 100 wells, and over 100 zones of different aquifer
properties. The program is a self-contained package where all data input
and output is done via an interactive graphical user interface. This
interface facilitates the display of base maps, grid, head contours,
hydrographs, flowlines, and velocity vectors. The program features
interfaces with other model and graphics packages including AutoCad.
• Remarks:
FLOWPATH is a self-contained package where all data input and output is
done via an interactive graphical user interface. This user friendly
interface makes the design and modification of highly complex models
extremely easy. Model results can be displayed as equipotential and
drawdown contours, velocity vectors, pathlines, and calibration residuals.
Input parameters distribution and any results can be directed to the
screen, printer, plotter or graphics files (DXF, PCX, EPS, or TIFF).
IGWMC Key: 4921 Model name: FLOWCAD
Model category: saturated flow
Authors: Franz, T.
Current version: 2.0
Release date: 1993
First released:
IGWMC Check-date: 06/94
Institution of Model Development: Waterloo Hydrogeologic Software
Bolton, Ontario, Canada
Code Custodian: Franz, T.
Waterloo Hydrogeologic Software
19 McCauley Drive, Bolton, N7E 5R8, Ontario, Canada
Model Developed for: general use, education
Documentation: theory, user's guide, examples, verification
Model Testing: verification
Peer Review:
Availability: proprietary, license; compiled (PC) version
Computer Requirements: IBM PC/AT, 640 Kb RAM, VGA (small version); Intel
803 86 based computer, 4 Mb RAM, VGA
Abstract:
FLOWCAD is a menu-driven two-dimensional horizontal transient ground-water
flow model for calculation of time-variant hydraulic heads and drawdowns
and water balances at any specified time. The finite difference
formulation allows for the simulation of confined, leaky confined and
unconfined flow in heterogeneous and anisotropic aquifers using an
irregularly spaced grid. It handles pumping/recharging wells, spatially
varying recharge and evapotranspiration, variable leakage characteristics
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of under- and overlying aquitards, and interaction between ground-water
and surface water bodies. Boundary conditions include constant head and
specified flux. Well pumping rates can vary freely over time, can be
simulated as a pumping well in one time step, an injection well in another
time step or be shut down at any time. The time domain can be subdivided
into 100 time periods. Each time period can then be subdivided into any
number of time steps. Over 400 monitoring points can be used to record
head or drawdown versus time. FLOWCAD includes extensive, built-in
graphics for postprocessing (head/drawdown contours, velocity vectors, and
pathlines)• The program features interfaces with many other models and
graphic packages including AutoCad.
IGWMC Key: 4922 Model name: FLONET
Model category: saturated flow
Authors: Franz, T.
Current version: 1.0
Release date: 1993
First released;	IGWMC Check-date; 06/94
Institution of Model Development: Waterloo Hydrogeologic Software
Bolton, Ontario, Canada
Code Custodian: Franz, I1.
Waterloo Hydrogeologic Software
19 McCauley Drive, Bolton, N7E 5R8, Ontario, Canada
Model Developed for: general use, education
Documentation: theory, user's guide, examples, verification
Model Testing: verification
Peer Review: concepts, theory
Avallabi1 i ty: proprietary, licsnssj complled (PC} version
Computer Requirements: IBM PC/AT, 640 Kb RAM, VGA (small version); Intel
80386 based computer, 4 Mb RAM, VGA {large version)
Abstract:
FLONET is a two-dimensional cross-sectional steady-state ground water flow
model. It computes potentials, streamlines, and ground-water velocities
in a vertical section through a confined or unconfined aquifer. The model
is based on the dual formulation of potentials and stream functions using
a finite element method. It can handle heterogeneous, anisotropic
conditions. The principal direction of the hydraulic conductivity tensor
can vary in space. The model can account for spatially variable leakage
characteristics of under- and overlying aquitards. For unconfined
aquifers, the model seeks the water-table iteratively. FLONET is a self
contained package where all data input and output is done via an
interactive graphical user interface. This interface facilitates the
display of the grid, head contours, hydrographs, flowlines, and velocity
vectors. The user friendly interface makes the design and modification of
highly complex models extremely easy. The program features interfaces
with many other models and graphics packages including AutoCad.
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IGWMC Key: 4923 Model name: AIRFLOW
Model category: vapor flow/transport
Authors: Franz, T., and N. Guiguer
Current version: 1.0
Release date: 1993
First released:	IGWMC Check-date: 06/94
Institution of Model Development: Waterloo Hydrogeologic Software
Bolton, Ontario, Canada
Code Custodian: Franz, T.
Waterloo Hydrogeologic Software
19 McCauley Drive, Bolton, N7E 5R8, Ontario, Canada
Model Developed for: general use, education
Documentation: theory, user's guide, examples, verification
Model Testing: verification
Peer Review:
Availability: proprietary, license; compiled (PC) version
Computer Requirements; IBM PC/AT, 640 Kb RAM, VGA {small version); Intel
803 86 based computer, 4 Mb RAM, VGA (large version)
Abstract:
AIRFLOW is a 2-D, three-phase, multi-component finite element model for
simulation of soil vapor extraction systems. The model takes into account
a radial-symmetric steady state gas flow towards the extraction well and
transient vapor transport of multiple species in heterogeneous unsaturated
media. It computes vapor pressure, vapor pathlines, and velocities under
steady-state conditions for an ideal, compressible gas in a vertical
section. NAPL can be present in the form of residual, lenses or pools and
be spatially distributed. Mass transfer between NAPL, water and gas can
be controlled by kinetics or equilibrium. Model results can be displayed
as isobar contours, velocity vectors, pathlines, and concentration
contours for each component. X-Y plots can also be produced including
total mass removed in the well vs. time, and breakthrough curves for each
component.
IGWMC Key: 4930 Model name: TARGET-2DH
Model category: saturated flow, solute transport
Authors: Moreno, J.L., M.I. Asgian, S.D. Lympany, P-J. Pralong, et al.
Current version: 4.0
Release date; 10/85
First released: 1984	IGWMC Check-date: 12/90
Institution of Model Development: Dames & Moore, Denver, Colorado
Code Custodian: Moreno, J.L.
Dames & Moore, 1125 17th. Str., #1200, Denver, CO 80202
Model Developed for: general use
Documentation: theory, user's guide, examples, program structure,
verification
Model Testing: verification
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Peer Review:
Availability: proprietary, license; source code {main frame),
compiled {PC) version
Computer requirements: Intel 80386 baaed computer, 4 Mb RAM, CGA, math
coprocessor; compiler for larger versions or other
platforms
Abstract:
TARGET-2DH is one of five models of the TARGET series (Transient Analyzer
of Reacting Groundwater and Effluent Transport). It simulates
two-dimensional, vertically averaged, confined and unconfined transient
groundwater flow and solute transport in a single heterogeneous,
anisotropic aquifer using a hybrid finite difference method. The
transport is based on the solution of the advective-dispersive transport
equation for a single noneonservafcive contaminant with linear equilibrium
adsorption (retardation), The solution method used is based on an
iterative alternating direction implicit method.
IGWMC Key: 4931 Model name: TARGET-2DU
Model category: unsaturated flow, solute transport
Authors: Moreno, J.L,, Asgian, M.I., Lympany, S.D., Pralong, P-J. et al.
Current version: 4.0
Release date: 10/85
First released: 1984	IGWMC Check-date: 12/90
Institution of Model Development: Dames & Moore, Denver, Colorado
Code Custodian: Moreno, J.L.
Dames & Moore, 1125 17th, Str., #1200, Denver, CO 80202
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer requirements:
general use
theory, user's guide, examples, program structure,
verification
verification
proprietary, license; source code (main frame),
compiled (PC) version
Intel 80386 based computer, 4 Mb RAM, VGA, 5 Mb disk
space, math coprocessor; compiler for other platforms
Abstract:
TARGET-2DU is one of five models of the TARGET series (Transient Analyzer
of Reacting Groundwater and Effluent Transport), It simulates
two-dimensional, variably saturated, density coupled, transient
groundwater flow and solute transport using a hybrid finite difference
method. The transport is based on the solution of the
advective-dispersive transport equation for a single non-conservative
contaminant with linear equilibrium adsorption {retardation). The solution
method used is based on an iterative alternating direction implicit method.
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IGWMC Key: 4932 Model name: TARGET-2DM
Model category: saturated flow, solute transport
Authors: Moreno, J.L. , Asgiar., M.I., Lympany, S.D., Pralong, P-J. et al.
Current version
Release date
First released
4.0
10/85
1984
IGWMC Check-date: 12/90
Institution of Model Development: Dames & Moore, Denver, Colorado
Code Custodian: Moreno, J.L.
Dames & Moore, 1125 17th. Str., #1200, Denver, CO 80202
Model Developed for: general use
Documentation: theory, user's guide, examples, program structure,
verification
Model Testing: verification
Peer Review:
Availability: proprietary, license; source code (main frame),
compiled (PC) version
Computer requirements: Intel 80386 based computer, 4 Mb RAM, VGA, 5 Mb disk
space, math coprocessor; compiler for other platforms
Abstract:
TARGET-2DM is one of five models of the TARGET series (Transient Analyzer
of Reacting Groundwater and Effluent Transport). It simulates quasi-three
dimensional, confined and unconfined transient groundwater flow and solute
transport in a multi-layered heterogeneous, anisotropic aquifer/aquitard
system using a hybrid finite difference method. The transport is based on
the solution of the advective-dispersive transport equation for a single
non-conservative contaminant with linear equilibrium adsorption
(retardation). The solution method used is based on an iterative
alternating direction implicit method.
IGWMC Key: 4933 Model name: TARGET-3DS
Model category: saturated flow, solute transport
Authors: Moreno, J.L., Asgian, M.I., Lympany, S.D., Pralong, P-J. et al.
Current version: 4.0
Release date: 10/85
First released: 1984	IGWMC Check-date: 12/92
Institution of Model Development: Dames & Moore, Denver, Colorado
Code Custodian: Moreno, J.L.
Dames & Moore, 1125 17th. Str,, #1200, Denver, CO 80202
Model Developed for: general use
Documentation: theory, user's guide, examples, program structure,
verification
Model Testing: verification
Peer Review:
Availability: proprietary, license; source code (main frame),
compiled (PC) version
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Computer requirements: Intel 80386 based computer, 4 Mb RAM, VGA, 5 Mb disk
space, math coprocessor; compiler for other platforms
Abstract:
TARGET-3DS is one of five models of the TARGET series (Transient Analyzer
of Reacting Groundwater and Effluent Transport). It simulates
three-dimensional, saturated, density-coupled, transient groundwater flow
and solute transport using a hybrid (integrated) finite difference method.
The transport is based on the solution of the advective-dispersive
transport equation for a single non-conservative contaminant with linear
equilibrium adsorption (retardation). The solution method used is based
on an iterative alternating direction implicit method. It includes an
internal routine for selecting backward, forward, or central differencing
schemes, based on the value of the local Peclet number and direction of
flow.
IGWMC Key: 49 34 Model name: TARGET-3DU
Model category: unsaturated flow, solute transport
Authors: Moreno, J.L., Asgian, M.I., Lympany, S.D., Pralong, P-J, et al.
Current version: 4.0
Release date: 10/85
First released: 1984	IGWMC Check-date: 12/90
Institution of Model Development: Dames & Moore, Denver, Colorado
Code Custodian: Moreno, J.L.
Dames & Moore, 1125 17th. Str., #1200, Denver, CO 80202
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer requirements:
general use
theory, user's guide,
verification
verification
examples, program structure,
proprietary
Intel 80386 based computer,
space, math coprocessor
4 Mb RAM, VGA, 5 Mb disk
Abstract:
TARGET-3DU is one of five models of the TARGET series (Transient Analyzer
of Reacting Groundwater and Effluent Transport). It simulates
three-dimensional, variably-saturated, density-coupled, transient
groundwater flow and solute transport using a hybrid finite difference
method. The transport is based on the solution of the advective-dispersive
transport equation for a single non-conservative contaminant with linear
equilibrium adsorption (retardation). The solution method used is based
on an iterative alternating direction implicit method.
IGWMC Key: 4940 Model name: DYNFLOW
Model category: saturated flow
Authors: Riordan, P.J., R.P. Schreiber, and B.M. Harley
Current version:
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Release date: 1992
First released: 1982	IGWMC Check-date: 05/92
Institution of Model Development: Camp Dresser & MeKee Inc.
Cambridge, Mass.
Code Custodian: Harley, B.M.
Camp Dresser & MeKee Inc.
One Cambridge Center, Cambridge, MA 02142
Model Developed for:
Documentation;
Model Testing:
Peer Review:
Availability:
Computer Requirements:
general use
theory, user's guide, examples, verification
verification, field datasets, synth. datasets, code
intercomparison
concepts, theory, coding, accuracy, documentation
proprietary; not distributed
Intel 80386 based computer, 4 Mb RAM, math
coprocessor, VGA; compiler for other platforms
Abstract:
DYNFLOW (DYNamic groundwater FLOW simulation model) is a Galerkin finite
element model for the simulation of transient and steady-state
three-dimensional groundwater flow in multi- layered aquifer systems. The
model handles 2D areal and cross-sectional and fully-3D situations,
induced infiltration from streams, artificial and natural recharge or
discharge, and heterogeneous, anisotropic aquifer hydraulic properties.
It solves both linear (confined) and nonlinear (unconfined) aquifer flow
equations, including the transition in time and/or space from confined to
unconfined. The program has a "rising water" scheme to allow drainage to
local streams if the piezometric head in a phreatic aquifer rises to the
elevation of the stream bed. (see remarks.)
Remarks:
DYNFLOW has the following optional solvers: (1) gauss elimination, (2)
successive overrelaxation with or without preconditioning, and (3)
conjugate gradient with preconditioning.
DYNFLOW is based in part on an earlier code, AQUIFEM-N, which utilized a
hybrid three-dimensional FE/FD solution. AQUIFEM-N was developed by P.J.
Riordian and R.P. Schreiber of CDM, J.L. Wilson of MIT, and B.M. Harley of
Resource Analysis, Inc. AQUIFER-N in turn, was based on a two-dimensional
flow code AQUIFEM-1 developed at MIT by J.L. Wilson and A. Sa Da Costa
(IGWMC key # 2630) .
DYNFLOW and DYNTRACK are part of Camp Dresser $ MeKee's DYN-SYSTEM,
DYN-SYSTEM is an integrated set of ground-water modeling programs used
within the CDM company. Other components of the system are: DYNSWIM: 3-D
sea water intrusion model; DYNAPL: 3-D two-phase (sharp interface) model;
DYNPOTS: 3-D potential flow theory model; DYNCON: 3-D finite element mass
transport model; and DYN- EDM: environmental data manager.
The DYN-SYSTEM includes the following support programs: DYNPLOT; graphics
support program; DYNTEK: utility support; DYNPUMP: pumpage data
assignment; DYNDIGI: digitizing utility. The DYN-SYSTEM has the following
optimization packages: DYNOPT: source loading estimation (runs together
with DYNTRACK); DYNCAL: least squares flow model parameter optimization.
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IGWMC Key: 4941 Model name: DYNTRACK
Model category: solute transport
Authors: Riordan, P.J., D.J. Schroeder, and B.M. Harley
Current version:
1992
1984	IGWMC Check-date: 05/92
Release date
First released
Institution of Model Development: Camp Dresser & McKee Inc.,
Cambridge, Mass.
Code Custodian; Harley, B.M.
Camp Dresser & McKee Inc.
One Cambridge Center, Cambridge, MA 02142
Model Developed for: general use
Documentation: theory, user's guide, examples, program structure,
verification
Model Testing: verification
Peer Review: concepts, theory, coding, documentation
Availability: proprietary; not distributed
Computer Requirements: Intel 80386 based computer, 4 Mb RAM, math
coprocessor, VGA; compiler for other platforms
Abstract:
DYNTRACK is a computer program for simulation of three-dimensional
transport. It uses the heads computed with the companion code DYNPLOW.
DYKTRACK uses the same fxnxte element grxd representation of a^uxfer
geometry, flow field, and stratigraphy used for a particular application
for the DYNFLOW model. DYNTRACK can perform either simple particle
tracking or can model three-dimensional advective dispersive transport of
non-conservative contaminants. The contaminant transport is based on the
random walk method for a statistically significant number of particles,
each particle having an associated weight, decay rate, and retardation
rate. Dispersion is simulated by imparting a random deflection to each
particle in each time step and can be scale-dependent (see remarks).
Remarks
DYNTRACK includes the option to use backtracking for source identification.
See also comments under DYNFLOW.
IGWMC Key: 4950 Model name: DRASTIC
Model category: ranking/screening
Authors: Aller, L., T. Bennett, J.H. Lehr, R.J. Petty, et al.
Current version;
Release date; 4/87
First released: 1987	IGWMC Check-date: 12/90
Institution of Model Development: National Ground Water Association
Dublin, Ohio
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Contact; National Ground. Water Association
6375 Riverside Drive, Dublin, Ohio 43017
Model Developed for: general use, education
Documentation: theory
Model Testing:
Peer Review: concepts, documentation
Availability: public domain, source code
Computer requirements: Macintosh
Abstract:
DRASTIC is a standardized system for evaluating groundwater pollution
potential or aquifer vulnerability using hydrogeologic settings. The
system has two major parts: the designation of mappable units, termed
hydrogeologic settings, and the superposition of a relative rating system
called DRASTIC. Hydrogeologic settings, as found in the USA, are combined
with DRASTIC indexes to create units which can be displayed graphically.
The hydrogeologic factors incorporated in the system include depth to
water, net recharge, aquifer media, soil media, topography, impact of the
vadose zone media, and hydraulic conductivity of the aquifer. DRASTIC can
be considered a screening tool for groundwater management and has been
implemented in various computer environments.
IGWMC Key: 4970 Model name: MT3D (Modular Transport in 3 Dimensions)
Model category: solute transport
Authors: Zheng, C.
Current version: 1.8
Release date: 10/92
First released: 1990	IGWMC Check-date: 07/94
Institution of Model Development: S,S. Papadopulos & Assoc., Inc.
7944 Wisconsin Avenue, Bethesda, MD
20814
Code Custodian: Andrews, C.B.
S.S. Papadopulos & Assoc., Inc.
7944 Wisconsin Ave., Bethesda, MD 20814
Model Developed for; research, general use
Documentation: theory, user's guide, examples, program structure,
verification
Model Testing: benchmarking (analyt, solutions), field testing,
code intercomparison
Peer Review: concepts, mathematical framework, performance,
usability
Availability: early version public domain; new versions
proprietary, compiled only
Computer Requirements: Intel 80386 based computer, DOS 3.0, CGA, 4 Mb RAM,
3 Mb disk space, math coprocessor
Abstract:
MT3D is a three-dimensional solute transport model for simulation of
advection, dispersion, and chemical reactions of dissolved constituents in
ground-water systems. The model uses a modular structure similar to that
implemented in MODFLOW. The modular structure makes it possible to
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independently simulate advection, dispersion, sink/source mixing, and
chemical reactions without reserving computer memory space for unused
options. MT3D uses a mixed Eulerian-Lagrangian approach to solve
the three-dimensional advective-dispersive-reactive equation, in three
basic options: the method of characteristics (MOC), the modified method
of characteristics (MHOC), and a hybrid of these two methods (HMOC). This
approach combines the strength of the MOC for eliminating numerical
dispersion with the computational efficiency of the MMOC. The
availability of both MOC and MMOC options, and their selective use based
on an automatic adaptive procedure under the HMOC option, make MT3D
uniquely suitable for a wide range of field problems. MT3D is
intended for use with any block-centered finite-difference flow model
such as MODFLOW and is based on the assumption that changes in the
concentration field will not measurably affect the flow field. This
allows the user to independently construct and calibrate a flow model.
MT3D retrieves the hydraulic heads and the various flow and source/sink
terms saved by the flow model, automatically incorporating the specified
hydrologic boundary conditions. Although the MT3D documentation describes
the use of MT3D in conjunction with MODFLOW, the transport model can be
linked to any other block-centered finite-difference flow model,
MT3D can be used to simulate changes in concentration of
single-species miscible contaminants in ground-water considering
advection, dispersion, and some simple chemical reactions. The chemical
reactions included in the model are equilibrium-controlled linear or
non-linear sorption and first-order irreversible decay or biodegradation.
Remarks:
MT3D accommodates the following spatial discretization capabilities and
transport boundary conditions: 1) confined, unconfined, or variably
confined/unconfined aquifer layers; 2) inclined model layers and variable
cell thickness within the same layer; 3) specified concentration or mass
flux boundaries; and 4) the solute transport effects of external sources
and sinks, such as wells, drains, rivers, areal recharge, and
evapotranspiration. The program runs in batch mode.
The MT3D code is distributed together with a version of the TJSGS flow
model MODFLOW, including the PCG2 solver.
Processing MODFLOW (PM) is a proprietary, easy-to-use graphic pre- and
postprocessor and run-time shell for MODFLOW, MODPATH, and MT3D developed
by W-H. Chiang and W. Kinzelbach. The module PATHLINE uses the MODPATH
results for display on screen or saving as HPGL or DXF file. ISOLINE
draws contours for heads and drawdowns, FLOW computes the waterbalance for
a subregion of MODFLOW, and PMHT draws curves for heads versus time,
(see IGWMC Key # 8550).
IGWMC Key; 4980 Model name; SEEP/W (PC-SEEP)
Model category: saturated flow, unsaturated flow
Authors: Krahn, J., D.G. Fredlund, L. Lam, and S.L. Barbour
Current version:
Release date; 1992
First released: 1984	IGWMC Check-date: 01/93
Institution of Model Development: Geo-Slope Programming Ltd.
Calgary, Alberta, Canada
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Code Custodian: Krahri, J.
Geo-Slope Programming Ltd., 7927 Silver Springs Road NW,
Calgary, Alberta, Canada T3B 4K4
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
general use
theory, user's guide, examples
proprietary, license; compiled (PC) version
Intel 80386 based computer, DOS 3.0/Windows 3.0,
Mb RAM, VGA, math coprocessor
Abstract:
S1EP/W is an interactive finite element program for simulating
steady-state and transient 2d cross-sectional flow in both the saturated
and unsaturated zones. It can simulate surface infiltration and
evapotranspiration and handle internal drains. SEEP/W is designed to
analyze seepage through earth dams, water table location and fluctuations,
and mounding of the water table underneath a leaking waste pond. The model
computes nodal pore-water pressures, hydraulic heads, velocities, flow
directions and flow gradients. It includes graphic pre- and
postprocessors for problem definition, finite element mesh design, head
contours and velocity vector plots. SEEP/W provides options to use either
an in-core or an out-of-core iterative solver for the nonlinear flow
equations.
Remarks:
SEEP consists of three groups of programs: 1.) Data input simulation
preprocessor PRQMSEEP, 2.) Main processors SEEPSS (steady-state, in-core
solver), SEEPTR (transient and steady-state, in core solver), and SEEPOC
(steady-state, out-of-core solver), and 3.) Post-processors DOT20 (mesh
plots), D0T21 (contour plots), and DOT22 velocity vector plots).
IGWMC Key: 4990 Model name: SENECA
Model category: hydrogeochemical
Authors: Ma, Y.H., and C.W. Shipman
Current version: 2.0
Release date: 1981
First released: 1972	IGWMC Check-date: 12/90
Institution of Model Development: Los Alamos Nat Lab., Los Alamos, NM
Code Custodian: Kerrisk, J.F.
Los Alamos Nat. Laboratory
P.O. Box 1663, Los Alamos, NM 87545
Model Developed for:
Documentation;
Model Testing:
Peer Review:
Availability:
Computer Requirements:
general use
theory, user's guide, examples, verification
lab. datasets
concepts, theory
public domain, source code
compiler
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Abstract
SENECA computes equilibrium compositions in a two-step process. The first
step uses the free-energy minimalization procedure to obtain an approximate
composition of the system. The second step uses this approximate
composition as an initial estimate for solving a set of mass-balance and.
mass-action equations by the Newton-Raphson method. Version 2 includes a
permanent arrangement for an aqueous phase, a gas phase, and multiple
solid phases; an activity coefficient calculation for aqueous species;
oxidation-reduction reactions; and a thermodynamic data base for 70
complexes, gases and solids.
Remarks:
Results from four chemical-equilibrium computer programs, REDEQL.EPA,
GEGCHEM, WATEQF, and SENECA2, have been compared with experimental
solubility data for some simple systems of interest with geothermal
brines: Kerrisk, J.F. 1981. Chemical Equilibrium Calculations for
Aqueous Geothermal Brines. LA-8851-MS, Los Alamos Scientific Lab., Los
Alamos, New Mexico.
IGWMC Key; 5000 Model name: MICROFEM
Model category: saturated flow
Authors: Hemker,
Current version
Release date
First released
C. J. ,
2.40
04/94
1987
and H. van Elburg
IGWMC Check-date: 07/94
Institution of Model Development: Elandsgracht 83, 1016 TR Amsterdam, The
Netherlands
Code Custodian: Hemker, C.J.
Elandsgracht 83, 1016 TR Amsterdam, The Netherlands
Model Developed for: general use, education
Documentation: theory, user's guide, examples, program structure,
verification
Model Testing: verification
Peer Review:
Availability:	proprietary, purchase; compiled (PC) version
Computer Requirements:	IBM PC/AT, DOS 2.1, 640 Kb RAM, math coprocessor, CGA
Abstract:
MICROFEM is a user-friendly series of programs to create and analyze a
wide range of multi-layer steady-state and transient groundwater flow
problems using the finite element technique. The program handles multiple
time-varying sources and sinks, as well as spatially and temporally
varying boundary conditions. The model supports heterogeneous aquifers
and aquitards as well as anisotropy. It consists of various modules for
generation of a mesh, model setup, input preparation and editing, equation
solving, postprocessing, graphical interpretation and plotting. Confined,
semi-confined, phreatic, stratified and leaky multiple aquifer systems can
be simulated with a maximum of 16 aquifers. The maximum number of nodes
in the PC version is 4000, which in the extended memory version the
program handles up to 12,500 nodes. Data manipulation and grid design and
editing is supported by a highly interactive graphic interface.
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Sophisticated grid generators are included. The program comes standard
with FernGrid generator for irregular boundaries. For complex grids
requiring gradually changing node-spacing to accomplish high contrasts in
spacing between different parts of the model, the optional FemMesh grid
generator is available. The standard version of MicroFem supports
steady-state simulations. Post-processing includes the display of contour
lines for heads and velocity vectors. The standard version includes the
module FenCalc for computation of heads and internal and external fluxes,
FeMerge to merge existing models with new grids, and FemPlot for plotting
map views. Optional modules support transient flow calculations complete
with display of time series of heads for selected nodes (FemCat), a
three-dimensional particle tracking program for display of individual
flowlines or a series of evenly distributed flow line (F3Model) in two or
three dimensions. MicroFem includes extensive, integrated pre- and
postprocessing capabilities supported by a highly user-interactive graphic
interface. It includes printing/plotting and screen display of finite
element mesh, head contours, horizontal and vertical flow components,
water balances of selected parts of the model, flow vectors, and flowlines.
IGWMC Key: 5001 Model name: FLOWNET
Model category: saturated flow
Authors: Van Elburg, H., C.J. Hemker, and G.B. Engelen
Current version: 5.12
Release date: 10/91
First released: 1987	IGWMC Check-date: 04/94
Institution of Model Development:
Free Univ., Inst. of Earth Sc., Dept.
of Hydrogeology & Geograph. Hydrology
P.O. Box 7161, 1007MC Amsterdam, The
Netherlands.
Code Custodian: Hemker, C.J.
Elandsgracht 83, 1016 TR Amsterdam, The Netherlands
Model Developed for: general use, education
Documentation: theory, user's guide, examples, verification
Model Testing: verification
Peer Review:
Availability: proprietary, purchase; compiled (PC) version
Computer Requirements: IBM PC/AT, DOS 2.0, 256 Kb RAM, CGA/EGA/VGA
Abstract:
FLOWNET is used for interactive modeling of two-dimensional steady-state
flow in a rectangular, cross - sectional representation of a heterogeneous,
anisotropic aquifer. It generates a flow net, composed of flowlines and
equipotential lines, obtained by a five-point finite difference
approximation to calculate heads and linear interpolation to determine
equipotential lines. The matrix equation is solved using the conjugate
gradient method. The streamlines are determined from the flow function
which in turn is determined using the adjoint function of the potential
function. The model handles no-flow and constant hydraulic head boundary
conditions, variable along the boundary. It has options for waterbalance
calculations, display of isochrones, and HP-plotter output.
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Remarks:
The 3rd edition of the textbook Applied Hydrogeology by C.w. Fetter
(Mcmillan Publishing Company, 1994) contains a diskette with student
versions of the programs FLOWNET, QUICKFLOW, and AQTESOLV. These versions
are fully operational, but limited in capability.
IGWMC Key: 5002 Model name; MATE (Microcomputer Aquifer Test
Evaluation)
Model category: aquifer test analysis
Authors: Hemker, C.J,
Current version: 1.05
Release' date: 10/85
First released:	1985	IGWMC Check-date: 06/91
Institution of Model Development: Free Univ., Inst, of Earth Sc., Dept.
of Hydrogeology & Geograph. Hydrology
P.O. Box 7161, 1007MC Amsterdam, The
Netherlands.
Code Custodian: Hemker, C.J.
Elandsgracht 83, 1016 TR Amsterdam, The Netherlands
Model Developed for: general use, education
Documentation: theory, user's guide, examples, procrax structure,
code listing
Model Testing:
Peer Review: concepts, theory
Availability: proprietary, purchase; compiled (PC) version
Computer requirements: IBM PC/AT, DOS 2.0, 256 Kb RAM, CGA
Abstract:
MATE is menu-driven, user-interactive program to evaluate aquifer
parameters (T, S, c, s'} from pumping test data using the least-squares
approach together with the Malquardt algorithm. The program can handle
four types of aquifer parameter evaluations including: 1) steady-state
flow in semi-confined aquifers (De Glee); 2) unsteady-state flow in
(semi-)confined aquifers (Theis or Hantush well function); 3) recovery
test in (semi-)confined aquifers (Theis or Hantush well function); and
steady-state flow in multiple aquifer systems (Hemker).
IGWMC Key: 5004 Model name: MFLOP (FLOw Pattern)
Model category: saturated flow
Authors: Hemker,	C.J.
Current version: 2.03
Release date:	09/92
First released: IGWMC Check-date: 04/94
Institution of Model Development: Free Univ., Inst, of Earth Sc., Dept.
of Hydrogeology & Geograph. Hydrology
P.O. Box 7161, 1007MC Amsterdam, The
Netherlands.
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Code Custodian: Hemker, C.J.
Elandsgracht B3, 1016 TR Amsterdam, The Netherlands
Model Developed for: general use, education
Documentation:
Model Testing:
Peer Review:
Availability: proprietary, purchase? compiled (PC) version
Computer requirements: IBM PC/AT, DOS 2.0, 256 Kb RAM, CGA/EGA
Abstract:
MFLOP is a simple microcomputer program for the immediate generation of
streamlines of well fields with superimposed uniform flow under confined
conditions.
IGWMC Key: 5010 Model name: SIMGRO
Model category: saturated flow, unsaturated flow, ground-/surface-water
hydraulics
Authors: Querner, E.P.
Current version:
Release date: 11/87
First released: 1987	IGWMC Check-date: 12/90
Institution of Model Development: Inst, for Land & Water Management
Research (ICW), Wageningen, The
Netherlands
Code Custodian: Querner, E.P.
Inst, for Land and Water Management Research (ICW)
P.O. Box 35, 6700 AA Wageningen, The Netherlands
Model Developed for:	general use
Documentation:	theory, user's guide, examples
Model Testing:
Peer Review:
Availability:	proprietary, purchase; source code
Computer requirements:	compiler
Abstract:
SIMGRO (SIMulation of GROundwater flow and surface water levels) simulates
flow in the saturated zone, the unsaturated zone, and a surface water
system. The saturated zone model consists of a quasi -threedimensional
finite element model with an implicit calculation scheme. The unsaturated
zone is modeled by means of two reservoirs, one for the root zone and one
for the subsoil. The root zone is treated using a water balance model and
includes storage and resulting change in phreatic level, capillary rise,
percolation and evapotranspiration. The surface water system,
representing a network of small channels, is considered as a single
reservoir with criteria for water supply, discharge, water level control,
and extraction for sprinkling.
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IGWMC Key: 5018 Model names AQUA
Model category: saturated flow, solute transport, heat transport
Authors: Kjaran,	S.P., D. Egilson, and S.Th. Sigurdson
Current version: 4.0
Release date;	10/91
First released:	1988	IGWMC Check-date: 12/92
Institution of Model Development: Vatnaskil Consulting Engineers
Arrauli 11, IS-108 Reykjavik, Iceland
Code Custodian: Kjaran, S.P.
Vatnaskil Consulting Engineers. Ltd.
Armuli 11, IS-108 Reykjavik, Iceland
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
verification
general use, education
theory, user's guide, examples
verification
concepts, theory, documentation
proprietary, purchase; compiled (PC) version
IBM PC/AT (small version), DOS 2.1, 640 Kb RAM
EGA/VGA, math coprocessor, HALO 88 graphics? Intel
80386 Kaoof^ r* Ai-m-sn fay ( 1 a yrtaf- trarcr A \ A WH
JJTX f 1.1 Id I— XX vujb< X.	im> C9WJU f X UlUW WW	i.	V*- 0 { XIX 1
based computer (larger version), 4 Mb RAM,
VGA
Abstract:
AQUA is a program package developed for solving steady-state and transient
two-dimensional ground-water flow and transport problems using the finite
element method. The model can be applied to either confined or unconfined
aquifers allowing for heterogeneity and anisotropy of aquifer hydraulic
parameters and time-varying infiltration and pumping. Processes included
in the simulation of transport of heat and dissolved chemicals are
convection, decay, adsorption and velocity dependent dispersion. For heat
transport conduction is included. The AQUA package includes various
graphic pre- and post processors facilitating interactive grid design and
data entry for areal and cross-sectional problems.
IGWMC Key: 5020 Model name: FASTEP/WELLCOST
Model category: aquifer test analysis, management/optimization
Authors: Ulrick, J.
Current version:
Release date:
First released;	IGWMC Check-date: 02/91
Institution of Model Development: Ulrick & Associates
1400 Grandview Drive, Berkeley, CA 94705
Code Custodian; Ulrick, J.
Ulrick & Associates, Inc.
1400 Grand View Drive, Berkeley, CA 94705-1634
Model Developed for: general use
Documentation: theory, user's guide, examples
Model Testing:
Peer Review:
Availability; proprietary, purchase; compiled (PC) version
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Computer requirements: IBM PC/AT, 512 Kb RAM, CGA
Abstract:
FASTEP (Step-Drawdown Test Analysis) determines the formation loss, well
loss, and exponential well loss coefficients from step-drawdown data.
WELLCOST (Analysis of Costs of Well) computes the optimum discharge,
horsepower and capital maintenance and pumping cost (annual and per
acre-foot) of a new well using electricity, diesel, natural gas, or
gasoline as an energy source.
IGWMC Key: 5022 Model name: 3D FINITE ELEMENT DUAL POROSITY FLOW AND
TRANSPORT MODEL
Model category: saturated flow, solute transport, porous medium, fractures
Authors: Glover, K.C.
Current version:
Release date: 1987
First released: 1987
IGWMC Check-date: 06/92
Institution of Model Development: U.S. Geological Survey, Water Resources
Div., Cheyenne, Wyoming
Code Custodian: U.S. Geological Survey, Water Resources Div.
P.O. Box 1125, Cheyenne, WY 82003
Model Developed for: general use
Documentation: theory, user's guide, examples, code listing
Model Testing: verification
Peer Review: concepts, theory
Availability: public domain, source code
Computer requirements: compiler
Abstract:
This model simulates three-dimensional groundwater flow and
advective-dispersive solute transport in oil shale and associated
hydrogeologic units. The model treats oil shale as a dual porosity medium
by simulating flow and transport in parallel fractures separated by a
matrix (blocks) of high porosity, low permeability material using the
upstream finite element method. Diffusion of the solute between fractures
and the essentially static water of the shale matrix is simulated
including a closed-form solution that acts as a source-sink term to the
differential equation of solute transport. The resulting equations are
solved using a Gauss elimination scheme.
IGWMC Key: 5024 Model name: PATHRA1
Model category: multimedia exposure model
Authors: Fjeld, R.A., A.W.	Elzerman, T.J. Overcamp, N. Giannopoulos, et al.
Current version:
Release date: 10/86
First released: 1985	IGWMC Check-date: 10/90
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Institution of Model Development: Clemson Univ., Dept. of Environm.
Systems Eng., Clemson, South Carolina
Code Custodian: Fjeld, R.
Clemson Univ., Dept. of Environm. Systems Eng.
Clemson, SC 29634-0919
Model Developed for: research, general use
Documentation: theory, user's guide, examples, program structure,
code listing, verification
Model Testing: verification
Peer Review: concepts, theory
Availability: public domain, source code, compiled (PC) version
Computer Requirements: IBM PC/AT, 640 Kb RAM, CGA, math coprocessor!
compiler for other platforms
Abstract:
PATHRAE is a computer code for assessing human health risk associated with
low level radioactive waste disposal at municipal dumps and sanitary
landfills. The code contains algorithms for analyzing ten different
pathways including the subsurface transport of contaminants to a stream
and migration to a well. The risk assessment procedure consists of: 1)
specification of the source term, 2) analysis of environmental transport,
and 3} estxmatxon of the rxsk of health effects* Contamxnant transport xn
the unsaturated zone is approximated by assuming plug flow resulting in a
retarded contaminant entry in the saturated zone. Transport in the
saturated zone is modeled as an analytical solution to the
advective-dispersive transport equation including radioactive decay.
Remarks;
Code verification is discussed in Fjeld et A1. (1986) and Looney et Al.
(1987a) (see references). Quality assurance related to PATHRAE are
discussed in Looney et AL. (1987b).
The VERIFY code (version Sept. 26, 1986; written in WATCOM Fortran for IBM
PC) implements the basic algorithms used in the PATHRAE code to calculate
the subsurface transport of contaminant sites. PATHRAE (as implemented in
WATFIV for IBM 3081) is the full implementation; 1st release: Sept 2,
1985; updates; Nov 1985, Dec 1985, and Jan 1986.
IGWMC Key: 5025 Model name: NEFTRAN/NEFTRAN-S
Model category: saturated flow, solute transport, stochastic simulation,
fracture networks
Authors: Campbell, J.E., C.D. Leigh, D.E. Longsine, E.J., Bonano, and C.P.
Harlan
Current version:
Release date: 1990
First released: 1987	IGWMC Check-date: 10/92
Institution of Model Development: Sandia Nat. Lab,, Fluid Mech. & Heat
Transfer Div., Albuquerque, New Mexico
Code Custodian: Campbell, J.E.
Sandia Nat. Laboratories, Safety and Reliability Analysis
Div., Albuquerque, NM 87185
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Model Developed for;	research, general use
Documentation:	theory, user's guide, examples, program structure,
verification
Model Testing:	verification
Peer Review;	concepts, theory, documentation
Availability:	public domain, source code
Computer Requirements:	compiler
Abstract:
NEFTRAN (NEtwork Flow and TRANsport) is a discrete finite difference model
for groundwater flow and radionuclide transport in high-level radioactive
waste repositories in deep saturated and fractured basalt formations- It
handles a generalized flow network, matrix diffusion, leg transfer, itiixmg
cell and multiple radionuclide decay chains. The underlying assumption is
that all significant flow and radionuclide transport take place along
one-dimensional discrete "legs' or paths. These legs are assembled into a
multi-dimensional network, A particle tracking model is used to define
the trajectory a particle follows from a given point until it crosses a
boundary. The resulting information is used to construct the network and
define the boundary conditions. Solving for solute transport requires
velocities provided by the flow simulator. Solute transport includes
advection, radioactive decay/production and equilibrium sorption.
Remarks:
NEFTRAN is based on the models NWFT (Campbell et A1. 1979; see
references), NWFT/DVM, a single porosity network model based on the
distributed velocity method DVM (Campbell et A1. 1980; Campbell et Al.
1981; see references), and GENNET.
IGWMC Key: 5028 Model name: GTC (Group Transfer Concentration)
Model category: solute transport
Authors: Yu, C., W.A. Jester, and A.R. Jarrett
Current version:
1985
19 84	IGWMC Check-date: 10/90
Release date
First released
Institution of Model Development: Argonne National Laboratory
9700 S. Cass Avenue, Argonne, IL 60439
Code Custodian: Yu, C.
Argonne National Laboratory
9700 S. Cass Avenue, Argonne, IL 60439
Model Developed for: research, general use
Documentation: theory
Model Testing:
Peer Review:
Availability:	restricted non-proprietary, source code
Computer requirements:	compiler
Abstract:
GTC is a general purpose finite difference solute transport model
developed to simulate solute movement in both homogeneous and
non"homogeneous media. It splits up the modeled area in zones of constant
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properties, including dispersion coefficient, retardation factor, and
degradation rate. Mass transfer between the solid phase and the liquid
phase is proportional to the concentration gradient. The GTC model can be
used for both saturated and unsaturated conditions. It covers the
conventional advection-dispersion model, the mobile-immobile pore model,
the nonequilibrium adsorption-desorption model and the jointed porous rock
model.
IGWMC Key: 5030 Model name: NUSEEP
Model category; saturated flow
Authors:
Current version:
Release date:	1990
First released:	199 0	IGWMC Check-date: 04/91
Institution of Model Development: Northwestern University, Dept. of Civil
Eng., Evanston, Illinois
Code Custodian: Code custodian
Northwestern University, Dept. of Civi1 Eng.
2145 Sheridan Road, Evanston, IL 60208
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer requirements:
Abstract:
research, general use, education
theory, user's guide, examples
proprietary, license; compiled (PC) version
IBM PC/AT, 640 Kb RAM, math coprocessor, PLQT88
included, EGA
NUSEEP is a collection of four IBM-PC compatible programs designed to
solve steady-state groundwater flow problems in two dimensions using the
boundary element method. The software computes piezoroetric head and
boundary fluxes. The soil is presumed non-deformable, homogeneous and
saturated. The solution of a groundwater flow problem begins with the
construction of a boundary mesh and the specification of boundary
conditions (boundary flux if heads are to be calculated, or heads if
boundary flux is unknown). The software includes graphics post processing
to create piezometric head contours and boundary configuration.
IGWMC Key: 5033 Model name: FOWL (FOssil fuel combustion Waste
Leaching)
Model category: hydrogeochemical
Authors: Hostetler, C.J., R.L. Erikson, and M.L. Keitmer
Current version: 2.0
Release date: 10/93
First released: 1988	IGWMC Check-date: 06/94
Institution of Model Development: Battelle Pacific Northwest
Laboratories, Environm. Sciences Div.
P.O. Box 999, Richland, WA 99352
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Code Custodian: Electric Power Software Center
Electric Power Research Inst.
P.O. Box 10412, Palo Alto, CA 94303-9743
Model Developed for: general use
Documentation: theory, user's guide, examples, program structure,
verification
verification
concepts, theory, documentation
Model Testing:
Peer Review;
Availability: proprietary, license; compiled (PC) version
Computer Requirements: IBM PC/AT, DOS 2.1, 640 Kb RAM, math coprocessor, CGA
Abstract:
The FOWL computer code allows the user to calculate the chemical
composition, quantity, and release duration of leachates of fossil fuel
combustion byproducts disposed of in ponds and landfills. The aqueous
concentrations of Al, Ba, Ca, Cr, Mo, S, Si, and Sr are calculated using
mechanistic thermochemieal data. Concentrations of As, B, Cd, Cu, Fe, Mg,
Na, Ni, Se, and Zn are calculated as a function of Ph. The basis of FOWL
is formed by precipitation-dissolution reactions at equilibrium with a
given solid phase and solubility relationships based on laboratory and
field data. The model assumes that these solid phases do not change
rapidly and that thermodynamic equilibrium applies throughout the leaching
time period. The FOWL code uses geochemical and water balance methods to
calculate leachate composition and quantity over time. The model output
provides the source term for subsequent transport and fate modeling.
Remarks:
The geochemical database built into FOWL-GH is derived from extensive
field and laboratory testing. Using this EPRI database, utilities can
model leachate composition at ash sites without performing laboratory
leachate extractions.
Version 2.0 of FOWL incorporates a geochemical equilibrium model (GMIN) to
perform the geochemical calculations for the aqueous and solid phases. It
also incorporates the Hydrologic Evaluation of Landfill Performance (HELP)
model (IGWMC Key # 4800) to make the water balance calculations. It has
the ability to consider impoundments as well as landfill sites. The
geochemical module includes a thermodynamic database and an empirical data
base.
IGWMC Key: 5039 Model name: SESOIL (Seasonal Soil Compartment Model)
Model category: unsaturated flow, solute transport, surface runoff,
sediment transport
Authors: Bonazountas, M., and J. Wagner (recent version: D, Hetrick)
Current version: 1.6
Release date: 1987
First released: 1984	IGWMC Check-date: 06/92
Institution of Model Development: Arthur D. Little
262 Beacon Str., Boston, MA 02116
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Code Custodian: David Hetrick, Oak Ridge National Lab.,
Oak Ridge, TN {DOS version)
General Sciences Corporation/SAIC, Maryland
(Windows version)
Model Developed for: research, general use
Documentation: theory, user's guide, examples, program structure,
code listing, verification
Model Testing: verification, lab. datasets, field datasets, code
intercomparison
Peer Review: concepts, theory
Availability: public domain, source code, compiled (PC) version
(see also remarks)
Computer Requirements: IBM PC/AT (small version), 640 Kb RAM, 3 Mb disk
space, CGA, math coprocessor; Intel 80386 based
computer (Windows version) , 4 Mb RAM, VGA;
compiler for other platforms
Abstract:
SESOIL is a user-friendly finite-difference soil compartment model
designed for long-term hydrologic, sediment, and pollutant fate
simulations. The model distinguishes three major components, the
hydrological cycle, the sediment cycle and pollutant transport and fate.
Elements of the hydrologic cycle included are rainfall, soil moisture
variations, infiltration, exfiltration, surface runoff,
evapotranspiration, and groundwater runoff; simulation of the sediment
cycle include sediment washload from storms and sediment resuspension due
to wind; the pollutant fate cycle simulated takes into account advection,
diffusion, volatilization, adsorption and desorption, chemical degradation
or decay, biological transformations, hydrolysis, complexation, and ion
exchange.
Remarks:
The comprehensive evaluation of SESOIL by Watson and Brown (1985)
uncovered numerous deficiencies in the original version of the model. The
SESOIL code has been extensively modified at Oak Ridge National Laboratory
to address these problems and to enhance its capabilities. This modified
version is incorporated in the Graphical Exposure Modeling System
developed for EPA/OTS (GEMS; see Kinerson and Hall, 1986). The updated
version (June 1987) is also available from EPA/OTS and described in
Hetrick et al (1989; see references). It is also included in RISKPRO
(see IGWMC Key 7950).
SESOIL has undergone testing by a variety of organizations. These efforts
have included ssnsitivity analysis, comparison with other models, and
limited comparison with field data (Bonazountas et Al, 1982; Wagner et
Al., 1983; Hetrick, 1984; Hetrick et Al. , 1982, 1986; Bicknell et Al.,
1984; Kincaid et Al., 1984; Watson and Brown, 1985; Donigian and Rao,
1986; and Hetrick et Al. 1988a, 1988b; see references).
Support for SESOIL may be obtained (at cost) from: David Hetrick, 8417
Mecklenburg Court, Knoxville, TN 37923, phone: (615) 531-2077.
SESOIL was incorporated as the soil/land component of the screening level
multimedia model, TOX-SCREEN (Hetrick and McDonald-Boyer, 1984), developed
by Oak Ridge National Laboratory, Oak Ridge, Tennessee for EPA's Office of
Toxic Substances.
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IGWMC Key; 5040 Model name: GWAP (Graphical Well Analysis Package)
Model category: aquifer test analysis
Authors: Dansby,	D.A.
Current version;	2.2
Release date;	12/89
First released:	1988	IGWMC Check-date: 02/91
Institution of Model Development: Groundwater Graphics
5209 Windmill Str., Oceanside, CA 92056
Code Custodian: Dansby, D.A.
Groundwater Graphics, 5209 Windmill Str.,
Oceanside, CA 92506
general use
theory, user's guide, examples
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability: proprietary, purchase; compiled
Computer requirements: IBM PC/AT, DOS 2.0, 512 Kb RAM,
(PC) version
CGA/EGA/VGA
Abstract:
GWAP is a well test analysis package that provides a computer-based method
of performing graphical curve matching. Data from the well test are
plotted on the computer screen and then a type curve is selected,
overlain, and matched to the data directly on the screen. GWAP supports
confined-leaky aquifer (Hantush, 1955), unconfined aquifer (Neuman, 1975),
large diameter well (Papadopulos and Cooper, 1967), and slug
injection/withdrawal (Cooper et al., 1967) type curves.
IGWMC Key: 5060 Model name: PTDPS I
Model category: aquifer test analysis
Authors: Blair, A.W.
Current version:
Release date:
First released:	IGWMC Check-date: 01/91
Institution of Model Development: IRRISCO
University Park, New Mexico
Code Custodian: Blair, A.W.
IRRISCO, P.O. Box 5011, University Park, NM 88003-5011
Model Developed for: general use
Documentation:	theory, user's guide, examples
Model Testing:
Peer Review:
Availability:	proprietary, license; compiled (PC) version
Computer requirements:	IBM PC/AT, 256 Kb RAM, CGA
Abstract:
PTDPS I is a pumping test data plotting software for use with confined
aquifers. It performs the following functions; (1) Cooper/Jacob confined
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aquifer trend, drawdown, and recovery' graphs; Thiem test-distance/drawdown
analysis and trend and drawdown graphs; (3) Theis equation match point
method trend and drawdown graphs; (4) step drawdown test trend and step
drawdown graphs; (5) well and formation losses; (6) transmissivity and
storage coefficient calculations; and (7) least squares or manual
interactive graphic curve fitting.
IGWMC Key: 5061 Model name: PTDPS II
Model category; aquifer test analysis
Authors; Blair, A.W,
Current version:
Release date:
First released:	IGWMC Check-date: 02/91
Institution of Model Development: IRRISCO
University Park, New Mexico
Code Custodian: Blair, A.W.
IRRISCO, P.O. Box 5011, University Park, KM 88003-5011
Model Developed for: general use
Documentation: theory, user's guide, examples
Model Testing:
Peer Review;
Availability: proprietary, license; compiled (PC) version
Computer requirements: IBM PC/AT, 256 Kb RAM, CGA
Abstract:
PTDPS II is a pumping test data plotting software for use with
unconfined/leaky aquifers with the following functions: (1) Cooper/Jacob
unconfined aquifer trend, drawdown graphs; Hvorslev slug (falling head)
and bail (rising head) piezometer tests; (3) Hantush/Jacob leaky aquifer
match point method trend and drawdown graphs; (4) transmissivity and
storage coefficient calculated using least squares or manual interactive
graphic curve fitting.
IGWMC Key: 5062 Model name: PTDPS III
Model category: aquifer test analysis
Authors: Blair, A.W.
Current version:
Release date:
First released:	IGWMC Check-date: 02/91
Institution of Model Development: IRRISCO
University Park, New Mexico
Code Custodian: Blair, A.W.
IRRISCO, P.O. Box 5011, University Park, NM 88003-5011
Model Developed for: general use
Documentation: theory, user's guide, examples, code listing
Model Testing:
Peer Review:
Availability: proprietary, license; compiled (PC) version
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Computer requirements: IBM PC/AT, 256 Kb RAM, CGA/EGA
Abstract:
PTDPS III is a pumping test data plotting software for confined, leaky
confined and unconfined aquifers. For confined aquifers the software
performs the following functions: (1) Cooper/Jacob semilog method; Theis
well function match point method; and (3) Thiem distance/drawdown method,
with unconfined aquifers the program handles the Cooper/Jacob semilog
method. With leaky confined aquifers the program includes the
Hantush/Jacob method. The program also performs: (1) step drawdown
well/formation loss method; Hvorslev's bail test method and slug test
method; and (3) Bouwer and Rice piezometer functions.
IGWMC Key: 5070 Model name: PUMPING TEST PROGRAM
Model category: aquifer test analysis
Authors: Hall, P.
Current version:
Release date: 1991
First released:	IGWMC Check-date: 03/91
Institution of Model Development: Earthware of California
Laguna Niguel, Calif.
Code Custodian: Phil Hall
Earthware of California
30100 Town Center Drive, #196, Laguna Niguel, CA 92677
Model Developed for: general use
Documentation: user's guide, examples
Model Testing:
Peer Review:
Availability: proprietary, purchase; compiled (PC) version
Computer requirements: IBM PC/AT, DOS 3.3, 640 Kb RAM, CGA/EGA/VGA
Abstract:
This is a pumping test program package for analysis of drawdown and
recovery tests using the straight line method or least - squares fit.
Hydrographs and site plans can be plotted and step tests analyzed. The
programs will take the data from manual input or data loggers and will
correct them for partial penetration or water table conditions. The
aquifer coefficients can be calculated using straight line or least
squares fit. It is possible to use only part of the graph for analysis.
IGWMC Key: 5080 Model name: PUMP
Model category: aquifer test analysis
Authors: Ulrick, J.
Current version:
Release date:
First released:	IGWMC Check-date: 03/91
Institution of Model Development: Ulrick & Associates
1400 Grandview Drive, Berkeley, CA 94705
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Code Custodian: Ulrick, J,
Ulrick & Associates, Inc.
1400 Grand View Drive, Berkeley, CA 94705-1634
Model Developed for; general use
Documentation: user's guide, examples
Model Testing:
Peer Review:
Availability: proprietary, purchase; compiled (PC) version
Computer requirements: IBM PC/AT, 640 Kb, CGA/EGA/VGA
Abstract:
The Theis method pumping test analysis program PUMP matches a Theis curve
to selected aquifer drawdown and recovery test data by Gauss-Newton
non-linear regression. For a pumping well, corrections may be made for
casing storage, water-table conditions, and well loss. The program is
menu, driven and has full screen editing capabilities. Various options
are available for graphic display and plotting of the results.
IGWMC Key: 5090 Model name: WHIP {Well Hydraulics Interpretation
Program)
Model category: aquifer test analysis
Authors:
Current version:
Release date; 1992
First released:	IGWMC Check-date: 06/93
Institution of Model Development: Hydro Geo Chem Inc.
Tuscon, Arizona
Code Custodian: Walter, G.
Hydro Geo Chem Inc., 1430 N. 6th Avenue, Tuscon, AZ 85705
Model Developed for: general use
Documentation: user's guide, examples
Model Testing:
Peer Review:
Availability:	proprietary, purchase; compiled (PC) version
Computer requirements:	IBM PC/AT, 512 Kb RAM, math coprocessor, EGA/VGA
Abstract:
WHIP is a menu driven interactive program for the design and interpretation
of complex aquifer tests and has extensive tabular and graphic output
options. The program handles simulation of pumping histories and analysis
of aquifer tests (including Jacob-Cooper analysis of late time drawdown
data and Theis-recovery) with multiple pumping wells and time-varying
pumping rates. Analysis options included: time variable pump rate
drawdown/recovery tests, multiple pump well drawdown/recovery tests, slug
or bailer tests with interference wells, pressure pulse tests, and step
drawdown tests. It handles confined (Theis) and water table (Dupuit
correction) conditions, and leaky aquifer, double porosity aquifer, and
vertically anisotropic leaky aquifer conditions. Automatic curve-fitting
is performed using the Gauss-Marquardt search algorithm. WHIP computes
confidence intervals for each estimated parameter.
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IGWMC Key: 5100 Model name: PTMODEL
Model category: saturated flow
Authors: Hall, P.
Current version: 7.01
Release date: 1994
First released:	IGWMC Check-date: 03/91
Institution of Model Development: Earthware of California
Laguna Niguel, Calif.
Code Custodian: Phil Hall
Earthware of California
30100 Town Center Drive, #196, Laguna Niguel, CA 92677
Model Developed for:	general use
Documentation:	user's guide, examples
Model Testing:
Peer Review:
Availability:	proprietary, purchase; compiled (PC) version
Computer requirements:	IBM PC/AT, DOS 3.3, 640 Kb RAM, CGA/EGA/VGA
Abstract:
The modular program PTMODEL is a series of forward analytical solutions
and pumptest programs for confined, unconfined, and leaky aquifers.
Pumptest options include drawdown, recovery, combined drawdown/recovery,
and step-drawdown tests. The forwards model computes drawdowns due to the
pumping or injection of multiple wells. The software includes various
graphing options, such as linear, semi-log, and log-log for time-drawdown
curves, 2D contours and 3D surface plots, and linear drawdown profiles.
PTMODEL is part of the GEOBASE program.
IGWMC Key: 5120 Model name: FEMSEEP
Model category: saturated flow, solute transport
Authors: Meiri, D.
Current version: 3.0
Release date: 1994
First released: 1985	IGWMC Check-date: 01/93
Institution of Model Development: Ebasco Environmental
111 N. Canal Street, Chicago, IL 60606
Code Custodian: Dr. D. Meiri
FEMSEEP Software
3942 West Estes Ave., Lincolnwood, IL 60645
Model Developed for: general use
Documentation: theory, user's guide, examples, verification
Model Testing: verification
Peer Review:
Availability: proprietary, purchase; compiled (PC) version
Computer Requirements: Intel 803 66 based computer, math coprocessor, 4 Mb
RAM, VGA, plotter/printer
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Abstract:
FEMSEE? is a 2-D finite element flow and solute transport model, combined
with particle tracking for solving steady state and transient planar and
cross - sectional groundwater flow in heterogeneous, anisotropic aquifers.
The aquifer can be under confined, unconfined or leaky confined
conditions. The flow model can be solved in terms of hydraulic head,
drawdown, or stream function. Flow b.c.'s may include prescribed head,
prescribed flux, or mixed head-flux. The Petrov-Galerkin finite element
solute transport model accounts for advection, dispersion, and
retardation. The Petrov-Galerkin method reduces oscillatory behavior in
advection-dominated transport. Transport b.c.'s may have prescribed
concentrations or mass flux. FEMSEEP supports a movable grid for
cross-sectional phreatic surface simulation and includes a preprocessor
for grid design and data preparation and a graphic postprocessor. FEMSEEP
uses dynamic dimensioning. Problem size is dependent on computer RAM.
IGWMC Key: 5130 Model name: FINITE
Model category; saturated flow
Authors:
Current version
Release date
First released
IGWMC Check-date: 03/91
Institution of Model Development; Koch and Associates
Ellicot City, Maryland
Code Custodian: Koch, D.H.
Koch & Associates
2291 Greenway Drive, Ellicot City, KD 21043
Model Developed for: general use
Documentation: user's guide, examples
Model Testing:
Peer Review:
Availability:	proprietary, purchase; compiled {PC} version
Computer requirements:	IBM PC/AT, 640 Kb RAM, CGA
Abstract:
FINITE is a program for simulation of the inflow to mines, dewatering
trenches, and the impact of excavations on groundwater levels. The
program is based on the steady state solution for flow to a finite length
line sink in an infinite homogeneous confined or unconfined aquifer. The
solution used was developed by Muskat. The program extends the Muskat
algorithm to transient problems using the method of successive states.
Both constant head or constant flow sources or sinks may be simulated.
This program permits the user to simulate the inflow up to 40 finite line
sinks or sources.
IGWMC Key: 5140 Model name: GLOVER
Model category: saturated flow
Authors: Spinks, M.P.
Current version;
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Release date:
First released:	IGWMC Check-date: 03/91
Institution of Model Development: Island Design
New Hartford, CT 06057
Code Custodian: Spinks, M.P.
Microcode, Inc.
12136 Calle Zagal N3, Albuquerque, NM 87111
Model Developed for: general use
Documentation: user's guide, examples
Model Testing:
Peer Review:
Availability: proprietary, purchase; compiled (PC, Macintosh)
version
Computer requirements: IBM PC/AT, DOS 3.0, 640 Kb RAM, CGA; Macintosh
Abstract:
GLOVER is an analytical model based on the Glover-Balmer equation for
simulation of the depletion from or accretion to surface water due to
pumping or recharging wells. The model is valid for a homogeneous,
isotropic, two dimensional aquifer. Boundary conditions are either
constant-head (e.g. fully penetrating rivers) or no-flux (e.g. impermeable
boundary). The software provides various graphic input/output options.
IGWMC Key: 5150 Model name; HYDROPAL
Model category: saturated flow, solute transport
Authors:
Current version:
Release date:
First released:	IGWMC Check-date: 03/91
Institution of Model Development: Watershed Research Inc.
White Bear lake, Minn.
Code Custodian: Watershed Research Inc.
4779 126 st N., White Bear Lake, MN 55110
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer requirements:
general use
theory, user's guide, examples
proprietary, purchase; compiled
IBM PC/AT, DOS 3.0, 640 Kb RAM,
(PC)
CGA
version
Abstract:
HYDROPAL is an interactive, menu-driven set of analytical and numerical
solutions of groundwater flow and contaminant transport problems. The
numerical models are adaptations of the PLASM and RANDOM WALK models. The
models are described in W.C. Walton's book "Practical Aspects of Ground
Water Modeling". The program creates ASCII output for postprocessing
in a graphical package.
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IGWMC Key: 5160 Model name: INTERSAT
Model category: saturated flow
Authors: Voorhees, M.
Current version: 5.0
Release date: 1994
First released:	IGWMC Check-date: 06/94
Institution of Model Development: ESE/Hydrosoft Inc.
Sarasota, FL 34240
Code Custodian: Voorhees, M.
ESE/HydrosofInc.
63 Sarasota Center Boulevard, #107, Sarasota, FL 34240
Model Developed for: general use
Documentation: user's guide, examples, verification
Model Testing: verification, code intercomparison
Peer Review:
Availability: proprietary, purchase; compiled (PC) version
Computer Requirements: IBM PC/AT, DOS 3.0, 640 Kb RAM (small version), CGA;
Intel 803B6 Idss ed computer, 4 Mb RAM (large
version), VGA
Abstract:
INTERSAT is an interactive finite difference model for transient, one,
two- and three dimensional and axisymmetric simulation of ground water
flow in complex aquifers systems and complex boundaries. The program
includes extensive graphic pre- and postprocessing as well as contour
graphics. It has optional SIP and ADI solvers, calculates water budgets,
and computes velocity distributions for use in a solute transport model.
IGWMC Key: 5161 Model name: INTERTRANS
Model category: solute transport
Authors: Voorhees, M.
Current version:
Release date
First released
IGWMC Check-date: 01/93
Institution of Model Development: ESE/Hydrosoft Inc.
Sarasota, FL 34240
Code Custodian: Voorhees, M.
ESE/Hydrosoft, Inc.
63 Sarasota Center Boulevard, #107, Sarasota, FL 34240
Model Developed for: general use
Documentation: user's guide, examples
Model Testing:
Peer Review:
Availability:
Computer requirements:
proprietary, license; compiled (PC) version
IBM PC/AT, 640 Kb RAM, CGA (small version); Intel
80386 based computer, 4 Mb RAM (large version), VGA,
math coprocessor
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Abstract:
INTERTRANS is an interactive three-dimensional solute transport model for
calculation of travel times, pathlines and concentration distribution in
heterogeneous, anisotropic groundwater systems. The transport model is
based on the random-walk method, incorporating three-dimensional
scale-dependent dispersion. The model includes an option for
three-dimensional reverse pathline tracking. It requires a known flow
field, either measured, generated with the model INTERSAT by the same
author, or by MODFLOW. INTERTRANS includes on-line plan view and
cross-sectional mapping and contouring of results, and real time particle
movement.
IGWMC Key: 5171 Model name: THEIS
Model category: saturated flow
Authors: Spinks, M.P.
Current version:
Release date:
First released:	IGWMC Check-date: 03/91
Institution of Model Development: Microcode, Inc.
Albuquerque, New Mexico
Code Custodian: Spinks, M.P.
Microcode, Inc.
12136 Calle Zagal NE, Albuquerque, NM 87111
Model Developed for: general use
Documentation: user's guide, examples
Model Testing:
Peer Review:
Availability: proprietary, license; compiled (PC, Macintosh)
version
Computer requirements: IBM PC/AT, 640 Kb RAM, CGA; Macintosh
Abstract:
THEIS 3.s an analytical aquifer simulation model based on the Theis
equation. It simulates potentiometric surface drawdown or buildup effects
due to pumping or injecting wells in a homogeneous, isotropic, two
dimensional aquifer. Boundary conditions are either constant head or
no-flux. THEIS allows well withdrawal or injection schedules to be
independent of each other and also independent of the intervals at which
calculated output is desired. The user can specify the grid for areal
calculation of potentiometric surface changes.
IGWMC Key: 5175 Model name: POLLUT
Model category: solute transport
Authors:
Current version:
Release date:
First released:	IGWMC Check-date: 03/91
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Institution of Model Development: Koch and Associates
Ellicot City, Maryland
Code Custodian: Koch, D.H.
Koch & Associates
2291 Greenway Drive, Ellicot City, MD 21043
Model Developed for: general use
Documentation: user's guide, examples
Model Testing:
Peer Review:
Availability:	proprietary, purchase; compiled (PC) version
Computer requirements:	IBM PC/AT, 640 Kb BAM, CGA
Abstract:
POLLUT is an analytical model for two-dimensional simulation of a
contaminant plume using the Wilson and Miller equation of 1978. The
program computes the concentration at any point in space due to the
continuous release of a solute at a point in an aquifer. The program
includes the effects of advection (one dimension), dispersion (two
dimensions), decay and linear adsorption. Up to 100 different continuous
sources may be simulated using superposition for time-varying sources.
IGWMC Key: 5176 Model name: STREAMLINE
Model category: saturated flow
Authors .*
Current version:
Release date:
First released:	IGWMC Check-date: 03/91
Institution of Model Development: Koch and Associates
Ellicot City, Maryland
Code Custodian; Koch, D.H.
Koch £ Associates
2291 Greenway Drive, Ellicot City, MD 21043
Model Developed for: general use
Documentation: user's guide, examples
Model Testing:
Peer Review:
Availability: proprietary, license; compiled (PC) version
Computer requirements: IBM PC/AT, 640 Kb RAM, CGA, SURFER, THEIS2
Abstract:
This program computes and plots groundwater flow streamlines in a
homogeneous, isotropic, and confined aquifer under influence of pumping
wells and a uniform regional gradient. Travel times along a streamline or
pathline may also be computed. The input comes from THEIS2 software.
IGWMC Key: 5180 Model name: MOFAT
Model category: multiphase flow, vapor transport, solute transport
Authors: Kaluarachchi, J.J, and J.C. Parker
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Current version: 2 . 0
Release date: 1990
First released: 1988
IGWMC Check-date: 10/92
Institution of Model Development: Environmental Systems & Technologies,
Inc., Blacksburg, Virginia
Code Custodian: Parker, J.C.
Environmental Systems & Technologies, Inc.
2608 Sheffield Drive, Blacksburg, VA 24060-6326
Model Developed for: research, general use
Documentation: theory, user's guide, examples, verification
Model Testing: verification, lab. datasets
Peer Review: concepts, theory
Availability; proprietary, license; compiled (PC) version
Computer Requirements: Intel 80386 based computer, DOS 3.3, 4 Mb RAM,
math-coprocessor, CGA/EGA/VGA
Abstract:
MOFAT is an upstream-weighted finite element model to simulate coupled
flow of water, nonaqueous phase liquid (NAPL) and air, and multicomponent
transport of up to five non-inert species in a two-dimensional vertical
section through saturated and unsaturated zones in Cartesian or radial
coordinates. The flow module can be used to simulate 2- or 3-phase system
with gas phase treated dynamically or assumed at constant pressure,
Convective-dispersive transport in water, NAPL and gas phase is analyzed
assuming local equilibrium partitioning among phases and with the solid
phase. MOFAT comes with pre- and post-processing capabilities. Only
rectangular elements with sides parallel to the principle flow axes are
permitted.
Remarks:
To run MOFAT the following data is required: mesh geometry, boundary
condition parameters, simulation control parameters, initial distribution
of heads, porosity, van Genuchten's n, van Genuchten's alpha, residual
water saturation, scaling parameter for air-NAPL interfacial tension,
NAPL-water interfacial tension, ratio of NAPL to water density, ratio of
NAPL to water viscosity, maximum NAPL residual saturation, saturated
hydraulic conductivity, dispersivity, and equilibrium coefficients for
NAPL/water, air/water, and soil/water.
Other required input for MOFAT includes first-order decay coefficients for
each species in water, NAPL, air, and soil phases; diffusion constants in
water, NAPL and air; and liquid density of the pure species.
All flow simulations in MOFAT can be performed using either van Genuchten
or Brooks-Corey soil properties. The program is dimensioned to handle
1500 nodes with 10 different material properties, 50 type-1 boundary nodes
and 100 flux-type boundary elements, and 25 boundary condition cycles with
4 subcycles per cycle. A maximum of two seepage faces are allowed with a
maximum of 50 nodes along any seepage face for a given phase.
IGWMC Key; 5181 Model name: SPILLVOL
Model category: multiphase flow
Authors: Parker, J.C., and R.J. Lenhard
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Current version: 3.0
Release date: 1990
First released: 1989	IGWMC Check-date: 01/93
Institution of Model Development; Environmental Systems & Technologies,
Inc., Blacksburg, Virginia
Code Custodian: Parker, J.C.
Environmental Systems & Technologies, Inc.
2608 Sheffield Drive, Blacksburg, VA 24060-6326
Model Developed for: general use, education
Documentation: theory, user's guide, examples
Model Testing:
Peer Review: concepts, theory
Availability: proprietary, license; compiled (PC) version
Computer Requirements: IBM PC/AT, 64 0 Kb RAM, 5 Mb disk space, math
coprocessor, CGA/EGA/VGA
Abstract:
SPILLVOL is an interactive menu-driven program to estimate areal
hydrocarbon distributions and integrated volumes from well fluid level
data. The program can be used to determine: 1) current volume of "free"
hydrocarbon in the soil; 2) the current residual product volume associated
with historical fluid level variations; and 3) the volume of hydrocarbon
which can be recovered by skimming either without water pumping or for a
specified final water table configuration. Calculations are based on a
physically-based model for vertical equilibrium three phase fluid
distributions which includes effects of oil entrapment in the saturated
zone and nondrainable residual oil in the unsaturated zone (see also
remarks). (see also SPILLCAD)
Remarks:
Soil properties are described in SPILLVOL using the van Genuchten
capillary pressure model, the parameters of which may be estimated by the
program from grain size distribution data. The user also supplies data
from a network of observation wells on current depth to oil and depth to
water, historical minimum depth to oil and maximum depth to water, and
anticipated future water table elevations. Furthermore, the program gives
information on areal distribution of uncertainty in volume estimates due
to uncertainty in soil properties, fluid properties and interpolation
error.
IGWMC Key: 5182 Model name: VENTING
Model category: vapor flow/transport
Authors: Kemblowski, M.W., J.L. Zhu, and J.C. Parker
Current version: 3.0
Release date: 1993
First released: 1989	IGWMC Check-date: 07/94
Institution of Model Development: Utah State Univ., Civil & Env. Eng.
Dept., Logan, Utah 84322-4110
Code Custodian: Parker, J.C.
Environmental Systems & Technologies, Inc.
2608 Sheffield Drive, Blacksburg, VA 24060-6326
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Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
research, general use, education
theory, user's guide, examples
concepts, theory
proprietary, license; compiled (PC, Macintosh)
version
Computer Requirements: IBM PC/AT, 640 Kb RAM, 4 Mb disk space, math
coprocessor, C6A/EGA; Macintosh
Abstract:
VBNTING is an interactive program to estimate hydrocarbon recovery from
the unsaturated zone by vacuum extraction. The total volumetric gas flow
rate may be input directly for single or multi-well systems or may be
estimated from the gas permeability and applied well vacuum assuming
radial flow to a given well. Gas permeability can be estimated by the
program from a field test in which well bore vacuum and flow rates are
measured. The model predicts recovery of residual hydrocarbon during
steady gas flow at .a specified temperature. Partitioning from the
residual organic liquid to air, water, and adsorbed phases, which may
consist of up to 200 components, is computed from equilibrium
thermodynamic relations and a venting efficiency factor that accounts for
deviations from equilibrium. The efficiency factor may be estimated by
the program using a boundary layer model or specified by the user from
pilot test data. Data input includes vapor pressure at 20 °C, boiling
point and molecular weight of each component and initial mass fractions
are input. The required composition files may be edited from a library
file which contains properties for more that 50 compounds commonly found
in petroleum fuels. Compositions files for typical fresh and weathered
gasoline are supplied. VENTING utilizes a finite difference solution to
compute total recovery and component recovery versus time as well as the
composition of the remaining fluid. The program also enables evaluation
of varying spxll compositions, temperature, and gas pumping rate on
hydrocarbon recovery. VENTING is menu-driven with full screen editing
capabilities and pop-up help screens. This user interface provides
interactive data input and a user-expandable library with properties of
over 50 common hydrocarbons. In-screen viewing and hardcopy graphs of
total soil hydrocarbons and component mass vs. time are also supported.
Remarks:
In order to compute hydrocarbon recovery, the volumetric gas flow rate
must be known. If the flow rates are not known, VENTING can estimate it
from the well pressure and gas permeability for the case of radial gas
flow to a single well penetrating the vadose zone. Air permeability value
may be input directly, or computed from a steady-state gas pumping test.
The program performs a mass balance calculation for each chemical compound
at discrete time steps.
Input requirements: air flow rate, spill quantity, venting period,
temperature, spill composition (from a library file), contaminated soil
volume, organic carbon content, volumetric water content, air-filled
porosity, venting efficiency factor, minimum and maximum time step, and
time weighting factor. ' The output of VENTING includes: total hydrocarbon
mass versus time, component of mass remaining in soil, gas phase
concentration of component in well bore, equilibrium gas phase
concentration, and total soil concentration of component.
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IGWMC Key: 5183 Model name; SOILPROP
Model category! parameter ID unsaturated flow
Authors: Mishra,	s. , J.C, Parker, and N, Sir.ghal
Current version: 2.1
Release date: 1991
First released:	1988	IGWMC Check-date: 01/93
Institution of Model Development: Environmental Systems & Technologies,
Inc., Blacksburg, Virginia
Code Custodian: Parker, J.C.
Environmental Systems & Technologies, Inc.
2608 Sheffield Drive, Blacksburg, VA 24060-6326
Model Developed for: research, general use, education
Documentation: theory, user's guide, examples, verification
Model Testing: verification
Peer Review: concepts, theory
Availability: proprietary, license; compiled (PC) version
Computer Requirements: IBM PC/AT, 640 Kb RAM, math coprocessor, CGA/EGA/VGA
Abstract:
SOILPROP is an interactive program to estimate soil hydraulic properties
and their uncertainty from particle size distribution data. Properties
estimated by the program are the saturated hydraulic conductivity and
parameters in the van Genuchten and Brooks-Corey models which describe the
relationship between soil water content, capillary pressure and relative
permeability. SOILPROP is based on the premise that the soil-water
retention function reflects a pore size distribution which in turn can be
inferred from the grain size distribution. The Arya-Paris procedure is
used to compute theoretical water content versus capillary pressure curve,
which is then fitted to the two models. Options are available to estimate
soil parameters for vertical flow models such as MOTRANS or unsaturated
flow codes, "quasi - static" parameters for use in vertical equilibrium
models such as ARMOS. Saturated hydraulic conductivity is estimated from
the user-specified porosity and grain size distribution data using a
Kozeny-Carman type equation. The uncertainty in saturated hydraulic
conductivity and VG and BC model parameters is determined by SOILPROP
using first-order error analysis methods based on results of calibration
studies with a large data set. The information on parameter uncertainty
can be used m conjunction with sensitivity analyses to assess the
accuracy of field predictions based on SOILPROP parameters. Methods for
this analysis are presented in the program documentation. SOILPROP is
menu driven with full-screen editing capabilities and pop-up help screens.
Data input requirements include particle size distribution data and soil
porosity or bulk density. PSD data may be given in USDA, ASTM, or
user-defined classifications. The program provides options for graphical
display of observed and fitted results of the soil-water characteristic
function.
Remarks:
The saturated hydraulic conductivity in SOILPROP is estimated from the
user-specified porosity and grain-size distribution data using a
Kozeny-Carmen type equation.
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IGWMC Key: 5184 Model
name: ARMOS (Areal Multiphase Organic Simulator)
Model category: multiphase
flow
Authors: Kaluarachchi, J.J.
, J.C. Parker, J.L, Zhu, and A.K. Katyal
Current version: 5.0

Release date: 1994

First released: 1988
IGWMC Check-date: 07/94
Institution of Model Development; Environmental Systems & Technologies,
Inc., Blacksburg, Virginia
Code Custodian: Parker, J.C.
Environmental Systems & Technologies, inc.
2608 Sheffield Drive, Blacksburg, VA 24060-6326
Model Developed for: research, general use, education
Documentation: theory, user's guide, examples, verification
Model Testing: lab. datasets, code intercomparison
Peer Review: concepts, theory
Availability: proprietary, license; compiled (PC) version
Computer Requirements: Intel 80386 based computer, DOS 3.3, 4 Mb RAM, math
coprocessor, CGA/EGA/VGA, Microsoft Windows
Abstract:
ARMOS is a numerical multiphase flow model for analyzing free phase
hydrocarbon migration and recovery system design. It simulates areal flow
of water and separate phase light hydrocarbon in unconfined aquifers under
natural gradients or forced gradients associated with well or trench free
product recovery systems. ARMOS can be used to assess and optimize the
design of control and remediation systems. It predicts hydrocarbon
thickness in soil or observation wells at arbitrary locations as well as
hydrocarbon and water flow rates and total recovery at pumping wells.
ARMOS 5.0 uses an efficient finite element solution using an unbanded
iterative solver. It considers residual hydrocarbon in the saturated and
unsaturated zones associated with water imbibition and oil drainage.
Properties are based on van Genuchten model with hysteresis due to
residual oil. In addition to the usual data needed for saturated flow
models, data requirements include basic physical properties of the
hydrocarbon and soil capillary pressure relations. The program includes
an estimator for soil and fluid properties. Anisotropic and heterogeneous
soil properties are considered and recharge may vary spatially. ARMOS
includes menu-driven pre and post-processing programs. The user interface
provides interactive data file generation; simplified stipulation of
boundary conditions and well operating conditions; a graphical database
management system; and a user-transparent interface for moving data to and
from other program and CAD (DXF format) base maps. The program will
produce custom graphic output on a base map; plots of water and
hydrocarbon pumping rates or cumulative recovery versus time at well;
contour plots of fluid levels or hydrocarbon thickness at monitoring
wells; and on-screen viewing or hardcopy of graphical and tabular output.
Remarks:
ARMOS is based on vertical integration of the governing flow equations
under the assumption of near-equilibrium conditions in the vertical
direction with zero gas pressure gradients. The new version uses a serial
solution procedure for water and oil flow equations. Other new options
include simulation of hydrocarbon flow only assuming steady-state water
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flow, or to model water flow only to facilitate calibration.
Initial conditions m ARMOS air© specified by giving fluid level data from
a set of observation wells that are interpolated internally to define
nodal air-oil and oil-water elevations. Boundary conditions can be
stipulated as prescribed fluid table elevations or fluid fluxes. Multiple
recovery wells for free product skimming with or without water pumping may
be modeled.
Input data for ARMOS include initial conditions prescribed as elevations
of air-oil and oil-water fluid tables, prescribed boundary conditions,
soil properties, fluid properties and run-time parameters such as mesh
data, time increments and convergence criteria. Fluid properties required
by ARMOS are viscosity, density and surface tension of the hydrocarbon.
Soil properties include the saturated hydraulic conductivity and
parameters defining the saturation-capillary pressure-relative
permeability relations. Soil properties can vary spatially.
The main output from ARMOS are predicted fluid table elevations and the
total, free and residual oil volume per unit area. For recovery well
locations, water and oil pumping rates, cumulative recovery water and
hydrocarbon pumpage and well fluid levels are output. For each output
time, the cumulative change in oil volume, area of soil with free oil
present and area of soil with residual or free oil present are given.
The ARMOS model, together with MOFAT and SOILPROP, is documented in
Environm. Systems & Technologies, 1988 (see ref.). ARMOS has been
verified using two hypothetical problems involving comparison of the
vertically integrated model with vertical slice simulations for plane
symmetric and axisymmetric scenarios.
IGWMC Key: 5185 Model name: MOTRANS
Model category: multiphase flow, solute transport, vapor flow/transport
Authors: Katyal, A.K., and J.C. Parker
Current version: 1.21
Release date: 1993
First released:	IGWMC Check-date: 07/94
Institution of Model Development: Environmental Systems & Technologies,
Inc., Blacksburg, Virginia
Code Custodian; Parker, J.C.
Environmental Systems & Technologies, Inc.
2608 Sheffield Drive, Blacksburg, VA 24060-6326
Model Developed for: research, general use
Documentation: user's guide, examples
Model Testing:
Peer Review:
Availability: proprietary, license; compiled (PC) version
Computer Requirements: IBM PC/AT, 640 Kb RAM, CGA, math coprocessor
Abstract:
MOTRANS is a finite element model to simulate the flow of water, dense or
light nonaqueous phase liquid (LNAPL) and air, and transport of up to five
partitionable species in two-dimensional vertical sections through
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saturated and unsaturated zones in Cartesian or radial coordinates. Gas
phase flow may be considered explicity or assumed to be as constant
pressure. The code solves flow equatxons at each node only for phases
that are undergoing changes in pressure and saturations above specified
tolerances using a new "adaptive solution domain™ method. NAPL flow
equations are thus locally eliminated if NAPL is absent or exists at a
residual saturation. Convective-dispersive transport in water, NAPL and
gas phases are analyzed assuming local equilibrium partitioning among the
fluid phases and with the solid phase or optionally using a first-order
non-equilibrium mass transfer model. Interphase mass transfer and
compositional dependence of phase densities are considered. MOTRANS
utilizes a three-phase van Genuchten model for
saturation-pressure-permeability relations and considers hysteresis in
oil permeability due to oil entrapment. It has options for simulating
water flow only, oil flow with steady-state water, coupled oil-water flow,
or coupled air-oil-water flow. The MOTRANS user interface includes
menu-driven pre- and post-processing programs. It allows simplified data
file generation; graphical input of spatially variable properties and
time-dependent boundary conditions; a user-transparent interface to
GRAPHER/SURFER for custom graphic output? plots of cumulative mass in
system versus time; contour plots of phase saturations and species
concentrations.
Remarks;
The flow module of MOTRANS can be used to analyze two-phase flow of water
and NAPL in a system with gas present but at constant pressure, or
explicit three-phase flow of water, NAPL and gas at variable pressure.
Systems with no NAPL present or with immobile NAPL at a residual
saturation may also be modeled. The transport module can handle up-to
five components that partition among water, NAPL, gas and solid phases
assuming either local equilibrium interphase mass transfer or first-order
kinetically controlled mass transfer.
MOTRANS calculates pressure heads, saturations and velocities for each
phase at every node for specified output intervals. In addition, the
total volume of mass of each phase, time-step size and number of
iterations are given. For transport analysis, the phase concentrations at
each node are computed. The program has a restart option.
MOTRANS requires specification of parameters defining the air-water
capillary retention function, NAPL surface tension and interfacial tension
with water, NAPL viscosity, NAPL density, maximum residual NAPL saturation
and soil hydraulic conductivity. The latter may be anisotropic and soil
properties may vary spatially. For transport analyses, additional data
input include porous media dispersivities, initial water phase
concentrations, equilibrium partition coefficients, component densities,
diffusion coefficients, and first-order decay coefficients.
Additional transport input data for MOTRANS: mass transfer coefficients
{for nonequilibrium analyses) and boundary condition data. Time dependent
boundary conditions for the flow analysis may involve user-specified phase
heads at nodes or phase fluxes along a boundary segment with zero flux as
the default condition. For transport analysis, time-dependent boundary
conditions include equilibrium water phase concentrations or prescribed
fluxes defined in terms of a specified concentration in the influent
liquid. If not specified, the b.c. is a zero dispersive flux.
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IGWMC Key: 5186 Model name: NITRO
Model category: unsaturated flow, solute transport
Authors: Kaluarachchi, J.J., and J.C. Parker
Current version:
Release date:
First released:	IGWMC Check-date; 10/92
Institution of Model Development: Environmental Systems & Technologies,
Inc., Blacksburg, Virginia
Code Custodian: Parker, J.C.
Environmental Systems & Technologies, Inc.
2606 Sheffield Drive, Blacksburg, VA 24060-6326
Model Developed for:
Documentation z
Model Testing:
Peer Review:
Availability:
Computer requirements:
research, general use
user's guide, examples
proprietary, license; compiled (PC) version
IBM PC/AT, 640 Kb RAM, CGA, math coprocessor
Abstract:
NITRO is a 2-dimensional vertical section or radially symmetric finite
element program for simulation of steady-state and transient uncoupled
flow and transport in the unsaturated zone. The nonlinearity is handled
by Picard iteration. Soil hydraulic properties are described by the
Brooks-Corey or van Genuchten model with hysteresis. The model handles
transport of up to two species with linear or Freundlieh equilibrium
adsorption and zero and first order transformations. It facilitates
atmospheric and seepage boundaries as well as first-type and second-type
(flux) boundary conditions.
IGWMC Key: 5187 Model name: FLOPIT
Model category: parameter ID unsaturated flow/solute transport
Authors: Kool, J.B., S. Mishra, and J.C. Parker
Current version: 1.0
Release date: 1988
First released:	IGWMC Check-date: 10/92
Institution of Model Development: Environmental Systems & Technologies,
Inc., Blacksburg, Virginia
Code Custodian: Parker, J.C.
Environmental Systems 6 Technologies, Inc.
2608 Sheffield Drive, Blacksburg, VA 24060-6326
Model Developed for: research, general use
Documentation: user's guide
Model Testing:
Peer Review:
Availability:	proprietary, license; compiled (PC) version
Computer requirements:	IBM PC/AT, 640 Kb RAM, CGA, math coprocessor
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Abstract:
FLOFIT is a program to estimate unsaturated soil hydraulic properties
and/or transport parameters from 1-dimensional vertical flow/transport
experiments. Three modes of operation are possible: 1} flow properties
may be estimated from transient flow data; 2) solute dispersion and linear
adsorption parameters may be estimated from steady flow transport data; or
3) flow and transport parameters may be estimated simultaneously from
transient unsaturated flow and tracer experiments. Hydraulic properties
are described by a hysteric van Genuchten model and dispersion by a
scale-dependent function. Hydraulic and/or transport parameters may
differ between layers. Numerical inversion of governing equations is
performed using an efflcient Levensberg-Marquardt algorithm.
IGWMC Key; 5188 Model name; VADSAT
Model category; saturated flow, unsaturated flow, solute transport,
stochastic simulation
Authors: Parker,	J.C.
Current version; 1.0
Release date:	1992
First released;	1992	IGWMC Check-date: 10/92
Institution of Model Development; Environmental Systems & Technologies,
Inc., Blacksburg, Virginia
Code Custodian: Parker, J.C.
Environmental Systems & Technologies, Inc.
2S08 Sheffield Drive, Blacksburg, VA 24060-6326
Model Developed for:
Do cumen tation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
Abstract:
general use
theory, user's guide, examples, verification
verification
concepts, theory
proprietary, license; compiled (PC) version
Intel 80386 based computer, 2 Mb RAM, 4 Mb disk
space, math coprocessor, VGA
VADSAT is an interactive program to simulate the movement of inorganic
species from a contaminated region in the unsaturated zone to a receptor
in the saturated zone. Contaminants considered include organic species in
a separate phase which migrate by convective-dispersive transport in the
aqueous phase with adsorption and biodecay and which volatilize and
diffuse in the gas phase. Depletion of a finite source mass with time is
taken into consideration. VADSAT is based on analytical solutions of the
unsaturated and saturated zone flow and transport equations with
appropriate initial and boundary conditions. It can estimate peak
concentrations and arrival times at the water-table and at downgradient
receptors. The model can run in either the stochastic (MC) or
deterministic mode.
Remarks:
VADSAT consists of three modules: 1) a source model which considers the
release of contaminant from a waste zone, or zone of residual
contamination in the case of spill scenarios, to underlying soil; 2) an
unsaturated or vadose zone model which considers the transport of
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contaminants vertically through the unsaturated zone (1-D) to the
water-table; and 3) a saturated zone model which considers
three-dimensional transport of dissolved contaminants in groundwater. The
three submodels are linked and executed rapidly to perform error analysis
via a Monte Carlo method.
IGWMC Key: 5189 Model name: SPILLCAD
Model category: multiphase flow
Authors:
Current version: 3.1
Release date: 1993
First released:
IGWMC Check-date: 07/94
Institution of Model Development: Environmental Systems & Technologies,
Inc., Blacksburg, Virginia
Code Custodian: Parker, J.C.
Environmental Systems & Technologies, Inc.
2608 Sheffield Drive, Blacksburg, VA 24060-6326
Model Developed for: research, general use, education
Documentation: theory, user's guide, examples
Model Testing:
Peer Review: concepts, theory
Availability: proprietary, license; compiled (PC) version
Computer Requirements: Intel 80386 based computer, DOS 3,1, 2 Mb RAM, math
coprocessor, VGA
Abstract:
SPILLCAD is a program for hydrocarbon spill site assessment and remedial
design evaluation. The heart of SPILLCAD is a graphical database that
enables monitoring well and soil boring data to be posted or contoured on
site maps at any scale. Time series and other X-Y graphs may be used to
evaluate trends and relationships among measurements. The analytical
power of the program derives from a set of modules integrated with the
database that enable quantitative assessment of spill volume and
contaminated soil volume, free product and dissolved plume migration, and
design alternative for plume control and recovery. The program can used
to estimate free product volume and soil product thickness from monitoring
well fluid level data and soil sampling data and has practical methods for
estimating soil and determining soil and fluid properties built into the
program. These capabilities make it possible to estimate volumes of soil
with concentrations {TPH, BTEX, etc.) above a threshold, estimate total
mass of a given species from soil concentration data, and estimate
residual hydrocarbon volume from soil TPH data. The program also has the
ability to perform capture zone analysis and estimate recoverable product
from recovery wells. These capabilities make it possible to: compute
water and oil streamlines for steady-state water pumping and/or recharge;
determine well placement and operation for control of free product or
dissolved plumes,* and estimate asymptotic recoverable and residual product
for different recovery systems. SPILLCAD includes menu driven pre- and
post-processing program. The user interface provides the ability to
import CAD (DXF-format) base maps as well as data from spreadsheet
programs. The graphical database system has the ability to store and
retrieve fluid level, dissolved concentration and soil boring data; and
perform relational database queries for user-defined search criteria. The
program will produce custom graphic output on a base map; overlays of
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sample locations, data values, contours, and gradient plots. The program
can also produce time series plots of well hydrographs, dissolved
concentrations, water and hydrocarbon pumping rates; and cumulative
recovery versus time at wells.
Remarks:
Procedures developed for estimation of hydrocarbon spill volume include
interpolation and spatial integration of TPH measurements from soil cores,
and spatial integration of hydrocarbon volume per area computed from
monitoring well fluid levels. The first method involves vertical
integration of TPH measurements to yield oil volume per unit area followed
by kriging and areal integration to estimate the volume within the
measurement zone. This method is especially well suited to determine the
volume of residual product in the unsaturated zone.
The second method involves kriging of well fluid levels, calculation of
free oil volume per area using a physically-based model for hydrostatic
three-phase fluid distributions, followed by areal integration to estimate
the volume of free product floating on the water table. An analytical
procedure was developed to evaluate effects of steady-state water pumping
from multiple point sources on the oil flow gradients to enable hydraulic
control of plume spreading. Estimates of residual oil in the unsaturated
and saturated zone are made from the hysteric three-phase capillary
pressure - saturation relations and from initial oil thickness distributions
and computed water table drawdown, which enable determination of the
recoverable spill volume for alternative well configurations.
The PC implementation of SPILLCAD operates within a graphical windowed
environment. It is highly interactive and includes a graphical data base
system for management of spatial data.
IGWMC Key: 5190 Model name: PUMPING TEST PACKAGE
Model category: aquifer test analysis
Authors:
Current version:
Release date:
First released:	IGWMC Check-date: 03/91
Institution of Model Development: Rockware, Inc.
Wheatridge, Colorado
Code Custodian: Bidle Reed, H.
Rockware, Inc.
4251 Kipling Street, #595, Wheatridge, CO 80033
Model Developed for:	general use
Documentation:	user's guide, examples
Model Testing:
Peer Review:
Availability:	proprietary, license; compiled (PC) version
Computer requirements:	IBM PC/AT, 640 Kb RAM, CGA/EGA/VGA
Abstract;
The PUMPING TEST PACKAGE of Rockware, Inc. calculates optimal values of
aquifer parameters as transmissivity, storage coefficient, leakage
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coefficient, and hydraulic resistance from pumping test data as observed
on one or more wells (up to 10 wells). The menu-driven program uses a
non-linear regression technique and provides for error checking in input.
IGWMC Key: 5200 Model name: FLOWNS
Model category: saturated flow
Authors: Bramlett, W., and R.C. Borden
Current version:
Release date:
First released: 1989	IGWMC Check-date: 03/91
Institution of Model Development: North Carolina State Univ., civil Eng.
Dept., Rayleigh, NC 27695
Code Custodian: Borden, R.C.
North Carolina State Univ., Civil Eng. Dept.
Box 7908, Rayleigh, NC 27695
Model Developed for: general use
Documentation: theory, verification
Model Testing: verification
Peer Review: concepts, theory
Availability: public domain, source code, compiled (PC) version
Computer Requirements: Intel 80386 based computer, 2 Mb RAM, CGA, math
coprocessor, DOS 3.3
Abstract:
FLOWNS is a simple-to-use program for generating two dimensional flow nets
for steady-state flow in any saturated rectangular domain with any
combination of constant head or constant flux (including zero flux)
boundary conditions. The domain might be either horizontally (axeal) or
vertically {cross-section) oriented. The program approximates with
discrete values the continuous distributions of potential and stream
function using finite difference approximations of the Laplace equation.
The hydraulic conductivity distribution may be anisotropic and/or
heterogeneous. A contouring program is required to generate the final
stream and equipotential lines.
Remarks:
The program FLOWNS has been verified with an analytical solution for a
layered, heterogeneous, anisotropic, aquitare/aquifer system derived by
Scott Yates in 1988 (see Bramlett and Borden 1990) . The physical model
for the system is a layered sand tank with a partially penetrating inlet
and outlet on the upstream and downstream ends, respectively. Each layer
may be anisotropic but must be homogeneous.
IGWMC Key: 5210 Model name: PULSE
Model category: solute transport
Authors: Slotta, L.S.
Current version:
Release date:
First released:	IGWMC Check-date: 03/91
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Institution of Model Development; Slotta Engineering Associates, Inc
Corvallia, OR 97339
Code Custodian: Heydarpour, J.
Slotta Engineering Associates, Inc.
P.O. Box 1376, Corvallis, OR 97339
Model Developed for: general use
Documentation: user's guide, examples
Model Testing;
Peer Review:
Availability: proprietary, purchase; compiled (PC) version
Computer requirements: IBM PC/AT, DOS 2.0, 256 Kb RAM, CGA
Abstract:
PULSE is a one-dimensional analytical model for solute transport in
confined or unconfined aquifers, calculating concentration distribution in
space and time. It simulates the fate of a contaminant initially present
as a distributed rectangular pulse. The model assumes flow in one
direction only, and no contaminant sources or sinks• Longitudinal
dispersion, adsorption and first-order loss (decay) is included. The
model presents tabular output of contaminant concentration values at
various distances from origin of pulse and for various times.
IGWMC Key: 5211 Model name: CXPMPM
Model category: solute transport
Authors: Slotta, L.S.
Current version:
Release date;
First released:	IGWMC Check-date: 03/91
Institution of Model Development: Slotta Engineering Associates, Inc
Corvallis, OR 97339
Code Custodiani Heydarpour, J.
Slotta Engineering Associates, Inc.
P.O. Box 1376, Corvallis, OR 97339
Model Developed for:
Do cumen ta t i on:
Model Testing:
Peer Review:
Availability:
Computer requirements:
general use
user's guide,
examples
proprietary, purchase? compiled (PC) version
IBM PC/AT, DOS 2.0, 256 Kb RAM, CGA
Abstract:
CXPMPM is a one-dimensional analytical model for simulation of solute
transport in confined or unconfined homogeneous, isotropic aquifers. The
model calculates concentration distributions in space and time due to
one-dimensional advection (stationary flow field), longitudinal
dispersion, linear adsorption, and first-order loss (decay) for up to 250
areal contaminant sources. The inlet boundary is a time-dependent
concentration flux (constant, exponentially decreasing, skewed or bell
shaped distributions). The model provides tabular and graphical output of
results.
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IGWMC Key: 5212 Model name: TDPLUME/TWODPLME
Model category: solute transport
Authors: Slotta, L.S.
Current version:
Release date:
First released:	IGWMC Check-date: 03/91
Institution of Model Development: Slotta Engineering Associates, Inc
Corvallis, OR 97339
Code Custodian: Heydarpour, J.
Slotta Engineering Associates, Inc.
P.O. Box 1376, Corvallis, OR 97339
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer requirements:
general use
user's guide, examples
proprietary, license; compiled (PC) version
IBM PC/AT, DOS 2.0, 256 Kb RAM, CGA
Abstract:
TDPLUME/TWODPLME are two-dimensional analytical solute transport models
for confined or unconfined aquifers, the contaminant being convected and
dispersing in X (flow direction) and Y (orthogonal to the flow direction
in a horizontal plane) directions. Two scenarios can be considered:
initial distribution of contaminant as a number of up to 250 rectangles
with specified concentration, or a number of constantly emitting chemical
sources (line sources: TDPLUME, or large rectangular sources; TWODPLME).
The models are based on one-dimensional stationary ground-water flow, and
include lateral and transverse dispersion, linear adsorption, and
first-order loss (decay). Calculation of concentration distribution in
time and space.
IGWMC Key: 5213 Model name: TDFDlO (Two-Dimensional Finite Difference
1st Order sorption)
Model category: saturated flow, unsaturated flow, solute transport, heat
transport
Authors: Slotta, L.S.
Current version:
Release date:
First released:	IGWMC Check-date: 03/91
Institution of Model Development: Slotta Engineering Associates, Inc
Corvallis, OR 97339
Code Custodian: Heydarpour, J.
Slotta Engineering Associates, Inc.
P.O. Box 1376, Corvallis, OR 97339
Model Developed for
Documen ta t i on
Model Testing
Peer Review
general use
user's guide, examples
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Availability: proprietary, license; compiled (PC) version
Computer requirements: IBM PC/AT, 640 Kb RAM, CGA
Abstract:
TDFD10 is a two-dimensional model for simultaneous simulation of movement
of moisture, transport of heat, and transport and fate of a contaminant in
a shallow unconfined aquifer. The porous medium may be heterogeneous.
The coupled system of non-linear unsaturated/saturated moisture flow and
heat and chemical transport are solved using a finite difference
approximation. The porous medium is partitioned in three fractions: sand,
clay, and organic material, with each fraction first-order sorption
kinetics included. Time integration is performed using the backward Euler
method. Dynamic boundary conditions at the air-porous medium interface
are included. A variety of first- and second-type boundary conditions are
included.
IGWMC Key: 5249 Model name: GRID BUILDER
Model category: preprocessor
Authors:
Current version:
Release date:
First released:	IGWMC Check-date: 04/91
Institution of Model Development: Waterloo Centre for Groundwater Research
University of Waterloo, Waterloo,
Ontario, Canada, N2L 3G1
Code Custodian: McLaren, R.G.
Univ. of Waterloo, Waterloo Centre for Groundwater
Research, Waterloo, Ontario, Canada N2 L 3G1
Model Developed for: general use
Do cumen tat .x on: u s er ' s gu x d e, encamp 1 e s
Model Testing:
Peer Review:
Availability: proprietary, purchase; source code, compiled (PC)
version
Computer Requirements: Intel 80386 based computer, 4 Mb RAM, 5 Mb disk
space, math coprocessor, VGA
Abstract:
GRID BUILDER is a 2 - dimensional, triangular element mesh generator with an
interactive, menu-driven, graphical interface. The program can generate a
completely irregular mesh with internal subdivisions. The user can refine
any subset of elements. The program includes a zoom feature which
facilitates extremely detailed refinement. The program can handle up to
32000 elements, 16000 nodes (with 4 Mb of RAM). It has a built-in
node-numbering scheme for band width optimization. Flexible I/O routines
allow export of grid data to any 2-dimensional finite element model (which
uses triangular elements) or import the user's existing grids.
Remarks:
GRID BUILDER is compiled with the university of Salford FTN77/3 86
compiler. It uses the interactive graphics subroutine library of
Interactive Software Limited.
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IGWMC Key; 5250 Model name: POLLUTE
Model category: solute transport
Authors: Rowe, R.K., and J.R. Booker
Current version:
Release date: 1983
First released: 1983	IGWMC Check-date: 05/91
Institution of Model Development: Univ. of Western Ontario, Pac, of Eng.
Sc., London, Ontario, Canada N6A 5B9
Code Custodian: Code custodian
Univ. of Western Ontario, SACDA, The Faculty of
Engineering Sc., London, Canada N6 A 5B9
Model Developed for: research, general use
Documentation;	theory, user's guide
Model Testing:
Peer Review:
Availability:	proprietary, purchase; source code
Computer requirements:	IBM PC/AT, 640 Kb RAM
Abstract:
POLLUTE is a program for 1-dimensional analysis of pollution migration in
multi- layered soils of finite depths. The program, specifically designed
for the study of leachate migration through clay soils and liners, allows
consideration of the variation of source concentration with time as well
as horizontal flow in an aquifer beneath a clay layer or liner (if
present).
IGWMC Key: 5260 Model name: SQILINER
Model category: unsaturated flow
Authors: Johnson, R.A., E.S. Wood, R.J. Wood, and J. Wozrnak
Current version:
Release date: 12/86
First released: 1983	IGWMC Check-date: 05/91
Institution of Model Development; GCA Technology Division, Inc.
213 Burlington Road, Bedford,
Massachussets 01730
Code Custodian: Teusschler, J.
U.S. EPA/CERI, Center for Env. Res. Information
26 W. Martin Luther King Drive, Cincinnati, OH 45268
Model Developed for: general use
Documentation: theory, user's guide, examples, verification
Model Testing: verification
Peer Review:
Availability: public domain, compiled (PC) version
Computer requirements: IBM PC/AT, DOS 2.1, 256 Kb RAM, CGA; compiler for
other platforms
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Abstract;
The SOILINER modeling system has been developed to assist in the
evaluation of liners for new surface impoundment construction. The
program is a finite difference approximation of the highly non-linear,
governing equation of unsaturated, vertical flow. Since the governing
equation reflects liner heterogeneity and the dependence of liner
properties oil the degree of saturation, SOILINER is capable of accurately
representing infiltration of a variety of compacted soil liner scenarios.
The model can handle multi-layered systems, variable initial moisture
content, and changing conditions on the boundaries of the compacted soil
liner flow domain. The model includes a particle tracking routine for
determining pollutant breakthrough.
IGWMC Key: 5270 Model name: MADPD (Matched Artificial Dispersivity -
Principal Direction method)
Model category: saturated flow, solute transport
Authors: Syriopoulou, D., and A.D. Koussis
Current version:
Release date: 4/88
First released: 1988	IGWMC Check-date: 06/91
Institution of Model Development: Vanderbilt Univ.
Dept. of Civil & Environm. Eng.,
Nashville, TN 37235
Code Custodian: Koussis, A.D.
Vanderbilt Univ., Dept. of Civil and Env. Eng.
Nashville, TN 37235
Model Developed for: research, general use, education
Documentation: theory, user's guide, examples, program structure,
code listing
Model Testing:
Peer Review:	concepts, theory
Availability:	public domain, source code (see references)
Computer Requirements:	IBM PC/AT, DOS 2.0, 640 Kb RAM, CGA
Abstract:
MADPD is a two-dimensional finite difference model for solute transport in
saturated, steady groundwater flow systems with a known pore velocity
distribution. The model is tailored to advection-dominated conditions.
The methodology combines the Principal Directions of transport formulation
with a fractional time stepping algorithm that incorporates a highly
efficient advection-dispersion step. The code can accommodate
space-variable geohydrological parameters, sources of time-varying
strength distributed on entry boundaries, and solute undergoing
first-order decay and linear adsorption. The model can use one- or
two-dimensional grids and Cartesian or curvilinear coordinates.
IGWMC Key: 5290 Model name: MINEFLO
Model category: saturated flow
Authors: Aljoe, W.A., and J.W. Hawkins
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Current version:
Release date:
First released: 1991	IGWMC Check-date: 09/91
Institution of Model Development: U.S. Bureau of Mines
P.O. Box 18070, Pittsburgh, PA 15236
Code Custodian: Aljoe, W.W.
U.S. Bureau of Mines
P.O. Box 18070, Pittsburgh, PA 15236
Model Developed for: general use
Documentation:
Model Testing:
Peer Review:
Availability: public domain, source code, compiled (PC) version
Computer requirements: IBM PC/AT, 640 Kb RAM, CGA
Abstract:
MINEFLQ is a two-dimensional steady-state ground-water flow model based on
the analytical element method of Strack (1989). The model calculates
heads and flow nets for a homogeneous aquifer.
IGWMC Key: 5300 Model name: QUICKFLOW
Model category: saturated flow, porous medium
Authors: Rurnbaugh, III, J.O.
Current version: 1.0
Release date: 9/91
First released: 1991	IGWMC Check-date: 10/94
Institution of Model Development: Geraghty & Miller, Inc. Modeling Group
Reston, Virginia 22091
Code Custodian: Rumbaugh III, J.O.
Geraghty & Miller, Inc., Modeling Group
10700 Park Ridge Blvd., Suite 600, Reston, VA 22091
Model Developed for: general use
Documentation: theory, user's guide, examples, verification
Model Testing: verification, Synth, datasets, code intercomparison
Peer Review: concepts, theory
Availability: proprietary, purchase; compiled (PC) version
Computer Requirements: IBM PC/AT, 640 Kb RAM, EGA/VGA, DOS 3.0
Abstract:
QUICKFLOW is an interactive model, based on the Analytic Element Method,
to simulate two-dimensional steady-state and transient ground-water flow.
The steady-state module simulates flow in a horizontal plane using
analytical functions developed by Strack (1989), including wells, uniform
recharge, circular recharge/discharge areas, and line sources or sinks in
confined and unconfined aquifers. The model generates streamlines,
particle traces and head contours. The transient module calculates heads
using equations developed by Theis (1935) and by Hantush and Jacob (1955)
for confined and leaky confined aquifers, respectively, and includes a
particle tracking option. Each module uses the principle of superposition
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to evaluate the effects of multiple wells in a uniform regional flow field.
Remarks:
The steady-state flow model has been verified using hand calculations,
comparison with the program SLWL by Strack, and comparison with MODFLOW
{"JSCS 3D Modular Flow Model) . The verification results is discussed in
the documentation.
The 3rd edition of the textbook Applied Hydrogeology by C.W. Fetter
(Mcmillan Publishing Company, 1994) contains a diskette with student
versions of the programs FLOWNET, QUICKFLOW, and AQTESOLV. These versions
are fully operational, but limited in capability.
IG'WMC Key: 5310 Model name: PRZMAL
Model category: unsaturated flow, saturated flow, solute transport
Authors: Wagner, J., and C. Ruiz-Calzada
Current version:
Release date: 12/86
First released:	IGWMC Check-date: 09/91
Institution of Model Development: Oklahoma State Univ., School of Chem.
Eng., Stillwater, OK 74074
Code Custodian: Wagner, J.
Oklahoma State Univ., School of Chem. Eng.
Stillwater, OK 74074
Model Developed for:	general use
Documentation: theory, user's guide
Model Testing:
Peer Review:
Availability:	public domain, source code, compiled (PC) version
Computer Requirements:	IBM PC/AT, DOS 2.0, 640 Kb RAM, CGA
Abstract:
PRZMAL is an aquifer linkage model for the numerical Pesticide Root Zone
Model (PRZM), developed by US EPA. It connects PRZM with the analytical
three-dimensional advective-dispersive transport model PLUME3D developed
at Oklahoma State University. This linkage allows the user to predict
contaminant movement from the point of application, in a continuous
manner, into and within the aquifer. PRZM (IGWMC Key # 4720) is a
one-dimensional fxnite difference model which accounts for fate and
transport of organic constituents in the root zone. PLUME3D (IGWMC
Key # 5311) is an analytical solution of the three-dimensional
advective-dispersive transport equation for reactive solutes.
IGWMC Key: 5311 Model name: PLUME 3D
Model category: solute transport
Authors: Wagner, J., S.A. Watts, and D.C. Kent
Current version:
Release date: 6/B5
First released: 1985	IGWMC Check-date: 10/92
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Institution of Model Development; Oklahoma State Univ., School of Chem.
Eng., Stillwater, OK 74074
Code Custodian: Kent, D.C.
Oklahoma State Univ., Dept. of Geology
Stillwater, OK 74078
Model Developed for:
Document at ion:
Model Testing:
Peer Review:
general use
theory, user's guide, examples, code listing
concepts, theory
Availability: public domain, source code
Computer requirements: compiler
Abstract:
PLUME3D is an interactive FORTRAN program based on a closed-form
analytical solution for simulation of the development of a
three-dime it slona1 pluine resulting from a point - source with a continuous
mass flow release rate in an uniform, steady-state, saturated, horizontal
flow field. The model includes advective transport, dispersion m three
dimensions, equilibrium adsorption using a linear isotherm {retardation
factor), and first-order production or decay. All aquifer properties are
assumed constant and uniform throughout the aquifer. The assumptions of
an infinite aquifer depth and a uniform source mass rate can be overcome
by using principles of superposition in space and time.
IGWMC Key: 5312 Model name: PLUME2D
Model category: solute transport
Authors: Wagner,	J., S.A. Watts, and D.C. Kent
Current version:
Release date:	6/85.
First released:	1985	IGWMC Check-date: 10/92
Institution of Model Development: Oklahoma State Univ., School of Chem.
Eng., Stillwater, OK 74074
Code Custodian: Kent, D.C.
Oklahoma State Univ., Dept. of Geology
Stillwater, OK 74078
Model Developed for:
Document a t x on:
Model Testing:
Peer Review:
Availability:
Computer requirements:
general use
theory, user's guide, examples
concepts, theory
public domain, source code
compiler
Abstract:
PLUM32D is an interactive FORTRAN program based on a closed-form
analytical solution for simulation of the development of a two-dimensional
plume resulting from a point source with an constant source mass rate in
an uniform, steady-state, saturated, horizontal flow field. The model
includes advective-dispersive transport, equilibrium adsorption using a
linear isotherm (retardation factor), and first-order production or decay.
The aquifer is infinite in horizontal extent for the vertically-averaged
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solution (e.g., a fully-penetrating injection well), or semi-infinite in
vertical extent for the horizontally-averaged solution (e.g. transport
from a trench at the top of the aquifer). Additional flexibility for
source modeling may be obtained by using superposition in space and time.
IGWMC Key: 5330 Model name: CANSAZ (EPACMS)
Model category: saturated flow, solute transport
Authors: Sudicky, E.A., J,3. Kool, and P.S. Huyakorn
Current version: 2.0
Release date: 1990
First released: 1989	IGWMC Check-date: 10/94
Institution of Model Development: U.S. EPA, Off. of Solid Waste
Washington, D.C. 20460
Code Custodian: Saleera, Z.A.
U.S. EPA, Off. of Solid Waste
OS 331, 401 M Street, S.W., Washington, DC 20460
Model Developed for:
• Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
policy-setting, general use
theory, user's guide
concepts, theory, coding, documentation
public domain, source code, compiled (PC) version
IBM PC/AT, 640 Kb RAM, CGA
Abstract:
EPA's CANSAZ {Combined Analytical-Numerical Saturated Zone model) was
developed to simulate the migration of contaminants beneath surface
impoundments where hydraulic mounding occurs. The model combines an
analytical solution for two-dimensional steady-state ground-water flow,
coupled with both an analytical and a numerical three-dimensional
contaminant transport model. It includes the monte carlo technique to
account for uncertainty in parameter distribution. CANSAZ was meant for
use in the development of national regulation under RCRA.
Remarks:
CANSAZ is a module of the EPA composite model for surface impoundments,
called EPACMS. This model is used by EPA in the Resource Conservation and
Recovery Act delisting program.
IGWMC Key: 5331 Model name: EPACML
Model category: saturated flow, solute transport
Authors: Saleem, Z.A., A.M. Salhotra, D. Marder, J. Kool, B. Lester, and
M. Ungs
Current version:
Release date: 02/90
First released: 02/90	IGWMC Check-date: 10/94
Institution of Model Development: U.S. EPA, Off. of Solid Waste
Washington, D.C. 20460
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Code Custodian: Saleem, Z.A,
U.S. EPA, Off. of Solid Waste
OS 331, 401 M Street, S.W., Washington, DC 20460
Model Developed for: policy setting, general use
Documentation: concepts and theory, input instructions, example
problems
Model Testing:
Peer Review: concepts, mathematical framework, documentation
Availability: public domain, source code
Computer requirements: compiler
Abstract:
The Environmental Protection Agency's Composite Model for Landfills
(EPACML) simulates the movement of contaminants emanating from a hazardous
waste disposal facility. The composite model for landfills consists of a
steady-state, one-dimensional numerical model for simulation of flow in
the unsaturated zone, an unsaturated zone transport model, and a
semi-analytical saturated zone model. The unsaturated zone flow model
flow model provides the velocity used in the unsaturated zone transport
model to compute advective-dispersive transport, subject to linear
adsorption and first-order decay. The resulting contaminant flux at the
water table is used as source term in the three-dimensional saturated zone
transport model. This component includes one-dimensional uniform regional
flow, linear adsorption, first-order decay, and dilution due to direct
infiltration into the groundwater plume for the case of a Gaussian source.
The uncertainty and spatial variability of the chemical properties of the
contaminants and the medium- and environment-specific properties is
quantified using the monte carlo simulation technique.
IGWMC Key: 5332 Model name: EPACMTP {FECTUZ/CANSAZ- 3D)
Model category: saturated and unsaturated flow, solute transport
Authors: Saleem, Z.A., P.S. Huyakorn, J. Kool, A. Salhotra, P. Mineart,
E.A. Sudicky
Current version:
Release date: 07/93
First released: 07/93	IGWMC Check-date: 10/94
Institution of Model Development: U.S. EPA, Off. of Solid Waste
Washington, D.C. 20460
Code Custodian: Saleem, Z.A.
U.S. EPA, Off. of Solid Waste
OS 331, 401 M Street, S.W., Washington, DC 20460
Model Developed for: policy-setting, general use
Documentation: concepts and theory, input instructions, example
problems
Model Testing:
Peer Review: concepts, mathematical framework, documentation
Availability: public domain, source code and compiled version
Computer requirements; Intel 80386 based computer, math coprocessor, 8 Mb
RAM
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Abstract:
EPACMTP (EPA1s Composite Model for leachate migration with Transformation
Products) consists of two modules: 1) the unsaturated zone Finite Element
and semi-analytical Contaminant Transport in the Unsaturated Zone (FECTUZ)
module; and 2) the saturated zone three-dimensional Combined
Analytical-Numerical SAturated Zone (CANSAZ-3D) module. The model
includes a Monte Carlo utility for nationwide uncertainty analysis in
policy-setting model uses. The FECTUZ module is designed to simulate
vertically downward steady-state flow and contaminant transport through
the unsaturated zone above an unconfined aquifer. This program is based
on the VADOFT model and includes extensions to facilitate Monte Carlo
analyses and multi-species straight or branched decay chains. FECTUZ
handles advection, longitudinal dispersion, first-order decay with
daughter product formation, and linear or non-linear Freundlich
equilibrium sorption. FECTUZ computes concentrations at the water
table, which ares used to define the source term in CANSAZ-3D. CANSAZ-3D
simulates three-dimensional steady-state groundwater flow and transient or
steady-state contaminant transport. The program accounts for ambient
groundwater flow, leakage from a land disposal unit and regional recharge.
Contaminant transport in CANSAZ-3D includes three-dimensional advection
and dispersion, first-order decay with daughter product formation, and
linear and nonlinear Freundlich equilibrium sorption. The output from
EPACMTP consists of concentration levels, either at the water table,
and/or at observation wells located in the saturated zone. The output may
result from either a deterministic or a Monte carlo simulation. In the
latter case a postprocessor, POSTCMTP, provides graphic display
capabilities.
IGWMC Key; 5340 Model name: CTRAN/W (Contaminant Transport)
Model category: saturated flow, unsaturated flow, solute transport
Authors:
Current version:
Relea.se date: 1992
First released;	IGWMC Check-date: 06/94
Institution of Model Development: Geo-Slope International
Calgary, Alberta, Canada T2P 2Y5
Code Custodian: Geo-Slope International
#830, S33 6th Avenue S.W., Calgary, Alberta,
Canada T2P 2Y5
Model Developed for: general use
Documentation:
Model Testing:
Peer Review:
Availability: proprietary, license; compiled (PC) version
Computer requirements: Intel 80386 based computer, DOS 3.3, 2 Mb RAM, CGA,
math coprocessor
Abstract:
CTRAN/W is a finite element model for simulation of steady-state and
transient movement of contaminants through saturated/unsaturated soil.
The model allows for advection, dispersion, adsorption and decay. It
handles transient concentration and mass-flux boundary conditions. The
program runs under Microsoft Windows 3.0. and uses a pull-down menu driven
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graphical interface with many graphical display and editing functions. It
is integrated with SEEP/W, a two-dimensional finite element flow
simulator. CTRAN can model contaminant movent by particle tracking from
user-defined locations.
IGWMC Key: 5350 Model name: CHEQMATE
Model category: solute transport, hydrogeochemical
Authors: Haworth, A., S.M. Sharland, P.W. Tasker, and C.J. Tweed
Current version:
Release date: 2/88
First released: 1988	IGWMC Check-date: 12/91
Institution of Model Development: Harwell Laboratory, Theoretical Physics
Lab., Oxon, Oxfordshire, England
Code Custodian; Harwell Laboratory
United Kingdom Atomic Energy Agency, Theoretical Physics
Biv., Oxon, Oxfordshire 0X11 ORA, England
Model Developed-for: research, general use
Documentation: theory, user's guide, examples, program structure
Model Testing:
Peer Review:
Availability: proprietary, license; source code {main frame),
compiled (PC) version
Computer requirements: Intel 80386 based computer, 4 Mb RAM, CGA, math
coprocessor,* compiler for other platforms
Abstract:
The CHEQMATE {CHemical Equilibrium with Migration And Transport Equations)
program has been developed to model evolution of spatially inhomogeneous
aqueous chemical systems and mineral inventory in time and space.
CHEQMATE models one-dimensional diffusion and electromigration of ionic
species with chemical equilibrium provided by the geochemical code
PHREEQ3. The transport and chemical parts of the code are iteratively
coupled, so that local chemical equilibrium is maintained as the transport
processes evolve. It includes an automatic mineral accounting procedure,
so that solid phases may be added or removed from the system as
precipitation or dissolution occurs. The finite difference equations are
solved with a simple explicit numerical scheme.
IGWMC Key: 5390 Model name: CSUGAS
Model category: vapor flow/transport
Authors: Sabadell, G.P., J.J. Eisenbeis, and D.K. Sunada
Current version:
Release date: 1991
First released: 1991	IGWMC Check-date: 01/92
Institution of Model Development: Colorado State Univ., Dept. Civil Eng.
Fort Collins, CO 80523
Code Custodian: Sunada, D.K.
Colorado State Univ., Dept. of Civil Eng.
Fort Collins, CO 80523
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Model Developed for:
Documentation;
Model Testing:
Peer Review:
Availability:
Computer requirements: compiler
research, general use
theory, user's guide, examples, verification
verification, field datasets
Abstract:
CSUGAS is a finite difference model for simulating one-, two-, or
three-dimensional compressible gas flow in a porous medium. It can model
steady-state and transient conditions and computes soil gas pressure
distribution due to hydrologic or artificial influence. It can be used to
evaluate the feasibility of soil vapor extraction, provides a quantitative
estimate of design parameters and may be used to evaluate various system
designs.
IGWMC Key: 5391 Model name: CSUPAW {Colorado State University Pit And
Well)
Model category; saturated flow
Authors: Sunada, D.K.
Current version: 3.0
Release date: 7/88
First released: 1984	IGWMC Check-date: 04/92
Institution of Model Development: Colorado State Univ., Dept. Civil Eng.
Fort Collins, CO 80523
Code Custodian: Sunada, D.K.
Colorado State Univ., Dept. of Civil Eng.
Fort Collins, CO 80523
Model Developed for: research, general use, education
Documentation: theory, user's guide, examples
Model Testing:
Peer Review:	concepts, theory
Availability:	proprietary, purchase; compiled (PC) version
Computer requirements:	IBM PC/AT, DOS 2.1, 256 Kb RAM, CGA/EGA/VGA
Abstract:
The interactive program CSUPAW allows the user to predict the response of
a water-table to discharge from wells or artificial recharge of water from
rectangular basins in a homogeneous aquifer of infinite areal extent, in a
homogeneous stream-aquifer system, or in an aquifer having a vertical
impermeable boundary. The model calculates discharge (recharge) to the
stream in a stream-aquifer system at times specified by the user.
Utilization of graphics allow visual evaluation of results. The program
is based on Glover's (19 60) analytical solution for recharge from a
rectangular basin. The principle of superposition is used to obtain the
additional solutions for finite aquifers and variable rate recharge.
IGWMC Key: 5392 Model name: CSUFDM (Colorado State University Finite
Difference Model)
Model category: saturated flow
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Authors: Close, B. , J.W. Warner, G, Sunada, arid D.K, S una da
Current versions 2.0
Release date: 1986
First released: 1986	IGWMC Check-date: 04/92
Institution of Model Development: Colorado State Univ., Dept. Civil Eng.
Fort Collins, CO 80523
Code Custodian: Sunada, D.K.
Colorado State Univ.., Dept. of Civil Eng.
Fort Collins, CO 80523
Model Developed for: research, general use, education
Documentation: theory, user's guide, examples
Model Testing:
Peer Review:
Availability: proprietary, purchase; compiled (PC) version
Computer requirements:	IBM PC/AT, DOS 2.0, 640 Kb RAM, math coprocessor, CGA
Abstract:
CSUFDM is a finite difference model for steady-state or transient
two-dimensional areal flow in a single-layer heterogeneous, anisotropic
confined, semi-confined, or unconfined aquifer. The model uses an
implicit, central finite difference formulation for which is solved using
Gauss elimination. The model employs a dynamic core allocation. The user
can specify impermeable (no-flow), constant head, and underflow boundary
conditions. The model calculates at any time interval head distribution,
discharge rates between grid cell, discharge to and from streams, mass
balance, and difference in head between initial head and current head.
The model has an interactive input and (graphic) output processor.
IGWMC Key: 5460 Model name: Groundwater Discharge Tests: Simulation
and Analysis
Model category: saturated flow; aquifer test analysis
Authors: Clarke, D.
Current version:
Release date: 1988
First released: 1988	IGWMC Check date: 07/92
institution of Model Development: Clarke Computer Services, Australia
Code Custodian: Clarke, D.
Clarke Computer Services
20 Musgrave St., Crystal Brook, 5523, Australia
Model Developed for: general use
Documentation: user's guide, program structure, code listing
Model Testing:
Peer Review:
Availability: proprietary, purchase; source code, compiled (PC)
version
Computer requirements: IBM PC/AT, DOS 2.0, 640 Kb RAM, math coprocessor, CGA
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Abstract:
This software is a menu-driven series of programs for designing and
analyzing aquifer tests. It includes the following modules: (1) DTDHA -
Discharge Test Data Handling and Analysis; this module uses the modified
Sternberg and the Rorabaugh analysis for step-drawdown and recovery;
DRAWDOWN - drawdown in bounded or unbounded (leaky) confined aquifers
using the Theis well function or the' leaky confined aquifer well function;
(3 5 NEUMAN - drawdown in an unconfined aquifer using Neuman's well
function; (4) ANALYZE - determining transmissivity and storage coefficient
for a (leaky) confined aquifer using least squares; and (5) various file
manipulation and plotting utilities.
IGWMC Key: 5470 Model name: MODMOC- 3D
Model category: solute transport
Authors: Williams, P.
Current version: 1.0
Release date: 1/92
First released: 1992	IGWMC Check-date: 03/92
Institution of Model Development*. Aquifer Simulation, Inc.
Fremont, NH 03044
Code Custodian: Williams, P.M.
Aquifer Simulation Inc.
102 Chester Road, Fremont, NH 03044
Model Developed for: general use
Documentation: theory, user's guide
Model Testing: verification, code mtercomparison
Peer Review:
Availability: proprietary, purchase,* compiled (PC) version
Computer Requirements: IBM PC/AT, 640 Kb RAM (small version); Intel 80386
based computer, 4 Mb RAM, math coprocessor, CGA
Abstract:
MODMOC-3D adds a three-dimensional reactive, advective-dispersive solute
transport module to the USGS finite difference flow model MODFLOW. The
solute transport module is based on the method of characteristics and is
compatible with a slightly modified version of the 3D multi-layered
version of MODFLOW. MODMOC-3D can be run in 2D or 3D as a flow model, a
flow and solute transport model, or as a solute transport model only.
When run as a solute transport model, MODMOC-3D uses the starting water
levels and aquifer parameter data from the flow model input file to
calculate velocities. The code has been verified against the test problems
published in the MODFLOW and USGS 2D MOC solute transport model.
¦ Remarks:
MODMOC-3D has limited documentation. For description
of the flow part, it uses the original USGS MODFLOW documentation
(McDonald and Harbaugh, 1988); for the transport part it refers to the
documentation of the USGS 2D MOC model (Konikow and Bredehoeft, 197 8) . A
brief set of user instructions is available. Verification has been
limited (no 3D transport verification) and verification information is not
distributed.
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IGWMC Key; 54 80 Model name: NORIA
Model category; saturated flow, unsaturated flow, vapor flow/transport,
heat transport
Authors; Bisler, N.E.,
Current version:
Release date:
First released: 19B5	IGWMC Check-date: 06/92
Institution of Model Development: Sandia Nat. Lab., Fluid Mech. & Heat
Transfer Div., Albuquerque, New Mexico
Code Custodian: Bisler, N.E.
Sandia Nat. Laboratories, Fluid Mech. & Heat Transfer Div.
Albuquerque, NM 87158
Model Developed for: research, general use
Documentation:
Model Testing;
Peer Review;
Availability: restricted public domain
Computer Requirements: compiler
Abstract:
NORIA is designed to simulate liquid, vapor, air and energy transport in
partially saturated and saturated porous media. The mechanisms included
in Noria are (1) transport of water, vapor, and air due to pressure
gradients; transport of the previous due to density gradients; C3) binary
diffusion of air; (4) Knudsen diffusion of vapor and air; (5)
thermodiffusion of vapor and air; (6) conduction of sensible heat; ("7)
convection of sensible heat; (8) evaporation and condensation; {9}
nonequalibrium and equilibrium vapor pressure models; and (10) capillary
pressure. Most thermodynamic and constitutive variables may be defined by
the user in terms of remaining independent and dependent variables.
Remarks:
NORIA was tested by Sandia National Labs where it was compared against a
suite of problems for which there were analytical and numerical solutions
or experimental results. P1TR0S and TOUGH were also tested. NORIA had
difficulty solving over half the problems. Difficulties came from built
in time-step-size criteria. Problems solved by NORIA were extremely
accurate. Documentation on flux boundaries was unclear. NORIA
simulations took the longest to run of the three codes tested.
IGWMC Key: 5500 Model name: BI01D
Model category: saturated flow, solute transport
Authors: Srinivasan, P., and J.W. Mercer
Current version: 1.2
Release date: 19 89
First released: 1987	IGWMC Check-date: 01/93
Institution of Model Development: GeoTrans, Inc,
Sterling, V"A 22170
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Code Custodian: P. Srinivasan
GeoTrans, Inc.
46050 Manekin Plaza, Suite 100, Sterling, VA 22170
Model Developed for: general use, education
Documentation: theory, user's guide, examples, verification
Model Testing: verification, lab. dataaets
Peer Review: concepts, theory
Availability: proprietary, purchase? compiled (PC) version
Computer Requirements: IBM PC/AT, DOS 3.3, 640 Kb RAM, math coprocessor,
CGA/EGA/VGA/Hercules
Abstract:
BI01D is a one-dimensional finite difference model for simulation of
biodegradation and sorption of a degradable hydrocarbon. Advectlve and
dispersive transport of a substrate and an electron acceptor are
considered, assuming an uniform flow field in either the saturated or
unsaturated zone. The reactions may include first-order, aerobic (Monod
function), or anaerobic {Michaelis-Menten kinetics) degradation, and
adsorption described by a linear, Freundlich or Lahgmuir equilibrium
isotherm. Dirichlet, Neumann, or Cauchy boundary conditions are allowed.
The resulting nonlinear problem is solved using a Newton-Raphson iterative
technique. The program includes an user-friendly preprocessor and post
simulation display graphics. The program assumes flow velocities are
known.
Remarks:
For graphics, BI01D uses PLOT 88 software from PLOTWORKS, Inc. which
supports various printers and plotters.
IGWMC Key: 5501 Model name: GEOTRACK
Model category: saturated flow
Authors: Srinivasan, P.
Current version:
Release date: 9/91
First released:	IGWMC Check-date: 09/91
Institution of Model Development: GeoTrans, Inc,
Sterling, VA 22170
Code Custodian: Srinivasan, P.
GeoTrans, Inc.
46050 Manekin Plaza, Suite 100, Sterling, VA 22170
Model Developed for: general use
Documentation:
Model Testing:
Peer Review:
Availability; proprietary, license,* compiled (PC) version
Computer requirements: IBM PC/AT, DOS 3.0, 640 Kb RAM, CGA
Abstract:
GEOTRACK is a graphics software program used to display pathlines
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generated by the USGS particle tracking program , MODPATH, for
ground-water flow simulations performed using the USGS three-dimensional
finite difference flow model MODFLOW or the three-dimensional finite
difference flow and transport model FTWORK. A simplified fence-diagram
with hidden line removal can be constructed to be displayed together with
the calculated pathlines. The program allows for importing a surface
feature map showing buildings, trenches, roads, etc. The program allows
the user to rotate the three-dimensional diagram in real time.
IGWMC Key: 5510 Model name: IGSM (Integrated Groundwater and Surface
Water Model)
Model category: saturated flow, unsaturated flow, surface runoff
Authors: Yoon, Y.S., and M.N. Saquib
Current version:
Release date: 8/90
First released: 1976	IGWMC Check-date: 02/91
Institution of Model Development: James M. Montgomery, Consulting
Engineers Inc.
Sacramento, California 95825
Code Custodian: Saquib, M.N.
James M. Montgomery, Consulting Engineers, Inc.
740 University Avenue # 160, Sacramento, CA 95825
Model Developed for: general use
Documentation: theory, user's guide, examples, program structure,
code listing
Model Testing:
Peer Review:
Availability: public domain, source code, compiled (PC) version
Computer Requirements: IBM PC/AT, DOS 2.1, 640 Kb RAM, CGA, 5 Mb disk
space, math coprocessor; compiler for larger
versions or other platform
Abstract:
IGSM is a transient finite element model for simulation of any combination
of multiple layered confined, unconfined and leaky confined aquifer
systems. Each layer is allowed to have a different spatial extent. In
addition the model allows for conversion of unconfined flow to confined
flow and vice versa. The model can use both triangular and quadrilateral
elements. It includes a soil moisture accounting procedure capable of
simulating direct runoff, evapotranspiration and deep percolation. It
also includes a data management system which allows for easy evaluation of
various surface water diversion and pumping schemes. In addition to
calibrating the model with historical recorded groundwater levels,
historic recorded streamflows can also be used to calibrate the model.
Remarks:
IGSM is also used in the Pajaro Valley hydrologic study (see user
references). Here, IGSM is used in conjunction with PVGSM. The
groundwater quality simulation component in PVGSM is based on a finite
element solution of the convective-dispersive transport equation. The
model allows for first order chemical and biochemical reactions through a
decay term. Furthermore, the model can simulate adsorption with the
Freundlich isotherm.
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The 1990 version of IGSM has been developed under contract with the U.S.
Bureau of Reclamation. The original version of the model was developed in
1976 by Young S. Yoon at the Univcrsitv of California, Los Angeles. In
1987, the model was applied to the Central Valley, California, to assess
streamflow depletion caused by surface water and groundwater utilization.
The wort was conducted by Boyle Engineering Corporation for the California
State Water Resources Control Board. This latter version is known as
CVGSM {Central Valley Groundwater and Surface Water Model.)
IGWMC Key: 5520 Model name: FTWORK
Model category: saturated flow, solute transport
Authors: Faust, C.R., P.N. Sims, C.P. Spalding, and P.F. Andersen
Current version: 2.8
Release date: 3/93
First released: 1990	IGWMC Check-date: 06/94
Institution of Model Development: GeoTrans, Inc,
Sterling, VA 22170
Code Custodian: Spalding, C.
GeoTrans, Inc.
46050 Manekin Plaza, Suite 100, Sterling, VA 22170
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
Abstract:
general use
theory, user's guide, examples, program structure,
code listing, verification
verification, code intercomparison
public domain, source code, compiled (PC) version
Intel 80386 based computer, 4 Mb RAM, CGA, math
coprocessor; compiler for other platforms
FTWORK is a three-dimensional, block-centered finite difference model for
simulating one-, two-, and three-dimensional steady-state and transient
flow and transient single species solute transport in saturated media
under confined or unconfined conditions. The model supports both areal
and cross - sectional simulations. The flow equation is posed in terms of
hydraulic head, and the transport equation is posed in terms of
concentration. The model handles heterogeneities and anisotropy for flow.
The transport equation includes advection, hydrodynamic dispersion, first
order decay, and linear and non-linear equilibrium adsorption. Cross
product terms for dispersion can be included in the transport
calculations. The model includes a parameter estimation option
(semi-automatic history matching) of the steady-state flow equation, using
a Gauss-Newton non-linear least-squares optimization technique with a
Marquardt correction. This option may be used to estimate hydraulic
conductivity and recharge. The model supports variable grid spacing and
approximation of layers that have irregular thickness and/or are not
horizontal by using def ormed coordinate approximations * Boundary
conditions include prescribed head, prescribed concentration, prescribed
flux of water or solute mass, and head-dependent flux. It also handles
single and multi-aquifer wells and chemical sources and sinks. The model
can be used in a quasi-three dimensional mode. FTWORK has an option to
use either central or upstream weighting of the advection term and central
or backwards weighting of the time derivative. Three different solves are
included for different types of problems based upon the Slice Successive
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Over Relaxation (SSOR) method. The program has many output options,
including the creation of a main output file containing a summary of the
input data, convergence error, array data, and, if parameter estimation is
performed, summary statistics and parameter multipliers, and residuals.
Optional output files include MODFLOW- type head and concentration
distributions for graphic postprocessing, sensitivity coefficients
generated in the parameter estimation procedure, computed heads and/or
concentrations as a function of time for selected nodes, head residual,
head and/or concentration at end of simulation to be used as initial
conditions for a subsequent run, and a cell-by-cell flux file.
Remarks:
The major limitations of the FTWORK code are: 1) water density is
independent of concentration, thus seawater intrusion and brines cannot be
simulated; 2) for water-table conditions, the free surface must not be
steep and resaturation of dry grid blocks cannot occur; and 3) treatment
of dispersive processes is based on uniform longitudinal and transverse
dispersivity concepts. The program includes a subroutine which allows
linkage with the particle tracking program MODPATH.
A text-based preprocessor is available from IGWMC.
IGWMC Key: 5530 Model name: SANDWICH
Model category: saturated flow, solute transport
Authors: Huyakorn, p.S.
Current version:
Release date:
First released:
et al,
IGWMC Check-date: 02/91
Institution of Model Development: GeoTrans, Inc,
Sterling, VA 22170
Code Custodian: GeoTrans, Inc.
46050 Manekin Plaza, Suite 100, Sterling, VA 22170
Model Developed for: research, general use
Documentation: theory, user's guide, examples
Model Testing:
Peer Review:
Availability:	proprietary, license; source code
Computer Requirements:	compiler
Abstract:
SANDWICH is a 3D finite - element model for analyzing groundwater flow and
contaminant transport in multi- layered confined/unconfined aquifer
systems. The model is designed to simulate fluid flow and solute
transport in fully-saturated porous media. Matrix assembly is performed
in a horizontal slice-by-slice manner to improve efficiency. The model
employs a combination of rectangular and triangular elements. Coupling of
aquifer and aquitards is handled using a convolution integral to evaluate
leakage fluxes and incorporate these fluxes into the matrix system. For
aquifers comprised of several nodal sublayers, the matrix solution for
each aquifer is performed using a two-stage algorithm, the ALternate
sublayer And Line Sweep (ALALS) procedure.
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Remarks:
In addition to fully three-dimensional problems, SANDWICH may be used to
solve quasi-3D and axisymmetric geometries. For situations where the
uppermost aquifer is an unconfined aquifer or a confined aquifer
undergoing storage conversion due to overpumping, the SANDWICH model
performs nonlinear Picard iterations to adjust for head-dependent
saturated thickness and changes in storage coefficient values. The model
includes automatic mesh and time step generation*
IGWMC Key: 5540 Model name: FRESAL
Model category: fresh/salt water flow
Authors: Kovar, K.
Current version:
Release date: 1980
First released: 1980	IGWMC Check-date: 12/92
Institution of Model Development: Nat. Inst, of Public Health and
Environm. Protection
Bilthoven, The Netherlands
Code Custodian: Kovar, K.
RIVM - Nat. Inst, for Public Health and Environm.
Protection, P.O. Box 1, 3720 BA Bilthoven, The Netherlands
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer requirements:
general use
theory, user's
guide, examples
proprietary, license; source code
compiler
Abstract:
FRESAL is a finite element model for calculation of the steady-state
interface between salt and fresh water in the subsurface. The program can
be used for problems dealing with a single aquifer, completely or
partially overlain by a semi-permeable layer, or two aquifers separated by
a semi-permeable layer. In the latter case, the saline-fresh'water
interface is situated in the lower aquifer, with only fresh water in the
upper aquifer. The model assumes flow in the fresh water section to be
horizontal and in the semi-permeable layer to be vertical. Saline
groundwater flow is ignored. Density effects are introduced by using the
saline groundwater potential.
IGWMC Key: 5550 Model name: RADFLOW
Model category: saturated flow
Authors: Reilly, T.E.
Current version;
Release date: 19 86
First released: 1984	IGWMC Check-date: 03/91
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Institution of Model Development: U.S. Geological Survey, Water Resources
Div., National Center, Reston, VA 22092
Code Custodian: U.S. Geological Survey, Water Resources Div., WATSTORE
Program Office, 437 National Center, Reston, VA 22092
Model Developed for:
Documentation:
Model Testing:
Peer Review;
Availability;
Compu ter Requ i rernent s :
general use
theory, user's guide, examples, program structure,
code listing, verification
verification
concepts, theory, documentation
pub1xc domain, source code
compiler, DISSPLA graphics library
Abstract:
RABFLOW is a radial-symmetric Galerkin finite-element model for evaluation
of radial flow of groundwater, such as at a pumping well, recharge basin,
or injection well. It is capable of simulating anisotropic,
inhomogeneous, confined, or pseudo-unconfined - constant saturated
thickness - conditions. The program uses linear triangular elements and
backwards finite difference in time. A preprocessor, called MBSH,
contains algorithms for generating a triangular mesh, and creates and
formats input data files for the groundwater flow model. A postprocessing
program, called RADFLOW-S, produces graphical displays and statistical
evaluations of water-level changes and includes a slightly modified
version of the original RADFLOW simulation model.
Remarks:
The flow region is radially symmetric with a discharging well at the
center of the modeled region. Pumping is assumed to have little effect on
water levels at large distances from the pumping well (constant head
boundary). The lower boundary of the flow region must be a no-flow
boundary. The upper boundary may be a no-flow or a free surface boundary.
IGWKC Key: 5560 Model name: FLOW3D
Model category: saturated flow
Authors: Durbin,	T.J., and C. Berenbroeck
Current version:
Release date: 1985
First released: 1984	IGWMC Check-date: 03/92
Institution of Model Development: U.S. Geological Survey, Water Resources
Div., Menlo Park, Calif.
Code Custodian: Durbin, T.J.
Hydrologic Consultants, Inc.
1947 Galileo Ct., Davis, CA 95616
Model Developed for
Documentation
Model Testing
Peer Review
Availability
Computer requirements
research, general use
concepts and theory, example application
concepts, mathematical framework
public domain, source code
compiler
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Abstract:
The FL0W3D Galerkin finite element model solves the transient
three-dimensional ground-water flow equation for a heterogeneous,
anisotropic unconfined aquifer system. The model uses a fully-implicit
finite difference approach in time. The three-dimensional grid is
assembled from stacks of prismatic elements in each of which three
tetrahedrons are fitted. This allows, among others, for layer pinch-outs.
The model can handle a free-surface boundary at the top of the aquifer
described by a linearized PDE. It follows the geometric changes of the
top boundary in time by locally deforming the grid. The model allows for
local rotation of the hydraulic conductivity tensor, and supports both
point sources/sinks (head-dependent pumpage, water use by phreatophytes,
streams), and distributed sources/sinks (head-independent recharge,
constant flux).
IGWMC Key: 5561 Model name; TRANS3D
Model category, solute transport
Authors: Durbin,	T.J.
Current version:
Release date:	1985
First released:	1984	IGWMC Check-date: 11/93
Institution of Model Development: Williamson and Schmid, Hydrotec Div.
260 Russell Boulevard, Suite B, Davis,
CA 95616
Code Custodian: Durbin, T.J.
Hydrologic Consultants, Inc.
1947 Galileo Ct., Davis, CA 95616
general use
concepts and theory
Model Developed for:
Do cumen t a 11on:
Model Testing:
Peer Review:
Availability: public domain, source code
Computer requirements: compiler.
Abstract:
TRANS3D is a three-dimensional finite element model for simulating
conservative solute transport in heterogeneous porous media. The model
uses tetrahedral elements. At each time step the heads produced by FLOW3D
are used to calculate velocities. The model supports prescribed
concentration and solute flux boundaries, and distributed and non/point
sources/sinks (e.g., concentration of recharge).
IGWMC Key: 557 0 Model name: FLSTAT
Model category: saturated flow
Authors: Lieste,	R., E.J.M. Veling, and C. van den Akker
Current version;
Release date:	19 88
First released:	19B8	IGWMC Check-date: 11/92
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Institution of Model Development: Nat, Inst, of Public Health and
Environm. Protection
Bilthoven, The Netherlands
Code Custodian: Lieste, R,
RIVM - Nat. Inst, for Public Health and Env. Protection
P.O. Box 1, 3720 BA Bilthoven, The Netherlands
general use
theory, user's guide,
examples
Model Developed for:
Documentation:
Model Testing:
Peer Review: concepts, theory
Availability: proprietary, license; source code
Computer Requirements: compiler
Abstract:
FLSTAT (FLow STATionary) is a program for forwards and backwards
calculation of streamlines and residence times, given the two-dimensional
areal distribution of hydraulic heads is known (from field measurements or
flow model). It assumes a rectangular model domain with a grid of
rectangular elements, which can be refined locally. The model requires as
input the hydraulic conductiviLy in x- and y-direction and the porosity
per element. The coupled differential equations are solved explicitly.
The model includes an automatic time-step control routine. The
streamlines are calculated from user-specified starting points. The
program can provide plotoutput for hydraulic head contours, streamlines
and isochrones.
Remarks:
MAKEPLOT is a generalized graphic display package for ground-water modeling
developed by the Nat. Inst, for Public Health and Environm. Protection,
The Netherlands. It uses a meta-language concept which facilitates using
standard output be generated by simulation models as input for the graphic
routines. The package can display contours, isochrones, velocity vector
plots and pathline trajectories.
IGWMC Key: 5600 Model name: STLINE
Model category: saturated flow
Authors:
Current version:	1.14
Release date:	1/90
First released:	1987	IGWMC Check-date: 04/91
Institution of Model Development: GeoTrans, Inc,
Sterling, VA 22170
Code Custodian: Ward, D.S.
GeoTrans, Inc.
46050 Manekin Plaza, Suite 100, Sterling, VA 22170
Model Developed for: general use
Documentation:
Model Testing:
Peer Review:
Availability: proprietary, license; source code
Computer requirements: compiler
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Abstract:
STLINE is a 3D particle tracking program using intercell flow rates
computed by a finite difference model. The specific discharge vectors are
converted to average linear flow velocities. Particle movements within
the velocity field are computed by a linear interpolation scheme using a
local coordinate system embedded in the global coordinate system of the
numerical model. Intracell-particle translations and traveltimes are
based on a linear variation in velocities in the cell. The trajectory of
each particle is stored in memory as a series of particle translations
each with a specific and accumulated travel time within the global
coordinate system. Particle trajectories can be displayed in each of the
three orthogonal planes of the Cartesian coordinate system.
IGWMC Key: 5620 Model name: SUMMERS
Model category; solute transport
Authors: van der Heijde, P.K.M.
Current version: 1.0
Release date: 3/93
First released: 1993	IGWMC Check-date: 06/94
Institution of Model Development; U.S. EPA, Environmental Research Lab.
College Station Road, Athens, GA 30613
Code Custodian: Van der Heijde, P.K.M. (IGWMC version)
International Ground Water Modeling Center
Colorado School of Mines, Golden, CO 80401
Model Developed for: general use
Documentation: concepts and theory
Model Testing:
Peer Review:
concepts
Availability: public domain, source code, compiled (PC) version
Computer requirements: IBM PC/AT, 640 Kb RAM, CGA
Abstract:
SUMMERS is a screening level interactive program for estimating soil
cleanup levels. The model assumes that a percentage of rainfall at a
polluted site will infiltrate and desorb contaminants from the soil based
on equilibrium soil-water partitioning. Using a mass balance approach and
assuming equilibrated, complete mixing in the aquifer, the soil cleanup
level is calculated from the original soil concentration, the
concentration of the infiltrating water, and an equilibrium coefficient.
The SUMMERS model was developed to estimate when contaminant
concentrations in the soil will produce aquifer contaminant concentrations
above acceptable levels. The resultant soil concentrations can then be
used as guidelines in estimating boundaries or extent of soil
contamination and specifying soil cleanup goals for remediation. The
model does not account for volatilization.
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IGWMC Key: 5630 Model name: MULTIMED
Model category: unsaturated flow, saturated flow, solute transport
Authors: Salhotra, A.M., P. Mineart, S. Sharp-Hansen, and T. Allison
Current version; 1.01
Release date: 12/92
First released: 1990	IGWMC Check-date: 01/93
Institution of Model Development: U.S. EPA, Environmental Research Lab.
College Station Road, Athens, GA 30613
Code Custodian: U.S. EPA, Center for Exposure Assessment Modeling (CBAM)
Env. Res. Lab., College Station Road, Athens, GA 30613-0801
Model Developed for: general use
Documentation: theory, user's guide, examples
Model Testing:
Peer Review: concepts, mathematical framework, documentation
Availability: public domain, source code, compiled {PC) version
Computer Requirements: Intel 803 86 based computer, 4 Mb RAM, math
coprocessor, CGA; compiler for other platforms
Abstract:
MULTIMED is a multimedia transport model that simulates the movement of
contaminants leaching from a waste disposal facility. The model includes
two options for simulating leachate flux. Either the infiltration rate to
the unsaturated or saturated zone can be specified directly, or a landfill
module can be used to estimate the infiltration rate. The landfill module
is one-dimensional and steady-state, and simulates the effect of
precipitation, runoff, infiltration, evapotranspiration, barrier layers
(which can include flexible membrane liners), and lateral drainage. A
steady-state, one-dimensional, semi-analytical module simulates flow in the
unsaturated zone. The output from this module, water saturation as
function of depth, is used as input to the unsaturated transport module.
The unsaturated transport module simulates transient, one-dimensional
(vertical) transport and includes the effects of longitudinal dispersion,
linear adsorption, and first-order decay.
Output from this module, i.e. steady-state or time-varying concentrations
at the water table, is used to couple the unsaturated zone transport
module with a steady-state or transient, semi-analytical saturated zone
transport module.
The saturated zone transport model of MULTIMED includes one-dimensional
uniform flow, three-dimensional dispersion, linear adsorption
{retardation), first-order decay, and dilution due to direct infiltration
into the ground-water plume. Contamination of a surface stream due to the
complete interception of a steady-state saturated zone plume is simulated
by the surface water module. Finally, the air emissions and the
atmosphere dispersion modules simulate the movement of chemicals into the
atmosphere. The module includes option for Monte Carlo simulations.
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IGWMC Key: 56S0 Model name: FLASH
Model category: unsaturated flow, heat transport, porous medium, fractures
Authors: Baca, R.G., and 3.0. Ma gnus or.
Current version:
Release date; 5/92
First released: 1992	IGWMC Check-date: 07/92
Institution of Model Development: Idaho Nat. Eng. Lab., Hydrology Unit
P.O.Box 1625, Idaho Falls, Idaho 83415
Code Custodian: Baca, R.G.
Idaho Nat. Eng. Laboratory, Geoscience Group
P.O. Box 1625, Idaho Falls, ID 83415
Model Developed for: general use
Documentation: theory, user's guide, examples, program structure,
verification
Model Testing: verification, code intercomparison
Peer Review: concepts, theory
Availability: public domain, source code
Computer Requirements: compxler
Abstract:
FLASH is a finite element model for simulation of two-dimensional,
cross-sectional, variably saturated fluid flow in fractured porous media
at an arid site, together with two-dimensional, horizontal, saturated flow
in an underlying unconf ir.ed aquifer. In addition, the code has the
capability to simulate heat conduction in the vadose zone. The Richard's
equation for variably saturated flow is solved iteratively using a Picard
or Newton iteration technique, the unconfined flow equation is solved
using Newton-Raphson iteration. The variably saturated module handles
1st, 2nd and 3rd type b.c.'s, the saturated module only 1st and 2nd type
b.c.'s. The FLASH code can be interfaced with the FLAME code to simulate
contaminant transport in the subsurface.
Remarks:
The FLASH and FLAME (IGWMC Key # 5661) codes are extensions and refinements
'of the MAGNUM fluid flow code (IGWMC Key # 4590) and the CHAINT contaminant
transport code (IGWMC Key # 3791).
IGWMC Key: 5661 Model name: FLAME
Model category: solute transport, porous medium, fractures
Authors: Baca, R.G., and S.O. Magnuson
Current version:
Release date: 6/92
First released: 1992	IGWMC Check-date: 08/92
Institution of Model Development: Idaho Nat. Eng. Lab., Hydrology Unit
P.O.Box 1625, Idaho Falls, Idaho 83415
Code Custodian: Baca, R.G.
Idaho Nat. Eng. Laboratory, Geoscience Group
P.O. Box 1625, Idaho Falls, ID 83415
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Model Developed for
Documentation
Availability:
Computer Requirements:
research, general use
theory, user's guide, examples, verification
Model Testing: verification, code intercomparison
Peer Review: concepts, theory
public domain, source code
compiler
Abstract:
FLAME is a finite element code designed to simulate two-dimensional,
cross - sectional subsurface transport of low-concentration contaminants in
exther time"dependent or steady-state, known flow field xn a hxghly
heterogeneous variably-saturated porous media with complex stratigraphy.
The code can be applied to two-dimensional transport in an arid vadose
zone or in an unconfined aquifer. FLAME handles advective-dispersive
transport, equilibrium sorption using a linear isotherm, first-order
decay, and a complex source/sink term. It accommodates advection-dominated
mass transport. In addition, the code has the capability to describe
transport processes in a porous media with discrete fractures. It
describes the mass transfer between the porous media and discrete
fractures.
Remarks:
FLAME can handle both Dirichlet and Neumann transport boundary conditions.
The code can model transport of contaminants xn a sxngle phase, being
either liquid, gaseous (e.g. organic vapors), or colloidal. The modified
equation approach of Fletcher wxth a built-xn dissipation mechanism is
used to dampen oscillations in a convection dominated transport system.
The resulting finite element matrix equations are solved by a Gaussian
elimination procedure without pivoting. Two solvers are used: 1) standard
band solver utilizing a skyline storage scheme, and 2) frontal method.
IGWMC Key: 567 0 Model name: INTERCHANGE
Model category: saturated flow, ground-/surface water hydraulics
Authors: Glover,	K.C.
Current version:
Release date: 1988
First released: 1988	IGWMC Check-date: 07/92
Institution of Model Development: U.S. Geological Survey, Water Resources
Div., Cheyenne, Wyoming 82003
Code Custodian: Glover, K.C.
U.S. Geological Survey, Water Resources Div.
2120 Capitol Avenue, P.O. Box 1125, Cheyenne, WY 82003
Model Developed for:
Documentation:
Model Testing:
Peer Review:
general use
theory, user's guide, examples,
code listing, verification
verification
concepts, theory, documentation
program structure,
Availability: public domain, source code
Computer Requirements: compiler
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Abstract:
INTERCHANGE is a finite element model developed for predicting changes in
streamflow as a result of ground-water pumping. It can handle streams
that flow intermittently due to leakage to the aquifer or diversion for
irrigation or become perched due to declining hydraulic head in the
aquifer. The model couples the equation for transient two-dimensional
confined or unconfined ground-water flow with the kinematic equations of
one-dimensional open-channel, flow using Darcy's law for vertical flow
through a semi-permeable streambed. The model can handle perched streams,
streamflow diversions, springs, recharge from irrigation, and
evapotranspiration from the water table and phreatophytes. A variety of
time-dependent boundary conditions can be simulated.
Remarks:
Stream flow is simulated with the kinematic equations of one-dimensional
open-channel flow. The stream channel is assumed to be rectangular in
cross - section. Diversion of surface water may be included. The model is
based on the Manning's formula to simulate energy loss by channel
friction. Initial conditions are depth and velocity of flow in the
channel; the boundary conditions is a description of discharge throughout
the simulation at the upstream boundary.
IGWMC Key: 5680 Model name.- STF (Soil Transport and Fate Data Base)
Model category: unsaturated flow, solute transport, data base
Authors: Sims, R.C., J.L. Sims, and S.G. Hansen
Current version: 2.0
Release date: 6/91
First released: 1988	IGWMC Check-date: 07/92
Institution of Model Development: Utah State Univ., Civil & Env. Eng.
Dept., Logan, Utah 84322-4110
Code Custodian; Burden, D.S.
U.S. EPA, R.S. Kerr Env. Res. Lab, Ctr. for Subsurface
Modeling Support (CSMoS), Ada, OK 74820
Model Developed for
Docume n t a t i on
Model Testing
Peer Review
Availability
Computer Requirements
Abstract:
general use
user's guide
public domain, compiled (PC) version
IBM PC/AT, 640 Kb RAM, 12.5 Mb disk space, math
coprocessor, CGA/EGA/VGA
STF presents quantitative and qualitative information concerning the
behavior of organic and inorganic chemicals in soil environments. It
consists of three major components: {1) the STF data base,- the Vadose Zone
Interactive Processes, model (VIP; see IGWMC Key # 5681) ,- and (3) the
Regulatory and Investigative Treatment Zone model (RITZ; see IGWMC Key
# 6620! . It also includes the VIP and RITZ model data editors. The STF
database is divided in seven files: (1) identification; references; (3)
chemical characterization; (4) immobilization; (5)
transformation/degradation; (6) toxicity; and (7) bioconcentration.
Approximately 400 chemicals are included. The immobilization file includes
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information concerning partitioning, immobility, and transport of the
chemicals in various soils.
IGWMC Key: 5681 Model name: VIP (Vadose zone Interactive Processes
model)
Model category: unsaturated flow, solute transport, vapor flow/transport
Authors: Stevens, D.K., W.J. Grenney, and Z. Yan
Current version: 3.0
Release date: 1991
First released:	IGWMC Check-date: 07/92
Institution of Model Development: Utah State Univ., Civil & Env, Eng.
Dept., Logan, Utah 84322-4110
Code Custodian: Stevens, D.K.
Utah State Univ., Civil and Env. Eng. Dept.
UMC 4110, Logan, UT 84321
Model Developed for: general use
Documentation: theory, user's guide, examples, program structure,
verification
Model Testing: lab. datasets, field datasets
Peer Review: concepts, theory
Availability: public domain, compiled {PC) version
Computer Requirements: IBM PC/AT, 640 Kb RAM, math coprocessor, CGA/EGA/VGA
Abstract:
VIP is an one-dimensional finite-difference solute transport and fate
model for simulating the behavior of organic compounds in the vadose zone
as part of a land treatment system. The model uses advection and
dispersion in the water and air phases,as the dominant transport mechanism
for contaminant and oxygen. Monthly values for recharge rate and soil
moisture conditions are used to calculate an effective water velocity.
Volatilization is represented by mass flux into the air phase and
subsequent advection and dispersion. The model includes first-order
degradation of a contaminant in water, air and soil, and of oxygen. It
uses an implicit technique to calculate the degradation of the contaminant
in the oil phase as well as the oil phase itself, and related oxygen
changes.
Remarks:
The pore velocity in water is calculated by dividing the average
infiltration rate by the water content of the soil as estimated by the
procedure of Clapp and Hornberger.
VIP uses partition coefficients and rate constants to calculate
contaminant concentration in each medium. The model has various output
options including echo of input data, (graphic) profile of initial
condition (constituent concentration in water, oil, air, and soil phases),
and the initial fractions as well as initial oxygen concentration. Other
output options include (graphic) depth-concentration profiles and data
versus time tables. Input preparation facilitates exchange of Lotus 123
and word processed ASCII files.
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IGWMC Key: 5690 Model name: VLEACH (Vadose Zone LEACHing Model}
Model category: solute transport
Authors; Turin, J,, F. Carlsson, M. Sukop and P. Lawson
Current version: 1.1
Release date: 11/91
First released: 1990	IGWMC Check-date: OS/93
Institution of Model Development: CK2M-Hill,
Reading, Calif.
Code Custodian: Lawson, P.
CH2M Hill
2525 Airpark Drive, Reading, CA 96001
Model Developed for:
Documentation:
general use
theory, user's
code listing
Model Testing:
Peer Review;
Availability: public domain.
Computer Requirements:
Abstract:
IBM PC/AT, DOS
CGA/EGA/VGA
guide, examples, program structure.
source code, compiled (PC) version
2.0, 256 Kb RAM, math coprocessor,
VLEACH is a relatively simple one-dimensional finite difference model.
The code can simulate leaching through the vadose zone of a volatile,
sorbed, non-reactive contaminant that displays linear partitioning
behavior. In particular, VLEACH simulates downward liquid-phase
advection, solid-phase sorption, gas diffusion in the vapor phase, and
three-phase equilibrium. The contaminant mass within each model cell is
partitioned among liquid (dissolved in water), vapor, and solid phases.
Contaminant may be present in the soil as initial condition, or introduced
at the top boundary as a concentration for recharge. Gas diffusion may
take place at the top and bottom boundaries. Liquid mass flux across the
bottom boundary is calculated. The model assumes a homogeneous porous
medium with steady flow and no dispersion. There is no in-situ
degradation or production, and free product is not present. It can
simultaneously simulate downward leaching in a number of polygons with
different soil properties.
Remarks:
Input data for VLEACH consists of: organic carbon coefficient (Koc>,
Henry's Law constant (Kh), the aqueous solubility and the free air
diffusion coefficient. The input soil properties are dry bulk density,
total porosity, volumetric water content and organic carbon fraction, and
site-specific input parameters such as recharge rate and depth to
groundwater.
IGWMC Key: 5700 Model name: HPS
Model category: solute transport
Authors: Galya, D.P.
Current version:
Release date: 1988
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First released: 1987
IGWMC Check-date: 05/92
Institution of Model Development: ERT
Concord, Mass
Code Custodian: Galya, D.P.
ERT, 696 Virginia Road, Concord, Mass. 01742
Model Developed for: general use
Documentation: theory, user's guide, examples, program structure,
code listing
Model Testing:
Peer Review: concepts, theory, coding
Availability: public domain, source code, compiled {PCS version
Computer requirements: IBM PC/AT, 640 Kb RAM, CGA
Abstract:
The HPS model is a three-dimensional, transient, analytical solution of
the convective-dispersive equation for solute transport in groundwater.
The model incorporates: (1) advection in one dimension with dispersion in
three dimensions, simulation of a horizontal plane source in order to
correctly model transport from landfills and waste pits, (3) the ability
to perform time-varying as well as steady-state predictions for
concentration distribution in three dimensions, (4) simulation of the
source strength as a mass flux input which can vary with time, and (5) the
effects of retardation and degradation.
IGWMC Key: 5710 Model name: AQMODEL
Model category: saturated flow
Authors: O'Neill, G.T.
Current version: 2,11
Release date: 1992
First released: 1990	IGWMC Check-date: 06/93
Institution of Model Development: WeilWare
Davis, Calif.
Code Custodian: O'Neill, G.T.
WellWare, 3160 Woods Circle, Davis, CA 95616
Model Developed for: general use
Documentation: theory, user's guide, examples
Model Testing:
Peer Review:
Availability: proprietary, purchase; compiled (PC, Macintosh)
version
Computer requirements: IBM PC/AT, 640 Kb RAM, CGA, WINDOWS compatible,
requires Surfer graphics software; Macintosh version
requires Spyglass or Delta Graph graphics software
Abstract:
AqModel calculates drawdown, equipotentials (according to the Thiera
formula) and stream functions (following McWhorter and Sunada) for a
steady, uniform flow field, and drawdowns and equipotentials for unsteady
flow fields with the Theis equation. The interactive program handles over
500 wells and can be used to determine capture zones and well head
protection areas. The user can plot flow nets, contour maps of heads and
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other custom graphics using SURFER for IBM PC compatibles and or Spyglass
Transform software for Macintosh. A MS Windows version for IBM PC
compatible microcomputers is also available.
IGWMC Key: 5720 Model name: JDB2D/3D
Model category: saturated flow
Authors: Bredehoeft, J.D.
Current version: 1.1
Release date: 1991
First released: 1991	IGWMC Check-date: 07/94
Institution of Model Development: U.S. Geological Survey, Water Resources
Div., Menlo Park, Calif.
Code Custodian: Bredehoeft, J.D.
U.S. Geological Survey, Branch of Research
345 Middlcfield Road, Menlo Park, CA 94025
Model Developed for: general use, education
Documentation: theory, user's guide, examples, program structure,
code listing, verification
Model Testing: verification
Peer Review: concepts, theory, documentation
Availability: public domain, source code, compiled (PC) version
Computer Requirements: IBM PC/AT, 640 Kb RAM, CGA
Abstract:
JDB2D/3D consists of two fairly simple, easy modifiable general-use
computer programs for solving the 2d and quasi-3D formulation of the
transient ground-water flow equation for (leaky-)confined aquifers. The
governing equations are approximated using central finite differences for
the spatial derivatives together with a block-centered formulation.
Intercell transmissivities are taken as the harmonic mean of adjacent cell
transmissivities. The FD equations are solved using the Strongly Implicit
Procedure (SIP). The model requires a no-flow boundary around the area of
computational interest, and assumes a leaky confining layer, an inactive
source layer above the confining unit and pumping for every cell of
interest. Source functions are used to approximate be1s other than
no-flow. The code solves the equations independent of units, allowing the
user to specify any consistent units.
IGWMC Key: 5730 Model name: AQUAMOD
Model category: saturated flow, geostatistics
Authors: van Tonder, G., and H.J. van Rensburg
Current version:
Release date:
First released:	IGWMC Check-date: 07/92
Institution of Model Development: Dept. of Water Affairs
Pretoria, South Africa
Code Custodian: Van Rensburg, H.J.
Dept. of Water Affairs
Private Bag X313, Pretoria, South Africa
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Model Developed for; research, general use
Documentation: theory, user's guide, examples
Model Testing:
Peer Review:
Availability: proprietary, purchase; source code
Computer requirements: compiler
Abstract:
AQUAMOD is a triangular 2-D finite element confined flow model.
Abstraction rates may be changed at any time. Recharge is input by either
supplying a constant value over the whole of the aquifer or a different
recharge rate at each node. Dirichlet and Neumann boundary conditions can
be handled. Output includes heads at each time step together with Darcian
velocities. The program comes with a number of utilities: 1) GENDRIEH,
which generates a simple triangular finite element mesh with rectangular
sides,* 2 3 TFEM, which generates a triangular finite element mesh from any
given set of points using Delaney triangularization; KRIG, which uses
ordinary or universal kriging to interpolate T and S values and water
levels; and $) Bayes, for Bayes interpolation of water levels.
IGWMC Key: 5731 Model name: DEL-V
Model category: saturated flow, stochastic simulation
Authors: van Tonder, G.
Current version:
Release date:
First released:
and H.J. van Rensburg
IGWMC Check-date: 07/92
Institution of Model Development: Dept. of Water Affairs
Pretoria, South Africa
Code Custodian; Van Rensburg, H.J,
Dept. of Water Affairs
Private Bag X313, Pretoria, South Africa
research, general use
theory, user's guide
source code
Moael Developed for:
Documentation:
Model Testing:
Peer Review:
Availability: proprietary, purchase;
Computer requirements: compiler
Abstract:
DEL-V calculates the recharge of an aquifer with the saturated volume
fluctuation method using a given set of monthly water levels. It uses the
triangular mesh generated by the mesh generator TFEM. Monthly abstraction
rates from boreholes must also be supplied as well as ground water inflow
and outflow points in the aquifer. It gives an estimation of the most
probable mean S-value of the aquifer together with the recharge for any
user-specified monthly time period.
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IGWMC Key: 5732 Model name: MASS
Model category: saturated flow, solute transport
Authors: van Tonder, G,, and H.J. van Rensburg
Current version:
Release date:
First released:	IGWMC Check-date: 07/92
Institution of Model Development: Dept. of Water Affairs
Pretoria, South Africa
Code Custodian: "Van Rensburg, H.J.
Dept. of Water Affairs
Private Bag X313, Pretoria, South Africa
Model Developed for: general use
Documentation: theory, user's guide
Model Testing:
Peer Review:
Availability: proprietary, purchase? source code
Computer requirements: compiler
Abstract:
MASS is a two™dimensional triangular finite element model which solves the
groundwater flow equation for a confined aquifer and the
advective-dispersive solute transport equation for a conservative
contaminant. It includes the program GEMASS, a simple mesh generator
program for MASS.
IGWMC Key: 5750 Model name: SHARP
Model category: saturated flow, fresh/salt water flow
Authors: Essaid, H.I.
Current version: 1.0
Release date: 02/94
First released: 1990	IGWMC Check-date: 07/94
Institution of Model Development: U.S. Geological Survey, Water Resources
Div., Menlo Park, Calif.
Code Custodian: Essaid, H.I.
U.S. Geological Survey, Water Resources Div,
M.S. 421, 345 Middlefield Road, Menlo Park, CA 94025
Model Developed for;
Documentation:
Model Testing:
research, general use
theory, user's guide, examples, program structure,
code listing, verification
verification, lab. datasets
Peer Review: concepts, theory, documentation
Availability: public domain, source code
Computer Requirements: compiler
Abstract:
SHARP is a quasi-three-dimensional, implicit finite difference model for
simulating fresh water and salt water flow separated by a sharp interface
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in layered coastal aquifer systems. The model accommodates multiple
aquifers separated by confining layers, with spatially variable porous
media properties. The uppermost aquifer can be confined, unconfined, or
semi-confined with areally distributed recharge. Temporal variations in
recharge and pumping are accounted for by introducing multiple pumping
periods. The boundary conditions which can be simulated include
prescribed flux boundaries, constant fresh water head and/or constant salt
water head boundaries, and head-dependent flux boundaries in the upper
aquifer. Aquifer properties can be both heterogeneous and anisotropic.
The model can be used for both areal and cross-sectional studies. For
each aquifer the vertically integrated freshwater and saltwater equations
are solved. These two equations are coupled by the boundary condition at
the interface. Leakage between the aquifers is calculated applying
Darcy's law. The resulting system of nonlinear partial differential
equations is discretized using an implicit finite difference scheme. The
discretized system of equations is solved using the strongly implicit
procedure (SIP). The position of the interface tip and toe, within the
discretized finite difference blocks, are tracked using linear
extrapolation of the interface elevations calculated at grid points.
Steady-state results are obtained by running a transient simulation until
it achieves steady-state. The model supports variable grid block lengths
in the x- and y- or z-directions. The model is verified against
experimental and closed-form solutions.
Remarks:
For each aquifer, the vertically integrated fresh water and salt water
flow equations are solved. These equations are coupled by the boundary
condition at the interface. The resulting system of coupled, non-linear
pde's is discretized using an implicit FD scheme. The resulting system
of equations is solved using the strongly implicit procedure (SIP). The
positions of the interface tip and toe in each aquifer are tracked using
linear extrapolation of the interface elevations at grid points. Fresh
water and salt water mass balances are calculated for each aquifer.
IGWMC Key: 5760 Model name: SOIL PHYSICS
Model category: unsaturated flow, solute transport, heat transport,
stochastic simulation
Authors: Campbell, G.S.
Current version:
Release date: 1985
First released: 1985	IGWMC Check-date: 06/92
Institution of Model Development: Washington State Univ., Dept. of
Agronomy and Soils, Pullman, WA 99163
Code Custodian: Campbell, G.S.
Washington State Univ., Dept. of Agronomy and Soils
Pullman, WA 99163
Model Developed for: general use
Documentation: theory, user's guide, examples, program structure,
code listing
Model Testing:
Peer Review: concepts, theory
Availability: proprietary, purchase; source code, compiled (PC)
version
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Computer requirements: IBM PC/AT, DOS 2,1, 640 Kb RAM, CGA
Abstract:
This is a series of mostly analytical programs contained in a textbook
(see references) for calculating various soil-physics characteristics.
The package includes a program for computing oxygen concentrations and
fluxes in a soil profile, soil temperature and heat flux, and correlation,
covariance and semivariance of data. Other programs included are: monte
carlo simulation of hydraulic conductivity, infiltration simulation using
standard matric potential, infiltration with matric flux potential,
two-dimensional water flow simulation with matric flux potential,
simulation of evaporation from a bare-surface soil, simulation of solute
transport with numerical dispersion, and simulation of evapotranspiration
and plant water potential.
IGWMC Key: 5780 Model name: POSSM/MCPOSSM (PCB On-Site Spill Model)
Model category: unsaturated flow, solute transport, stochastic simulation,
multimedia exposure
Authors;
Current version
Release date
First released
2.0
IGWMC Check-date: 07/92
Institution of Model Development: unknown
Code Custodian; Electric Power Software Center
Electric Power Research Inst.
P.O. Box 10412, Palo Alto, CA 94303-9743
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
general use
theory, user's guide, examples
concepts, theory
proprietary, purchase; compiled
IBM PC/AT, 640 Kb RAM, CGA
(PC) version
Abstract:
POSSM (PCB Spill Exposure Assessment Methodology), a computer-based
quantitative framework for estimating general public exposure levels
associated with spills from electric utility equipment. POSSM is a
chemical transport and fate model capable of considering such processes as
volatilization, leaching to ground water and chemical washoff from a land
surface due to runoff/erosion. On-site environmental concentrations can
be estimated with POSSM; off-site concentrations with simple transport and
fate models, PTDIS (for air), RIVLAK (for surface water) and GROUND (for
ground water), all part of the methodology. Also included is EXPOSE, an
exposure model (inhalation, ingestion and dermal contact pathways; contact
based on population distribution and activity). MCPOSSM puts the POSSM
model in a monte carlo framework to estimate uncertainties of chemical
levels associated with spills. GROUND is a modification of EPA's PRZM
model. INPOSSM is an interactive program shell to run POSSM and MCPOSSM.
The shell has on-line help features.
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IGWMC Key: 5790 Model name; MAF (Multiple Aquifer Flow)
Model category: saturated flow
Authors: Roelse,	A., Maas, K.
Current version:
Release date:	1984
First released:	1984
IGWMC Check-date: 12/92
Institution of Model Development: Provincial Dept. for Water Management
Zeeland, Middelburg, The Netherlands
Code Custodians Maas, K.
Provincial Dept. of Water Management Zeeland
P.O. Box 165, 4330 AD Middelburg, The Netherlands
Model Developed for:
Documentation;
Model Testing:
Peer Review:
Availability:
Computer requirements:
general use
theory, user's guide, examples, program structure,
code listing
public domain, source code
compiler
Abstract:
The MAF program includes a number of analytical solutions for ground-water
flow in systems comprising of multiple aquifers. The functions were
derived through application of matrix functions in the superposition of
linear closed-form solutions. Among others, the program includes
generalized functions of De Glee, Mazure, Bosch, Theis, Hantush and
Edelman for n-layer systems.
IGWMC Key: 5810 Model name: FE model for 2D Steady State Flow in
Confined Aquifer
Model category: saturated flow
Authors: Kuniansky, E.L.
Current version:
Release date: 4/89
First released: 1982	IGWMC Check-date: 12/92
Institution of Model Development: U.S. Geological Survey, Water Resources
Div», Austin, Texas
Code Custodian: Kuniansky, E.L.
U.S. Geological Survey, Water Resources Div.
8011 Cameron Road, Bldg. 1, Austin, TX 78753
Model Developed for: general use
Documentation: theory, user's guide, examples, program structure,
code listing, verification
Model Testing: verification
Peer Review: concepts, theory, documentation
Availability: public domain, source code
Computer requirements: compiler
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Abstract:
This model program is a simple finite element model for simulation of
two-dimensional steady-state ground-water flow in heterogeneous,
anisotropic, confined aquifers. Constant head, constant flux, and
head-dependent flux (leakage from pond or partially penetrating stream)
boundary conditions can be specified. The model uses triangular elements.
IGWMC Key; 5820 Model name: MAGNAS
Model category: saturated flow, unsaturated flow, multiphase flow, solute
transport, vapor flow/transport
Authors: Huyakorn, P.S., and J. Kool
Current version:
Release date: 1992
First released:	IGWMC Check-date: 05/93
Institution of Model Development: HydroGeologic, Inc.
Herndon, VA 22070
Code Custodian: Huyakorn, P.S.
HydroGeologic, Inc.
1165 Herndon Parkway, suite 900, Herndon, VA 22070
Model Developed for: general use
Documentation: theory, user's guide, examples, verification
Model Testing: benchmarking (analyt. solutions), field testing,
code intercomparison, lab. datasets
Peer Review: concepts, theory, performance
Availability: proprietary,: license? source code (main frame),
compiled (PC) version
Computer Requirements: Intel B0386 based computer, 4 Mb RAM, CGA {for
concise version); compiler for larger versions and
other platforms
Abstract:
MAGNAS is a multiphase model for air, groundwater, immiscible contaminant
and solute transport based on a Galerkin finite element formulation. The
model simulates 2D and 3D flow of water, NAPL (light or dense), and air in
heterogeneous and anisotropic porous media. MAGNAS may be used to
simulate the flow of air as a fully active phase. Transport calculations
include advection and dispersion in all fluid phases, equilibrium
sorption, volatilization, dissolution, precipitation and first-order
degradation. As subsets of the most general fully-three phase modeling
approach, a variety of simpler flow formulations are available, including
pseudo 3-phase and sharp interface formulations. The model can handle
large contrasts in soil properties and highly nonlinear constitutive
relationships. The model converges well and provides an accurate mass
balance. The fluid flow and solute simulations are performed sequentially
(see remarks).
Remarks:
The solution procedure for MAGNAS and MAGICS incorporates upstream
weighting of nodal values of phase mobilities and storage matrix lumping
for linear rectangular elements. Element matrices are evaluated using
enhanced influence-coefficient algorithms that avoid numerical integration
and take advantage of nodal connectivities. These algorithms produce
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5-point (finite difference) and 9-point {finite element) lattice in 2-D,
and an 11-point (hybrid) lattice in 3-D.
Use of the hybrid approximation in MAGNAS and MAGICS combines the
advantages of the FD and FE techniques (e.g. positive transrnissivity and
insensitivity of the numerical solution to grid orientation) for 3-D
problems. Nonlinearities are treated using a modified Newton-Raphson
procedure with automatic under-relaxation and aggressive time-stepping. A
Picard scheme and single-step steady-state analysis are provided as
options in the single-phase flow formulations. For solute transport
simulations, an upstream-weighted residual FE procedure is used for the
phase-summed equation.
The upstream weighting scheme for the solute transport in MAGNAS and
MAGICS curbs numerical oscillations. Direct banded matrix solvers are
used to solve the matrix systems of 2-D problems. A block-iterative
ORTHOMIN solver is used to solve 3-D problems. All boundary conditions
can be chosen constant in time or variable in time with either continuous
or stepwise changes.
MAGNAS and MAGICS have been verified for a variety of problems by
comparison of its numerical solutions with available analytical solutions
and documented numerical results from several other codes including
HYDRUS, VAM2D, VAM3D, SWANFLOW, and NAPL3D. The code is robust and
designed to solve highly nonlinear field problems involving large
contrasts in soil properties and highly nonlinear situations involving
sharp saturation fronts, and to provide accurate mass balance calculations.
Subsets of the full three-phase model in MAGNAS and MAGICS include
pseudo-three-phase (with passive air phase), two-phase and single phase
flow. Additionally, a sharp-interface areal simulation optioTi is provided
to handle situations where capillary pressure and relative permeability
data is unavailable or a 3-D simulation unwarranted. A wide range of
boundary conditions can be tested including those involving influx and
efflux boundaries, water-table conditions, infiltration or recharge, and
wells.
IGWMC Key. 5821 Model name: MAGICS
Model category; saturated flow, unsaturated flow, multiphase flow, solute
transport, vapor flow/transport
Authors: Huyakorn, P.S.
Current version:
Release date: 1992
First released: 1992	IGWMC Check-date; 07/92
Institution of Model Development: HydroGeologic, Inc.
Herndon, VA 22070
Code Custodian: Huyakorn, P.S.
HydroGeologic. Inc.
1165 Herndon Parkway, suite 900, Herndon, VA 22070
Model Developed for: general use
Documentation: theory, user's guide, examples, program structure,
verification
Model Testing: verification, field datasets, code intercomparison
Peer Review: concepts, theory
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Availability: proprietary, license; source code (main frame),
compiled (PC) version
Computer Requirements: Intel 80386 based, computer, 4 Mb RAM, CGA (for
concise version); compiler for larger versions and
other platforms
Abstract:
MAGICS (Multiphase model for Air, Ground-water, Immiscible Contaminant and
Solute transport) is a Ga.lerkin finite element model for simulation of the
flow of water, nonaqueous phase liquid, and air through porous media in
two or three dimensions, MAGICS may be used to simulate the flow of air
as a fully active phase. The solute transport simulation accounts for
advection and hydrodynamic dispersion in all fluid phases, equilibrium
sorption, volatilization, dissolution, precipitation and first-order
degradation. As subsets of the most general fully three-phase modeling
approach, a variety of simpler flow formulations may be simulated using
the code. The fluid flow and solute transport simulations are performed
sequentially (the code has been replaced by MAGNAS; IGWMC key 5820; see
also remarks for MAGNAS).
IGWMC Key: 5822 Model name: SAFTAP (SAturated Flow and Transport And
Particle tracking!
Model category: saturated flow, solute transport
Authors: Huyakorn, P.S., and T.N. Blandford
Current version:
Release date: 1991
First released: 1991	IGWMC Check-date: 12/92
Institution of Model Development: HydroGeologic, Inc.
Herndon, VA 22070
Code Custodian: Kool, J.
HydroGeologic, Inc.
1165 Herndon Parkway, suite 900, Herndon, VA 22070
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
general use
theory, user's guide, examples
proprietary: license; source code
compiler
Abstract:
SAFTAP simulates saturated groundwater flow and solute transport in 3D.
It is composed of two separate modules: the flow and transport module FTM,
and the particle tracking module PTM. FTM is a finite element code for
multi-aquifer systems with a wide range of aquifer conditions (e.g.,
confined, unconfined or partially confined with storage conversion). It
analyses 3D unconfined flow using a saturated-pseudo unsaturated modeling
approach, allowing the prediction of the water table and flow rates
without characterization of the unsaturated zone. Many types of
steady-state or time-dependent boundary conditions can be used. Transport
mechanisms considered include advection, dispersion, molecular diffusion,
adsorption, and first-order degradation.
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Remarks:
FTM includes various matrix solvers: direct banded, layer successive
over-relaxation, preconditioned-conjugate gradient, and ORTHOMIN
accelerated conjugate gradient solver. The most efficient solver is
automatically selected dependent on the dimensionality of the problem#
The transport equation is approximated using the upstream-weighted
residual finite element method. Various types of time-varying sources and
observation points may be introduced.
PTM performs ID solute transport analysis along a pathline defined through
input of head distribution and interpolation of velocities. It uses the
ID upstream-weighted finite element method and include advection,
longitudinal dispersion, retardation and first-order degradation. PTM's
output can be used by various post-processing software, such as the GRAF
module of the WHPA code for pathline generation..
IGWMC Key: 5840 Model name: FASTCHEM
Model category: saturated flow, unsaturated flow, solute transport,
hydrogeochemica1
Authors; Kincaid, C.T.
Current version: 1.0
Release date: 8/88
First released: 1988	IGWMC Check-date: 06/94
Institution of Model Development: Battelle Pacific Northwest
Laboratories, Environm, Sciences Div.
P.O. Box 999, Richland, WA 99352
Code Custodian: Electric Power Software Center
Electric Power Research Inst.
P.O. Box 10412, Palo Alto, CA 94303-9743
Model Developed for: general use
Documentation: concepts and theory, test results, example problems,
input instructions, code structure
Model Testing: benchmarking (analyt. solutions)
Peer Review: concepts and mathematical framework
Availability: proprietary, license; compiled (PC) version
Computer Requirements: Intel 80386 based computer, 4 Mb RAM, math
coprocessor, CGA
Abstract:
FASTCHEM (Fly Ash and Scrubber sludge Transport and geoCHEmistry Model)
simulates hydrologic and geochemical processes of inorganics in saturated
and unsaturated media. The code contains separate modules for
precipitation/dissolution and adsorption/desorption, solute complexation
reactions, and advection/hydrodynamic dispersion, EFLOW is a finite
element model for steady-state simulation of water movement in either
variably-saturated vertical cross-section or a saturated areal plane. The
hydrologic output from EFLOW is used in the flow path generator ETUBE to
define the quasi two-dimensional pathways for solute movement. The module
ECHEM performs geochemical calculations using Newton-Raphson iteration.
The geohydrochemical transport module EICM uses the Markov method to
simulate advective-dispersive movement of solutes. The coupling of
transport and geochemistry is performed by sequential execution of the
transport and geochemistry routines.
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Remarks:
The database produced by ETUBE contains the spatial distribution of
porosity, moisture content, Darcy velocity and cross-sectional area of
each streamtube. The streamtube defines the volume in which the
advection, dispersion and geochemical reactions with the soil and pore
water occur.
Equilibrium as well as some kinetically controlled reactions have been
included in the geochemistry module ECHEM. The species considered in the
thermodynamic database for assessing the attenuation of contaminants in
geochemical aqueous systems include: silver, aluminum, arsenic, boron,
barium, carbon, calcium, cadmium, chloride, chromium, copper, fluoride,
iron, hydrogen, mercury, potassium, magnesium, manganese, molybdenum,
nitrogen, sodium, nickel, oxygen, phosphate, lead, sulfur, antimony,
selenium, silica, strontium, vanadium, and zinc.
The set of geochemical mass balance equations, subject to mass action
constraints, result in a set of non-linear simultaneous equations which
are solved using a Newton-Raphson iteration technique.
The coupling of transport and geochemistry is performed by the sequential
execution of the Markov transport routine and the geochemical submodel.
During the transport phase, all solutes move according to the transition
probabilities of the Markov matrix. This transport step is followed by an
execution of the geochemistry module to simulate the solution and soil
reactions in each volume element of the streamtube. This sequential
coupling is performed once per time step.
The finite-element hydrologic flow code EFLOW performs a steady-state
simulation of water movement in either a variably-saturated vertical
cross - section or a saturated areal cross-section. The hydrologic output
from EFLOW {pressure or hydraulic head) is used by the flow path generator
module 1TUBE to develop quasi two-dimensional streamtubes to define
pathways for solute movement.
The geohydrochemical transport module EICM uses the Markov method to
simulate the advective-dispersive movement of solutes. The method is
designed to be explicity mass conserving and numerically stable. The
approach permits the use of Fickian as well as non-Fickian descriptions of
dispersion.
The FASTCHEM code is structured in a modular fashion and consists of the
following modules: EFLOW for Groundwater Flow; ETUBE for Flow Path
Generation; ECHEM for Geochemistry; and EICM for Geohydrochemical Coupling.
Users of the FASTCKEM code can join a user's group organized by the
Electric Power Research Institute, Palo Alto, California. The objective
of the group is to provide a means for assembling and distributing
information on FASTCHEM analysis results, applications in response to
regulatory requirements, and innovative modeling approaches. Contact Dave
A. Mcintosh at EPRI, (415) 855-7918.
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IGWMC Key: 5850 Model name: RZWQM (Root Zone Water Quality Model)
Model category: unsaturated flow, solute transport
Authors: DeCourscy, D.6.,	K.W. Rojas, and L.R. Ahu ja
Current version:
Release date: 8/90
First released: 1990	IGWMC Check-date: 08/92
Institution of Model Development: USDA-ARS, Fort Collins, Colorado
Code Custodian: Ahuja, L.R,
USDA/ARS, Hydro-Ecosystems Res, Group
P.O. Box E, Fort Collins, CO 80522
Model Developed for: general use, education
Documentation: user's guide
Model Testing:
Peer Review:
Availability: public domain, source code, compiled {PC) version
Computer Requirements: IBM PC/AT, 640 Kb RAM, CGA
Abstract:
RZWQM is a physically based model simulating the movement of water,
nutrients, and pesticides over and through the root zone at a
representative point in a field. The physical processes included are soil
matrix infiltration, macropore flow, surface runoff, heat flow, potential
evaporation, and transpiration, soil-water redistribution and chemical
transport. Root water uptake, actual evaporation and transpiration, are
calculated in the crop growth section in conjunction with water
redistribution and plant growth. Soil chemical processes include
bicarbonate buffering, dissolution and precipitation of calcium carbonate,
gypsum, and aluminum hydroxide, ion exchange involving bases and aluminum,
and solution chemistry of aluminum hydroxide.
Remarks:
RZWQM also includes various nutrient processes such as decomposition of
organic matter, mineralization, immobilization and deminiralization of
appropriate nitrogen and phosphorus species, and adsorption/desorption of
both species. Pesticide processes the model can handle include
computation of the amount of pesticides reaching the soil surface, and the
amounts absorbed and moving through each soil layer. Dissipitation via
volatilization, photolysis, hydrolysis, biodegradation, oxidation, and
complexation are simulated. These processes may be lumped in a single
process.
Other pesticide related processes simulated in RZWQM are dissipation by
formulation of metabolites (tracked throughout their life time). Either
equilibrium isotherms or kinetic adsorption/desorption processes may be
simulated. The model allows to include certain management practices such
as effects of tillage practices on chemical distribution, soil density,
and macro- and microporosityj fertilizer and pesticide applications;
planting densities; and irrigation and drainage practices.
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IGWMC Key: 5870 Model name: OILEQUIL
Model category: multiphase flow (water, oil, air)
Authors:
Current version:
Release date: 9/88
First released:	IGWMC Check-date: 10/92
Institution of Model Development: Environmental Systems & Technologies,
Inc., Blacksburg, Virginia
Code Custodian: Parker, J.C.
Environmental Systems & Technologies, Inc.
2608 Sheffield Drive, Blacksburg, VA 24060
Model Developed for: general use, education
Documentation: theory, user's guide, examples
Model Testing:
Peer Review:
Availability: proprietary, license; compiled (PC) version
Computer Requirements: IBM PC/AT, 640 Kb RAM, math coprocessor, CGA/EGA
Abstract:
OILEQUIL is an interactive program to calculate vertical distributions of
water, oil and air in a soil profile from fluid levels in an observation
well. Oil transmissivities relevant to the description of area
hydrocarbon spreading may also be computed. The program assumes that
vertical equilibrium pressure exists, that pressure distributions in the
soil are reflected by fluid levels xn a non-pumped observation well, and
that saturation-pressure relations are to be described by nonhysteretic
Brooks-Corey or van Genuchten type models. Trapped hydrocarbon which may
have come occluded within the water phase due to a rising water table and
"residual oil" due to slow gravity drainage and low relative permeability
are not considered in the model.
Remarks:
OILEQUIL uses as input depth from the surface rather than elevations. Up
to five soil layers with different soil properties may be input.
Integrated oil volumes are computed numerically. Oil transrr.issivity is
optionally computed by numerical integration. Water and oil saturations,
oil relative permeability and integrated oil volume from the surface to a
certain depth are written for each user-specified depth to an output file,
along with input data. Graphical output is displayed on the screen.
IGWMC Key: 5880 Model name: HEADCO
Model category: water level conversion
Authors: Spar.e, Jr., F.A., and R.B. Mercer
Current version:
Release date: 10/65
First released: 1985	IGWMC Check-date: 10/92
Institution of Model Development: Rockwell Hanford Operations
P.O. Box 800, Richland, WA 99352
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Code Custodian: Rockwell Hanford Operations
P.O. Box 800, Richland, WA 99352
Model Developed for:
Documentation:
Model Testing:
Peer Review;
Availability:
Computer requirements:
general use
theory, user's guide, examples, program structure,
code listing, verification
field datasets
concepts, theory, documentation
public domain, source code
compiler
Abstract:
HEADCO is a program for converting static water level and pressure
measurements to formation pressure and standard hydraulic head. It
corrects field measurements for the effects of fluid density variation and
selected external stresses. Factors that affect density of the fluid
column m which the measurements are made, include temperature, pressure,
salinity, suspended solids, and multiphase conditions. External stresses
examined include barometric and earth tide fluctuations, and gravitational
acceleration variation. These corrections must be used to properly
account for fluid column density effects, which commonly occur with deep
systems, such as nuclear waste isolation projects and deep well injection
programs.
IGWMC Key: 5890 Model name: 2D-SEEP
Model category: saturated flow, unsaturated flow, heat transport
Authors: Kimura,	H.
Current version:
Release date:	1988
First released:	1988	IGWMC Check-date: 10/92
Institution of Model Development: Dept. of Environm. Safety Research,
Japan Atomic Energy Research Inst.
Tokai Research Establishment,
Tokai-Mura, Naka-gun, Ibaraki- Ken
Code Custodian: unknown
Model Developed for: research, general use
Documentation: theory, user's guide
Model Testing:
Peer Review:
Availability:
Computer Requirements; compiler
Abstract:
2D-SEEP is a Galerkin finite element model for simulation of coupled flow
and heat transport in saturated-unsaturated groundwater systems. It can
handle two-dimensional Cartesian or cylindrical coordinates with
isoparametric elements. Flow and heat transport are coupled through fluid
density and viscosity, and groundwater flow is modeled by single phase
flow governed by Darcy's law. The heat conductive and convective equation
is discretized using an upstream weighting finite element scheme.
Boundary conditions include prescribed hydraulic pressure head, prescribed
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water flux normal to a boundary surface, atmospheric boundary where
relationship between velocity and moisture content is described, prescribed
temperature, and prescribed heat flux normal to the boundary surface.
Remarks:
A three-dimensional version of this flow and heat transport code has been
documented in: Kimura, H,, and S. Muraoka. 1986, The 3D-SEEP Computer
Code User's Manual. JAERI-M 86-091. Japan Atomic Energy Research
Institute.
IGWMC Key: 5891 Model name: MIGSTEM-3D
Model category; saturated flow, unsaturated flow, solute transport
Authors: Ohnuki,	T.
Current version:
Release date:	19 88
First released:	1988	IGWMC Check-date: 10/92
Institution of Model Development: Dept. of Environm. Safety Research,
Japan Atomic Energy Research Inst.
Tokai Research Establishment,
Tokai-Mura, Naka-gun, Ibaraki-Ken
Code Custodian: unknown
Model Developed for:	research, general use
Documentation:	theory, user's guide, examples, verification
Model Testing:	verification
Peer Review:
Availability:
Computer requirements:	compiler
Abstract:
MIGSTEM-3D is a three-dimensional finite difference model for prediction
of radionuclide migration through saturated and unsaturated shallow soil
layers. It includes linear equilibrium adsorption, and first-order
irreversible kinetic and first-order reversible kinetic adsorption models.
IGWMC Key: 5940 Model name: HYPERVENTILATE
Model category: vapor flow/transport
Authors: Johnson, P.C.
Current version: 2.0
Release date: 07/93
First released: 1992	IGWMC Check-date: 06/94
Institution of Model Development: Shell Development
Westhollow Research center, Houston,
Texas 77251
Code Custodian: Johnson, P.C.
Shell Development
Westhollow Research Center, Houston, TX 77251
Model Developed for: general use
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Documentation:
Model Testing;
Peer Review:
Availability: public domain PC version (compiled); proprietary
Macintosh version (compiled)
Computer requirements: Macintosh, HyperCard v.2.0; Intel 80386 based
computer, 4 Mb RAM, VGA, Microsoft Windows 3.0,
Spinaker Plus graphics system
Abstract:
HYPERVENTILATE is an interactive software guidance system for evaluating
the feasibility of using Soil Vapor Extraction at a specific site based on
site and contaminant characteristics. It is designed to 1) identify the
level of site data required to evaluate the SVE system, 2) evaluation soil
permeability test results, 3) approximate the minimum number of extraction
wells likely-to be needed, and 4) provide a rough approximation of the
system's desired and maximum removal rates. HYPERVENTILATE contains a
guidance system based upon recent SVE research. Sensitivity analyses of
model results can be easily performed usin^ the program to assess
uncertainties in site and contaminant characteristics. HYPERVENTILATE has
a preprocessor and uses the Spinnaker Plus system to review graphical
guidance information. The program produces output in tabular and
graphical format.
IGWMC Key: 59S0 Model name; DEEP PERCOLATION MODEL
Model category: soil water budget, aquifer water budget
Authors: Bauer, H.H., and J.J. Vaccaro
Current version:
Release date: 1987
First released: 1987	IGWMC Check-date: 11/92
Institution of Model Development: U.S. Geological Survey, Water Resources
Div,, Tacoma, Washington 98402
Code Custodian: Bauer, H.H.
U.S. Geological Survey, Water Resources Div.
District Office, 1201 Pacific Avenue - suite 600,
Tacoma, Washington 98402
Model Developed for;	general use
Documentation;	theory, user's guide, examples, program structure,
code listing
Model Testing:
Peer Review:	concepts, theory, documentation
Availability:	public domain, source code
Computer requirements:	compxler
Abstract:
The Deep Percolation Model estimates on a daily-basis the long-term
average ground-water recharge from precipitation. It has been developed
to simulate the recharge in large areas with variable weather, soils, and
land uses. The model incorporates areal distribution of precipitation,
potential evapotranspiration, snow accumulation, evaporation and melt,
interception by plant foliage and evaporation of intercepted moisture,
surface runoff, soil moisture accumulation and evaporation, transference
of unused energy, and plant transpiration. The minimum data sets required
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are daily values of precipitation and maximum and minimum air temperature,
soil thickness, and available water capacity, soil texture, and land-use.
IGWMC Key: 5970 Model name: ESTIM
Model category: solute transport, inverse model
Authors: Hills, R.G.
Current version:
Release date: 1987
First released: 1987	IGWMC Check-date: 11/92
Institution of Model Development: Sandia Nat. Lab., Fluid Mech. & Heat
Transfer Div., Albuquerque, New Mexico
Code Custodian: R.G. Hills
New Mexico State University, Albuquerque, New Mexico
Model Developed for: general use
Documentation:
Model Testing:
Peer Review:
Avai1abx1xty: public domain, source code
Computer requirements;
Abstract:
ESTIM is a parameter estimation code for the Ogata and Banks (1961)
solution of the advective-dispersive solute transport equation. The code
calls a forward solver which, evaluates the analytical solution as a
subroutine, and searches for the vector of specified parameters that
minimizes the sum of squares of residuals. The parameters obtained are
velocity (assuming a uniform flow field), (homogeneous) dispersivity, and
boundary condition CO (specified concentration).
IGWMC Key: 5990 Model name: SEEPAGE
Model category: ranking, screening
Authors: Moore, J.S., and S.G. Carpenter
Current version:
Release date: 1991
First released: 1991	IGWMC Check-date: 11/92
Institution of Model Development: USDA, Soil Conservation Service
West Virginia
Code Custodian: unknown
Model Developed for: general use
Documentation:
Model Testing:
Peer Review:
Availability: public domain, source code
Computer Requirements:
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Abstract:
SEEPAGE (System for Early Evaluation of Pollution Potential Groundwater
Environment is a manual ranking procedure to quantitavely screen areas in
the northeastern states with serious groundwater pollution potential from
agricultural management practices. It is a combination of selected
elements of three existing models by Aller (DRASTIC), LeGrand (USGS), and
Wisconsin. The analysis is based on seven factors; 1) distance between
site and point of water use, 2) soil slope, 3) depth to water table, 4}
vadose zone material, 5) aquifer material, 6) soil depth, and 7)
attenuation potential of soil for selected pollutants. There are two
yaf i	esm e ncor!	o ¦F ftT~ itsti f'eiTi +- T"a I" oH cm i Tr* o c	rsr'i o r\ t* /"I i cf ri Vvi ifnrl
X. dL-iliy by d L	U> o t» vJL / wllcf J- wJL L-UiiUcll LluL G. UL bUUiucs CLilvJ. wiltS i. v-»i- vJL J- i3 Li 1 xJ Li i^. fcivj.
(non-point) sotjlitc©s» Sg£ r0rn3.rks fox* computer iniplsrn.0nfccifciori«
Remarksi
SEEPAGE has been computer-implemented by the West-Virginia USDA-SCS using
the GRASS (Geographic Resources Analysis Support System) GIS. This allows
planners to use resulting values with models such as the GOSS sox1
leaching and surface soil loss module of GLEAMS (USDA-ARS, Georgia).
IGWMC Key: 6011 Model name: RWH (RWHC/RWHE/RWHV)
Model category; solute transport
Authors: van der Heijde, P.K.M.
Current version*. 4.3
Release date; 3/92
First released: 1983	IGWMC Check-date: 06/93
Institution of Model Development; Xnternat. Ground Water Modeling Center
Golden, Colorado
Code Custodian; Van der Heijde, P.K.M.
International Ground Water Modeling Center
Colorado School of Mines, Golden, CO 80401
Model Developed for: general use, education
Documentation: theory, user's guide, examples, verification
Model Testing: verification
Peer Review:
Availability: proprietary, purchase; source code (main frame!,
compiled (PC) version
Computer Requirements: IBM PC/AT, DOS 2.0, 640 Kb RAM, math coprocessor;
CGA, EGA and VGA versions
Abstract:
RWH (RWHC/RWHE/RWHV) simulates solute transport in homogeneous isotropic,
confined aquifers. It accounts for regional groundwater flow and the
superposed effects of production and injection wells. The effects of
wells is based on the Theis equation. The transport equation is solved
via the particle-in-a-cell technique for convection and the random walk
technique for dispersion. Options for retardation and first-order decay
are included. The program utilizes screen graphics as the primary output
device. It can be used for both educational purposes and initial
definition of more complex problems.
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IGWMC Key: 6020 Model name: PLUME
Model category; solute transport
Authors: Van der Heijde, P.K.M.
Current version: 2.11
Release date: 7/91
First released: 1983	IGWMC Check-date; 06/93
Institution of Model Development: Internat. Ground Water Modeling Center
Golden, Colorado
Code Custodian: Van der Heijde, P.K.M.
International Ground Water Modeling Center
Colorado School of Mines, Golden, CO B0401
Model Developed for: general use, education
Documentation: theory, user's guide, examples, code listing
Model Testing: verification
Peer Review: concepts, theory
Availability: proprietary, purchase; source code (main frame)
compiled (PC) version
Computer Requirements: IBM PC/AT, DOS 2.0, 256 Kb RAM, CGA
Abstract:
PLUMB is an analytical model to calculate two-dimensional vertically
averaged or three-dimensional concentration distribution in a homogeneous
aquifer with a continuous solute injection in a one-dimensional regional
flow field. It includes the simulation of dispersion, retardation, and
radioactive decay. The source is either a line source at a specified
depth in the three-dimensional version or a vertically averaged area
source of specified width in the two-dimensional version. The source
strength may vary in time. The program uses Simpson's rule of integration
and includes a subroutine to calculate concentration values on a
user-defined grid base. The results are presented in tabular form
directly on screen, or routed to a printer or an external file. Data
input is facilitated by an interactive user-interface.
Remarks:
PLUME is an extensively modified Basic version of the Fortran program
GROUND, developed by Codell et al. (1982; see references)
IGWMC Key: 6022 Model name: THWELLS
Model category: saturated flow
Authors: van der Heijde, P.K.M.
Current version: 3.20
Release date: 4/92
First released: 1982	IGWMC Check-date: 07/94
Institution of Model Development: Internat. Ground Water Modeling Center
Golden, Colorado
Code Custodian: Van der Heijde, P.K.M.
International Ground Water Modeling Center
Colorado School of Mines, Golden, CO 80401
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Model Developed for: research, general use, education
Documentation: theory, user's guide, examples, code listing, .
verification
Model Testing: verification
Peer Review:
Availability; proprietary, purchase; source code, compiled (PC)
version
Computer Requirements: IBM PC/AT, DOS 2.1, 640 Kb RAM, VGA
Abstract:
THWELLS is an analytical model for calculating the drawdown or buildup of
piezometric head due to the combine effect of up to 100 pumping and/or
injection wells. The calculation of total drawdown is based on the Theis
equation or Hantush-Jacob equation for non-steady state flow in an
isotropic, homogeneous confined, leaky confined or unconfined aquifer of
infinite extent. The computed effects of individual wells are
superimposed on a regional, horizontal or sloping ground-water surface.
The model can be used for water-table aquifers for the case where the
calculated drawdowns are less than half the saturated thickness of the
aquifer. Boundary effects can be included through use of image well
theory. This menu-driven program facilitates interactive data entry and
editing. It includes tabular and graphic screen display of results.
Graphic display includes both time-drawdown curves for selected locations
and contour plots for a user-specified time. Data can be entered manually
or from an external file. Results may be saved for postprocessing with a
commercial graphic package.
IGWMC Key: 6023 Model name: GWFLOW
Model category: saturated flow
Authors: van der Heijde, P.K.M.
Current version: 2.01
Release date: 10/91
First released: 1982	IGWMC Check-date: 06/93
Institution of Model Development: Internat. Ground Water Modeling Center
Golden, Colorado
Code Custodian: Van der Heijde, P.K.M.
International Ground Water Modeling Center
Colorado School of Mines, Golden, CO 80401
Model Developed for: research, general use, education
Documentation: theory, user's guide, examples, code listing
Model Testing:
Peer Review:
Availability: proprietary, purchase; source code, compiled (PC)
version
Computer Requirements: IBM PC/AT, DOS 2.1, 256 Kb RAM, CGA
Abstract:
GWFLOW is a menu-driven series of seven simple programs, each containing
an analytical solution to a groundwater flow problem. The modules are; 1)
transient flow in a homogeneous, isotropic confined aquifer with a single
production or injection well; 2) transient flow in a homogeneous,
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isotropic, confined aquifer with a partially penetrating well; 3)
transient flow in a homogeneous, isotropic leaky confined aquifer with a
single production or injection well; 4) steady-state flow in a
homogeneous, isotropic, leaky confined aquifer with a single production or
injection well; 5) transient flow in two mutually leaky homogeneous,
isotropic, confined aquifers with a single production or injection well in
the lower aquifer; 6) transient flow in a homogeneous isotropic,
unconfined aquifer with a circular recharge area; 7) depletion of a fully
penetration stream due to pumping of a fully penetrating production well
in an unconfined aquifer.
IGWMC Key: 6024 Model name: PLUME2D
Model category: solute transport
Authors: Van der Heijde, P.K.M.
Current version: 1.32
Release date: 4/93
First released: 1984	IGWMC Check-date: 06/93
Institution of Model Development: Internat. Ground Water Modeling Center
Golden, Colorado
Code Custodian: Van der Hex^jde, P.K.M.
International Ground Water Modeling Center
Colorado School of Mines, Golden, CO 80401
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
research, general use, education
theory, user's guide, examples, program structure,
code listing, verification
verification
concepts, theory
proprietary, purchase; source code, compiled (PC)
version
IBM PC/AT, DOS 2.1, 256 Kb RAM, CGA
Abstract:
PLUME2D is an analytical model based on closed-form solutions of the
non-conservative solute transport equation for instantaneous and
continuous releases of a tracer in one or more source locations as
presented by Wilson and Miller {1978} , and corrected by Wilson and Miller
(1979). The program uses superposition of solutions for individual
sources to calculate the resulting concentration distribution for a
tracer-pollutant in a homogeneous, confined aquifer with uniform regional
flow. Flow is assumed to be horizontal and parallel to the x-axis of a
user-defined coordinate system. The program evaluates the effects of
solute advection and dispersion in an aquifer with up to 25 fully
penetrating sources. The tracer solute may be subject to retardation and
first-order decay. The well function is calculated using the series
approximation given by Walton (1983), which is based on Abromowitz and
Stegun (1965). The program supports interactive data entry and saves
results to disk for post-processing.
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IGWMC Key: 6025 Model name: THCVFIT
Model category: aquifer test analysis
Authors: van der Heijde, P.K.M.
Current version: 2.0
Release date: 3/92
First released: 1987	IGWMC Check-date: 06/94
Institution of Model Development: Internat. Ground Water Modeling Center
Golden, Colorado
Code Custodian: Van der Heijde, P.K.M.
International Ground Water Modeling Center
Colorado School of Mines, Golden, CO 804 01
Model Developed for: general use, education
Documentation: theory, user's guide, examples, code listing,
verification
Model Testing; verification
Peer Review:
Availability: public domain; source code, compiled (PC) version
Computer Requirements: IBM PC/AT, DOS 2.1, 640 Kb RAM, CGA/EGA
Abstract:
THCVFIT is an interactive program to determine transrr.issivity and storage
coefficient from pumping test data. Thxs model is based on the nonsteady
state Theis equation for radial flow using the Theis curve fitting method.
It replaces traditional curve-fitting by on-screen rendition of the Theis
well function and the field drawdown data. The user then moves the type
curve to fit the displayed field data. The results, transmissivity and
storage coefficient, are displayed on-screen together with site
information.
Remarks:
This program is also enclosed in: Lee, K., and C.W. Fetter. 1994.
Hydrogeology Laboratory Manual. Macmillan Publishing Co., New York.
IGWMC Key: 6030 Model name: AQ/BASIC GWF
Model category: saturated flow
Authors: Verruijt, A.
Current version: 1.2
Release date: 1989
First released: 1979	IGWMC Check-date: 10/90
Institution of Model Development: Technical University Delft
Dept. of Civil Engineering, Stevinweg
1, 2628 CN Delft, The Netherlands
Code Custodian: Verruijt, A.
Technical Univ. Delft, Dept. of Civil Eng.
Stevinweg 1, 2628 CN Delft, The Netherlands
Model Developed for: research, general use, education
Documentation: theory, user's guide, examples
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Model Testing:
Peer Review:
Availability: proprietary, purchase, compiled version only
Computer requirements: IBM PC/AT, DOS 2.1, 256 Kb RAM, CGA
Abstract:
BASIC GWF is a simple finite element model for analysis of plane steady-
or unsteady-state groundwater flow in an isotropic, heterogeneous,
confined or unconfined aquifer. AQ is an updated version facilitating
user-friendly interactive data entry and editing and graphic display of
simulation results.
IGWMC Key: 6064 Model name: RADFLOW
Model category: saturated flow
Authors: Rushton, K.R., S.C. Redshaw, and K.S. Rathod
Current version: 2.0
Release date: 3/94
First released: 1979	IGWMC Check-date: 06/94
Institution of Model Development: Univ. of Birmingham, Dept. of Civil Eng.
Birmingham, United Kingdom
Code Custodian: Rushton, K.R.
Univ. of Birmingham, Dept. of Civil Eng.
P.O. Box 363, Birmingham, BIS 2TT, United Kingdom
Model Developed for: research, general use
Documentation: theory, user's guide, code listing
Model Testing:
Peer Review: concepts, theory
Availability: proprietary, purchase; source code, compiled (PC)
version
Computer Requirements: IBM PC/AT, DOS 2.1, 640 Kb RAM, CGA
Abstract:
RADFLOW is a simple finite difference model for transient radial flow
towards a well in a homogeneous isotropic aquifer. The model allows for
switching from confined to unconfined conditions when water levels are
drawn below the top of the aquifer. The program has a restart capability
facilitating varying pumping schedules. It automatically generates a grid
with a logarithmic expansion factor. It is aimed at assisting in the
design of aquifer tests and to study the effects of partial penetration of
a well. RADFLOW is menu-driven and facilitates interactive data entry.
Results are routed to a text file.
IGWMC Key; 6080 Model name: THEISFIT
Model category: aquifer test analysis
Authors: McElwee, C.D
Current version: 2.01
Release date: 9/91
First released: 1980
IGWMC Check-date: 07/94
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Institution of Model Development: Kansas Geological Survey
University of Kansas, 1930 Avenue A,
Campus West, Lawrence, Kansas 66044
Code Custodian: Van der Heijde, P.K.M. (IGWMC version)
International Ground Water Modeling Center
Colorado School of Mines, Golden, CO 00401
Model Developed for;
Documentation *
Model Testing:
Peer Review:
Availability:
Computer Requirements:
general use, education
theory, user's guide, examples, program structure,
code listing, verification
field datasets
concepts, theory, documentation
public domain, source code, compiled (PC) version
IBM PC/AT, DOS 2.0, 256 Kb RAM, CGA
Abstract:
THEISFIT is a non-graphic, interactive program that calculates the aquifer
parameters of storage coefficient and transmissivity from experimental
aquifer test data. It uses a least squares method to automatically fit a
type curve to pump test data from pumping an isotropic homogeneous
nonleaky confined aquifer {Theis assumptions). The program handles up to
80 observation data pairs. THEISFIT is menu driven and facilitates
interactive data entry or input from an external disk file. Results are
displayed on-screen or can be sent to a printer or external disk file.
Remarks:
This code was originally developed by C.D. McElwee of the Kansas
Geological Survey (1980). The original program was written in FORTRAN IV;
this code is listed in McElwee (1980; see references). This reference
also contains the code for a Theis model. The IGWMC version is written in
Microsoft QuickBASIC and made more user-interactive than the original
program. In testing the BASIC version, the original data from McElwee
were used.
IGWMC Key: 6081 Model name: TSSLEAK
Model category: aquifer test analysis
Authors: Cobb, P.M., C.D. McElwee, and M.A. Butt
Current version: 2.0
Release date: 12/87
First released: 1982	IGWMC Check-date: 07/94
Institution of Model Development: Kansas Geological Survey
University of Kansas, 1930 Avenue A,
Campus West, Lawrence, Kansas 66044
Code Custodian: Van der Heijde, P.K.M. (IGWMC version)
International Ground Water Modeling Center
Colorado School of Mines, Golden, CO 80401
Model Developed for:
Documentation:
Model Testing:
Peer Review:
research, general use
theory, user's gu x de,
field data sets
concepts, theory
examples, code listing
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Availability: public domain, source code, compiled (PC) version
Computer Requirements: IBM PC/AT, DOS 2.0, 256 Kb RAM, CGA; compiler for
other platforms
Abstract:
TSSLEAK is a non-graphic program for automated analysis of pumping test
data for a leaky-confined aquifer. It uses a least - squares fitting
technique to calculate the aquifer parameters of storage coefficient,
transmissivity, leakage coefficient, and aquitard permeability from
experimental pumping test data using the method of Hantush and Jacob. The
program can be used with either metric or U.S. customary units. TSSLEAK
is menu driven and facilitates interactive data entry or input from an
external disk file. The program has tabular and graphical output which
can be displayed on-screen, sent to a printer, or external disk file.
Remarks:
A user-interactive IBM-PC version of the original Fortran mainframe
version, written in Microsoft Basic by van der Heijde (see references),
has been published by the IGWMC (IGWMC Order # BAS-16).
IGWMC Key: 6082 Model name: VARQ
Model category: aquifer test analysis
Authors: Butt, M.A., and C.D. McElwee
Current version: 1.0
Release date: 4/86
First released: 1984	IGWMC Check-date: 06/92
Institution of Model Development: Kansas Geological Survey
University of Kansas, 1930 Avenue A,
Campus West, Lawrence, Kansas 66044
Code Custodian: McElwee, C.D.
Kansas Geological Survey
University of Kansas, 193 0 Avenue A, Campus West/
Lawrence, Kansas 66044
Model Developed for: research, general use
Documentation: theory, user's guide, examples, code listing
Model Testing: field data sets
Peer Review: concepts, theory
Availability: public domain, source code, compiled (PC) version
Computer Requirements: IBM PC/AT, DOS 2.1, 640 Kb HAM, CGA; compiler for
other platforms
Abstract:
VARQ is a program to calculate aquifer parameters by automatically fitting
pump test data with a Theis-type curve. It evaluates transmissivity and
storage coefficient for a homogeneous, isotropic confined aquifer using a
least - squares procedure. The program allows for variable discharge rates
during the test. As a measure of error, the rms (root-mean-square) error
in drawdown is calculated along with the correlation coefficient between
pumping-test data and theoretically generated data, using the converged
values of transmissivity and storage coefficient.
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Remarks:
The IGWMC version is written in Microsoft QuickBASIC, and is based on the
original FORTRAN version. Various modifications have been made to make
the program more user-friendly. The BASIC version is tested against the
examples provided in the documentation of the FORTRAN version.
IGWMC Key: 6100 Model name; GROUND
Model category: solute transport
Authors: Codell,	R.B., K.T. Key, and G. Whelan
Current version:
Release date:	6/82
First released:	1982	IGWMC Check-date: 12/90
Institution of Model Development: Battelle Pacific Northwest
Laboratories, Environm. Sciences Div,
P.O. Box 999, Richland, WA 99352
Code Custodian: Codell, R.B.
U.S. Nuclear Regulatory Commission, Off. of Nuclear
Reactor Regulation
Washington, DC 20555
Model Developed for: general use
Documentation: theory, user's guide, examples, program structure,
code listing
Model Testing:
Peer Review: concepts, theory, documentation
Availability: public domain, source code
Computer Requirements: compiler
Abstract:
GROUND is an analytical model for calculation of the flux into a river and
the concentration at points downgradient of a source with a single
radioactive contaminant released from a vertical plane. The model is
developed for the limiting case of unidirectional convective transport
with three-dimensional dispersion in an isotropic aquifer. Furthermore,
the model includes first-order decay and linear equilibrium adsorption as
represented by the retardation coefficient. The point concentration model
uses Simpson's rule quadrature of an arbitrary pulse release into a
confined aquifer.
Remarks:
An update of the program is distributed by the IGWMC under the name PLUME
(see IGWMC Key # 6020).
IGWMC Key: 6120 Model name: AT123D
Model category: solute transport
Authors: Yeh, G.T., et al.
Current version: 1.22
Release date: 6/93
First released: 1979	IGWMC Check-date: 06/94
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Institution of Model Development: Oak Ridge Nat. Lab., Environm. Sciences
Div., Oak Ridge, Tennessee 37831
Code Custodian: Yeh, G.T.
Pennsylvania State Univ., Dept. of Civil Eng.
225 Sackett Bldg., University Park, PA 16802
Model Developed for:
'Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
Abstract:
general use, education
theory, user's guide, examples, program structure,
code listing, verification
verification (against other analytical solutions)
concepts, theory, coding, documentation
public domain (some versions); source code, compiled
(PCS
IBM PC/AT, 640 Kb RAM, CGA; compiler for other
platforms
AT123D is a generalized analytical transient, one- two-, and/or
three-dimensional computer code developed for estimating the transport of
chemicals in an isotropic, homogeneous, confined aquifer system with
uniform flow. The model handles various source configurations (including
point source, line source, and areal source) and release characteristics.
The transport mechanisms include advection, longitudinal as well as
horizontal and vertical transverse hydrodynamic dispersion, diffusion,
linear adsorption, and first-order decay/degeneration and chemical losses
to the atmosphere. The model calculates concentration distribution in
space and time using Green's function.
Remarks:
The.IGWMC version of AT123D comes with an IGWMC-prepared shell {PREAT123)
for data input and editing, program execution, and post-processing.
Complete model results are output to a text file, and special files are
created for graphical post-processing with commercial contouring software.
IGWMC Key: 613 0 Model name: PESTAN/PESTRAN
Model category: solute transport
Authors: Enfield, C.G., R.F, Carsel, S.Z. Cohen, T. Phan, et al.
Current version: 4.0
Release date: 8/94
First released: 1982	IGWMC Check-date: 10/94
Institution of Model Development: U.S. EPA, R.S. Kerr Env. Res. Lab.
P.O. Box 1198, Ada, OK 74820
Code Custodian: U.S. EPA/ORD, Center for Subsurface Modeling Support
(CSMoS), R.S. Kerr Env. Res. Lab., P.O. Box 1198,
Ada, OK 74820
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
research, general use
theory, user's guide, examples, verification
verification
concepts, theory
public domain, source code, compiled (PC) version
IBM PC/AT, DOS 2.0, CGA, 640 Kb RAM; compiler for
other platforms
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Abstract:
PESTAN (PESticide Analytical Model) is an interactive analytical model,
used for estimating organic chemical movement through homogeneous
unsaturated soil to the water table. It calculates organic movement based
on a linear isotherm, first-order degradation, and hydrodynanic
dispersion. It requires the following input: solubility, recharge rate,
sorption, saturated water content, degradation, characteristics curve
coefficients, saturated hydraulic conductivity, bulk density, dispersion
coefficient, minimum and maximum depth, and minimum and maximum time*
Furthermore, a maximum of 10 applications of the contaminant can be
applied in a single calculation. For each application, the time of
application in days prior to recharge needs to be given. The model is
based on an analytical solution of the convective dispersive solute
transport equation for single layer homogeneous soils. The program
provides a table of characteristic curve coefficients. Calculated results
include projected water content, pore water velocity, pollutant velocity,
and length of pollutant slug.
IGWMC Key: 6170 Model name: FP
Model category: parameter ID unsaturated flow
Authors: Su, C.,	and R.H, Brooks
Current version:	1.0
Release date:	11/85
First released:	1985	IGWMC Check-date; 06/94
Institution of Model Development: Oregon State Univ., Dept. of Agric, Eng.
Corvallis, OR 97331
Code Custodian: Oregon State Univ., Dept. of Agricultural Eng.
Corvallis, OR 97331
Model Developed for: research, general use
Documentation: theory, user's guide, examples
Model Testing:
Peer Review:
Availability: public domain, source code, compiled (PC) version
Computer Requirements: IBM PC/AT, DOS 2.0, 256 Kb RAM, CGA; compiler for
other platforms
Abstract:
FP is a program to determine the parameters of the retention function (the
soil-water characteristic function) from experimental data. Based upon
the Pearson Type VIII distribution function, a general retention function
which relates the saturation to the capillary pressure in distributed
soils has been formulated. This simple, yet complete function has been
shown to describe the imbibition as well as the drainage branch of the
retention curve. It is defined by four readily assessed parameters that
either have physical significance themselves or may be used to determine
some hydraulic properties of the soil.
Remarks:
With the assumption that the Burdine integrals are adequate, a relative
permeability function has been derived through the substitution of the
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retention function for the integrands in the Burdine Integrals, The
permeability function is expressed xn terms of the incomplete Bets
function ration whose value may be conveniently found in some mathematical
tables.
Two criteria of affinity have been established for porous media. Media
are said to be affine if their corresponding pore-size distribution
parameters are identical. The scaling factor for the external dimension
of the model has been chosen to be the capillary pressure head at the
inflection point of the retention curve, whose value is always finite.
The analysis of the effect of the pore-size distribution parameters upon
the retention, permeability, and diffusivity curves shows that the
parameter governing the downward concavity of the retention curve is as
important as that governing the upward concavity when it comes to
computing the permeability values from the retention data.
A general pore-sized distribution function of soils has been obtained from
the retention function. The derivation of the pore-size distribution
function enables more rigorous examination and further exploration of the
theories concerning water movement in partially saturated soils. In this
respect, an explanation of the phenomenon of air entrapment during
imbibition has been offered through an energy concept based upon the
pore-size distribution function along with the retention function.
IGWMC Key: 6220 Model name: ONE-D
Model category: solute transport
Authors: van Genuchten, M. The., and W.J. Alves
Current version: 1.0
Release date: 7/85
First released: 1982	IGWMC Check-date: 12/92
Institution of Model Development: USDA, U.S. Salinity Laboratory
Riverside, CA 92501
Code Custodian: Van Genuchten. M.Th,
USDA/ARS, U.S. Salinity Laboratory
4500 Glenwood Drive, Riverside, CA 92501
Model Developed for:
Documentation:
Model Testing*.
Peer Review:
Availability:
Computer Requirements:
Abstract:
research, general use
theory, user's guide, examples, code listing
concepts, theory
public domain, source code, compiled
{PC) version
IBM PC/AT, 640 Kb RAM,
platforms
CGA; compiler for other
ONE-D is a package of five analytical solutions to the one-dimensional
convective-dispersive solute transport equation with linear equilibrium
adsorption, zero-order production, and first-order decay in a
semi - infinite homogeneous aquifer with a uniform flow field. The five
solutions are based on different governing equations and boundary
conditions. The governing transport equations include terms accounting
for convection, diffusion, and dispersion, and linear equilibrium
adsorption. In some cases, the effects of zero-order production and
first-order decay have also been taken into account. This package brings
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together the five common analytical solutions of the transport equation.
Remarks:
Knopman (1986; see references) derived parameter sensitivities associated
with the transport of solutes in porous media using the analytical
solutions described by van Genuchten and Alves {1982). These
sensitivities were derived by direct differentiation of the closed-form
solutions, requiring modifications and extensions of the original program
by van Genuchten and Alves. The modified program include output file
options compatible with TELLAGRAF graphics software.
IGWMC Key: 6221 Model name; SWMS-2D
Model category: unsaturated flow, solute transport
Authors: Simunek, J., T. Vogel, and M.Th, van Genuchten
Current version: 1.1.1
Release date: 8/93
First released: 1992	IGWMC Check-date: 07/94
Institution of Model Development: USDA, U.S. Salinity Laboratory
Riverside, CA 92501
Code Custodian: Van Genuchten, M.Th.
USDA/ARS, U.S. Salinity Laboratory
4500 Glenwood Drive, Riverside, CA 92501
Model Developed for:
Documentation:
research, general use
concepts and theory, test results, model setup,
input instructions, example problems
laboratory data sets, code intercomparison
concepts, mathematical framework, performance
Availability: public domain, source code, compiled (PC) version
Computer requirements: IBM PC/AT, 640 Kb RAM, CGA, 2 Mb disk space, DOS
3.0; compiler for other platforms
Abstract:
Model Testing:
Peer Review:
SWMS-2D is a numerical model for simulating water and solute movement in
variably saturated porous media. The program solves the Richard's
equation for saturated-unsaturated water flow and the advective-dispersive
transport equation for solute transport. The flow equation incorporates a
sink term to account for water uptake by plant roots. The transport
equation includes terms for linear equilibrium adsorption, zero-order
production and first-order degradation. The program may be used to
analyze water and solute movement in unsaturated, partially saturated, or
fully saturated porous media. SWMS_2D can handle flow regions delineated
by irregular boundaries. The flow region itself may be composed of
nonuniform soils having an arbitrary degree of local anisotropy. Flow and
transport can occur in the vertical plane, the horizontal plane, or in a
three-dimensional region exhibiting radial symmetry about the vertical
axis. The water flow part of the model can deal with constant or varying
prescribed head and flux boundaries, as well as boundaries controlled by
atmospheric conditions. Soil surface boundary conditions may change from
prescribed flux to prescribed head type conditions and vice versa. The
can also handle a seepage face boundary through which water leaves the
saturated part of the flow domain.
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IGWMC Key: 6224 Model name: SUMATRA-1
Model category: unsaturated flow, solute transport
Authors: van Genuchten, M.Th.
Current version
Release date
First released
1.0
2/86
1978
IGWMC Check-date: 06/94
Institution of Model Development: Water Resources Program, Princeton
University, Dept Civil Eng.,
Princeton, New Jersey
Code Custodian: Van Genuchten, M.Th.
USDA/ARS, U.S. Salinity Laboratory
4500 Glenwood Drive, Riverside, CA 92501
Model Developed for:
Documentation:
Model Testing;
Peer Review;
Availability:
Computer Requirements:
Abstract:
general use
theory, user's guide, examples, program structure,
code listing, verification
verification, lab. datasets, code intercomparison
concepts, theory
public domain, source code, compiled (PC) version
IBM PC/AT, DOS 2.1, 640 Kb RAM, CGA; compiler for
other platforms
SUMATRA-1 is an one-dimensional Hermitian finite element (HFE) model for
simultaneous movement of water and solute in a heterogeneous soil profile.
The transport equation includes the effects of linear adsorption and
zero- and first-order decay. The HFE scheme generates the most accurate
solutions to both moisture and solute fronts, although at the expense of
computational time. However, for extremely dry soils, a regular finite
difference or a linear finite element method with mass lumping should be
used. For flow, the boundary condition both at the top and lower boundary
are either prescribed {time-varying) head or flux. The solute transport
boundary condition at the top is either a time-varying mixed-type or a
first-type; the lower boundary is either zero flux density or prescribed
concentration. Both fairly abrupt layering and smoothly changing soil
profiles can be handled.
IGWMC Key: 6225 Model name: CHAIN
Model category: solute transport
Authors: van Genuchten, M.Th.
Current version:
Release date: 1985
First released: 1982	IGWMC Check-date: 12/90
Institution of Model Development: USDA, U.S. Salinity Laboratory
Riverside, CA 92501
Code Custodian: Van Genuchten, M.Th.
USDA/ARS, U.S. Salinity Laboratory
4500 Glenwood Drive, Riverside, CA 92501
Model Developed for: research, general use
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Documentation:
Model Testing:
Peer Review:
Availability: public domain, source code
Computer requirements: compiler
Abstract:
The CHAIN model simulates multi-ion transport across the unsaturated zone
using an analytical procedure. The model includes longitudinal dispersion
and first-order decay. It calculates the time history of chemical
concentration exiting the unsaturated zone.
IGWMC Key: 6226 Model name: SOHYP
Model category: parameter ID unsaturated flow
Authors: Van Genuchten, M.Th.
Current version: 1.1
Release date: 11/94
First released: 1978	IGWMC Check-date: 12/90
Institution of Model Development: Water Resources Program, Princeton
University, Dept Civil Eng.,
Princeton, New Jersey
Code Custodian: Van Genuchten, M.Th.
USDA/ARS, U.S. Salinity Laboratory
4500 Glenwood Drive, Riverside, CA 92501
Model Developed for: research, general use
Documentation: theory, user's guide
Model Testing:
Peer Review:
Availability: public domain, source code, compiled (PC) version
Computer Requirements: IBM PC/AT, DOS 2.0, 256 Kb RAM, CGA; compiler for
other platforms
Abstract:
SOHYP is an analytical model for calculation of the unsaturated hydraulic
conductivity function using soil moisture retention data. The basis of
SOHYP is a relatively simple equation for soil moisture content-pressure
head curve. The particular form of the equation enables one to derive
closed-form analytical expressions for the relative hydraulic
conductivity, when substituted in the predictive conductivity models of
Burdine or Mualem. The resulting expressions for the hydraulic
conductivity as function of the pressure head contain three independent
parameters which may be obtained by fitting the described soil moisture
retention model to experimental soil moisture retention data. The
solution is based on automatic curve-fitting using a nonlinear least
squares method.
IGWMC Key: 6227 Model name: CFITTM
Model category: tracer test analysis
Authors: van Genuchten, M.Th.
Current version: 1.0
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Release date: 2/81
First released: 1981
IGWMC Check-date: 07/92
Institution of Model Development: USDA, U.S. Salinity Laboratory
Riverside, CA 92501
Code Custodian: Van Genuchten, M.Th.
USDA/ARS, U.S. Salinity Laboratory
4500 Glenwood Drive, Riverside, CA 92501
Model Developed for:
Documentation:
research, general use
theory, user's guide, examples, code listing,
verification
Model Testing: verification, lab. datasets
Peer Review: concepts, theory
Availability: public domain, source code, compiled (PC) version
Computer Requirements:
Abstract:
IBM PC/AT,
platforms
640 Kb RAM, CGA; compiler for other
CFITIM is a program for the estimation of the parameters for
one-dimensional convective-dispersive solute transport in porous media
with steady state flow from continuous or pulse-type tracer experiments
using nonlinear least squares analysis. Curve-fitting is based on the
maximum neighborhood method of Marquardt. Five models for linear
adsorption (both equilibrium and non-equilibrium) are considered,
resulting in five different analytical solutions of the transport
equation. For each of these solutions various boundary conditions can be
specified. The adsorption models considered are: 1) linear equilibrium
adsorption; 2} physical non-equilibrium? 3) physical non-equilxbrium m
the presence of anion exclusion; 4) two-site kinetic non-equilibrium
adsorption; and 5) one-site kinetic non-equilibrium adsorption. Depending
upon the form of the analytical solution, up to five different
dimensionless transport parameters can be estimated.
Remarks:
The five conceptual models considered are: (1) linear equilibrium
adsorption; (2) physical non-equilibrium; (3) physical non-equilibrium in
the presence of anion exclusion; (4) two-site kinetic non-equilibrium
adsorption; and (5) one-site kinetic non-equilibrium adsorption.
IGWMC Key: 6228 Model name: RETC (Retention Curve Computer Code)
Model category: unsaturated flow
Authors: Van Genuchten, M.Th., F.J. Leij, and S.R. Yates
Current version: 1.1
Release date: 11/94
First released: 1991	IGWMC Check-date: 06/93
Institution of Model Development: USDA, U.S. Salinity Laboratory
Riverside, CA 92501
Code Custodian: Van Genuchten, M.Th.
USDA/ARS, U.S. Salinity Laboratory
4500 Glenwood Drive, Riverside, CA 92501
Model Developed for; general use, education
Documentation: theory, user's guide, examples, program structure,
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code listing, verification
Model Testing; verification, lab. datasets, field datasets
Peer Review; concepts, theory, documentation
Availability: public domain, source code, compiled (PC) version
Computer Requirements: IBM PC/AT, 256 Kb RAM, CGA/EGA/VGA
Abstract:
RETC uses theoretical methods to predict the soil water retention curve
and the hydraulic conductivity curve from measured soil water retention
data. It uses several analytical models to estimate water retention,
unsaturated hydraulic conductivity or soil water diffusivity for a given
soil. It includes the parametric equations of Brooks-Corey and van
Genuchten, which are used m conjunction with the theoretical pore-size
distribution models of Mualem and Burdine to predict unsaturated hydraulic
conductivity from observed soil water retention data. RETC can be used in
a forward mode and in a parameter fitting mode. In the forward mode it
estimates the soil-water retention curve and hydraulic conductivity; in
the parameter fitting mode it determines the analytical model parameters.
IGWMC Key: 6229 Model name: HYDRUS/WORM
Model category: unsaturated flow, solute transport
Authors: Kool, J.B., and M.Th. van Genuchten
Current version: 3.4
Release date: 1/92
First released: 1987	IGWMC Check-date: 07/94
Institution'of Model Development:
Salinity Laboratory
CA 92501
USDA, U.S.
Riverside,
Code Custodian: Van Genuchten, M.Th.
USDA/ARS, U.S. Salinity Laboratory
4500 Glenwood Drive, Riverside, CA 92501
Model Developed for:
Documentation:
Model Testing
Peer Review
Availability
Computer requirements
Abstract:
research, general use, education
theory, user's guide, examples, program structure,
code listing, verification
verification, lab. datasets
concepts, theory, documentation
public domain, source code, compiled (PC) version
Intel 80386 based computer, DOS 5.0, 4 Mb RAM, 2 Mb
disk space, math coprocessor, CGA
HYDRUS is a Galerkin linear finite element program for simulation of
transient one-dimensional flow and solute transport in variably saturated
porous media. The solution of the flow problem considers the effects of
root uptake and hysteresis in the soil hydraulic properties. The solute
transport equation incorporates the processes of ionic or molecular
diffusion, hydrodynamic dispersion, linear or nonlinear equilibrium
adsorption, and first-order decay. Boundary conditions for the flow and
transport may be constant or time-varying. For flow boundary conditions,
HYDRUS can solve the steady-state flow equation in a single step without
the need of performing time-marching. The solution of the flow equation
in HYDRUS requires specification of the initial conditions in terms of
pressure head or water content. Either first- or second-type boundary
conditions can be imposed at the soil surface. Alternatively, the upper
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boundary conditions may be specified in terms of total amount of surface
applied water, combining both types of boundary conditions. The auxiliary
condition at the lower boundary is given in terms of imposed pressure
head, zero head gradient, or imposed net drainage flux. The type of
boundary condition can change in time. Soil hydraulic properties in
HYDRDS can be described by the parametric functions of van Genuchten
(1978) . Uptake of water by plant roots includes evapotrar.spiration, a
normalized root uptake distribution function, and a pressure-salinity
stress response function. HYDRDS uses the fully-implicit scheme to solve
the set of matrix equations for flow and transport. Nonlinearities in the
flow equations are treated using Picard iteration with under-relaxation.
For solute transport, corrections are applied to the dispersion
coefficient to reduce numerical problems. The HYDRUS program is a
modification of the WORM program developed at the U.S. Salinity Laboratory.
IGWMC Key; 6250 Model name; WELL
Model category: tracer test analysis
Authors; Gelhar, L.W.
Current version: 1.0
Release date: 1/92
First released: 1982	IGWMC Check-date: 07/94
Institution of Model Development: Massachusetts Inst, of Technology,
Dept. of Civil Eng., Cambridge, MA 02139
Code Custodian: Gelhar, L.W.
Massachusetts Inst, of Technology, Dept. of Civil Eng.
Cambridge, MA 02139
Model Developed for: research, general use
Documentation: theory, user's guide, examples, program structure,
code listing, verification
Model Testing: verification
Peer Review: concepts, theory
Availability: public domain, source code, compiled (PC) version
Computer Requirements: IBM PC/AT, DOS 2.1, 640 Kb RAM, CGA, math
coprocessor; compiler for other platforms
Abstract:
WELL is a program for the analysis of tracer test data. It analyzes
dispersion of a conservative solute introduced as a pulse in the
recharge well of a two-well flow system using the general theory of
longitudinal dispersion in nonuniform flow along streamlines. Thd effects
of transverse dispersion are neglected. The program is based on the
numerical approximation of a closed-form solution of the governing
convective-dispersive equation for transport in a homogeneous aquifer.
Results {longitudinal dispersivity and effective porosity) are presented
in the form of dimension!ess type curves, which can be used for both the
design and analysis of tracer test data. Specifically, these type curves
are used to estimate dispersivity and effective porosity from tracer test
data by curve fitting. The type curves are also useful for designing
tracer tests. Application of the results is illustrated by analyzing the
preliminary tracer test run at boreholes DC - 7/8 on the Hanford Site in
December, 1979.
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IGWMC Key: 6260 Model name: Ground-water Recharge
Model category: saturated flow
Authors: Sunada, D.K., J.W. Warner, and D.J. Molden
Current version:
Release date: 1983
First released: 1983	IGWMC Check-date: 06/92
Institution of Model Development: Colorado State Univ., Dept. Civil Eng.
Fort Collins, CO 80523
Code Custodian: Sunada, D.K.
Colorado State Univ., Dept. of Civil Eng.
Fort Collins, CO 80523
Model Developed for: general use
Documentation:
Model Testing:
Peer Review:
Availability;
Computer requirements: compiler
Abstract:
Interactive analytical model for calculation of artificial recharge of an
infinite, homogeneous water-table acjuxfer from a rectangular recharge
basin and calculation of discharge from basin into stream.
IGWMC Key: 6280 Model name: PESTRUN
Model category: solute transport
Authors: McCall, Jr., E.G., and D.D. Lane
Current version: 1.1
Release date: 1/85
First released: 1985	IGWMC Check-date: 07/94
Institution of Model Development: Univ. of Kansas, Kansas Water Resources
Res. Inst., Lawrence, KS 66045
Code Custodian: Van der Heijde, P.K.M. (IGWMC version)
International Ground Water Modeling Center
Colorado School of Mines, Golden, CO 80401
Model Developed for: general use
Documentation: theory, user's guide, examples
Model Testing:
Peer Review:
Availability
Computer Requirements
public domain, source code, compiled (PC) version
IBM PC/AT, DOS 2.0, 256 Kb RAM, CGA
Abstract:
PESTRUN is a simple pesticide runoff simulation model to approximate
runoff values to identify watersheds which need attention in order to
evaluate effects of different conservation practices. It is based on a
mass balance for a pesticide undergoing sorption, microbial, chemical, and
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photo-degradation; and volatilization. The model also includes mass loss
through soil erosion and surface runoff. The program uses a modified
version of the Universal Soil Loss Equation.
IGWMC Key: 629 0 Model name: DISPER
Model category: solute transport
Authors: Maloszewski, P.
Current version:
Release date: 19 81
First released: 19 81	IGWMC Check-date: 06/92
Institution of Model Development: Institut fur Radiohydrometric
Neuherberg, Germany
Code Custodian: Maloszewski, P.
Inst, for Radiohydromet ry
Ingolstudter Landstrasze 1, 8042 Neuherberg, Germany
Model Developed for: general use
Documentation:
Model Testing:
Peer Review:
Availability:
Coirputer requirements: compiler
Abstract:
An analytical model for calculation of the movement of a pollutant in a
known, one-dimensional, steady-state, saturated flow field.
IGWMC Key: 6300 Model name: THEIS2
Model category: saturated flow
Authors: Koch, D.H.
Current version:
Release date: 1987
First released: 1984	IGWMC Check-date: 07/92
Institution of Model Development: Koch and Associates
Ellicot City, Maryland
Code Custodian: Koch, D.H.
Koch & Associates
2291 Greenway Drive, Ellicot City, MD 21043
Model Developed for
Documentation
Model Testing
Peer Review
Availability
Computer Requirements
general use
theory, user's guide, examples
proprietary, purchase; compiled (PC) version
IBM PC/AT, 640 Kb RAM, CGA
Abstract:
TKEIS2 is a general purpose menu-driven analytical model for simulation
of transient flow in an isotropic, homogeneous confined aquifer with
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multiple wells. The model uses the Theis equation for confined aquifers
and the Jacob modification for unconfined aquifers. The drawdown
resulting from up to 100 wells can be evaluated, both for a single time
anywhere in space, and for as function of time for a single location. The
program includes simple plotting software.
Remarks:
Data preparation for THEIS2 is facilitated by the pre-processor UTIL2.
This program can be used to create image wells and to scale, translate and
rotate production and observation wells¦
Streamline computation using the results of THEIS2 is facilitated by a
special program. This program, which also calculates travel times along a
streamline, is menu-driven and display the results graphically on,screen
or routes it to a plotter.
IGWMC Key: 6301 Model name: LEAKY
Model category: saturated flow
Authors: Koch, D.H.
Current version:
Release date: 19S7
First released: 1984	IGWMC Check-date: 07/92
Institution of Model Development. Koch and Associates
Ellicot City, Maryland
Code Custodian: Koch, D.H,
Koch & Associates
2291 Greenway Drive, Ellicot City, MD 21043
Model Developed for: general use
Documentation: theory, user's guide, examples, program structure,
code listing
Model Testing:
Peer Review:
Availability: proprietary, purchase; source code, compiled (PC)
version
Computer requirements: IBM PC/AT, 640 Kb RAM, CGA
Abstract:
LEAKY is a general purpose menu-driven analytical model for simulation of
transient flow m an isotropic, homogeneous, leaky*"confined aquifer witxi
multiple wells. The program is based on the Hantush-Jacobs solution,
assuming infinite storage in the overlying bed. The program handles up to
100 wells and calculates time-drawdown curves for a single location, or
drawdown in any location for a user-specified time.
IGWMC Key: 6302 Model name: FINITE-Mine Hydrology
Model category: saturated flow
Authors: Koch, D.H.
Current version:
Release date: 19 87
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First released: 1984	IGWMC Check-date; 07/92
Institution of Model Development: Koch and Associates
Ellicot City, Maryland
Code Custodian: Koch, D.H.
Koch & Associates
2291 Greenway Drive, Ellicot City, MD 21043
Model Developed for: general use
Documentation: theory, user's guide, examples, program structure,
code listing
Model Testing:
Peer Review:
Availability: proprietary, purchase; source code, compiled (PC)
version
Computer requirements: IBM PC/AT, 256 Kb RAM, CGA/EGA/VGA
Abstract:
FINITE permits simulation of the inflow to mines, dewatering schemes, the
impact of excavations on groundwater levels, and any other hydrogeologic
situation involving finite length lines of recharge or discharge. The
program is based on an analytical solution by Muskat for steady-state flow
to a finite length sink in an isotropic, homogeneous aquifer. The
menu-driven program extends the solution algorithm to transient problems
using the method of successive steady-states, assuming that the
potentiometric surface has a steady-state curvature at all points in time.
Either confined or unconfined conditions and both constant head and
constant flow sinks may be simulated. The program handles up to 40 finite
length sources or sinks.
IGWMC Key: 6304 Model name: FRACQDAL
Model category: solute transport, fractures
Authors: Koch, D.H.
Current version:
Release date: 19B7
First released: 1984	IGWMC Check-date: 07/92
Institution of Model Development: Koch and Associates
Ellicot City, Maryland
Code Custodian: Koch, D.H.
Koch & Associates
2291 Greenway Drive, Ellicot City, MD 21043
Model Developed for: general use
Documentation: theory, user's guide, examples, program structure,
code listing
Model Testing:
Peer Review:
Availability: proprietary, purchase; compiled (PC) version
Computer requirements: IBM PC/AT, 640 Kb RAM, CGA
Abstract:
FRACQDAL is an analytical model for simulation of the movement of a solute
through a planar fracture in a fractured rock aquifer. The program
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includes advection, molecular diffusion from the fracture into the porous
rock, adsorption and decay. The model is based on the solution of Tang,
Frind, and Sudicky (WRR 17(35, 19813. Time-varying sources of
contamination may be simulated using superposition.
IGWMC Key: 6305 Model name: RADIAL
Model category: saturated flow
Authors: Koch, D.H.
Current version:
Release dates 1987
First released:	IGWMC Check-date: 07/92
Institution of Model Development: Koch and Associates
Ellicot City, Maryland
Code Custodian: Koch, D.H.
Koch & Associates
2291 Greenway Drive, Ellicot City, MD 21043
Model Developed for: general use
Documentation: theory, user's guide, examples, program structure,
code listing
Model Testing:
Peer Review:
Availability: proprietary, purchase; source code, compiled (PC)
version
Computer requirements: IBM PC/AT, 640 Kb RAM, CGA/EGA/VGA
Abstract:
RADIAL is a finite difference model for simulation of three-dimensional
radial ground water flow in a confined aquifer. Simulation of wells with
multiple completions is possible. The different water-bearing strata and
the leakage between them may be accurately simulated. The model includes
capabilities to simulate well casing storage and variable pumping rates.
The finite difference equations are solved using an alternating direction
line successive overrelaxation algorithm.
IGWMC Key: 5310 Model name: LTIRD
Model category: solute transport
Authors: Javandel, I., C. Doughty, and C.F. Tsang
Current version: 1.0
Release date: 2/85
First released: 1985	IGWMC Check-date: 10/90
Institution of Model Development: Lawrence Berkeley Lab., Earth Sc. Div.
Univ. of California, Berkeley, CA 94720
Code Custodian: Javandel, I.
Lawrence Berkeley Lab., Earth Sc. Div.
1 Cyclotron Road, Berkeley, CA 94720
Model Developed for: general use, education
Documentation: theory, user's guide, examples, code listing
Model Testing: verification
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Peer Review: concepts, theory, coding, documentation
Availability: public domain, source code, compiled (PC) version
Computer Requirements: IBM PC/AT, 640 Kb RAM, CGA, math coprocessor;
compiler for other platforms
Abstract:
LTIRD simulates dispersion in a radial flow field, calculating the
dimensionless concentration of a particular solute, injected into an
aquifer, as a function of dimensionless time for different values of
dimensionless radius. It assumes a fully penetrating injection well with
constant injection rate and concentration at source, a homogeneous and
isotropic aquifer of uniform thickness, and zero background concentration.
The evaluation of the analytical solution is based on numerical inversion
of the Laplace transform.
Remarks;
This model is part of the AGU-10 program package distributed by the
International Ground Water Modeling Center. AGU-10 is a program
package based on the American Union's Water Resources Monograph 10
(see references). It consists of five analytical and semi-analytical
solute transport models. The version distributed by the IGWMC
includes two additional preprocessors, for RESSQ and RT, respectively.
IGWMC Key: 6311 Model name: TDAST
Model category: solute transport
Authors; Javandel, I., C. Doughty, and C.F. Tsang
Current version: 1.1
Release date: 11/88
First released: 1983	IGWMC Check-date: 10/90
Institution of Model Development: Lawrence Berkeley Lab,, Earth Sc. Div.
Univ. of California, Berkeley, CA 94720
Code Custodian: Javandel, I.
Lawrence Berkeley Lab., Earth Sc. Div.
1 Cyclotron Road, Berkeley, CA 94720
Model Developed for:
Documentation:
Model Testing:
Peer Review:
general use, education
theory, user's guide, examples, code listing
verification
concepts, theory, coding, documentation
Availability: public domain, source code, compiled (PC) version
Computer Requirements: IBM PC/AT, 640 Kb RAM, CGA, math coprocessor;
compiler for other platforms
Abstract:
TDAST evaluates an analytical solution of the two-dimensional solute
transport equation. The program includes advection, dispersion, decay (at
the source and in the aquifer), and linear equilibrium adsorption. It
calculates C/CO at any point downstream from a finite strip source
(orthogonal to direction of flow) at any specified time. It assumes a
homogeneous, isotropic aquifer of uniform thickness, a uniform flow field,
and zero background concentration.
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Remarks:
TDAST needs an integration subroutine. The original program calls the
subroutine D01BAF which is available from the NAG library. The IGWMC
implementation for IBM PC etc. (version 1.1, 1988) comes with such a
routine.
This model is part of the AGU-10 program package distributed by the
International Ground Water Modeling Center. AGU-10 is a program
package based on the American Union's Water Resources Monograph 10
(see references). It consists of five analytical and semi-analytical
solute transport models. The version distributed by the IGWMC
includes two additional preprocessors, for R1SSQ and RT, respectively.
IGWMC Key: 6312 Model name.- ODAST
Model category* solute transport
Authors: Javandel, I., C. Doughty, and C.F. Tsang
Current version: 1.1
Release date: 11/88
First released: 1985	IGWMC Check-date: 10/90
Institution of Model Development: Lawrence Berkeley Lab., Sarth Sc. Div.
Univ. of California, Berkeley, CA 94720
Code Custodian: Javandel, I.
Lawrence Berkeley Lab., Earth Sc. Div.
1 Cyclotron Road, Berkeley, CA 94720
Model Developed for: general use, education
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
Abstract:
theory, user's guide, examples, code listing
verification
concepts, theory, coding, documentation
public domain, source code, compiled (PC) version
IBM PC/AT, 640 Kb RAM, CGA, math coprocessor;
compiler for other platforms
ODAST evaluates an analytical solution to the one-dimensional
convective-dispersive transport of a nonconservative solute in a
homogeneous, isotropic aquifer with a uniform flow field. The program
includes decay at the solute source and in the aquifer, and linear
equilibrium adsorption. It calculates C/CO at any point downstream from
the contaminant source at any specified time and assumes homogeneous,
isotropic aquifer of uniform thickness, steady-state flow field, and zero
background concentration.
Remarks:
This model is part of the AGU-10 program package distributed by the
International Ground Water Modeling Center. AGU-10 is a program
package based on the American Union's Water Resources Monograph 10
(see references). It consists of five analytical and semi-analytical
solute transport models. The version distributed by the IGWMC
includes two additional preprocessors, for RESSQ and RT, respectively.
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IGWMC Key: 6313 Model name: RT
Model category: solute transport
Authors: Javandel, I., C. Doughty, and C.F. Tsang
Current version
Release date
First released
1.0
2/B5
1985
IGWMC Check-date: 12/90
Institution of Model Development: Lawrence Berkeley Lab., Earth Sc. Div.
Univ. of California, Berkeley, CA 94720
Code Custodian: Javandel, I.
Lawrence Berkeley Lab., Earth Sc. Div.
1 Cyclotron Road, Berkeley, CA 94720
Model Developed for: general use
Documentation: theory, user's guide, examples, code listing
Model Testing: verification
Peer Review: concepts, theory, coding, documentation
Availability: public domain, source code, compiled (PC) version
Computer Requirements: IBM PC/AT, DOS 2.0, 256 Kb RAM, CGA; compiler for
other platforms
Abstract:
RT is a program that converts a time series of concentration data from one
or more observation wells into a spatial concentration distribution m the
aquifer at various times. The model can be used for cases when regional
flow can be neglected and a single fully-penetrating production well
creates a steady-state radial flow field in a homogeneous, isotropic
aquifer.
Remarks:
This model is part of the AGU~10 program package distributed by the
International Ground Water Modeling Center. AGU-10 is a program
package based on the American Union's Water Resources Monograph 10
(see references). It consists of five analytical and semi-analytical
solute transport models. The version distributed by the IGWMC
includes two additional preprocessors, for RESSQ and RT, respectively.
IGWMC has developed the program ART, an interactive pre- and
postprocessor for RT, that allows the user to create a new file or edit an
existing data set, run RT, and graphically display plot options on screen
or route them to a printer (Beljin 1986; see references).
IGWMC Key: 6320 Model name: INFIL1D
Model category: unsaturated flow
Authors: Simmons, C.S., and T.J. McKeon
Current version:
Release date: 1984
First released:	IGWMC Check-date: 11/93
Institution of Model Development: Battelle Pacific Northwest
Laboratories, Environm. Sciences Div.
P.O. Box 999, Richland, WA 99352
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Code Custodian: Simmons, C.S.
Battelle Pacific NW Laboratories
P.O. Box 999, Richland, WA 99352
Model Developed for:	research, general use
Documentation; concepts and theory, user instructions
Model Testing;	laboratory data sets, intercomparison
Peer Review:	concepts, mathematical framework
Availability:	public domain, source code
Computer requirements:	compiler
Abstract:
The program INFIL1D is designed to calculate approximate wetting-front
advance into an unsaturated, uniformly moist, homogeneous soil profile,
under constant surface flux {infiltration) conditions. The code is based
on a quasi-analytical solution of the unsaturated flow equation as derived
by Perroux, Smiles and White (1981). Phillip's (1973) concept of a
flux-concentration relationship for the soil-water content profile was
used to obtain an approximate solution. This method utilizes an assumed
invariant functional relationship between reduced (normalized) flux and
water content. The code uses general hydraulic property data in tabular
form to simulate constant surface flux infiltration. The program uses
numerical integration over the involved water content range. The model is
especially well-suited to check numerical models.
IGWMC Key: 6330 Model name: SOIL
Model category; parameter ID unsaturated flow
Authors: SI-Kadi, A.I.
Current version; 2.0
Release date: 4/87
First released: 1984	IGWMC Check-date: 06/93
Institution of Model Development: Internat. Ground Water Modeling Center
Golden, Colorado
Code Custodian: International Ground Water Modeling Center
Colorado School of Mines, Golden, CO 80401
Model Developed for
Documentation
Model Testing
Peer Review
Av ailability
Computer Requirements
Abstract;
general use
theory, user's guide, examples, code listing
public domain, source code, compiled (PC) version
IBM PC/AT, DOS 2.1, 256 Kb RAM, CGA; compiler for
other platforms
SOIL estimates the parameters of the soil-hydraulic functions. For the
soil-water characteristic function the user can choose from the methods of
Brooks and Corey (1964), Brutsaert (1966), Vauclin et al. (1979), and van
Genuchten (1978). The parameters for the chosen function are obtained
using non-linear least squares analysis. The unsaturated hydraulic
conductivity function is estimated by the series-parallel model of Chiles
and Collis-George (1950) and is obtained by straight line fitting on a
log-log curve. With the derived parameters, the program computes for
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selected pressure values the observed and fitted moisture contents and the
soil hydraulic properties. The results are plotted graphically on screen.
If saturated hydraulic conductivity is unknown the program provides an
estimated value. The menu-driven code requires as input pairs of measured
water content and suction and the saturated water content that corresponds
with zero suction.
IGWMC Key: 6334 Model name; COVAR
Model category: geostatistics
Authors: Williams, S.A.
Current version: 1.1
Release date: 5/94
First released; 1986
and A ¦ I. El- Kadi
IGWMC Check-date: 06/94
Institution of Model Development: Internat. Ground Water Modeling Center
Golden, Colorado
Code Custodian: El-Kadi, A.I.
Univ. of Hawaii-Manoa, Dept. of Geology and Geophysics
2525 Correa Road, Honolulu, HI 96822
general use
theory, user's guide, examples
Model Developed for;
Documentation:
Model Testing:
Peer Review:
Availability: public domain, source code, compiled (PC) version
Computer Requirements:
IBM PC/AT, DOS 2,
other platforms
0, 256 Kb RAM, CGA; compiler for
Abstract;
COVAR is a program for generating two-dimensional fields of autocorrelated
parameters which are log normally distributed {e.g. hydraulic
conductivity). The program uses a technique based on matrix
decomposition. The generated parameter field represents a major
requirement in the stochastic analysis via Monte-Carlo techniques. The
program requires as input a list of x, y coordinates for which the
parameters need to be generated, and statistical parameters describing the
distribution of the hydrologic parameter of interest. The program
facilitates a maximum of 20 X 20 nodes. For larger problems, the program
can be easily modified and recompile. The program can also be easily
modified to be used as a subroutine in a Monte Carlo type two-dimensional
stochastic flow or mass transport model. Program data input is
interactive, with tabular output to a text file.
IGWMC Key: 6350 Model name: WALTON35
Model category: saturated flow, solute transport, heat transport
Authors: Walton,	W.C.
Current version:	1.2
Release date:	05/94
First released:	1984	IGWMC Check-date: 07/94
Institution of Model Development: W.C. Walton
Mahomet, Illinois
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Code Custodian: Van der Heijde, P.K.M. (IGWMC version)
International Ground Water Modeling Center
Colorado School of Mines, Golden, CO 80401
Model Developed for: general use, education
Documentation: theory, user's guide, examples, code listing
Model Testing:
Peer Review:
Availability: public domain; source code, compiled (PC) version
Computer Requirements: IBM PC/AT, 640 Kb RAM, CGA
Abstract:
WALTON35 is a package of 35 simple analytical and numerical programs for
simulating flow, solute transport, heat transport, and fresh-salt water
interface in saturated ground-water systems. The package also contains
some of the widely used mathematical functions, based on polynomial and
numerical approximations. The program contains eight modules and a main
program written in QuickBaseic 4.5 and linked together in a single
executable version. Each mathematical function or ground-water model is
included as a separate subroutine in one of the modules. The programs are
interactive.
IGWMC Key; 6351 Model name: WELFUN/WELLFLO/CONMIG
Model category: saturated flow, solute transport
Authors: Walton, W.C,
Current version:
Release date: 1989
First released: 1989	IGWMC Check-date: 09/90
Institution of Model Development: W.C. Walton
Mahomet, Illinois
Code Custodian: W.C. Walton
c/o Lewis Publishers, Inc., c/o CRC Publishers, Inc.
2000 Corporate Blvd. N.W., Boca Raton, FL 33431
Model Developed for: general use, education
Documentation: theory, user's guide, examples, code listing
Model Testing:
Peer Review: concepts, theory, documentation
Availability; proprietary, purchase; source code, compiled (PC)
version
Computer Requirements: IBM PC/AT, DOS 2.1, 640 Kb RAM, CGA
Abstract:
The programs WELFUN, WELFLO and CONMIG calculate common well function
values and simulate a wide range of groundwater flow and contaminant
migration situations based on analytical solutions. The program options
include: (1) drawdown or recovery due to multiple production and/or
injection wells with variable discharge or recharge rates, drains, and
mines; confined, leaky confined, and water table conditions with barrier
and/or recharge boundaries and discontinuities; and development of
localized contaminant plumes from slug or continuous source areas of
various shape and sizes due to advection, dispersion, retardation caused
by linear adsorption, and radioactive decay.
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Remarks:
The program documentation and a disk with an executable version is
included in the book (see references).
IGWMC Key: 6352 Model name; GWPT
Model category: aquifer test analysis
Authors: Walton,	W.C.
Current version:
Release date:	1987
First released:	1987	IGWMC Check-date: 09/90
Institution of Model Development: W.C. Walton
Ma home t, 111i no x s
Code Custodian; W.C. Walton
c/o Lewis Publishers, Inc., c/o CRC Publishers, Inc.
2000 Corporate Blvd. N.W., Boca Raton, FL 33431
Model Developed for: general use, education
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
theory, user's guide, examples, program structure,
code listing
field datasets
concepts, theory, documentation
proprietary, purchase; compiled
IBM PC/AT, DOS 2.1, 256 Kb RAM,
(PC)
CGA
version
Abstract:
GWPT is a series of analytical groundwater flow programs for use in
aquifer test analysis. It includes models for pumping test design,
semilog time-drawdown or distance-drawdown analysis, storativity analysis
near a stream, stream depletion analysis and drawdown beneath a streambed.
Furthermore, the package includes programs for calculation of the
{confined aquifer) Well function, the partial penetration well function,
the leaky aquifer well function, the well loss coefficient and other
equations.
Remarks:
The program documentation and a disk with an executable version is
included in the book (see references).
IGWMC Key: 6353 Model name: GWFL3D
Model category: saturated flow
Authors: Walton,	W.C.
Current version:
Release date:	1989
First released:	1989	IGWMC Check-date: 09/90
Institution of Model Development: W.C. Walton
Mahomet, Illinois
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Code Custodian: W.C, Walton
c/o Lewis Publishers, Inc., c/o CRC Publishers, Inc.
2000 Corporate Blvd. N.W., Boca Raton, FL 33431
Model Developed for: general use, education
Documentation: theory, user's guide, examples, code listing
Model Testing: verification
Peer Review: concepts, theory, documentation
Availability: proprietary, purchase; source code, compiled (PC)
version
Computer Requirements: IBM PC/AT, DOS 2.1, 640 Kb RAM, CGA, math coprocessor
Abstract:
GWFL3D is a finite difference model for simulation of transient
groundwater flow in multilayered confined, leaky confined and water-table
aquifer systems. The model allows for partially penetrating wells, well
storage capacity, multi-aquifer production wells, flowing wells, mine
excavations, induced infiltration from streams, subsurface drains,
aquitard storativity and delayed gravity yield.
Remarks:
The program documentation and a disk with an executable version is
included in the book (see references).
IGWMC Key: 6354 Model name: GWTR3D
Model category: solute transport
Authors: Walton,	W.C.
Current version:
Release date:	1989
First released:	1989	IGWMC Check-date: 09/90
institution of Model Development; W.C. Walton
Mahomet, Illinois
Code Custodian: W.C. Walton
c/o Lewis Publishers, Inc., c/o CRC Publishers, Inc.
2000 Corporate Blvd. N.W., Boca Raton, FL 33431
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
general use, education
theory, user's guide, examples, program structure,
code listing
verification, code intercomparison
concepts, theory, documentation
proprietary, purchase; source code, compiled (PC)
version
IBM PC/AT, DOS 2.1, 640 Kb RAM, CGA, math coprocessor
Abstract:
GWTR3D is a random walk model for simulation of contaminant transport in a
heterogeneous, anisotropic confined, leaky-confined, or water-table
aquifer. It uses a particle-in-a-cell method to solve for advective
transport and the random walk technique for the dispersion mechanism. The
model requires a pre-calculated or measured head distribution. It can
handle linear adsorption and single-component radio-active decay. It
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allows for a wide variety of source types and source geometry.
Remarks:
GWTR3D does not calculate the head distribution. It requires a file
prepared using an appropriate flow model or gridded field measurements.
The heads might be calculated using the model GWFL3D of the same author
(see IGWMC Key # 6353).
The program documentation and a disk with an executable version is
included in the book (see references) .
IGWMC Key: 6380 Model name: SOLUTE
Model category: solute transport
Authors: Beljin, M.S.
Current version: 3.0
Release date: 06/93
First released: 1985	IGWMC Check-date: 07/94
Institution of Model Development: Internat. Ground Water Modeling Center
Golden, Colorado
Code Custodian: P.K.M. van der Heijde
International Ground Water Modeling Center
Colorado School of Mines, Golden, CO 80401
Model Developed for:
Documen ta t i on;
Model Testing:
Peer Review:
general use, education
theory, user's guide, examples
verification
concepts, theory
Availability: proprietary, purchase,- compiled (PC) version
Computer Requirements: IBM PC/AT, DOS 2.1, 640 Kb RAM, math coprocessor, EGA
Abstract:
SOLUTE is a menu-driven program of five independently run programs based
on analytical solutions of the advective-dispersive transport equation for
a non-conservative tracer solute. Four of the five programs contain the
nine models, the fifth program is a units conversion utility. All of the
SOLUTE programs facilitate interactive data entry and editing, and results
are given in tabular and graphical form. The individual programs are:
ONED-1: one-dimensional solute transport in a semi - infinite
column; constant concentrations as the inlet boundary condition;
retardation and first-order decay included.
ONED-2: one-dimensional solute transport in a semi-infinite column;
constant mass flux as the inlet boundary condition; retardation
included (no decay).
ONED-3: one-dimensional solute transport in a semi - infinite column;
concentration-dependent mass flux as the inlet boundary condition;
retardation and first-order decay options included.
PLUME2D: two-dimensional areal or cross-sectional transport of a plume
in a uniform ground-water flow field caused by one or more
continuous point sources; retardation and first-order decay
included.
SLUG-2D: two-dimensional areal or cross - sectional transport of a slug in
a uniform ground-water flow field caused by one or more
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instantaneous point sources in a uniform ground-water flow field;
retardation and first-order decay included.
PLUME3D: three-dimensional transport of a plume in a uniform ground-water
flow field caused by one or more continuous point sources;
retardation and first-order decay included.
SLUG-3D: three-dimensional transport of a slug in a uniform ground-water
flow field caused by one or more instantaneous point sources;
retardation and first-order decay included.
RADIAL: solute transport in a plane radial flow field; this program
calculates the concentration distribution along the radial
coordinate away from a recharge well; retardation and first
order decay included.
LTiRD: same as RADIAL, but no retardation.
The program produces tabular and graphic output of concentration in time
and space.
IGWMC Key; 6382 Model name: PUMPTEST
Model category; aquifer test analysis
Authors: Beljin, M.S.
Current version; 2.12
Release date; 11/92
First released: 1986	IGWMC Check-date; 07/94
Institution of Model Development: Internat. Ground Water Modeling Center
Golden, Colorado
Code Custodian: P.K.M. van der Heijde
International Ground Water Modeling Center
Colorado School of Mines, Golden, CO 80401
Model Developed for: research, general use, education
Documentation: theory, user's guide, code listing
Model Testing: verification
Peer Review:
Availability: proprietary, purchase; compiled (PC) version
Computer Requirements: IBM PC/AT, DOS 2.0, 256 Kb RAM, CGA
Abstract:
PUMPTEST is an interactive program designed to determine aquifer
parameters by analyzing aquifer test data using a least-squares fitting
procedure. The package includes three different methods to analyze
pumping test data: 1) time-drawdown method 
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IGWMC Key: 6383 Model name: HWELL
Model category: saturated flow
Authors: Beljin, M.S.
Current version;
Release date: 9/91
First released: 1991	IGWMC Check-date: 09/91
Institution of Model Development: Univ. of Cincinnati, Dept. of Civil &
Env. Eng., Cincinnati, OH 45221
Code Custodian: Beljin, M.S.
Univ. of Cincinnati, Dept. of Civil & Env, Eng.
Cincinnati, OH 45221
Model Developed for;
Documentation;
Model Testing:
Peer Review:
Availability:
Computer requirements:
general use
theory, user1
s guide, examples
proprietary, purchase; compiled
IBM PC/AT, DOS 3.0, 640 Kb RAM,
(PC) version
EGA/VGA
Abstract:
HWELL is an interactive analytical model, developed to simulate
steady-state or transient groundwater flow towards a horizontal well in a
confined aquifer. The model can handle different vertical and horizontal
hydraulic conductivities (ar.isotropy) , and includes options for skin
factor and eccentricity of the well. The program also computes drawdown
and specific capacity of a fully penetrating vertical well in the same
aquifer. Performance of the two wells is compared by computing the
specific capacity ratio as a function of screen length, hydraulic
conductivity contrast, aquifer thickness, and other parameters. The
program includes windows, mouse support and graphic output.
IGWMC Key: 6390 Model name: MOUSE
Model category; saturated flow, unsaturated flow, solute transport
Authors; Pacenka, S., and T. Steenhuis
Current version:
Release date: 1984
First released: 1984	IGWMC Check-date: 10/90
Institution of Model Development: Cornell University, Dept. of Agric. Eng.
Ithaca, NY 14853
Code Custodian: Steenhuis, T.
Cornell Univ., Agric. Eng. Dept., Ithaca, NY 14853
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer requirements:
general use, education
theory, user's guide, examples, verification
verification
public domain, compiled (PC) version
IBM PC/AT, DOS 3.1, 640 Kb RAM, VGA
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Abstract:
MOUSE (Method Of Underground Solute Evaluation) ia developed for classroom
and Cooperative Extension Service educational purposes. The model tracks
soluble chemical movement in both the saturated and the unsaturated zone
by coupling ID vertical flow and transport in three-layer soils with 2D
cross - sectional flow and transport in an anisotropic, heterogeneous
aquifer. Surface runoff is calculated using the USDA Soil Conservation
Service curve number equation. Active evapotranspiration occurs in the
top layer of the soil. The finite difference model includes first-order
degradation, dispersion, diffusion and convective mass movement.
Furthermore, the model can handle linear equilibrium adsorption/desorption
isotherms.
IGWMC Key: 6400 Model name: UNSAT, UNSAKY
Model category: unsaturated flow
Authors: Khaleel, R.,
Current version:
Release date: 1/85
First released: 1984
and T-C.J. Yeh
IGWMC Check-date: 03/92
Institution of Model Development: New Mexico Inst, of Mining and
Technology, Dept. of Geosc., Hydrology
Program, Socorro, NM 87801
Code Custodian: Khaleel, R.
New Mexico Inst* of Mining and Technology, Dept.
of
Geoscience, Socorro, NM 87901
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
Abstract:
general use, education
theory, user's guide, examples, program structure,
code listing, verification
verification, lab. datasets, intercomparison
concepts, theory
public domain, source code {see references)
IBM PC/AT, DOS 2.0, 640 Kb RAM, CGA, math
coprocessor; compiler for other platforms
UNSAT is a Galerkin finite element model for solving the one-dimensional,
transient unsaturated flow equation in a homogeneous isotropic soil
profile. It supports constant pressure and flux type boundary conditions,
It estimates the rate of infiltration into soil as well as the moisture
distribution following infiltration. Both differential and cumulative
mass balance errors are given to illustrate accuracy of the numerical
scheme. The model uses a variable time stepping procedure.
IGWMC Key: 6430 Model name: TETRA
Model category: saturated flow
Authors: Abriola, L.M., and G.F. Pinder
Current version: 2.0
Release date: 3/92
First released: 1981	IGWMC Check-date: 06/94
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Institution of Model Development: Princeton Univ., Dept. of Civil Eng.,
Water Resources Program
Princeton, New Jersey 08540
Code Custodian: (IGWMC version)
International Ground Water Modeling Center
Colorado School of Mines, Golden, CO 80401
Model Developed for: general use, education
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
theory, user's guide, code listing
public domain,
IBM PC/AT, DOS
source code, compiled (PC) version
2.1, 256 Kb RAM, CGA
Abstract;
TETRA estimates velocity components in three space dimensions from
hydraulic head data. Groups of four point are connected to form
tetrahedrons, and a linear interpolation is used to calculate head
gradients for each tetrahedron* Application of Darcy's Law yields
velocity components. The program may be used for confined and unconfined
anisotropic or homogeneous aquifers.
Remarks:
TETRA is available from the IGWMC. It is menu-driven, and the input
screens are self explanatory. Results are displayed on the screen or can
be sent to a file or the printer.
IGWMC Key: 6450 Model name: TGUESS
Model category: aquifer test analysis
Authors: Bradbury, K.R. and E.R. Rothchild
Current version: 1.2
Release date: 3/93
First released: 1981	IGWMC Check-date: 06/94
Institution of Model Development: Wisconsin Geological Survey
District Office, 1815 University Ave.,
Madison, Wisconsin 53705
Code Custodian: P.K.M. van der Heijde
International Ground Water Modeling Center
Colorado School of Mines, Golden, CO 80401
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
general use
theory, user's guide, code listing
concepts, theory
public domain, source code, compiled (PC) version
IBM PC/AT, DOS 2.1, 256 Kb RAM, CGA
Abstract:
TGUESS is a program for estimating transmissivity from specific capacity
data. It calculates aquifer transmissivity using the Jacob equation and
uses a correction for partial penetration as given by Sternburg (1973).
It also has a correction for well loss. It has the option to use metric
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or U.S. customary units. Use of U.S. customary units allow the user to
enter the raw data directly from driller's logs. TGUESS can handle up to
50 data sets at one time.
IGWMC Key: 6570 Model name; OPTP/PTEST
Model category: saturated flow, management/optimization
Authors; Paudyal, G.N., and A. Das Gupta
Current version: 1.0
Release date: 10/86
First released: 1966 ' IGWMC Check-date: 07/94
Institution of Model Development: Asian Institute of Technology, Division
of water Resources Eng.
Bangkok, Thailand
Code Custodian: Das Gupta, A.
Asian Institute of Technology, Div. of Water Resources Eng.
P.O. Box 2754, Bangkok 10501, Thailand
Model Developed for: general use
Documentation: theory, user's guide, examples
Model Testing:
Peer Review:
Availability: public domain, source code, compiled {PC} version
Computer Requirements: IBM PC/AT, DOS 2.0, 640 Kb RAM, CGA
Abstract:
OPTP/PTEST is a fully interactive package consisting of two programs for
determining optimal well discharge. PTEST computes the coefficients and
exponent of the nonlinear drawdown equation using data from a
step-drawdown test. OPTP computes the optimal discharge using a
single-variable constrained nonlinear programming algorithm.
IGWMC Key; 6580 Model name: TIMELAG
Model category: aquifer test analysis
Authors: Thompson, D.B.
Current version: 2.0
Release date: 5/94
First released: 1987	IGWMC Check-date: 07/94
Institution of Model Development: SRW Associates, Inc.
Pittsburgh, PA 15205
Code Custodian: Thompson, D.
SRW Associates, Inc.
Robinson Plaza II, Suite 200, Pittsburgh, PA 15205
Model Developed for:	general use
Documentation:	theory, user's guide, examples, code listing
Model Testing:
Peer Review:	concepts, theory
Availability:	public domain, source code, compiled (PC) version
Computer Requirements:	IBM PC/AT, DOS 2.1, 256 Kb RAM, CGA
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Abstract:
TIMELAG is program to estimate hydraulic conductivity from a single-well
aquifer test. The method involves instantaneous raising or lowering of
the water level in a well and measuring the water-level recovery through
time. The method is based on Hvorslev (1951) and more recent extensions.
The method involves fitting a line to reduced field data, using linear
least - squares regression on a semi-log scale. The induced change in water
level must be instantaneous as the derivation of the theoretical basis
requires the head in the aquifer to be constant. The program allows the
standpipe and the well intake to have different radii. The program
facilitates interactive data entry and editing, reading from and writing
to a data file, graphic display and inspection of the observed time-water
level pairs, and writing results to a file for printing and inclusion in
2T€ip03rfcS *
IGWMC Key: 659 0 Model name: B3AVER50FT
Model category: saturated flow, solute transport, fresh/salt water flow
Authors: Bear, J., and A. Verruijt
Current version: 1.1
Release date: 3/92
First released: 1987	IGWMC Check-date: 06/93
Institution of Model Development: Technion, Dept. of Civil Eng.
Technion City, Haifa 32000, Israel
Code Custodian: Bear, J.
Technion, Dept. of Civil Eng.
Technion City, Haifa 32000, Israel
Model Developed for: general use, education
Documentation: theory, user's guide, examples, code listing,
verification
Model Testing: verification
Peer Review: concepts, theory
Availability: proprietary, purchase, source code and compiled (PC)
version
Computer Requirements: IBM PC/AT, DOS 2.1, 640 Kb RAM, CGA
Abstract:
B1AVERS0FT is a package of simple analytical and numerical solutions for
groundwater flow and solute transport. It includes finite difference and
finite element programs for steady and transient two-dimensional areal
flow in recharged heterogeneous aquifers, finite element programs for
cross - sectional flow through dams, streamline generating programs,
analytical and numerical solutions for transport of pollutants by
advection and dispersion, and programs for determining the fresh/salt
water interface. The programs are developed to illustrate principles
discussed in the book "Modeling Groundwater Flow and Pollution" by J. Bear
and A. Verruijt, (D. Reidel Publishing Company, Dordrecht, The
Netherlands).
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IGWMC Key: 6600 Model name: CATTI
Model category: tracer test analysis
Authors: Sauty, J.P., and W. Kinzelbach
Current version: 3.01E
Release date: 4/92
First released: 1988	IGWMC Check-date: 07/94
Institution of Model Development: BRGM Bureau de Recherches, Geologiques
et Minieres, Orleans - France
Code Custodian: Sauty, J.P.
Bureau de Recherches, Geo log x que s et Mmieres
SGN.STO, BP 6009, Orleans-Cedex, France
Model Developed for: general use, education
Documentation: theory, user's guide, examples, verification
Model Testing: verification
Peer Review: concepts, theory
Availability: proprietary, purchase; source code, compiled (PC)
version
Computer Requirements: IBM PC/AT, DOS 2.1, 640 Kb RAM, CGA/EGA, math
coprocessor
Abstract:
CATTI (Computer Aided Tracer Test Interpretation) is a program for the
interpretation of tracer test data. It computes breakthrough curves based
on instantaneous or continuous injection of tracer into a homogeneous
aquifer with either 1D-2D uniform flow or axisymmetric flow for 1 or 2
layers. CATTI allows interactive modification of transport parameters and
immediate visualization of break through curves. The program is also
capable of automatic parameter identification by non-linear least-squares
estimation methods. CATTI is menu driven and allows modification of
transport parameters. Input is from the keyboard, or from external files
prepared during previous CATTI runs. The program output provides
immediate visualization of breakthrough curves via graphic screen output,
and can be saved as a HPG". file.
IGWMC Key: 6601 Model name: EPA-VHS
Model category: solute transport
Authors: Van der Heijde, P.K.M.
Current version: 1.0
Release date: 04/89
First released: 19 89	IGWMC Check-date: 06/94
institution of Model Development: Internat. Ground Water Modeling Center
Golden, Colorado
Code Custodian: Van der Heijde, P.K.M.
International Ground Water Modeling Center
Colorado School of Mines, Golden, CO 80401
Model Developed for: general use
Documentation: theory, user's guide, examples, code listing,
verification
Model Testing: verification
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Peer Review: concepts, theory
Availability: public domain, source code, compiled (PC) version
Computer Requirements: IBM PC/AT, DOS 2.0, 256 Kb RAM, CGA
Abstract:
EPA-VHS (Vertical-Horizontal Spread model) is an analytical solute
transport model to predict maximum concentration of a pollutant at a
prescribed distance downstream from a continuous source (compliance
point). It is based on a solution for the transport of a conservative
constituent in a homogeneous, isotropic aquifer with one-dimensional,
horizontal steady-state flow and dispersion perpendicular to the flow
path. The model assumes zero retardation, a continuous input at maximum
extraction levels, and saturated soil conditions. This program contains
two versions: (1) the original VHS model as published by Domenico and
Palciauskas (19B2), and the modified EPA version as published in the
Federal Register, November 27, 1985. EPA-VHS is menu-driven and
facilitates interactive data entry and editing. The program can be used
with either metric or U.S. customary units. For instructional purposes,
the program contains a set of realistic default values for the input
variables, some of which are adopted by EPA. Results are displayed on
screen in tabular format.
Remarks:
The algorithms used in the program EPA-VHS have been tested by the IGWMC
using the MathCAD (c) mathematical equation solver from MathSoft, Inc.,
Cambridge, Massachusetts. The MathCAD data file is available on request
from the IGWMC US office.
Evaluation of various analytical solutions indicated that transient models
that account for unsaturated zone transport predict higher peak
concentrations than the VHS model. Looney, B. et al. 1987. Analysis of
the Validity of Analytical Models Used for Assessment of Forty-Five Waste
Site Areas: Subsurface Flow and Chemical Transport. In: Proceedings
Solving Ground Water Problems with Models, Denver, Colorado, February
10-12, 1987. Nat. Ground Water Association, Dublin, Ohio.
IGWMC Key: 6603 Model name: ASM (Aquifer Simulation Model)
Model category: saturated flow, solute transport
Authors: Kinzelbach, W., and R. Rausch
Current version: 3.01
Release date: 5/94
First released: 1989	IGWMC Check-date: 07/94
Institution of Model Development: Gesamthochschule Kassel-Universitat
Kassel, Germany
Code Custodian: Kinzelbach, W.
Gesamthochschule Kassel-Universitat
FB 14, Moritzstr. 21, D-3500 Kassel, Germany
Model Developed for*, general use, education
Documentation: theory, user's guide, examples
Model Testing:
Peer Review: concepts, theory, documentation
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Availability; proprietary, purchase; source code, compiled (PC)
version
Computer Requirements: IBM PC/AT, DOS 3.1, 640 Kb RAM, math coprocessor,
CGA/EGA
Abstract:
ASM is a menu- driven numerical model for steady-state or transient
groundwater flow and (uncoupled) solute transport. The two-dimensional
node-centered finite difference equations for {leaky-)confined or
unconfined flow are solved using either the IADI or FCG method. For
computation of pathlines and isochrones, two different schemes of velocity
interpolation are available. These are the scheme by Prickett (Random
Walk) and the scheme by Pollack (MODPATH). Solute transport is simulated
by the random walk method and is based on a steady-state flow field.
Options are available for time-varying pumping and injection rates in
wells, temporally and spatially variable recharge, permanent or
instantaneous solute injection, and infiltration or exfiltration of surface
water. The model also provides a detailed analysis of mass balances. The
model can handle a grid of up to 60 X 60 cells. Although primarily
developed as an educational tool, ASM incorporates many features of more
complex models. It may therefore be used to make initial evaluations of
hyarogeologic problems. It includes various graphic display option to
view the simulation results including head contours, concentrations
distribution, velocity vectors, pathlines, and isochrones. Output
includes heads and concentration files for postprocessing with a
commercial contouring package, and time series for heads and
concentrations in HPGL format.
IGWMC Key; 6604 Model name; PAT
Model category: saturated flow
Authors: Kinzelbach, W., and R. Rausch
Current version: 1.0
Release date: 12/90
First released: 1990	IGWMC Check-date: 07/94
institution of Model Development: Gesamthochschule Kassel-Universitat
Kassel, Germany
Code Custodian: Kinzelbach, W.
Gesamthochschule Kassel-Universitat
FB 14, Moritzstr. 21, D-3500 Kassel, Germany
Model Developed for: general use, education
Documentation: theory, user's guide, examples
Model Testing:
Peer Review:
Availability: proprietary, purchase; source code, compiled (PC)
version
Computer Requirements: IBM PC/AT, DOS 3.1, 640 Kb RAM, EGA/VGA
Abstract:
PAT is an analytical model for the computation and graphical
representation of pathlines and travel times of groundwater in an infinite
or semi-infinite, homogeneous and isotropic confined aquifer or in an
infinite strip of such an aquifer. The computed steady-state flow field
might include arbitrary pumping or injection wells superposed on a natural
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uniform regional flow. The model is screen-oriented and fully interactive.
IGWMC Key: 6605 Model name: AIR
Model category: vapor flow/transport
Authors: Lin, C., and W. Kinzelbach
Current version:
Release date: 1990
First released: 1990	IGWMC Check-date: 01/92
Institution of Model Development: Gesamthochschule Kassel-Universitat
Kassel, Germany
Code Custodian: Kinzelbach, W.
Gesamthochschule Kassel-Universitat
FB 14, Moritzstr. 21, D-3500 Kassel, Germany
Model Developed for: research, general use, education
Documentation: theory, user's guide, examples, verification
Model Testing: verification
Peer Review: concepts, theory
Availability: proprietary, purchase; source code, compiled (PC)
version
Computer requirements: IBM PC/AT, DOS 3.1, 640 Kb RAM, math coprocessor,
EGA/VGA/Hercules
Abstract:
AIR is a user-friendly PC implementation of a three-dimensional finite
difference model of one-phase, steady state gas flow in the unsaturated
zone. It facilitates alternatively the computation of compressible or
incompressible gas flow. The model assumes that the soil moisture
distribution is constant in time and that the free ground-water surface is
an impervious boundary for gas and its location known and fixed in
space/time. The finite difference equations are solved using a
preconditioned conjugate gradient method. Pathlines are computed using
particle tracking in the velocity field and Euler integration. The model
includes options for screen display of pressure distribution contours and
pathlines; it also allows air flux calculations across a user-selected 2-D
plane.
IGWMC Key: 6620 Model name: RITZ (Regulatory and Investigative
Treatment Zone model)
Model category; solute transport
Authors; Nofziger, D.L., J.R. Williams, and T.E. Short
Current version: 2.12
Release date: 3/88
First released: 1988	IGWMC Check-date: 08/92
Institution of Model Development: Oklahoma State Univ., Dept. of Agronomy
Stillwater, OK 74078
Code Custodian: Williams, J.R.
U.S. EPA/ORD, R.S. Kerr Environm. Res. Lab.
Ada, OK 74820
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Model Developed for:
Documentation:
Model Testing:
Peer Review:
research, general use, education
theory, user's guide, examples, verification
verification, lab. datasets, field datasets
concepts, theory, documentation
Availability: public domain, compiled (PC) version
Computer Requirements: IBM PC/AT, DOS 2.1, 256 Kb RAM, C6A, math coprocessor
Abstract:
Regulatory and Investigative Treatment Zone Model (RITZ) is a screening
level model for simulation of unsaturated zone flow and transport of oily
wastes during land treatment. The model considers a constant water flux
and downward movement of the pollutant with the soil solution,
volatilization and loss to the atmosphere, and (bio-)chemical degradation.
The model incorporates the influence of oil upon the transport and fate
of the pollutant, and is based on a series of closed-form analytical
solutions. The treatment site modeled consists of a plow zone and a
treatment zone. The model assumes that waste material is uniformly mixed
in the plow zone, that the oil in the waste material is immobile, and that
the soil properties are uniform from the soil surface to the bottom of the
treatment zone. Furthermore, the flux of water is considered uniform
throughout the treatment site and throughout time, and hydrodynamic
dispersion is insignificant and can be neglected. The partitioning of
pollutant between the liquid, soil, vapor, and oil phases is described by
linear equilibrium isotherms. Degradation of the pollutant and oil is
described as a first-order process. The water content of the soil is
related to the hydraulic conductivity as described by Clapp and
Hornberger. As input the model requires the properties of the chemicals
and oil in the waste'material, the soil properties of the treatment site,
the management practices, and the parameters relevant to the environment
of the site. RITZ is menu-driven and facilitates interactive data entry.
The program produces graphical and tabular output.
Remarks:
Model output: mass balance and function of time (pollutant applied,
leached, volatilized, and degraded) ; location of top/bottom pollutant,-
concentration of pollutant in different phases in time/depth. Most of the
computed variables are represented in the model by a closed-form
(analytical) solution.
IGWMC Key: 6630 Model name: WATERFLO
Model category: unsaturated flow
Authors: Nofziger, D.L.
Current version:
Release date: 1985
First released: 1985	IGWMC Check-date: 08/92
Institution of Model Development: Univ. of Florida
Soil Science Dept., Gainesville, Florida
Code Custodian: Watson, D.
Univ. of Florida, Inst, of Food and Agric. Sc., Software
Support, Building 664, Room 203, Gainesville, FL 32611
Model Developed for: research, general use, education
Documentation: theory, user's guide, examples, verification
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Model Testing: verification, lab. datasets, field datasets
Peer Review: concepts, theory
Availability: proprietary, purchase; compiled (PC) version
Computer Requirements: IBM PC/AT, DOS 2.1, 256 Kb RAM, CGA, math coprocessor
Abstract:
The WATERFLO model is based on a finite difference solution of the
one-dimensional nonlinear Richards equation for simulation of water
movement through homogeneous soils, oriented in any direction. The
interactive program can accommodate finite and semi-finite soil systems.
It provides for the following boundary conditions at the soil surface:
constant potential, constant flux density, rainfall or sprinkler
infiltration rate (water flux density at soil surface as long as soil
surface is unsaturated and constant zero potential when soil surface is
saturated and matric potential is zero), and mixed type (initial flux
density of water till water-potential at surface reaches a user-specified
value and boundary condition becomes a specified potential).
Remarks:
WATERFLO supports two water content functions from Haverkamp (1977), and
one from van Genuchten (1980). The hydraulic conductivity functions are
taken from Haverkamp (1977) and van Genuchten (1980), or indirectly
calculated via the water content functions. The Richard's equation is
solved using an implicit finite difference scheme with explicit
linearization as described in model 3 of Haverkamp (1977) . The program
uses double precision floating point calculations.
IGWMC Key: 6640 Model name: CHEMRANK
Model category: ranking/screening
Authors: Nofziger, D.L., P.S.C. Rao, and A.G. Hornsby
Current version:
Release date: 1988
First released:	IGWMC Check-date: 09/90
Institution of Model Development: Univ. of Florida, Inst, of Food and
Agricultural Sciences, Gainesville, FL
Code Custodian: Dennis Watson
Univ. of Florida, Inst, of Food and Agric. Sc., Software
Support, Building 664, Room 203, Gainesville, FL 32611
Model Developed for: research, general use, education
Documentation: theory, user's guide, examples
Model Testing:
Peer Review:
Availability: proprietary, purchase? compiled (PC) version
Computer requirements: IBM PC/AT, DOS 2.1, 512 Kb RAM, CGA
Abstract:
CHEMRANK is an interactive package which utilizes four ranking schemes
for, screening organic chemicals relative to their potential to leach into
groundwater systems. The schemes are based on rates of chemical movement
or relative rates of mobility and degradation of the chemicals within the
vadose (unsaturated) zone. Two of the ranking schemes use steady state
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groundwater recharge rates, the other two schemes require daily rainfall
and evaporation data. The latter two schemes rank chemical mobility by
travel time in the vadose zone or mass emission of selected chemicals at
some specified depth in the vadose zone.
IGWMC Key: 6650 Model name: GWPATH
Model category: saturated flow
Authors: Shafer,	J.M.
Current version:	4,0
Release date:	1990
First released:	1987
IGWMC Check-date: 10/90
Institution of Model Development: Illinois State Water Survey
Box 232, Urbana, Illinois 61801
Code Custodian: Shafer, J.M.
Univ. of South Carolina
901 Sumter St., Columbia, SC 29208
Model Developed for: general use, education
Documentation: theory, user's guide, examples, program structure,
code listing, verification
Model Testing: verification
Peer Review: concepts, theory, documentation
Availability: proprietary, purchase, compiled (PC) version
Computer requirements: IBM PC/AT, DOS 3.2, 640 Kb RAM, EGA/VGA, math
coprocessor
Abstract:
GWPATH is an interactive microcomputer-based software package for
estimating horizontal or vertical fluid pathlines and traveltimes in fully
saturated ground-water flow domains. The model is applicable to
two-dimensional heterogeneous, anisotropic flow systems, and features
forward and reverse pathline tracking, time-related capture zone analysis,
and multiple pathline capture detection mechanisms. It requires as input
a regular, cell-based distribution of observed or computed hydraulic heads.
IGWMC Key: 6660 Model name: CRACK
Model category: solute transport, fractures
Authors: Sudicky, E.A.
Current version:
Release date: 19 88
First released: 1986	IGWMC Check-date: 10/90
Institution of Model Development: Waterloo Centre for Groundwater Research
University of Waterloo, Waterloo,
Ontario, Canada, n2l 3G1
Code Custodian: McLaren, l.G.
Univ. of Waterloo, Waterloo Centre for Groundwater
Research, Waterloo, Ontario, Canada N2L 3G1
Model Developed for: general use
Documentation: theory, user's guide, examples
Model Testing: verification, lab. datasets, field datasets
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Peer Review: concepts, theory
Availability: proprietary, purchase; compiled (PC) version
Computer Requirements: IBM PC/AT, 640 Kb RAM, CGa
Abstract:
The CRACK microcomputer software package contains four analytical models
for mass transport in fractured porous media. The following models are
included: transport in a single fracture including matrix diffusion with
and without dispersion along fracture axis (models CRACKD and CRACKDO,
respectively); transport in a system of parallel fractures including
matrix diffusion with no dispersion along fracture axis (PCRACKO); and
transport in a single fracture with matrix diffusion and radial diverging
flow (RCRACK). The package includes a plotting routine for concentration
vs. time at different locations or concentration vs. position for
different times (PLOTC).
Remarks:
The programs in the CRACK package are documented in the following
references: CRACKDO and CRACKD -- see Tang et al, 1981; PCRACKO -- see
Sudicky and Frind, 19 82; RCRACK -- see Feenstra et al, 1984.
IGWMC Key: 6670 Model name: AQTESOLV
Model category: aquifer test analysis, porous medium, fractures
Authors: Duffield, G.K.
Current version: 1.1
Release date: 1992
First released: 1990	IGWMC Check-date: 10/94
Institution of Model Development: Geraghty & Miller, Inc. Modeling Group
Reston, Virginia 22091
Code Custodian: Duffield, G.M.
Geraghty & Miller, Inc., Modeling Group
10700 Park Ridge Blvd., Suite 600, Reston, VA 22091
Model Developed for: general use
Documentation: theory, user's guide, examples
Model Testing:
Peer Review:
Availability: proprietary, purchase; compiled (PC) version
Computer Requirements: IBM PC/AT, DOS 3.0, 640 Kb RAM, EGA/VGA color, CGA
b/w
Abstract:
AQTESOLV (AQuifer TEst SOLVer) is a user-friendly software package
designed to assist in the analysis of pumping tests and slug tests.. It
computes and plots type curves for a number of different analytical
solutions. The program allows the user to visually fit a type curve to
time-drawdown data or provides Marquardt non-linear least-squares based
automatic estimation of aquifer properties. The options for constant-rate
pumping tests include: (1) Theis, Cooper-Jacob, and Theis recovery for
confined aquifers,* (23 Papadopulos-Cooper for large diameter wells in
confined aquifers; (3) Hantush for leaky aquifers (with or without storage
in the aquitards) ; {4} Neumar. or Theis and Cooper-Jacob with Jacob's
correction for unconfined aquifers; and (5) Moench for fractured aquifers.
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For slug tests in confined aquifers the program provides the
Cooper-Bredehoeft-Papadopulos method and for unconfined aquifers the
Bouwer-Rice method. Recharge/barrier boundaries are handled using image
wells. Partial penetration can be accounted for using Hantush's
correction.
Remarks:
Version 1.1 has new spreadsheet functions, a large-diameter well solution
for confined and leaky confined aquifer pumping tests, scalable fonts for
screen, printer and plotter displays, and Neuman "type A" and "Type B"
curve generation for visually matching partially penetrating well data.
The 3rd edition of the textbook Applied Hydrogeology by C. W. Fetter
(Mcmillan Publishing Company, 1994) contains a diskette with student
versions of the programs FLOWNET, QUICKFLOW, and AQTESOLV. These versions
are fully operational, but limited in capability.
IGWMC Key: S680 Model name; AQUIX-4S
Model category: aquifer test analysis
Authors: Gilmer,	T,
Current version:	1.1
Release date:	5/93
First released:	1988	IGWMC Check-date: 07/92
Institution of Model Development: Interpex Ltd
715 14th Street, Golden, CO 80401
Code Custodian: Gilmer, T.
EnviroTools Ltd
27203 Armadillo Way, Evergreen, CO 80439
Model Developed for: general use, education
Documentation: theory, user's .guide, examples, verification
Model Testing: verification
Peer Review:
Availability: proprietary, license; compiled (PC) version
Computer requirements: IBM PC/AT, DOS 3.1, 640 Kb RAM, math coprocessor,
CGA/EGA/VGA graphics, 2 Mb disk space
Abstract.»
AQUIX-4S is an interactive, forward and inverse modeling program to aid in
interpreting flow, pumping test and slug test data. The program
calculates aquifer characteristics, such as transmissivity, storage
coefficient, leakage factor, anisotropy and specific yield. In the
forward mode it allows the user to calculate synthetic model curves for
the chosen model. Flow rate or drawdown curve are calculated using the
methods described by Theis (1935), Hantush (I960), Hantush (1964), Neuman
(1975), and Cooper et al. (1967). For the Bouwer and Rice (1976) and
Hvorslev (1951) models, no direct forwards modeling capability exist;
however, the Cooper et al method will create forward models for slug test
scenarios. The solution method of the inverse model is based on a
non-linear least-squares fitting for the Theis, Hantush, Neuman and Cooper
models. The Bouwer and Rice model for an unconfined fully or partially
penetrated aquifer and the Hvorslev models for a well point filter in
uniform soil or at an impervious boundary, use a real-time, interactive
graphical curve fitting approach. The model comes with a sophisticated
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textual and graphic user-interface, data editor and report facilities.
IGWMC Key: 6690 Model name: MODELCAD {Computer-Aided Design for
Ground-Water Modeling)
Model category: pre-/post, processing
Authors: Rumbaugh, J.O., III., and G.M. Duffield
Current version: 1.08
Release date: 1990
First released: 1989	IGWMC Check-date: 05/92
Institution of Model Development: Geraghty & Miller, Inc. Modeling Group
Reston, Virginia 22091
Code Custodian: Rumbaugh III, J.O.
Geraghty & Miller, Inc., Modeling Group
10700 Park Ridge Blvd., Suite 600, Reston, VA 22091
Model Developed for: general use, education
Documentation: theory, user's guide, examples
Model Testing:
Peer Review:
Availability: proprietary, license; compiled (PC) version
Computer requirements: IBM PC/AT, DOS 2.1, 640 Kb RAM, math coprocessor,
EGA/VGA/Hercules; Intel 80386 based computers
(larger version), 4 Mb BAM
Abstract:
MODELCAD is a graphical, model-independent simulation preprocessor. It
facilitates extensive model definition including aquifer properties,
boundary conditions, and designing or altering the grid (rows, columns,
and layers). To relate a model to a specific site, a digitized base map
may be displayed over the model grid. Once completed, the design may be
translated into a functional model data set compatible with several
popular two- and three-dimensional groundwater flow and solute transport
models. It also can be used in a post-processor mode by overlaying
externally generated contour maps of heads or concentration with model
grid and base map.
IGWMC Key: 6700 Model name: MYGRT
Model category: solute transport
Authors: Summers, K.V., S.A. Gherini, M.M. Lang, M.J. Ungs, and others
Current version: 2.0
Release date: 10/89
First released: 1986	IGWMC Check-date: 06/94
Institution of Model Development: Tetra Tech Inc.
Environmental System Engineering, 3746
Mt. Diablo Blvd., Lafayette, CA 94549
Code Custodian: Electric Power Software Center
Electric Power Research Inst.
P.O. Box 10412, Palo Alto, CA 94303-9743
Model Developed for; general use, education
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Documentation: theory, user's guide, examples
Model Testing: verification, lab. datasets, field datasets
Peer Review: concepts, theory, coding, documentation
Availability: proprietary, license; compiled (PC) version
Computer requirements: IBM PC/AT, DOS 2,1, 640 Kb RAM, math coprocessor,
EGA/VGA/Herculus
Abstract:
MYGRT is an interactive, menu-driven microcomputer code to predict the
migration of both inorganic and organic solutes through the saturated
groundwater zone, down.gradxent of sources such as waste dxsposal s x t e s or
spills. The processes included are advection, dispersion, retardation and
decay. The code is based on analytical solutions and can simulate
problems in one or two dimensions using either horizontal or vertical
views. It calculates concentration distribution in space and time. The
code includes various options for tabular and graphic display of the
results.
IGWMC Key: 6701 Model name; CHROMAT
Model category: unsaturated flow, solute transport, hydrogeochemical
Authors:
Current version:	1.1
Release date: 07/92
First released:	1991	IGWMC Check-date: 06/94
Institution of Model Development: Battelle Pacific Northwest
Laboratories, Environm. Sciences Div.
P.O. Box 999, Richland, WA 99352
Code Custodian: Electric Power Software Center
Electric Power Research Inst.
P.O. Box 10412, Palo Alto, CA 94303-9743
Model Developed for: general use
Documentation:
Model Testing:
Peer Review:
Availability.* proprietary, license; compiled (PC) version
Computer Requirements: IBM PC/AT, 640 Kb RAM, math coprocessor, CGA
Abstract:
CHROMAT (CHROMium ATtenuation evaluation model) calculates dissolved Cr
concentration and the amount of Cr attenuated by the soil as Cr-based
leachate migrates through porous soils. The model is based on a
thermodynamic approach to describing the important chemical reactions that
take place in the soil/leachate system. These reactions include aqueous
complexation, oxidation/reduction, precipitation/dissolution, and
adsorption/desorption. CHROMAT comes with a specially developed data
base. The model has the capability to perform automatic sensitivity
analysis, and leachate flow analysis. The equations describing the
chemical equilibrium problem are solved using constraint minimalization of
Gibbs free energy. Input data include a description of leachate
composition, soil characteristics and soil types. Various tabular and
graphic output options are available.
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Remarks:
CHROMAT is a geochemieal equilibrium model with ah extensive chemical
reference set and user guide. It assumes only aqueous speciation and
precipitation/dissolution for Cr(III) as well as aqueous speciation,
precipitation/dissolution, and sorption for Cr(VI). Major data
requirements include the leachate composition and soil characteristics.
Program output includes tabular and graphical output of dissolved and
solid chromium concentrations as well as tabular listings of the
distribution coefficient for chromium.
IGWMC Key; 6702 Model name: VALOR
Model category: multiphase flow (water, air, free product)
Authors: Abriola, L.
Current version: 1.0
Release date: 1/92
First released: 1992	IGWMC Check-date: 06/94
Institution of Model Development: Univ. of Michigan, Dept. of Civil &
Env. Eng., Ann Arbor, MI 48109
Code Custodian: Electric Power Software Center
Electric Power Research Inst.
P.O. Box 10412, Palo Alto, CA 94303-9743
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer requirements:
general use
concepts and theory, installation and input
instructions, test results, and example problems
code xntercomparlson
concepts, mathematical framework, documentation
proprietary, license; compiled (PC) version
Intel 80386 based computer, 2 Mb RAM, CGA, math
coprocessor, mouse, DOS 2.1 or higher
Abstract:
VALOR (Vertical And Lateral Organic Redistribution model) simulates
unsteady two-dimensional flow of an of a light or dense non-aqueous phase
liquid xn the saturated or unsaturated zone. It consxders the vertxcal
and lateral simultaneous migration of water, air and free product and
includes capillarity. The model computes organic saturation distribution
as a function of time. VALOR is a two-dimensional finite-difference
numerical model for cross-sectional or quasi-3D cylindrical model
configurations. The governing equations describe the bulk fluid flow
only, neglecting interphase mass transfer processes such as
volatilization, dissolution and adsorption. Internal transformations
including chemical and biological degradation are also neglected.
Parametric models are employed to estimate three-phase capillary pressure
and relative permeability functions from two-phase data. The two-phase
capillary pressure functions are modified to account for fluid entrapment
and are also assumed to be scalable to fluid interfacial tension. The
flow equations are solved with the implicit pressure - explicit saturation
(IMPES) scheme. The alternating direction implicit algorithm is used to
solve the linear equations.
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IGWMC Key: 6703 Model name: OPTIC
Model category: saturated flow, management/optimization
Authors:
Current version:
Release date: 01/93
First released: 1992	IGWMC Check-date: 06/94
Institution of Model Development: unknown
Code Custodian: Electric Power Software Center
Electric Power Research Inst.
P.O. Box 10412, Palo Alto, CA 94303-9743
Model Developed for: general use
Documentation: code/modules description
Model Testing.
Peer Review:
Availability: proprietary, license; compiled (PC) version
Computer requirements: Intel 80386 based computer, math coprocessor, 2 Mb
RAM, DOS 3.3 or higher, Windows 3.1
Abstract:
OPTIC (Optimal Pumping To Immobilize Contaminants) is a groundwater flow
and contaminant transport code that was developed to help utilities design
the best pumping system for groundwater remediation. It uses an
optimization scheme to determine the most efficient pumping rates and well
locations needed to meet a prescribed plume immobilization goal. OPTIC
can be used to optimize groundwater withdrawal systems required to remove
or immobilize plumes of dissolved contaminants at spill, MGP, and waste
disposal sites. In addition, pumping rates calculated by the model can be
used to determine the quantity of water to be handled by the treatment
system. Assumptions include: negligible diffusion/dispersion and
retardation, and a two-dimensional plume with uniform saturated thickness.
IGWMC Key: 6710 Model name: CMIS (Chemical Movement in Soil)
Model category: unsaturated flow, solute transport
Authors: Nofziger, D.L., and A.G. Hornsby
Current version:
Release date: 8/86
First released: 1986	IGWMC Check-date: 10/90
Institution of Model Development: Univ. of Florida, Florida Coop.
Extension Service, Gainesville, Florida
Code Custodian; Dennis Watson
Univ. of Florida, Inst, of Food and Agric. Sc., Software
Support, Building 664, Room 203, Gainesville, FL 32611
Model Developed for: research, general use, education
Documentation: theory, user's guide, examples, verification
Model Testing: verification, lab. datasets
Peer Review: concepts, theory
Availability:	proprietary, license; compiled (PC) version
Computer Requirements: IBM PC/AT, DOS 2.1, 256 Kb RAM, CGA
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Abstract:
CMIS is a management/educational computer program that provides
qualitative predictions of pesticide fate as function of key soil,
chemical, and climatic variables. The model is based on analytical
solutions. Model assumptions limit it to ncnpolar pesticides (and other
xeno-biotics) moving in sandy soils. Linear adsorption/desorption
isotherms are used to describe chemical affinity to the soil matrix.
Remarks;
An updated and expanded version of CMIS by the -same author is CMLS
(Chemical Movement in Layered Soils)'; Nofziger and Hornsby, 1988 (see
references); also IGWMC Key # 6711.
IGWMC Key: 6711 Model name: CMLS (Chemical Movement in Layered Soils)
Model category: unsaturated flow, solute transport
Authors: Nofziger, D.L., and A.G, Hornsby
Current version:
Release date: 1988
First released: 1988	IGWMC Check-date: 10/90
Institution of Model Development:
Oklahoma State Univ.,
Stillwater, OK 74078
Dept. of Agronomy
Code Custodian:
Dennis Watson
Univ. of Florida,
Inst, of Food and Agric. Sc., Software
Support, Building 664, Room 203, Gainesville, FL 32611
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer Requirements:
research, general use, education
theory, user's guide, examples, verification
verification, lab. datasets
concepts, theory
public domain, compiled (PC) version
IBM PC/AT, DOS 2.0, 640 Kb RAM, CGA/EGA
Abstract:
CMLS is an interactive microcomputer model to be used as a decision aid in
the application of organic chemicals to soils. The model estimates the
location of the peak concentration of non-polar organic chemicals as they
move through a soil in response to the downward movement of water. It
also estimates the relative amount of each chemical still in the soil
profile at any time. The model, which is based on a series of analytical
solutions, can deal with soils with up to 20 layers or horizons, each
having its own partition coefficient and degradation half-life of the
chemical of interest. It is assumed that the chemicals move only in the
liquid phase in response to soil water movement. The amount of water
passing the depth of the chemical is calculated using a water balance for
the zone above the depth of the chemical.
Remarks:
This software is based on a model published by Nofziger and Hornsby (19 86;
see references). That model is an expansion of the model presented by Rao
et Al (1976; see references). It is also an expansion of the CMIS
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(Chemical Movement in Soils) model of Nofziger and Hornsby (1985; see
IGWMC Key # 6710) .
IGWMC Key: 6712 Model name; CHEMFLO
Model category,- unsaturated flow, solute transport
Authors: Nofziger, D.L., K. Rajender, S.K. Nayudu, and P-Y, Su.
Current version: 1.30
Release date: 10/89
First released: 1989	IGWMC Check-date: 06/94
Institution of Model Development: Oklahoma State Univ., Dept. of Agronomy
Stillwater, OK 74078
Code Custodian: Williams, J.R.
U.S. EPA/ORD, R.S. Kerr Environm, Res, Lab.
Ada, OK 74820
Model Developed for: general use, education
Documentation: theory, user's guide, examples
Model Testing;
Peer Review; concepts, theory, documentation
Availability: public domain, compiled (PC) version
Computer Requirements: IBM PC/AT, DOS 2.0, 640 Kb RAM, CGA
Abstract:
CHEMFLO is a one-dimensional screening level model for simulating water
and chemical movement in unsaturated soils. Water movement is modeled
using the Richards equation. Chemical transport is modeled by means of
the convection-dispersion equation, first-order decay in the liquid and
solid phases, zero-order production or decay, and linear equilibrium
adsorption. These equations are solved numerically finite differences.
CHEMFLO handles three types of boundary conditions for flow. At the upper
boundary, the conditions may be: constant potential, constant flux, mixed
type condition, and rainfall. The latter boundary condition is a mixed
type with the given flux equal to the rainfall rate and the given head
equal to zero. For a finite soil system, the conditions at the lower
boundary may be: constant potential, constant flux, or mixed type.
Results of the f1ow model can be displayed m the form of graphs of vjater
content, matric potential, driving force, conductivity, and flux density
of water versus distance or time. Graphs of concentration, and flux
density of chemical as function of distance or time can also be displayed.
Cumulative fluxes of water and chemical and total mass of chemical in the
soil can be displayed as functions of time. CHEMFLO is an expansion and
update of the water movement model WATERFLO by Nofziger (1985) .
Remarks:
CHEMFLO is an extension and update of WATERFLO by Nofziger (1985; see
IGWMC key # 6630). Soil and chemical parameters required by the model
include: soil bulk density, water-soil partition coefficient, diffusion
coefficient of chemical in water, dispersivity, first-order degradation
rates for contaminant in the water and the solid phases, and a zero order
rate constant for the liquid. Other parameters required for solving the
Richards equation are the function relationships for soil-water retention
and unsaturated hydraulic conductivity.
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IGWMC Key: 6730 Model name: TENS0R2D
Model category: saturated flow
Authors: Maslia,	M.L., and R.B. Randolph
Current version:
Release date:	19 81
First released:	1986	IGWMC Check-date: 10/90
Institution of Model Development: U.S. Geological Survey, Water Resources
Div., Federal Center, Denver, CO 80225
Code Custodian: Maslia, M.L.
U.S. Geological Survey, Water Resources
Div., Federal Center, Denver, CO 80225Box 25425,
Lakewood, CO 80225
Model Developed for: research, general use
Documentstion: theory, user1s guide, examples, program structure,
code listing, verification
Model Testing: verification
Peer Review: concepts, theory, documentation
Availability: public domain, source code
Computer requirements: compiler
Abstract:
TENSOR2T) is a program for computing the components of the anisotropic
transmissivity tensor of two-dimensional groundwater flow. To determine
the tensor components using one pumping well and three observation wells,
the type-curve and straight-line approximation methods are used. To
determine the tensor components using more than three observation wells a
weighted least-squares optimization method is used.
IGWMC Key: 6750 Model name: SLAPMAN
Model category: multimedia exposure model, solute transport, vapor
transport
Authors: Steen, A., and R.	Southworth
Current version:
Release date: 9/88
First released: 1988	IGWMC Check-date: 12/90
Institution of Model Development: ICF Technology, Inc.
Code Custodian: Battelle Environmental Program Office
2030 M Street, N.W., 8th Floor, Washington, DC 20036
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer requirements:
general use
user's guide, examples, program structure, code
listing
public domain, source code, compiled (PC) version
IBM PC/AT, DOS 3.0, 512 Kb RAM, CGA
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Abstract:
SLAPMAN is a set of computer programs to calculate a reasonable worst-case
level of human exposure to chemicals leaching from a land application area
for disposal of municipal sewage sludges and being carried downwind by the
atmosphere. The SLAPMAN methodology consists of a series of user-friendly
data manipulation and analytical transport simulation programs. The
transport programs cover the migration of chemical from the application
area through the unsaturated zone, using the analytical model CHAIN, to
the saturated, zone where sorption due to eh/ph differences is simulated.
Results include groundwater concentrations at point of interest,
background concentrations, vapor concentrations and health effects for the
simulated chemicals.
IGWMC Key; 6760 Model name: Computer Simulation Model of Soil Water
Movement and Plant Uptake
Model category: unsaturated flow
Authors: Hayhoe,	H.N., and R. De Jong
Current version:
Release date:	1982
First released:	1982	IGWMC Check-date: 03/92
Institution of Model Development: Agriculture Canada, Agrometeorologv
Section, Land Resource Res. Inst.
Ottawa, Canada K1A 0C6
Code Custodian: De Jong, R.
Agriculture Canada, Land Resource Res. Inst.,
Agrometeorology Section
Ottawa, Canada K1A 0C6
Model Developed for: research, general use
Documentation: theory, program structure, code listing
Model Testing: synth. datasets
Peer Review:
Availability: public domain, source code
Computer Recuxrements: compxler
Abstract:
This program is designed to simulate soil water movement and uptake by
plant roots. Flow is assumed to obey Darcy's law and soil water uptake by
plant roots is accounted for by a volumetric sink term. The Galerkin
finite element model implements one dimensional linear elements and an
implicit time step. Up to four soil layers may be simulated. The soil
water functions are specified by the Clapp and Hornberger (1978)
relationships. The surface boundary condition is determined from daily
precipitation, potential evapotranspiration and a specification of crop
cover. The basal boundary condition can be specified either as a flux or
a soil water concentration. There is an option for specifying water-table
conditions at the lower boundary (see also remark field).
Remarks:
The root sink term is after Feddes et al (1974). The input requirements
include soil description, crop characteristics for each stage, and weather
data {daily precipitation and potential evapotranspiration). A soil water
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suction head function and a hydraulic conductivity function must be
specified for each layer. Crop percentage ground cover and root dry
matter distribution are required. Output include total water in the
profile, plant available water in each layer, estimated suction head, and
conductivity and diffusivity throughout the soil profile.
In addition, the daily and cumulative actual evapotranspiration, actual
transpiration, infiltration of precipitation, and daily flux of water
through the bottom of the profile are output.
IGWMC Key: €780 Model name: STROP/STRCPZ2
Model category: saturated flow, solute transport
Authors:
Current version:
Release date: 1991
First released: 1986	IGWMC Check-date; 12/92
Institution of Model Development: Dept. of Watermanagement, Provincial
Government Gelderland
Arnhem, The Netherlands
Code Custodian: Dept. of Watermanagement, Provincial
Government Gelderland, Arnhem, The Netherlands
Model Developed for: general use
Documentation: verification
Model Testing: code intercomparison
Peer Review:
Availability:
Computer Requirements:
proprietary, license,* compiled (PC} version
IBM PC/AT, 640 Kb RAM, CGA
Abstract:
STROPZ2 is flow and contaminant transport model for calculation of
stationary streamlines and traveltimes in a system one or two leaky
confined, homogeneous, isotropic aquifers. Flow in aquifers take place
under the Dupuit-Forcheimer assumption and is simulated using analytical
solutions. Regional flow is introduced by defining the head at two
different locations in each aquifer. Fully-penetrating wells can be
situated in each aquifer. Concentration distributions can be calculated
by simulating advective-dispersive transport using a random walk approach,
allowing for linear sorption and first-order decay. Continuous or
instantaneous pollutant sources are defined as point sources or as a
rectangle- or polygon-based one-, two- or three-dimensional distributed
source.
Remarks:
STROPZ2 has been verified by comparison with the model PLOPZN (see IGWMC #
1820; Jorna et al. 1991).
IGWMC Key: 679 0 Model name: WF
Model category: soil water budget
Authors: Young, S.C., and R.B. Clapp
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Current version:
Release date: 1989
First released: 1982
IGWMC Check-date: 12/92
Institution of Model Development: Oak
Div
Code Custodian: Oak Ridge Nat. Lab.,
Oak Ridge, Tennessee
Ridge Nat. Lab., Environm. Sciences
, Oak Ridge, Tennessee 37831
Environm, Sciences Div.
37831
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer requirements:
Abstract:
general use
theory, examples
The WF model provides an efficient method to calculate the water budget
for unvegetated, layered soils based on principles of soil physics.
Rainfall infiltration is simulated using the Green-Ampt equation with the
wetting front calculated according to Neumann {1976). Evaporation is based
on the soil-limited function described by Clapp (19833. Drainage at the
bottom of the profile is caused by gravity only. The model simulates the
changes xn the water balance and the simplified soil profile for
user-specified time steps. In the top layer water removal by plant roots
is accounted for.
IGWMC Key: 6800 Model name; WFLO/TFLO
Model category: saturated flow, solute transport
Authors: Noy, D.J.
Current version:
Release date: 1985
First released: 1982	IGWMC Check-date: 12/92
Institution of Model Development: British Geol, Survey, Fluid Processes
Res. Group, Keyworth, Notts NG12 5GG, UK
Code Custodian: British Geol. Survey, Fluid Processes
Res. Group, Keyworth, Notts NG12 5GG, UK
Model Developed for: general use
Documentation: theory, user's guide, examples
Model Testing:
Peer Review:
Availability:
Computer requirements: compiler, Harwell subroutine library
Abstract:
WFLOl-WFL05 are a series of program together forming a three-dimensional
Galerkin finite-element simulation model for steady-state and transient
saturated groundwater flow. The programs communicate with each other
through binary data files. TFLO is a single component uncoupled
three-dimensional finite element mass transfer program with hydrodynamic
dispersion, first-order decay or production, and non-linear equilibrium
sorption isotherms.
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IGWMC Key: 6840 Model name: PREDIS
Model category: saturated flow, unsaturated flow, solute transport,
groundwater-surface water, surface runoff
Authors:
Current version:
Release date: 1986
First released: 1986	IGWMC Check-date: 12/92
Institution of Model Development: Delft Hydraulics Laboratory, Water
Resources and Environment Div.
Delft, The Netherlands
Code Custodian: Delft Hydraulics Laboratory, Water Resources and
Environment Div., Delft, The Netherlands
Model Developed for: general use
Documentation: theory, user's guide, examples, verification
Model Testing: verification
Peer Review: concepts, theory
Availability: proprietary, license; source code
Computer Requirements: compiler
Abstract:
PREDIS is a multi-element hydrologic simulation model. It simulates the
movement of water in the land-phase of the hydrologic cycle, using
mathematical descriptions of the physical processes involved. It includes
modules for the saturated and unsaturated zone as well for surface runoff.
The transient movement of water in the multi-aquifer saturated zone is
simulated using a - wodirr.ens i onal or quasi - threedimensional Galerkin finite
element procedure. The unsaturated zone is simulated using a finite
difference approach. All connections between modules are reciprocal to
allow the subsystems to influence each other. The PREDIS system includes
a module for transport of contaminants in groundwater.
Remarks:
The PREDIS system comprises the following modules: 1) GROMULA, quasi-3D
simulation of saturated groundwater,- 2) SOMOF, simulation of unsaturated
flow including vegetation and surface runoff; 3) DRAIN, interface between
saturated groundwater and open channel flow; 4) WAFLOW, modified version
of NETFLOW for open channel flow,- and 5) GROKWA, contaminant transport in
saturated groundwater.
IGWMC Key: 6850 Model name: TWODAN
Model category: saturated flow
Authors: Fitts, C.R.
Current version: 3.0
Release date: 1994
First released: 1992	IGWMC Check-date: 07/94
Institution of Model Development:
Code Custodian: Charles R. Fitts
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79 Winnocks Neck Rd.
Scarborough, ME 04074
Model Developed for: research, general use, education
Documentation: theory, user's guide, examples, verification
Model Testing; code intercomparison
Peer Review: concepts, theory
Availability: proprietary, license; compiled (PC) version
Computer Requirements: Intel 80386 based computer, DOS/Windows, 2 Mb RAM,
math coprocessor, VGA
Abstract:
TKODAN (TWO-Dimensional ANalytic Groundwater Flow Model) simulates
steady-state flow in the horizontal or vertical plane using the analytic
element method, TWODAN can model aquifers with one or two layers,
confined or unconfined conditions, aquifer heterogeneities, global
infiltration or leakage, circular local infiltration or leakage areas, and
uniform regional flow. It can handle discharge specified, head specified,
or aquifer discharge specified wells in transient or steady state modes.
Streams and lakes are represented in the model as discharge or head
specified line sinks. Pathlines may be traced radially from wells, from
single or multiple points and may be used to define the extent of well
capture or contaminant migration in a specified time, TWODAN also has a
utility to compare calculated heads to observed heads to aid in
calibration. The program interface is based on a series of menus, help
files, and data entry forms. The user can import a DXF baaemap, then
graphically enter and edit the model features with a mouse. Mode output
can be viewed graphically on screen or directed to various graphics file
formats including DXF, Postscript, HPGL or Acorn Draw. Multiple model
runs and plots can be made from within TWODAN.
Remarks:
To understand the program, users are required to acquire Strack (1989,- see
references).
IGWMC Key: 6860 Model name: FLOWTHRU
Model category: saturated flow
Authors:
Current version:
Release date: 1992
First released: 1992	IGWMC Check-date: 01/93
Institution of Model Development: CSRIO, Australia
Code Custodian; unknown
Model Developed for: general use, education
Documentation:
Model Testing:
Peer Review;
Availability: proprietary, purchase; compiled {PC, Macintosh)
version
Computer Requirements: Intel 80386 based computer, 2 Mb RAM, math
coprocessor, VGA; Macintosh
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Abstracts
FLOWTHRU is a menu-driven program based on superposition of precomputed
finite element solutions for two-dimensional, cross-sectional flow
patterns in anisotropic aquifers near shallow surface water bodies. It
can be applied to evaluate the effects of shallow lakes, wetlands, rivers,
streams, canals and drains. The steady-state solutions were generated
using the finite element flow model AQUIFF.H-N. Graphic output includes
streamlines and equipotential lines.
IGWMC Key: 687 0 Model name: TECTYPE
Model category: aquifer test analysis
Authors:
Current version:
Release date: 1992
First released:	IGWMC Check-date: 01/93
Institution of Model Development: Tecsoft, Inc
Fort Collins, Colorado
Code Custodian: Richard Santoro
Tecsoft, Inc., PO Box 88, Fort Collins, Colorado, 80522
Model Developed for: general use, education
Documentation:
Model Testing:
Peer Review:
Availability: proprietary, purchase; compiled (PC) version
Computer Requirements: IBM PC/AT, 640 Kb RAM, DOS 2.1, CGA
Abstract:
TECTYPE is a type curve generation and aquifer test analysis package
consisting of the menu-driven modules TECTYPC (confined aquifer; Theis),
TECTYPL (leaky confined aquifer; Hantush-Jacob), TECTYPU (unconfined
aquifer with delayed yield from storage? Boulton for full penetration,
Neuman for partial penetration), TECDRAW (log-log and semi-log plots of
drawdown, recovery and slug test data) and TECAUTO (automatic type curve
matching using optimized least squares).
IGWMC Key: 6871 Model name: TECMOUND
Model category: saturated flow
Authors:
Current version:
Release date; 1992
First released:	IGWMC Check-date: 01/93
Institution of Model Development: Tecsoft, Inc, Fort Collins, Colorado
Code Custodian: Richard Santoro
Tecsoft, Inc., PO Box 88, Fort Collins, Colorado, 80522
Model Developed for: general use
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Documentation: user's guide
Model Testing:
Peer Review:
Availability: proprietary, license,* compiled (PC) version
Computer Requirements: IBM PC/AT, 640 Kb RAM, DOS 2.1, CGA
Abstract:
TECMOUND is a user-interactive program for calculation of the growth and
decline of a recharge mound based on Glover's analytical solution. It has
option to calculate recharge and discharge in an infinite aquifer,
discharge to a stream, and recharge and discharge when a linear boundary
is present. Output may be displayed graphically as a 2-D contour map or
as a 3-D contour surface.
IGWMC Key: 6872 Model name: TECWVEL
Model category; saturated flow
Authors:
Current version:
Release date: 1992
First released:	IGWMC Check-date: 01/93
Institution of Model Development: Tecsoft, Inc
Fort Collins, Colorado
Code Custodian: Richard Santoro
Tecsoft, Inc., PO Box 88, Fort Collins, Colorado, 80522
Model Developed for: general use
Documenta t i on
Model Testing:
Peer Review:
Availability: proprietary, license; compiled (PC) version
Computer Requirements: IBM PC/AT, 640 Kb RAM, DOS 2.1, CGA
Abstract:
TECWVEL is a program to determine average ground-water velocity (magnitude
and direction) or a velocity vector field from the head in up to 1000
locations. The velocity field is calculated using a grid of up to 200 *
200 interpolated heads. The aquifer may be anisotropic. TECVECT
generates a plot of a vector flow field produced by TECWVEL. Graphic
processing of calculated values through auxilliary programs.
IGWMC Key: 6880 Model name: SWIM
Model category: unsaturated flow
Authors:
Current version:
Release date: 1992
First released:	IGWMC Check-date: 01/93
Institution of Model Development: unknown
Code Custodian: unknown
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Model Developed for: general use, education
Documentations
Model Testing:
Peer Review:
Availability:
Computer Requirements:
theory, user's guide, examples
proprietary, license; compiled (PC) version
IBM PC/AT, 640 Kb RAM, 10 Mb disk space, math
coprocessor
Abstract;
SWIM (Soil-Water Infiltration and Movement) is a menu-driven series of
programs for simulation of transient one-dimensional vertical flow in
unsaturated porous media. The model solves numerically the Richard's
equation. The model handles nonuniform and layered soils, unsaturated,
saturated and ponded conditions, and transient soil surface conductance
and storage. It calculates volumetric water content, evaporation rates,
runoff and water balances. SWIM includes a textual preprocessor and a
graphic postprocessor.
IGWMC Key; 6890 Model name: MAP
Model category: solute transport, stochastic simulation
Authors: Sinberger, C.M.
Current version: 1.1
Release date* 9/92
First released: 1991	IGWMC Check-date: 07/94
Institution of Model Development: Golder Associates, Inc.
Redmond, Washington
Code Custodian: Einberger, C.M.
Golder Associates, Inc.
4104 148th Avenue, NE, Redmond, WA 98052
Model Developed for: general use, education
Documentation: theory, user's guide, examples, verification
Mode 1 Test.xng: verificati.on, field datasets, synth. datasets
Peer Review: concepts, theory
Availability: public domain, compiled (PC) version
Computer Requirements: IBM PC/AT, DOS 3.0, 640 Kb RAM, math coprocessor,
CGA/EGA/VGA
Abstract:
The monitoring analysis package MAP has been developed as a tool for the
design of monitoring networks. MAP includes the Plume Generation Model
PLUME, the Monitoring Efficiency Model MEMO, and the Contamination
Probability Model COPRO. MAP contains utilities for data input and well
location adjustment for efficiency determinations. MAP displays
intermediate and final results in graphic form directly on screen or to a
HP laser printer, or save the results in HPGL (graphic) and ASCII (text)
files. PLUME uses a two-dimensional analytical transport function for
solute released along a continuous line source in an aquifer with a
uniform flow field. MEMO provides for optimizing monitoring well
locations. The user inputs site geometry, hydrogeologic characteristics
and initial monitoring well locations, and MEMO determines the efficiency
of this monitoring network configuration in terms of the ratio of the area
from which a release would be likely detected to the total potential
source area. The user can change the location of the wells and add or
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delete wells. COPRO maps the probabilities of down-gradient contamination
from a single random leak within a defined irregular shaped potential
source area. Program operation and data entry/editing is facilitated by a
menu driven user interface. Output includes tabular and graphic display
on screen.
IGWMC Key: 69 00 Model name: ROSE
Model category: saturated flow
Authors; Lerner, D.N.
Current version:
Release date: 1/91
First released: 1991	IGWMC Check-date: 05/93
Institution of Model Development: Univ. of Birmingham, Hydrogeology
Research Group, School of Earth Sc.
Edgbaston, Birmingham, United Kingdom
Code Custodian: Lerner, D.N.
Hydrogeology Research Group, School of Earth Sciences
University of Birmingham, Edgbaston, Birmingham, B15 2TT,
United Kingdom
Model Developed for: general use
Documentation; concepts and theory, test results
Model Testing: code intercomparison
Peer Review:	concepts, mathematical framework
Availability:
Computer requirements:
Abstract;
ROSE is a semi-analytical pathline tracking model for the determination of
well catchment areas and time-of - travel zones. It uses reverse pathline
tracking from well to point of origin for an aquifer with constant
saturated thickness, transmissivity and recharge. It is based on
analytical expressions for pore water velocities in two infinite strip,
recharged aquifers, one with two fixed head boundaries, the other with one
impermeable boundary.
IGWMC Key: 6910 Model, name: GWT
Model category: saturated flow, unsaturated flow, solute transport
Authors:
Current version:
Release date:
First released:	IGWMC Check-date: 05/93
Institution of Model Development: MicroEng. Inc., Annandale, VA 22003
Code Custodian: MicroEng. Inc.
P.O.Box 1344, Annandale, VA 22003
Model Developed for: general use
Documentation:
Model Testing:
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Peer Review:
Availability: proprietary, purchase; compiled (PC) version
Computer requirements: Intel 80386 based computer, 2 Mb RAM, DOS 3.1,
Windows 3.0, VGA
Abstract:
GWT is a MS-Windows interface for environmental fate models. The
interactive graphical, icon-driven program includes the USGS MODFLOW
model, a 3D transport module and a module for flow in the unsaturated
zone. The program has extensive imaging and grid generation capabilities
and supports kriging and error estimation.
IGWMC Key: 6920 Model name: GAS3D
Model category: vapor flow/transport
Authors: Sepehr,	M., and Z.A. Samani
Current version:
Release date:	1/92
First released:	1992	IGWMC Check-date: 05/93
Institution of Model Development: New Mexico State University, Dept. of
Civil Eng., Las Cruces, New Mexico
Code Custodian: Sepehr, M.
SOMA Environmental Engineering
155 Filbert St., Suite 230, Oakland, CA 94607
Model Developed for
Documentation
Model Testing
Peer Review
Availability
Computer requirements
Abstract:
general use, site-specific
concepts and theory, test results
benchmarking (analyt. solutions), field testing
concepts, mathematical framework, performance
GAS3D is a transient three-dimensional gas flow model for the design of
soil venting systems under isothermal conditions. The model is based on
the mass flux balance combined with Darcy's law. It takes into account
the effects of partial penetration and partial screening of vapor
extraction wells as well as the nonhomogeneity and anisotropy of the soil
Gas density is described using the ideal gas law in terms of gas pressure
and temperature. To account for the effects of moisture content on the
gas permeability and porosity of the soil, a modified Brooks-Corey
equation is used. The non-linear finite difference equations are solved
using successive over-relaxation method combined with the Newton-Raphson
technique. The model handles constant pressure boundaries (e.g.,
atmospheric pressure) and no-flow boundaries.
IGWMC Key: 6930 Model name: Two-dimensional multi-compound vapor
transport model
Model category; vapor transport
Authors: Benson, D.A., D. Huntley and P.C. Johnson
Current version:
Release date: 6/92
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First released: 1992	IGWMC Check-date: 06/93
Institution of Model Development: San Diego State Univ., Dept. Geol. Sc.
San Diego, CA 92182
Code Custodian: Benson, D.A.
Applied Geosciences, Inc.
29B Technology Drive, Ste. 100, Irvine, CA 92718
Model Developed for: research, general use
Documentation: concepts and theory, test results, example problems
Model Testing; benchmarking (analyt. solutions), code
intercomparison
Peer Review: concepts, mathematical framework, performance
Availability:
Computer requirements:
Abstract:
This model couples the two-dimensional steady-state vapor flow equation,
advection-diffusion transport equation and a multiple compound, multiphase
partitioning model (vapor, adsorbed, dissolved and NAPL phases). The
numerical implementation allows spatially variable fields of permeability,
confining layer permeability and initial contaminant concentration. Based
on the concentration of each chemical compound, the model calculates
whether a nonaqueous phase liquid is present, and calculates the chemical
phase distribution by the appropriate equilibrium partitioning formulation
(Henry's law or Raoult's law). The user can specify the location and
discharge rates of extraction wells, including zero wells in which case
transport takes place by diffusion only.
IGWMC Key: 694 0 Model name:
Model category: saturated flow
CAPZONE
Authors: Bair, E.S., A.E. Springer and G.S. Roadcap
Current version: 1.1
Release date: 4/92
First released: 1991
IGWMC Check-date: 07/94
Institution of Model Development: Ohio State Univ., Hydrology Program,
Dept. of Geolog. Sciences
Columbus, Ohio 43210
Code Custodian: Bair, E.S.
Ohio State Univ., Dept. of Geological Sciences
171 Scott Hall, 1090 Carmack Road, Columbus, OH 43210-1002
Model Developed for: general use, education
Documentation: concepts and theory, model setup, input
instructions, example problems
code intercomparison
concepts, documentation
public domain; compiled (PC) version
IBM PC/AT, 640 Kb RAM, CGA/EGA
Model Testing;
Peer Review:
Availability:
Computer requirements:
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Abstract:
CAPZONE is an analytical flow model for computing drawdowns for up to 100
wells in an isotropic, homogeneous confined, leaky-confined or unconfined
aquifers. The model uses either the Theis equation or the Hantush-Jacob
equation to compute drawdowns at the intersections of a regularly-spaced
rectangular grid. The grid can be up to 75 row by 75 columns. Computed
drawdowns in unconfined aquifers are corrected for aquifer dewatering
using Jacob's correction equation. Computed drawdowns can also be
subtracted from regional water levels. The resulting heads and/or
drawdowns can be saved in a file format suitable for contouring with any
x-y-z format contouring package. Computed heads and/or drawdowns can also
be displayed in tabular format to the monitor or sent to a printer. The
program prompts for input and builds the input data file which can be
edited in the preprocessor. It creates output files compatible with
commercial contouring packages, or for use in GWPATH for plotting capture
*-* UJilC O •
IGWMC Key: 6950 Model name: VERTPAK-1
Model category: saturated flow, solute transport, deformation, porous
medium, fractures
Authors: Lester,	B., P.S. Huyakorn, and D.S. Ward
Current version:	2.0
Release date:	5/93
First released:	1983	IGWMC Check-date: 06/93
Institution of Model Development: GeoTrans, Inc,
46050 Manekin Plaza, Suite 100,
Sterling, VA 22170
Code Custodian: Code custodian
Performance Assessment Dept., Off. of Nuclear Waste
Isolation, Battelle Project Management Div.,
505 King Avenue, Columbus, OH 43201
Model Developed for: general use, model testing
Documentation: concepts and theory, code structure, user's
instructions, example problems
Model Testing:
Peer Review: concepts
Availability: public domain, source code, compiled (PC) version
Computer Requirements: IBM PC/AT, DOS 2.0, 640 Kb RAM, CGA; compiler for
other platform
Abstract:
VERTPAK-1 is a package of eight analytical solutions covering fluid flow,
rock deformation and solute transport in fractured and unfractured porous
media: 1) transient well-flow in a fractured double-porosity confined
aquifer; 2) plane strain and axisymmetric consolidation of a semi-infinite
saturated free-draining soil; 3) transient flow to a partially penetrating
well in a confined aquifer with a single horizontal fracture; 4) transient
flow to a fully penetrating well in a confined aquifer and intercepting
the center of a vertical fracture,* 5) thermoelastic deformation in the
form of elastic behavior of an infinite medium subject to a line heat
source; 6} one-dimensional dispersive-advective solute transport for a
three-component radionuclide chain; 7) transient well flow in a
fractured-rock confined aquifer; and 8) advective and dispersive solute
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transport along a single planar fracture with diffusion into the adjacent
rock matrix.
Remarks:
VERTPAK-1 consists of 8 separate programs: 1) BAREN based on the
Barenblatt et al (I960) solution; GIBMAC based on the McNamee and Gibson
(I960) solution; 3) GRINRH based on the Gringarten (1971) solution; 4)
GRINRV based on the Gringarten et al (1974) solution; 5) HART based on the
Nowaeki (1962) solution; 6) LISTER based on the Lester et al (1975)
solution; 7) STRELT based on the Streltsova-Adams (1978) solution; and 8)
TANG based on the Tang et al (1981) solution.
IGWMC Key: 6980 Model name: GEOPACK
Model category: geostatistics
Authors: Yates, S.R., and M.V. Yates
Current version: 1,Oe
Release date: 7/92
First released: 1990	IGWMC Check-date: 07/94
Institution of Model Development: USDA, U.S. Salinity Laboratory
Riverside, CA 92501
Code Custodian: Yates, S.R.
USDA/ARS, U.S. Salinity Laboratory
4500 Glenwood Drive, Riverside, CA 92501
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer requirements:
research, general use
concepts and theory, input instructions,
installation, example problems
concepts, mathematical framework, documentation
public domain, source code, compiled (PC) version
IBM PC/AT, 640 Kb RAM, DOS 3.0, 4 Mb disk space
Abstract:
GEOPACK is a user - friendly geostatistical software system consisting of
programs for conducting analyses of the spatial variability of one or more
random functions. The system includes several statistical analysis
options, such as mean, median, variance, standard deviation, skew,
kurtosis, and maximum and minimum values can be determined for the
selected data base. Programs are also included for linear regression,
polynomial regression, the Kolomogorov-Smirnov test for distribution, and
for calculating various percentiles. Variogram programs allow
determination of a sample variogram, the cross-semivariogram, or a
semivariogram for combined random functions for a two-dimensional
spatially-dependent random function. GEOPACK includes options to
calculate ordinary kriging and cokriging estimators in two dimensions and
their associated variance. Nonlinear estimators such as disjunctive
kriging and disjunctive cokriging can also be determined. Various
graphics capabilities are included in GEOPACK such as linear or
logarithmic line plots, contour plots, and block diagrams. The GEOPACK
graphics programs produce intermediate quality output and are intended for
quick and easy graphic illustrations. For the highest quality graphic
output, GEOPACK can be interfaced with any user-define graphics package to
develop custom graphics.
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IGWMC Key: 6990 Model name: GEO-EAS
Model category: geostatistics
Authors: Englund. E,, and A,
Current version: 1.2.1
Release date; 3/92
First released: 1991
Sparks
IGWMC Check-date: 06/93
Institution of Model Development: U.S. EPA, Environmental Monitoring
Systems Laboratory
Las Vegas, Nevada 89193-3478
Code Custodian: Englund, E.
U.S. EPA/ORD, Env. Monitoring Systems Lab.
Las Vegas, NV 89193-3478
Model Developed for:
Documen ta t i on:
Model Testing:
Peer Review:
Availability:
Computer requirements;
Abstract:
general use
installation, input instructions,
example problems
documentation
public domain, source code, compiled (PC) version
IBM PC/AT 512 Kb RAM, CGA, DOS 3.0, 3 Mb disk space;
compiler for larger versions or other platform
GEO-EAS is a collection of interactive software tools for performing
two-dimensional geostatistical analyses of spatially distributed data.
Programs are provided for data file management, data transformations,
univariate statistics, variogram analysis (spherical, Gaussian, exponent
and linear structure), cross-validation {for each of the variogram
structure options), ordinary and simple, block and point kriging, contour
mapping, post plots, and line/scatter graphs. Features include:
hierarchical menus, informative messages, full-screen data entry/editing,
on-screen graphical display of intermediate and final results and output to
ASCII files and graphical metafiles.
IGWMC Key: 7010 Model name: S0ILC02
Model category: unsaturated flow, vapor flow/transport, multiphase flow
Authors: Simunek, J., and D.L. Suarez
Current version: 1.1
Release date: 12/92
First released; 1992	IGWMC Check-date: 06/94
Institution of Model Development; USDA, U.S. Salinity Laboratory
Riverside, CA 92501
Code Custodian: Suarez, D.L.
USDA/ARS, U.S. Salinity Laboratory
4500 Glenwood Drive, Riverside, CA 92501
Model Developed for: research, general use
Documentation: concepts and theory, input instructions, code
structure, test results, example problems
Model Testing: field testing
Peer Review:
Availability: public domain, source code
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Computer requirements: compiler
Abstract:
S0ILC02 is a combined finite element/finite difference simulation model,
based on process oriented relationships. The model includes
one-dimensional water flow and multiphase transport of C02, utilizing the
Richard's and the convection-dispersion equations, respectively, as well
as heat flow and a C02 production model. The flow equation includes a
sink term for plant uptake of water. C02 can occur both in liquid and gas
phases. The gas transport equation accounts for production of C02 and C02
uptake by plant roots associated with water uptake. The C02 production
model considers both microbial and root respiration which are dependent on
water content, temperature, growth, salinity, and plant and soil
characteristics. Heat flow is also included m the model, since some gas
transport parameters, partitioning coefficients and production parameters
are strongly temperature dependent.
IGWMC Key.- 7020 Model name: USGS-SOL
Model category: solute transport
Authors: Wexler,	E.J.
Current version:	1.0
Release date:	6/93
First released:	1992
IGWMC Check-date: 08/93
Geological Survey, Water Resources
Federal Center, Denver, CO 80225
Institution of Model Development: U.S
Div
Code Custodian: Wexler, E.J.
Gartner Lee, Ltd., 140 Renfew Drive, Suite 102, Markham,
Ontario L3R 8B6, Canada
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer requirements:
Abstract:
research, general use
concepts and theory, input, instructions, example
problems
comparison with published solutions
concepts, mathematical framework, documentation
public domain, source code, compiled {PC) version
IBM PC/AT, €4 0 Kb RAM, CGA; compiler for other
platforms
USGS-SOL presents a series of 9 analytical solutions of the PDE describing
advective-dispersive transport of a non-conservative solute for a variety
of boundary types and solute source configurations in one, two, and three
dimensions. The solutions assume uniform aquifer properties and
ground-water flow. All models include first-order decay. Linear
adsorption and ion exchange can be simulated by dividing the fluid
injection rate, seepage velocity, and dispersion coefficients by the
retardation factor in the input data.
IGWMC Key: 7030 Model name: PREPR03FLO/PREMOD
Model category: pre -/postprocessing
Authors: Andersen, P.F.
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Current version
Release date
First released
1993
1985	IGWMC Check-date: 09/93
Institution of Model Development: GeoTrans, Inc,
Sterling, VA 22170
Code Custodian; Andersen, P.F,
GeoTrans, Inc., 1080 Holcomb Bridge Rd., Bldg, 100,
Suite 300, Roswell, GA 30076
Model Developed for: general use, education
Documentation: input instructions, example problems
Model Testing:
Peer Review:
Availability: proprietary {GeoTrans or IGWMC)j compiled (PC)
version
Computer requirements: IBM PC/AT, 640 Kb RAM, CGA; compiler for other
platforms
Abstract:
PREPR03FL0 is an interactive user friendly program used to create new
input data files or modify existing data files used with the USGS MODFLOW
model (IGWMC Key # 3980) . The program leads the user through the various
MODFLOW options. Once a selection is made, the program prompts for the
necessary data entry as required for the selected option(s). The
preprocessor checks data entries for type and reasonableness and inserts
them into the correct fields and locations in the data file. Array data
entry is facilitated by six different algorithms that eliminate repetitive
data. In the menu-driven modification mode the user can zoom in on only
those parameter values which need to be changed. PREMOD is a special
version of PREPRO3FLO prepared for the IGWMC.
IGWMC Key: 7031 Model name: Graphic Groundwater
Model category: pre-/postprocessing
Authors; Esling,	S.P.
Current version:
Release date:	199 3
First released: IGWMC Check-date: 09/93
Institution of Model Development: Micro- innovations, Inc.
Carbondale, Illinois
Code Custodian: Esling, S.P.
Micro-innovations, Inc.
P.O. Box 190, Carbondale, IL 62903-0190
Model Developed for: general use
Documentation:
"Model Testing: code intercomparison
Peer Review:
Availability: proprietary; compiled (PC) version
Computer requirements: Intel 80386 based computer, 2 Mb RAM, VGA, DOS 3.0,
MS Windows 3.1
Abstract:
Graphic Groundwater is a graphical groundwater flow simulation system
combining a graphics-based pre- and postprocessor with a version of the
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USGS MODFLOW model (rewritten in C++) running under Microsoft Windows.
(For discussion of MODFLOW see IGWMC Key # 3980) . Only the SIP MODFLOW
solver is currently available. In implementing the special version of,
MODFLOW, changes have been made in the way anisotropy and vertical
conductance is handled. The preprocessor allows the user to superimpose a
model grid on a map of the study area and to select subgrids for assignment
of parameter values or stresses. The results can be viewed graphically
(contours of heads, drawdowns, cell-by-cell budgets, and parameter
distributions).
IGWMC Key: 7050 Model name: MOSES
Model category: surface runoff, solute transport, stochastic simulation
Authors:


Current version:
1.0

Release date:
04/91

First released:
1990
IGWMC Check-date: 06/94
Institution of Model Development: Tetra Tech Inc.
Environmental System Engineering, 3746
Mt. Diablo Blvd., Lafayette, CA 94549
Code Custodian; Electric power Software Center
Electric Power Research Inst.
P.O. Box 10412, Palo Alto, CA 94303-9743
Model Developed for: general use
Documentation:
Model Testing:
Peer Review:
Availability: proprietary, license; compiled (PC) version
Computer Requirements: IBM PC/AT, 640 Kb RAM, EGA/VGA
Abstract:
MOSES (Mineral Oil Spill Evaluation System) estimates the probability that
spills from electric utility substations or above ground storage tanks
would reach surface water by overland flow. The processes considered in
the model include on-site storage (e.g., in the gravel bed surrounding
equipment or tanks), infiltration in the underlying soil, volatilization,
off-site retention, off-site storage, and transport by overland flow and
surface water runoff. The volume of oil spilled can be represented using
either a uniform or exponential probability function. The code
incorporates a Monte Carlo routine for selecting values for each input
parameter from user-defined ranges. The code computes the probability
that the spill remains on-site; that a spill occurs and remains on-site,
and that a spill occurs and reaches surface water.
Remarks:
MOSES includes a Monte Carlo routine which randomly selects values from
user-supplied ranges to calculate probabilities. The effect of rainfall
is included. Major data requirements include; oil properties, tank
capacities, probability of rank failure or leak, on-site storage capacity,
off-site storage capacity and parameters describing overland flow. Model
output includes tabular listings of probability that the spill will be
contained on site, and probability that spill will reach surface water.
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Graphical output includes plots of relative frequency distributions for
spills reaching water
IGWMC Key: 7060 Model name: ROAM (Remediation Options Assessment
Model)
Model category: solute transport
Authors:
Current version:	1.0
Release date:	10/93
First released:	10/93	IGWMC Check-date: 06/94
Institution of Model Development: Tetra Tech Inc.
Environmental System Engineering, 3746
Mt. Diablo Blvd., Lafayette, CA 94549
Code Custodian: Electric Power Software Center
Electric Power Research Inst.
P.O. Box 10412, Palo Alto, CA 94303-9743
Model Developed for: general use
Documentation: code/modules description
Model Testing:
Peer Review:
Availability: copy-righted
Computer requirements: Intel 80386 based computer, math coprocessor, 8 Mb
RAM, VGA monitor, DOS 3.3 or higher, Windows 3.1
Abstract:
ROAM is a groundwater flow and contaminant transport code that evaluates
soil and groundwater concentrations for pre- and post-remediation
conditions. Originally designed for MGP sites, ROAM can also be used at
above ground and underground storage tank facilities and at waste
management facilities. While the model is computationally complex,, the
Windows graphical interface built into ROAM makes this a very user
friendly code. ROAM predicts the impacts of remedial actions on
concentrations of either dissolved chemicals or heavy coal tar and fuel
constituents in soils and groundwater. The model has the capability to
consider multiple sources. Remedial actions evaluated include
pumping/extraction systems, caps, slurry walls, source removal, gravity
drains, and in-situ bioremediation. ROAM is well-suiteds for evaluating
remediation options at MGP sites and sites with multiple sources.
IGWMC Key: 7090 Model name: V-TOUGH
Model category: unsaturated flow, vapor flow/transport, heat transport,
porous medium, fractures
Authors: Buscheck, T.A., and J.J. Nitao
Current version:
Release date: 1989
First released: 1987	IGWMC Check-date: 11/93
Institution of Model Development: Lawrence Livermore Nat. Lab.,
Environmental Technology Program
Univ. of Calif., Livermore, CA 94551
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Code Custodian: Nitao, J.J.
Lawrence Liverraore Nat. Lab., Environm. Technology Program
Univ. of Calif., Livermore, CA 94551
Model Developed for: research, general use
Documentation: concepts and theory, input instructions, test results
Model Testing: code intercomparison, laboratory data sets
Peer Review: concepts, mathematical framework
Availability: public domain, source code
Computer requirements: compiler
Abstract:
V-TOUGH (Vectorized Transport Of Unsaturated Groundwater and Heat) is a
multidimensional, integral finite difference simulator capable of modeling
the coupled transient flow of water and vapor/air, and transport of heat
in heterogeneous, anisotropic fractured porous media. The model is based
on the TOUGH code and modified to handle density-driven flow of gaseous
VOCs in unsaturated media. V-TOUGH accounts for liquid- and gaseous-phase
fluid flow under pressure, viscous, and gravity forces according to
Darcy's law. The code simultaneously solves the balance equations for air
mass, water mass, and energy. The combined effects of capillarity and
phase adsorption are accounted for in the moisture retention curves.
Vapor-pressure lowering due to capillarity is accounted for using Kelvin's
equation. Dissolution of air in water is represented by Henry's law.
Heat transport includes conduction and convection.
IGWMC Key: 7100 Model name: FL0W2D
Model category: saturated flow
Authors: Durbin,	T.J.
Current version:
Release date:	1984
First released: 1984	IGWMC Check-date: 11/93
Institution ot Model Development: Williamson and Schmid, Hydrotec Div.
260 Russell Boulevard, Suite B, Davis,
CA 95616
Code Custodian: Durbin, T.J.
Hydrologic Consultants, Inc.
1947 Galileo Ct., Davis, CA 95616
Model Developed for: general use
Documentation: concepts and theory, code structure
Model Testing:
Peer Review:
Availability:	public domain, source code
Computer requirements:	compiler
Abstract:
FL0W2D is a twodimensional finite element model for simulating transient
or steady-state groundwater flow in a heterogeneous, isotropic, watertable
aquifer. Sources and sinks are allowed at any node, and rates may vary in
time. The program utilizes triangular elements and linear trial functions
and supports specified head and flux boundaries. The nonlinear governing
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equation is solved iteratively, using upper-triangularization and
back-substitution.
IGWMC Key: 7101 Model name: TRANS2D
Model category: solute transport
Authors: Durbin,	T.J.
Current version:
Release date:	1984
First released:	1984
IGWMC Check-date: 11/93
Institution of Model Development: Williamson and Schmid, Hydrotec Div.
260 Russell Boulevard, Suite B, Davis,
CA 95616
Code Custodian: Durbin, T.J.
Hydrologic Consultants, Inc.
1947 Galileo Ct., Davis, CA 95616
Model Developed for: general use
Documentation:	concepts and theory, code structure
Model Testing:
Peer Review:	concepts and theory
Availability:	public domain, source code
Computer requirements:	compiler
Abstract:
TRANS2D xs a twodimensional finite element model for simulating
advective-dispersive solute transport in a confined or unconfined aquifer.
The model supports prescribed concentration and solute flux boundaries,
point and nonpoint solute sources/sinks (e.g., concentration of recharge).
It uses triangular elements in space, and finite elements in time. The
program requires the output of FLOW2D to compute for each time step the
groundwater velocity distribution.
IGWMC Key: 7120 Model name: FEGW3
Model category: saturated flow
Authors: Yoon, Y.S.
Current version:
Release date: 1985
First released: 1978	IGWMC Check-date: 11/93
Institution of Model Development: Boyle Engineering Corporation
Wheat Ridge, Colorado
Code Custodian: Yoon, Y.S.
Boyle Engineering Corporation
4643 Wadsworth Blvd., #6, Wheat Ridge, CO 80033
Model Developed for:	general use
Documentation:	concepts and theory
Model Testing:
Peer Review:
Availability:	proprietary
Computer requirements:	compiler
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Abstract:
FEGW3 (Finite Element groundwater Model- Version 3} is a two-dimensional
finite element model for simulation of transient groundwater flow in
multi-layered, heterogeneous, anisotropic aquifers of different extent.
It supports the analysis of the effects of time-varying recharge form
rainfall, recharge/discharge wells, agricultural seepage,
evapotranspiration, and recharge from and discharge to surface water. The
model uses both triangular and quadrilateral elements. Boundary
conditions supported include prescribed heads (first type), prescribed
fluxes (second type), and a combination of both (third type). The
resulting algebraic equations are solved using the Block Successive Over-
Relaxation technique. The model includes representation of a well within
an element by a superposed analytical solution. The model includes a
module to coxpute velocities and streamlines.
IGWMC Key: 7130 Model name: 2D-FED
Model category: fresh/salt water flow
Authors: Sherif,	M.M., V.P. Singh, and A.M. Amer.
Current version:
Release date:	19 87
First released:	1987	IGWMC Check-date: 11/93
Institution of Model Development: Louisiana State Univ., Dept. of Civil
Eng., Baton Rouge, LA 70803
Code Custodian: Singh, V.P.
Louisiana State Univ., Dept. of Civil Eng.
Baton Rouge, LA 70803
Model Developed for: general use
Documentation: concepts and theory
Model Testing; code intercomparison
Peer Review: concepts, mathematical framework
Availability: public domain, source code
Computer requirements: compiler
Abstract:
2d-FED is a twodimensional finite element model for simulating saltwater
intrusion in heterogeneous, anisotropic, confined and leaky confined
coastal aquifers under steady-state conditions. The governing equations
are combined in two nonlinear coupled PDE's in concentration and
equivalent fresh water head, respectively. The lateral boundary at the
land side has constant (fresh water) concentration, while the water flux
known (calculated using Darcy). On the seaward side, a mixed boundary is
used: in the segment where the fluid leaves the modeled system, the
concentration gradient is zero, and in the segment where the sea water
enters the system, the boundary concentration equals seawater
concentration. For the upper (leaky) boundary, either a vertical downward
leakage of freshwater which constant concentration is assumed, or (for
upward flow) the concentration gradient is zero.
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IGWMC Key: 7140 Model name: 2D-DIFF
Model category: vapor flow/transport
Authors: Silka, L.R.
• Current version:
Release date: 1986
First released: 1986	IGWMC Check-date: 11/93
Institution of Model Development: Hydrosystems, Inc.
Falls Church, Virginia
Code Custodian: Silka, L.R.
Hydrosystems, Inc.
2042 Peach Orchard Drive, Falls Church, VA 22043
Model Developed for: general use
Documentation: concepts and theory
Model Testing:	laboratory data sets
Peer Review:	concepts, mathematical framework
Availability:	public domain, source code
Computer requirements:	compiler
Abstract:
2-DIFF is a diffusive vapor flow/transport model, designed to assist in
the interpretation of soil gas surveys, especially concerning VOCs. The
finite difference model is based on the simulation of time-varying,
two-dimensional vapor transport in the unsaturated zone using Fick's
second law of diffusion. An effective diffusion coefficient is used
incorporating the effects of tortuosity, moisture content, and soil
organic carbon content. Partitioning between soil gas, soil moisture, and
soil solids is based on equilibrium assumptions and linear isotherms.
IGWMC Key: 7150 Model name: GSAS
Model category: statistical analysis
Authors: Loftis, J;, and H. Horsey
Current version:
Release date: 1993
First released: 1993	IGWMC Check-date: 11/93
Institution of Model Development: Intelligent Decision Technologies
Boulder, Colorado
Code Custodian: Horsey, K.
Intelligent Decision Technologies
3308 Fourth Street, Boulder, CO 80304
Model Developed for:	general use
Documentation:	input instructions, example problems
Model Testing:
Peer Review:
Availability:	proprietary, purchase
Computer requirements:	Macintosh
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Abstract:
GSAS {Groundwater Statistical Analysis System) is a RCRA-oriented program
incorporating the statistical tests required by EPA regulations. The
model is designed within a graphic environment and using expert system
approaches in taking the user step-by-step through data preparation, test
selection, data analysis, and presentation of results. The program
supports descriptive analysis, interwell tests (multiwell comparison),
intrawell tests (single we11 analysis), and statistical comparisons with
fixed concentration limits. GSAS includes extensive data base management.
To ensure that all appropriate procedures and adjustments are made, GSAS
checks data with pre- and post-analysis tests.
IGWMC Key: 7160 Model name: GRITS/STAT
Model category: statistical analysis
Authors:
Current version:
Release date: 1992
First released:	IGWMC Check-date: 11/93
Institution of Model Development: U.S. EPA, Off. of Solid Waste
Washington, D.C. 20460
Code Custodian: U.S. EPA, Off. of Solid Waste
Washington, D.C. 20460
Model Developed for: general use
Documentation:
Model Testing:
Peer Review:
Availability: public domain
Computer requirements: IBM PC/AT, 640 Kb RAM
Abstract:
GRITS/STAT is a package for statistical analysis of groundwater monitoring
data managed by using the GRITS data base management'system. The program
incorporates the major statistical analyses recommended by EPA for
compliance with various regulations. It is designed to store and retrieve
information generated through ground-water monitoring programs at RCRA,
CERCLA, and other regulated facilities and sites. The database section of
the system stores facility information including latitude, longitude,
state FIPS codes, and county FIPS codes. Well information includes well
construction, some hydrologic information, and location codes. It
accommodates replicates, duplicates, non-detects, laboratory data
qualifiers, CAS numbers, and method codes. Spreadsheet data entry is
accomplished by Lotus templates. After the information is entered in
Lotus, the GRITS/STAT system imports the information into the database.
IGWMC Key: 7180 Model name: SRT
Model category: data base
Authors: Burden, D.S., and D.L. Shackleford
Current version:
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Release date: 1993
First released:
IGWMC Check-date: 11/93
Institution of Model Development: U.S. EPA, R.S. Kerr Env. Res. Lab.
Ada, OK 74820
Code Custodian: Burden, D.S,
U.S. EPA, R.S. Kerr Env. Res. Lab, Ctr. for Subsurface
Modeling Support (CSMoS), P.O. Box 1198, Ada, OK 74820
Model Developed for: general use
Documentation:
Model Testing:
Peer Review:
Availability: contact custodian
Computer requirements: contact custodian
Abstract:
The Subsurface Remediation Technology (SRT) Database provides site
specific information concerning subsurface contamination and remediation
activities at Superfund sites. The SRT Database consists of five related
components: site characterization, methods of remediation, contaminants,
consulting firms, and references cited. The site component serves as the
core and includes historical notes, descriptions of the contaminants,
soil, geology and hydrogeology, alternative remediation methods
considered, and the names of EPA Regional staff associated with the sites.
IGWMC Key: 7190 Model name: TRIWACO/TRACE
Model category: saturated flow
Authors:
Current version:
Release date: 1988
First released: 1988	IGWMC Check-date: 11/93
Institution of Model Development: IWACO B.V., Rotterdam, The Netherlands
Code Custodian: IWACO B.V.
P.O. Box 183, 3000 AD Rotterdam, The Netherlands
Model Developed for:	general use
Documentation:	input instructions
Model Testing:
Peer Review:
Availability:	proprietary, license
Computer requirements:	IBM PC/AT, 640 Kb RAM, VGA
Abstract:
The TRIWACO model finite element simulates steady-state and transient flow
in multi-layered heterogeneous, anisotropic aquifer systems. The model
supports simultaneous phreatic conditions in part of the system and
confined conditions in other areas. The model allows simulation of both
horizontal and vertical two-dimensional, and quasi-threedimensional
geometries. It supports a variety of boundary conditions and stresses,
including (non-)linear recharge, streams, sources/sinks, and prescribed
heads and fluxes. TRACE is a postprocessing program to generate
streamlines and traveltimes for steady-state simulations.
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IGWMC Key; 7191 Model name: SALINA
Model category: fresh/salt water flow
Authors:
Current version:
Release date: 1988
First released:
IGWMC Check-date: 11/93
Institution of Model Development: IWACO B.V., Rotterdam, The Netherlands
Code Custodian; IWACO B.V.
P.O. Box 183, 3000 AD Rotterdam, The Netherlands
Model Developed for: general use
Documentation: concepts and theory, input instructions, example
problems
Model Testing:
Peer Review:
Availability:
Computer requirements:
Abstract:
proprietary, license
IBM PC/AT, 640 Kb RAM, CGA; compiler for larger
versions or other platform
SALINA is a finite element model for steady-state and transient simulation
of quasi -threedimensional (horizontal or cross-sectional) groundwater flow
in heterogeneous, anisotropic aquifers. The model is especially designed
to handle groundwater flow problems in coastal areas, where fresh water
interferes with saline water of a different density. The occurrence of
fresh/salt water interface is limited to the bottom aquifer of the
multi-aquifer system handled by the model. It simulates lateral salt
water intrusion, upconing of a underlying salt water body, and the
movement of the salt/fresh water interface. The model is based on the
Ghyben-Dupuit assumption to execute transient groundwater flow
calculations. The time stepping is fully implicit, and it uses the
conjugate gradient method to solve the resulting algebraic equations.
IGWMC Key: 7210 Model name: MIKE SHE
Model category: saturated flow, unsaturated flow, solute transport,
watershed runoff, surface runoff, sediment transport
Authors: Abbott, M.B., J.C. Bathurst, J.A. Cunge, P.E. O'Connell and J.
Rasmussen
Current version: 5.1
Release date: 8/1993
First released: 1980	IGWMC Check-date: 11/93
institution of Model Development: Institute of Hydrology (UK), SOGRAEH
Consulting (France), Danish Hydraulic
Inst. (Denmark)
Code Custodian: Refsgaard, A.
Danish Hydraulic Institute
Agern Alle 5, DK-2970 Horsholm, Denmark
Model Developed for: general use
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Documentation:
concepts and theory, model setup, input
instructions, example problems, test results
functionality testing, code intercomparison,
verifxcation
concepts, mathematical framework
proprietary, license
Computer requirements: UNIX workstations, X Windows, Motif, FORTRAN, C
compiler; 200 Mb disk storage, 16 Mb RAM
Abstract:
Model Testing:
Peer Review:
Availability:
MIKE SHE is a menu-driven deterministic, distributed, physically-based
modeling system for simulation of all major hydrological processes of the
land phase of the hydrological cycle. The system is highly interactive
and operates in a windowed graphic environment. It supports a wide
variety of graphic pre- and postprocessing tools. For groundwater,
MIKE-SHE includes a threedimensional description of both flow {Boussinesq)
and advective-dispersive conservative solute transport, and an add-on
module for description of transport in dual porosity media (diffusion into
matrix). The system also includes add-on modules for simulation of 1-D
flow {Richard's equation), overland flow, channel flow, soil erosion,
advective-dispersive conservative solute transport in the unsaturated
zone, overland flow, and channel flow, and chemical reactions of inorganic
constituents in groundwater. The modeling system supports telescopic
gridding.
IGWMC Key: 7211 Model name: WATBAL
Model category: water budget, watershed runoff, surface runoff
Authors:
Current version:
Release date* 19B5
First released: 1985	IGWMC Check-date: 11/93
Institution of Model Development: Danish Hydraulic Institute
Agern Alle 5, DK-2970 Horsholm, Denmark
Code Custodian: Refsgaard, A.
Danish Hydraulic Institute
Agern Alle 5, DK-2970 Horsholm, Denmark
Model Developed for: general use
Documentation: concepts and theory, input instructions
Model Testing:
Peer Review: concepts
Availability: proprietary, license
Computer requirements: compiler
Abstract:
The WATBAL {WATer BALance) hydrological modeling system is designed to
utilize spatial input data, particularly satellite data. The basis of the
model are so-called hydrological units, grid cells that are similar with
respect to meteorological input, vegetation type, soil type, etc. The
hydrological model includes algorithms for snow accumulation and snow
melt, canopy interception and evaporation of intercepted precipitation,
plant transpiration and evaporation from soil surface, infiltration and
overland flow, deep percolation and stream flow generation. Infiltration
is either based on the Mein and Larson equation (modified Green and Ampt),
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or based on infiltration capacity. Deep percolation or interflow takes
place when the water content of root zone of a hydrological unit exceeds
field capacity. Subsurface routing is based on the principle of linked
linear reservoirs with two outlets.
IGWMC Key: 7230 Model name: E4CHSM (including EXSOL)
Model category: hydrogeochemical, multimedia exposure
Authors: Rohleder, H.,
Schernewski,
Current version:
Release date: 1989
First released: 1986
, M. Matthies,
and S. Trapp
R. Bruggemann, B. Munzer,
IGWMC Check-date: 12/93
Institution of Model Development: Gesellshaft fur Strahlen und
Umweltforschung Munchen
Neuherberg, Germany
Code Custodian: Gesellschaft fur Strahlen und Umweltforschung Munchen
Projekt Gruppe Umweltgefahrdungspotentiale von
Chemikalien, Ingolstadter Landstrasse 1, D-8042
Neuherberg, Gemany
Model Developed for: research, general use
Documentation;	concepts and theory
Model Testing:	laboratory data sets, code intercomparison, field
testing
Peer Review:	concepts and mathematical framework
Availability:
Computer requirements.*
Abstract:
The E4CHEM (Exposure and Eeotoxicity Estimation for Environmental
CHEMicals) model system is developed for the exposure and hazard
assessment of environmental chemicals. E4CKEM comprises a set of 7
models: 1) RLTEC-source assessment model for assessment of release rate
and release medium; 2) EXAIR-analytical box model for atmospheric
transport; 3) EXWAT-steady-state compartment model for transport and fate
in surface waters; 4) EXSOL-multi-layer soil model for one-dimensional
vertical transport and fate in the unsaturated zone; 5)
EXTND-thermodynamic equilibria between air, water and soil; 6) EXINT-model
to combine results of RLTEC, EXAIR, EXWAT, and EXSOL; and 7)
EXATM-compartment model for global atmospheric dispersion. EXSOL includes
adveetion, dispersion, partitioning between soil water and air, sorption
on organic matter, ionization equilibrium, diffusion in soil air
volatilization, biotic and abiotic degradation, and root uptake.
IGWMC Key: 7500 Model name: CTRAN/W SEEP/W
Model category: saturated flow, solute transport
Authors:
Current version:
Release date: 1991
First released:	IGWMC Check-date; 02/94
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Institution of Model Development: Geo-Slope International
Calgary, Alberta, Canada T2P 2Y5
Code Custodian: Geo-Slope International
#830, 633 - 6th Avenue S.W., Calgary,
Alberta, Canada T2P 2Y5
Model Developed for: general use
Documentation:
Model Testing:
Peer Review:
Availability; proprietary
Computer requirements: Intel B0386 based computer, Windows 3.0, 2 MB HAM,
60 MB disk space, EGA
Abstract:
CTRAN/W and SEEP/W are finite-element analysis software for modeling
contaminant transport through soil and rock. The two packages are used
together. SEEP/W computes the water velocity, water content, and water
flux. CTRAN/W uses these parameters to compute the contaminant migration.
They model particle tracking, diffusion, dispersion, adsorption, and
radioactive decay, including simultaneous saturated and unsaturated flow,
steady-state and transient water flow conditions, transient hydraulic
boundary conditions, and anisotropic and heterogeneous aquifer conditions.
SEEP/W analyzes geotechnical engineering seepage and pore-water seepage
dissipation problems, including effects of subsurface drains and injection
wells, drawdown of a water table due to pumping from an aquifer, and
mounding of the ground-water table beneath water retention structures such
as lagoons and tailing ponds.
IGWMC Key: 7690 Model name: WELLFRAC
Model category* saturated flow
Authors: Runchal, A.K.
Current version:
Release date: 01/92
First released:	IGWMC Check-date: 02/94
Institution of Model Development: Analytic and Computational Research,
Inc., Bel Air, Calif.
Code Custodian: Runchal, A.K.
Analytic and Computational Research, Inc.
1931 Stradella Road, Bel Air, CA 90077
Model Developed for: general use, research
Documentation:
Model Testing:
Peer Review:
Availability: proprietary
Computer requirements: compiler
Abstract:
WELLFRAC is a well performance and well-bore performance simulator. It
helps users examine permeability enhancement due to perforation design
and to design wellbore tunnel location, geometry, and frequency for
optimum performance. It solves three-dimensional fractured media flow
equations in cylindrical or Cartesian coordinates. The flow equations can
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be coupled to heat transfer equations to study the effects of temperature
variations on effective permeability.
IGWMC Key: 7950 Model name: RISKPRO
Model category: multimedia exposure, unsaturated flow and solute
transport, saturated zone solute transport
Authors:
Current version.:	2.1
Release date:	1993
First released:	12/92	IGWMC Check-date: 06/94
Institution of Model Development: General Sciences Corporation
6100 Chevy Chase Drive, Laurel, MD 20707
Code Custodian: John Thomas
General Sciences Corporation, SAIC
6100 Chevy Chase Drive, Laurel, MD 20707
Model Developed for: general use
Documentation:
Model Testing:
Peer Review:
Availability: proprietary
Computer requirements: IBM PC/XT, 640 Kb RAM, EGA/VGA graphics.
Abstract:
RISKPRO is an exposure assessment system developed by General Sciences
Corporation of Laurel, Maryland. It is designed for use on the IBM XT,
AT, PS2, and 386 machines. RISKPRO incorporates the same models used by
EPA to evaluate a toxic chemical's behavior when released to the air,
soil, surface and ground water. The software package also includes
several data bases required to run the models which contain information on
toxic chemicals, climate, soil, and population distribution. The RISKPRO
system is composed of user interface which controls the simulation codes.
The simulation codes include programs for: estimating chemical data; air
modeling (ISCLT and PTPLU) ,• vertical transport of chemicals through the
unsaturated zone (SESOIL); solute transport in groundwater (AT123D);
predicting the fate of organic chemicals m surface water (3XAMS-II); and
multi-media partitioning of chemicals (ENPART).
IGWMC Key: 7980 Model name: GIS\Key
Model category: data base, GIS, model interface
Authors: Stevens, K.
Current version:
Release date: 1994
First released: 1993	IGWMC Check-date: 06/94
Institution of Model Development: GIS\Solutions, Inc.
Concord, California
Code Custodian: Ken Stevens
GIS\Solutions, Inc.
1600 Sutter Street, Suite 830, Concord, CA 94520
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Model Developed for: general use
Documentation:
Model Testing:
Peer Review:
Availability: license
Computer requirements:
Abstract:
GIS\Key is an environmental data base management system with sophisticated
report facilities and model interfacing. The system, specially designed
for chemical, geological and hydrological data, integrates data evaluation
and graphic reporting in a Windows environment. The system supports the
digital line graph map series of the USGS, and interfaces with the MODFLOW
three-dimensional flow model. Output includes various table formats and
geologic cross-sections, boring logs, potentiometric maps, isopleth maps,
structure maps, summary tables, hydrographs, and chemical time series
graphs, among others. Input is supported by user-friendly forms.
IGWMC Key: - 8000 Model name.* SitePlanner
Model category: expert system
Authors:
Current version:
Release date:
First released: 1992	IGWMC Check-date: 06/94
Institution of Model Development: ConSolve, Inc.
Lexington, Mass.
Code Custodian: Consolve, Inc.
Lexington, Kentucky
Model Developed for: general use
Documentation:
Model Testing:
Peer Review:
Availability: proprietary
Computer requirements;
Abstract:
SitePlanner is a working environment for site remediation which provides
easy data integration capabilities, and the ability to quickly and simply
visualize, display and manipulate environmental site data. SitePlanner
supports the capability to output and link this data to extern
applications for further analysis. With SitePlanner, all data relating to
a site are stored within a structured model of space and linked to
analytical applications and other utilities. Since SitePlanner stores
information in a spatial model, not in the specific views, alterations to
the model are broadcast to all views and associated features.
IGWMC Key: 8010 Model name: DIVAST
Model category: solute transport
Authors: Dillon, P.J.
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Current version:
Release date:
First released: 1989
IGWMC Check-date: 06/94
Institution of Model Development: CSIRO, Inst, of Natural Resources and
Environm., Div. of Water Resources,
Glen Osmond, South Australia
Code Custodian: P.J, Dillon
CSIRO, Inst, of Natural Resources and Environm., Div. of
Water resources, Private Bag 2, Glen Osmond, SA 5064,
Australia
Model Developed for: general use
Documentation: concepts and theory
Model Testing:
Peer Review;
Availability:
Computer requirements:
Abstract:
An analytical two-dimensional model of solute transport along a vertical
cross section of an aquifer is described. The model extends analytical
methods to two-dimensional dispersive solute transport in a
two-dimensional flow field which until now has been the exclusive
province of numerical models. This avoids the very significant problems
of numerical instability and numerical dispersion facing the application
of numerical transport models at a regional scale. Furthermore, the model
is simple and very fast. A novel feature is the segregation of
longitudinal and transverse transport components. The model is intended
for preliminary evaluation of groundwater quality on a regional scale in
areas subject of diffuse sources of contamination. It gives vertical
resolution of contaminant concentrations through the aquifer thickness.
IGWMC Key: 8020 Model name: HPP-GMS
Model category: saturated flow, pre-/postprocessing
Authors: Blaschke, A.P. and G. Bloschl
Current version:
Release date:
First released: 1992	IGWMC Check-date: 06/94
Institution of Model Development: Institut fur Hydraulik, Technische
Universitat Wien, Vienna, Austria
Code Custodian: Institut fur Hydraulik, Technische Universitat Wien
Karlsplatz 13, A-1040, Vienna, Austria
Model Developed for
Documentation
Model Testing
Peer Review
Availability
Computer requirements
general use
code/modules description
proprietary
Intel 803 86 based computer, 2 Mb RAM, DOS 3.1, GKS
graphics; compiler for other platforms
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Abstract:
HPP-GMS stands for Hydrologic Pre/Postprocessor-Groundwater Modelling
System. HPP-GMS consists of three fully integrated modules. The
preprocessing module provides capabilities of specifying input data. This
includes importing and displaying topographic information, generating a
finite element mesh, editing its geometry, editing and assigning element
and nodal attributes; and preprocessing menu. The solution module is
based on a two-dimensional finite element model which uses the Galerkin
method for a triangulated irregular network. The model is capable of
simulating both steady and non-steady flow in inhomogeneous anisotropic
aquifers. The postprocessing module comprises features for analyzing and
presenting the results. These include contour lines of head and head
differentials. Velocity and streamline plots can also be generated.
IGWMC Key; 8030 Model name:' PCTRANS
Model category: solute transport
Authors:
Current version: 1,0
Release date: 10/93
First released:	IGWMC Check-date: 06/94
Institution of Model Development: unknown
Code Custodian: Electric Power Software Center
Electric Power Research Inst.
P.O. Box 10412, Palo Alto, CA 94303 9743
Model Developed for: policy-setting, general use
Documentation: code/modules description
Model Testing:
Peer Review:
Availability: copy-righted
Computer Recjuirements: Intel 80386 based computer, math coprocessor, 4 Mb
RAM, Microsoft mouse, VGA graphics, DOS 5.0 or higher
Abstract:
PCTRANS is a groundwater flow and contaminant transport code with a
user-friendly interface that greatly simplifies development of groundwater
models for site assessments, facility permitting, remediation studies, and
groundwater impact investigations, PCTRANS is applicable at sites with
complex hydrogeology resulting from variably saturated or heterogeneous
media, transient flow, and irregular flow boundaries. PCTRANS is a
two-dimensional finite-element flow and solute transport model for
variably or fully saturated porous media. It can model either areal or
cross - sectional views.
Remarks:
Model Assumptions: No species interactions, linear partitioning,
first-order decay kinetics
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IGWMC Key: 8040 Model name: MANAGES
Model category: data base
Authors:
Current version: 1.0
Release date:	10/93
First released:	1993	IGWMC Check-date: 06/94
Institution of Model Development: unknown
Code Custodian: Electric Power Software Center
Electric Power Research Inst.
P.O. Box 10412, Palo Alto, CA 94303-9743
Model Developed for: general use
Documentation:
Model Testing:
Peer Review;
Availability: copy-righted
Computer Requirements: Intel 80386 based computer, 560 Kb RAM, VGA, DOS 3.0
or higher
Abstract:
MANAGES is a customized database program for management and interpretation
of water quality data. It allows rapid comparison of water quality data
to regulatory permit limits, statistical trend analysis, and two-well
comparisons of background and compliance monitoring data. MANAGES is used
to store and analyze data collected at power plants, waste management
facilities, coal tar sites, and other locations where groundwater and
surface water data are collected. Types of data stored include: facility
name and location; data entry limits; facility permit limits; well types,
locations, installation, and construction details; sampling dates and
methods; and analysis methods and results.
Remarks:
Statistical analysis methods include: mean, standard deviation, skewness;
linear regression; sen estimate of slope; Mann-Kendall test for Sen slope
significance; Kruskal-Wallis test for seasonality; student t- test for
median comparison; Mann-Whitney test for median comparison; normality test.
IGWMC Key: 8100 Model name; PRINCE (Princeton Analytical Models)
Model category: saturated flow, solute transport
Authors: Cleary,	R. and M. Ungs
Current version:	1.0
Release date:	1994
First released: IGWMC Check-date: 06/94
Institution of Model Development: Princeton Groundwater Software
Alameda, Calif.
Code Custodian: M.J. Ungs
Princeton Groundwater Software
909 Marina Village Parkway Suite 412
Alameda, CA 94501
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Model Developed for: general use
Documentation:
Model Testing:
Peer Review:
Availability: proprietary
Computer Requirements: IBM PC/AT, 640 Kb RAM, EGA/VGA graphics, dot matrix
or HP laser printer
Abstract:
PRINCE is a software package of 10 analytical models originally developed
by Bob Cleary and Mike Ungs as part of an EPA 208 study. The are seven
one-, two-, and three-dimensional mass transport models and three
two-dimensional flow models. The models assume homogeneous, isotropic,
steady-state conditions. The flow models can address well spacing and
capture zone problems with a simple treatment of recharge/barrier boundary
conditions. The mass transport models can address problems m a unxf onr.
velocity field and can consider dispersion, linear retardation and decay.
Continuous, slug, or time-dependent point and areal sources can be
simulated. These models have been rewritten from the original mainframe
FORTRAN codes in graphics rich C. Two additional analytical models have
been added to the original collection, and the ability to import digitized
or AutoCAD-produced DXF site map files has been added. The results is a
menu-driven package with built-in high resolution graphics for X-Y, 2-D
contour and 3-D surface pl-ots.
Remarks:
Selected features of PRINCE: one-, two-, and three-dimensional
advective-dispersive mass transport with first order decay and linear
retardation; two-dimensional strip and Gaussian source mass transport with
advection, dispersion first order 'decay and linear retardation;
Wilson-Miller solution for injection of mass in multiple injection wells;
two dimensional anisotropic Theis solution for multiple
injection-extraction wells; and two-dimensional Hantush-Jacob solution for
a leaky, anisotropic confined aquifer with cross-derivative terms.
IGWMC Key: 8110 Model name: ECLIPSE
Model category: multiphase flow, porous media
Authors:
Current version:
Release date:
First released:	IGWMC Check-date: 06/94
Institution of Model Development: intera Information Technologies,
Petroleum Production Division
Abingdon, Oxfordshire, United Kingdom
Code Custodian: Intera Information Technologies,
Petroleum Production Division
11 Foxeombe Court, Wyndyke Furlong,
Abingdon Business Park, Abingdon
Oxfordshire 0X14 10Z United Kingdom
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Model Developed for; general use
Documentation: code/modules description
Model Testing; benchmarking (analyt, solutions), field testing
Peer Review:
Availability: copy-righted
Computer requirements: Intel 80386 based computer, 16 Mb RAM, VGA graphics,
math coprocessor
Abstract:
ECLIPSE is an advanced, new generation reservoir simulator originally
developed for the petroleum industry but can be used to handle various
engineering problems. With highly efficient and robust solution
techniques and numerous advanced capabilities, the program simulates flow
and transport in multi-dimensional, multi-component, multiphase, and
heterogeneous (stratified media, fractures, faults, random fields, etc.)
systems. The software package offers many options for special
applications. While possessing abilities to model comprehensive systems,
ECLIPSE can also be easily reduced to model simple systems. The pre™ and
post-processors of ECLIPSE provide a flexible user-interface and
interactive subsurface mapping capabilities and analysis of results.
ECLIPSE has been tested through many users of commercial applications and
results have been verified by actual field observations.
IGWMC Key; 813 0 Model name: FLOTRANS
Model category: solute transport
Authors: Franz, T.
Current version: 2.0
Release date: 1993
First released:	IGWMC Check-date: 06/94
institution of Model Developments Waterloo Hydrogeologic Software
Bolton, Ontario, Canada
Code Custodian; Franz, T.
Waterloo Hydrogeologic Software
19 McCauley Drive, - RR#2, Bolton, Ontario, Canada L7E 5R8
Model Developed for: general use
Documentation:
Model Testing:
Peer Review:
Availability: proprietary
Computer requirements: Intel 80386 based computer, 4 Mb RAM, DOS 3.1,
EGA/VGA graphics, math coprocessor, mouse
Abstract:
FLOTRANS is an extension of FLONET. It adds a transient
advective-dispersive solute transport capability. It computes heads,
velocities, and contaminant concentrations in a vertical section through a
confined or unconfined aquifer. The model can simulate flow and solute
transport in heterogeneous and anisotropic porous media under complex
boundary conditions. As with FLONET, spatially variable recharge rates
can be taken into account; for unconfined aquifers the model seeks the
water table iteratively and the grid is deformed automatically.
Biodegradation and chemical transformation processes can be represented by
a first-order decay function. Different decay rates can be applied to the
source and to the contaminant within the aquifer. Adsorption can be
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represented through linear retardation. Spatially variable initial
concentrations and internal contaminant sources can be considered,
FLOTRANS is a self contained package where all data input and output is
done via an interactive graphical user interface. This interface
facilitates the display of the grid, head and concentration contours,
hydrographs, flowlines, velocity vectors, and breakthrough curves. The
user friendly interface makes the design and modification of highly
complex models extremely easy. The program interfaces with many other
models and graphics packages including AutoCad.
IGWMC Key; 8170 Model name: SL'JGT
Model category: aquifer test analysis
Authors: Mills, A.
Current version: 5.0
Release date: 03/92
First released:	IGWMC Check-dates 07/94
Institution of Model Development: various
Code Custodian: A .Mills {check with IGWMC)
Model Developed for:	general use
Documentation:	input instructions
Model Testing:
Peer Review:
Availability:	non-proprietary
Computer requirements:	IBM PC/AT, 640 Kb RAM, DOS 3.1
Abstract:
The program SL'JGT computes hydraulic conductivity values based on the
analysis of slug tests. Included are three commonly used methods for slug
test analysis: Cooper, Bredehoeft and Papadopulos; Bouwer and Rice; and
Hvorslev. In addition effects due to air entrapped in the completion
region of a piezometer are estimated using the method of Keller and van
der Kamp as a computation option. Data input and output may be in metric
(SI) unit or inch-pound units. Output includes tables summarizing input
data and results, and data plots. In order to account for early time
effects of the gravel pack on the results, the user may plot reduced data
or edit the input data in advance. This menu-driven program facilitates
interactive data entry and editing and allows saving the input data and
the results to disk files. The program can handle up to 300 time-drawdown
pairs.
IGWMC Key: 8190 Model name: SPILLTRANS
Model category: multiphase flow, solute transport
Authors:
Current version: 1.0
Release date:	1993
First released:	1993	IGWMC Check-date: 07/94
Institution of Model Development: Environmental Systems & Technologies,
Inc., Blacksburg, Virginia
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Code Custodian: Parker, J.C.
Environmental Systems & Technologies, Inc.
2608 Sheffield Drive, Blacksburg, VA 24060
Model Developed for: general use
Documentation:
Model Testing:
Peer Review:
Availability: proprietary
Computer requirements: Intel 80486 based computer, 8 Mb RAM, hard drive
with 4 Mb free space, math coprocessor, Microsoft
mouse, VGA graphics
Abstrac t:
SPILLTRANS is a 2-D numerical solute transport and multiphase flow model
for analyzing complex LNAPL contamination sites. It can handle up to 5
dissolved species, convective-dispersive transport, adsorption,
first-order decay and volatilization, inhomogeneities, recharge, pumping,
and complex source configurations. SPILLTRANS is a vertically-averaged
model for dissolved transport of up to 5 species in an unconfined aquifer.
In addition to conventional source rate definition by the user,
SPILLTRANS can internally compute a time - dependent source rate due to
dissolution from free phase hydrocarbon and considers
convective-dispersive transport, adsorption, first-order decay and
volatilization. Ground-water velocities and hydrocarbon distribution may
be imported from SPILLCAD or ARMOS. The program includes database and
graphics modules. The heart of SPILLTRANS is a graphical database that
enables fluid level, monitoring well and soil boring data to be posted or
contoured on site maps at any scale. Time series and other X-Y graphs may
be used to evaluate trends and relationships among measurements. The
program includes soil and chemical property estimators, supports
rectangular, quadrilateral and triangular meshes, and can simulate areally
distributed recharge and/or ground-water pumping. SPILLTRANS includes
menu-driven pre- and post-processing programs. This user interface
provides the ability to.import CAD (DXF- format) base maps as well as data
from spreadsheet programs. The graphical database system has the ability
to store and retrieve fluid level, dissolved concentration and soil boring
data; and perform relational database queries for user-defined search
criteria. The program will produce custom graphic output on a base map;
overlays of sample location, data values, contours and gradient plots.
The program can also produce time series plots of well hydrographs,
dissolved concentrations, etc.
IGWMC Key: 8360 Model name: GEOBASE
Model category: data base
Authors: Hall, P.
Current version: 7.01
Release date: 1994
First released:	IGWMC Check-date: 10/5/94
Institution of Model Development: Earthware of California
Laguna Niguel, Calif.
Code Custodian: Phil Hall
Earthware of California
30100 Town Center Drive, #196, Laguna Niguel, CA 92677
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Model Developed for: general use
Documentation: input instructions/ example problems
Model Testing;
Peer Review:
Availability: proprietary, license
Computer requirements: IBM PC/AT, 640 Kb RAM {Intel 80386 based computer
with 4 Mb recommended), DOS 5.0
Abstract:
GEOBASE is a ground-water data base system interlinked with various
graphic display programs, ground-water simulation software, and parameter
estimation programs. The program manages and displays various type of
data, including lithology logs, well construction, stratigraphy (fence
diagrams), chemical analyses (Piper, Stiff, Schoeller, etc.), hydrological
analyses (kriging, timelogs, pumping tests, analytical modeling), and
interfacing with numerical models (MODFLOW, MOC, RANDOM WALK, etc.). The
software includes various display options for two- and three-dimensional
data, including contours, profiles, 3D mesh, flowlines (forwards and
reverse), capture zones, and hydrographs.
IGWMC Key: 8370 Model name: AQUAEM (AQUifer Analytic Element Model)
Model category: saturated flow, porous medium
Authors: Chen, J., and P. Hall
Current version:
Release date: 1994
First released:	IGWMC Check-date: 10/5/94
Institution of Model Development: Earthware of California
Laguna Niguel, Calif.
Code Custodian: Phil Hall
Earthware of California
30100 Town Center Drive, #196, Laguna Niguel, CA 92677
Model Developed for;
Do cumen ta t i on;
Model Testing:
Peer Review:
Availability:
Computer requirements:
Abstract:
general use
concepts and theory, input instructions
proprietary, purchase, copy-righted
Intel 80386 based computer; 2 Mb RAM; 3 Mb disk
space; VGA; printer or plotter
AQUAEM is a groundwater simulation model based on the analytic element
method. It simulates steady-state, saturated flow in homogeneous,
isotropic porous media through superposition of various analytical
solutions (analytic elements). AQUAEM includes the following elements:
head- or discharge-specified wells, head- or discharge-specified
linesinks, rain elements, ponds, and uniform regional flow. The program
displays head contours and forwards and reverse flowlines with time
intervals.
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IGWMC Key: 8400 Model name: EIS/GWM
Model category: geostatistics, saturated and unsaturated flow, solute
transport, porous medium
Authors:
Current version:
Release date: 1994
First released:	IGWMC Check-date: 10/5/94
Institution of Model Development: MicroEngineering Inc.
P.O. Box 1344, Annandale, VA 22003
Code Custodian: MicroEngineering Inc.
P.O. Box 1344, Annandale, VA 22003
Model Developed for: general use
Documentation:
Model Testing:
Peer Review:
Availability: proprietary, purchase
Computer requirements: Intel 80386 based computer, Windows 3.1, DOS 5.0,
VGA graphics
Abstract:
EIA/GWM is a MS Windows based ground-water modeling system for exposure
and remediation studies. It allows three-dimensional simulations using
MODFLOW, MIGRA, and PRZM. It includes options for grid generation,
geostatistics (kriging, error estimation), and importing and exporting of
bi tmap iir.ages.
IGWMC Key: 8440 Model name: BALANCE
Model category: water budget, unsaturated flow
Authors: Wesseling, J.G.
Current version:
Release date: 1992
First released:	IGWMC Check-date: 10/5/94
Institution of Model Development: Winand Staring Centre, Dept. of
Agrohydrology, Wageningen,
The Netherlands
Code Custodian: Winand Staring Centre, Dept. of Agrohydrology
P.O. Box 125, 6700 AC Wageningen, The Netherlands
Model Developed for: general use
Documentation: concepts and theory
Model Testing:
Peer Review: concepts
'Availability: proprietary, purchase
Computer requirements: Intel 80286 based microcomputer, EGA/VGA graphics,
640 KB RAM
Abstract:
The program BALANCE takes the results {moisture content and pressure head
distribution) of numerical flow simulation programs and displays the
output in graphical form. The results of the computations with this water
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balance program are shown day-by-day in animation form. The program works
with various unsaturated flow simulation programs through simple
interfaces. It has been tested with the program SWATRE. Water balance
components displayed include precipitation and infiltration, potential and
actual transpiration, potential and actual evaporation, pressure head
profile, flux to and from drains, flux through the bottom of the profile,
groundwater level, and moisture content profile.
IGWMC Key: 8450 Model name: Site Analyzer
Model category: GIS, risk assessment
Authors:
Current version:
Release date: 1994
First released:	IGWMC Check-date: 10/7/94
Institution of Model Development: unknown
Code Custodian: The Belhaven Group
415 N. Quay, Kennewick, WA 99336-7735
Model Developed for: general use
Documentation:
Model Testing:
Peer Review:
Availability: proprietary, license
Computer requirements: Macintosh 68020 or higher, 4 Mb RAM, 2 Mb free disk
space, floating point processor, O.S. 6.04
Abstract:
Site Analyzer (TM) is a software tool designed for the environmental site
characterization and risk assessment. The program combines a mapping
system for visualizing complex site data with data handling tools for
filtering and extracting specific data. Results may be displayed in map
view as contour plots, skyscraper diagrams, and subsurface core plots, or
as statistical diagrams. Site Analyzer provides tools to edit any maps or
graphs being displayed.
IGWMC Key: 8470 Model name: SiteGIS
Model, category: GIS, data base
Authors: Srinivasan, P.
Current version: 1.1
Release date: 04/94
First released: 1994	IGWMC Check-date: 10/10/94
Institution of Model Development: GeoTrans, Inc,
Sterling, Virginia
Code Custodian: Srinivasan, P.
GeoTrans, Inc.
46050 Manekin Plaza, Suite 100, Sterling, VA 22170
Model Developed for: general use
Documentation: installation, input instructions, example problems
Model Testing:
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Peer Review:
Availability: proprietary, license
Computer requirements: Intel 80386 based computer, 8 Mb RAM, 5 Mb disk
space, DOS 5.0, Windows 3.1, Maplnfo 2.1, Surfer
4.0/Surfer for Windows 1.0, Excel 4.0
Abstract:
SiteGIS (TM> is a user-friendly, Windows-based software package for
analyzing and presenting environmental data for soil and groundwater
remedial investigations within a GIS framework. Groundwater (water level
and water quality data), soil (quality) and geology (well data, borings,
profiles) data bases are integrated with facility or site maps to prepare
data visualization maps, time series charts and geologic sections.
SiteGIS is an application for the Maplnfo (R) desktop mapping package.
For display of data, SiteGIS interfaces directly with Microsoft Excell
(line graphs) and Golden Software Surfer (contours). As an Maplnfo
application, SiteGIS has access to various geographical presentation
tools, an enhanced SQL querying language, and data exchange using DXF,
DBF, XLS, and ASCII file formats. Options are available to translate data
from ARC/INFO, TIGER and DLG formats.
IGWMC Key: 8500 Model name; MULAT
Model category: saturated flow, porous medium
Authors: Verruijt, A.
Current version: 1.5
Release date: 08/94
First released: 1991	IGWMC Check-date: 10/94
Institution of Model Development: Delft Technical Univ., Dept. Civil Eng.
Delft, The Netherlands
Code Custodian: Verruijt, A.
Technical Univ. Delft, Dept. of Civil Eng.
Stevinweg 1, 2628 CN Delft, The Netherlands
Model Developed for: research, general use, education
Documentation: theory, user's guide, examples
Model Testing: verification
Peer Review:
Availability: proprietary, purchase, compiled version only
Computer requirements: Intel 80386 based microcomputer, DOS 5.0, 640 Kb
RAM, CGA/EGA/VGA; uses all available RAM
Abstract:
MULAT is a finite element model for analysis of steady-state groundwater
flow and advective transport. Transport is modeled as the
three-dimensional advective transport of individual particles subject to
retardation due to linear adsorption. The groundwater system may consist
of up to six aquifers, separated by aquitards. In each aquifer, the flow
may be influenced by wells, line drains, line sources and line screens.
The model consists of a package of programs for the generation of input
data and finite element grid, the actual finite element computations, and
presentation of output. Although the flow in the aquifers is
predominantly horizontal and vertical variations of head are discarded,
the vertical component of the velocity is not zero. This component is
calculated frorti the equation of continuity, implying that the vertical
velocity in the aquifer varies linearly with depth. The horizontal and
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vertical velocity components are used for the three-dimensional tracking
of particles.
IGWMC Key: 8510 Model name: ANALYT
Model category: saturated flow, porous medium
Authors: Kolesov, A.A.
Current version:
Release date: 1992
First released: 1991
IGWMC Check-date: 10/94
Institution of Model Development: Computer Division, PNIIIS
Okruzhnoy Proezd, 18, Moscow, 105058
Russia
Code Custodian: A.A, Kolesov
B. Cherikizovskaya Str., 6-4-106, Moscow 107061, Russia
Model Developed for: research, general use, education
Documentation: concepts and theory, example problems
Model Testing:
Peer Review:
Availability: proprietary, purchase
Computer requirements: IBM PC/AT, 400 Kb RAM, MS-DOS 3.3, EGA/VGA;
math-coprocessor optional
Abstract:
ANALYT is an analytical model for simulation of transient flow in a
homogeneous, unconfined aquifer or aquifer-aquitard system. The program
is based on a series of analytical solutions for two- and
three-dimensional recharge and discharge problems. It calculates the
water-table/hydraulic head change due to leaking water mains,
over-irrigation, abandoned wells, drains, etc. The aquifer may be
anisotropic and subject to various conditions along geometrically simple
boundaries. The program supports multiple circular, rectangular or line
sources and sinks. Superposition is used to allow multiple sources/sinks,
variable infiltration/discharge rates, and imaging in case of boundaries.
ANALYT is menu-driven, includes context-sensitive help, and interfaces with
commercial contouring programs, especially SURFSR (Golden Software).
IGWMC Key: 8520 Model name: 1DFEMWATER
Model category: saturated and unsaturated flow
Authors: Yeh, G.T.
Current version:
Release date: 1988
First released: 1988	IGWMC Check-date: 10/94
Institution of Model Development: Oak Ridge Nat. Lab., Environn. Sciences
Div., Oak Ridge, Tennessee 37831
Code Custodian: Yeh, G.T.
Pennsylvania State Univ., Dept. of Civil Eng.
225 Sackett Blag., University Park, PA 16802
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Model Developed for: general use
Documentation: concepts and theory, input instructions, test
examples
Model Testing: code intercomparison, analytical solutions
Peer Review: mathematical framework
Availability: public domain, source code
Computer requirements: compiler
Abstract:
1DFEMWATER is a one-dimensional finite element model for simulation of
flow in saturated-unsaturated media. The model is designed to treat
heterogeneous media consisting of many geologic formations, to consider
distributed and point sources/sinks that are spatially and temporally
variable, and to accept prescribed initial conditions or obtain them from
steady-state simulations. The model deals with transient heads
distributed over the Dirichlet boundary, handle time-dependent fluxes
caused by pressure gradients on the Neumann boundary, and treat
time-dependent total fluxes (i.e., the sum of gravitational fluxes and
pressure-gradient fluxes) on the Cauchy boundary. The model automatically
determines variable boundary conditions of evaporation, infiltration, or
seepage on the soil-air surface. It provides two options for treating the
mass matrix (consistent and lumping), and three alternatives for
approximating the time derivative term. Estimating the nonlinear matrix
can be done by exact relaxation, underrelaxation and overrelaxation. The
model automatically resets the time step when boundary conditions or
sources/sinks change abruptly and checks the mass balance over the entire
region for every time step.
IGWMC Key: 8530 Model name: HSSM (Hydrocarbon Spill Screening Model)
Model category: multiphase flow
Authors; Weaver, J.W., R.J. Charbeneau, J.D. Tauxe, B.K. Lien, and J.B.
Provost
Current version: 1.0
Release date: 04/94
First released: 04/94	IGWMC Check-date: 10/94
Institution of Model Development: U.S. EPA, R.S. Kerr Env, Res. Lab.
Ada, Oklahoma
Code Custodian: J.W.Weaver
U.S. Env. Protection Agency, R.S. Kerr Env. Res. Lab.,
P.O. Box 1198, Ada, OK 74820
Model Developed for: general use
Documentation: concepts and theory, code/modules description,
installation and input instructions, example problems
Model Testing: benchmarking (analyt. solutions), laboratory tests
Peer Review: concepts, mathematical framework, documentation
Availability: public domain
Computer requirements: MS-DOS version: IBM PC/AT, 400 Kb RAM, DOS 5.0,
EGA/VGA; MS-Windows version: Intel 80386 based
computer, 2 Mb RAM, VGA, MS-Windows 3.0, DOS 3.1
Abstract:
HSSM is an interactive, semianalytical model intended for simulation of
subsurface releases of light nonaqueous phase liquids (LNAPLs). The model
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consists of separate modules for LNAPL flow through the unsaturated zone
(KOPT-Kinematic Oily Pollutant Transport), spreading in the capillary-
fringe (OILENS), and transport of dissolved spill components in the water
table aquifer (TSGPLUME-Transient Source Gaussian PLUME model). The
soil/aquifer material is homogeneous. Spreading in the capillary fringe
is assumed radial and not subject to a regional gradient of the water
table. Advective-dispersive transport of dissolved phase in the saturated
zone is subject to regional uniform flow and recharge. The source is
assumed at the soil surface and may be a constant flux source, a volume
source, or a constant head source. The modules KOPT and OILENS provide a
time-variable source condition for the aquifer transport model. HSSM
comes as DOS and Windows version. Graphic output includes saturation
profiles, NAPL lens profiles, NAPL lens radius history, contaminant mass
flux history, NAPL lens contaminant mass balance, receptor concentration
histories. HSSM includes a soil property regression utility to estimate
soil hydraulic properties using the regression equations of Rawls and
Brakensiek (1985). It also includes a utility for calculation of the
NAPL/water partition coefficient based on Raoults law.
IGWMC Key: 8540 Model name: NEWSAM/NEWVAR
Model category: saturated flow, porous media, fresh/salt water flow
Authors; Ledoux, E., G. De Marsely, A. Levassor, S. Sauvagnac, and A.
Rivera
Current version:
Release date: 19S8
First released: 1978	IGWMC Check-date: 10/94
Institution of Model Development: Centre d1Informatique Geologique, Ecole
de Mines de Paris, Fontainebleau, France
Code Custodian: E. Ledoux
Centre d'Informatique Geologique, Ecole des Mines de paris
35, rue Saint-Honore, F-77305 Fontainebleau, France
Model Developed for:	general use, research
Documentation:	concepts and theory, model setup, input
instructions, example problems
Model Testing:	benchmarking (analyt. solutions), field testing
Peer Review:	mathematical framework
Availability:	proprietary
Computer requirements:	compiler
Abstract:
NEWSAM is a two-dimensional finite difference model for simulation of
steady-state and transient flow in heterogeneous, anisotropic,
multilayered aquifer systems. The NEWSAM code uses the point
over-relaxation implicit procedure to solve the FD equations. One of the
principal characteristics of NEWSAM is the use of nested square meshes.
Four squares of different sizes are acceptable, provided that two adjacent
squares have, at most, a factor 2 difference in size. Boundary condition
supported by NEWSAM include time-varying prescribed flux and head, no-flow
and head-dependent flux (recharge form/discharge into streams), It also
supports time-varying recharging/discharging wells and areal recharge.
NEWVAR is an extension of NEWSAM facilitating simulation of simultaneous
flow of fresh and salt water separated by a sharp interface. Leakage to
and from an adjacent aquifer is allowed for the fresh water. The code
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can be used to simulate the twodiraensional movement of the saltwater toe
and to approximate the upconing due to pumping in the fresh water zone.
IGWMC Key: 8550 Model name; PK/PMDIS
Model category: pre-/postprocessing
Authors; Chiang, W-H, and W. Kinzelbach
Current version
Release date
First released
3.0
04/94
1991
IGWMC Check-date: 10/94
Institution of Model Development: Gesamthochschule Kassel-Universitat
FB 14, Moritzstr. 21, D-3500 Kassel, FRG
Code Custodian: Wen-Hsing Chiang
Auf der Bojewiese 52, 21033 Hamburg, Germany
Model Developed for: general use, education
Documentation: concepts, installation and user's instructions,
example problems
Model Testing: performance testing
Peer Review:
Availability: proprietary, purchase
Computer requirements: Intel 80386 based computer, math coprocessor, 550 Kb
free low RAM, 2 Mb extended RAM, MS Mouse, DOS 5.0,
VGA graphics, 5 Mb free disk space
Abstract:
PM is a modeling system for model input preparation, simulation, and
post-simulation analysis. It provides a graphic user interface for the
three-dimensional flow model MODFLOW, the particle tracking program
MODPATH and solute transport program MT3D. Other MODFLOW interfacing
programs are being added. Within the preprocessor part of PM a DXF format
digitized map can be drawn, imported, edited, and saved. The model grid
is overlayed on this map and areally distributed data can be specified in
form of zones or contours on this map. The postprocessing includes
conversion of cell-by-cell flow terms from MODFLOW into ASCII files, used
by postprocessing modules to compute water balances for arbitrary
subregions; 3D pathlines resulting from MODPATH; contour plotting for
MODFLOW and MT3D results; and line graphs for head and concentration
versus time for selected locations. Graphic output is displayed on
screen, or saved in HPGL or DXF format. Output is also generated in
SURFER compatible format. PMDIS is an optional modification of the
program PM adding capabilities for kriging and other methods for assigning
values to model cells for areally distributed parameters.
IGWMC Key: 8560 Model name: ABCFEM
Model category: saturated flow, solute transport
Authors: Brown, A., and R. Hertzman
Current version: 4.5.3
Release date: 09/94
First released: 1993	IGWMC Check-date: 10/94
Institution of Model Development: Adrian Brown Consultants, Inc.
Denver, CVolorado
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Code Custodian:
Adrian Brown
Adrian Brown Consultants, Inc.
155 S. Madison Str., Suite 302, Denver, CO 80209-3013
Model Developed for:
Documentation:
Model Testing:
Peer Review:
Availability:
Computer requirements:
Abstract:
general use, education
concepts and theory, installation and user guide,
example and verification problems
benchmarking (analyt. solutions), field testing
concepts, mathematical framework, applications
proprietary, license
IBM PC/AT, 640 Kb RAM, DOS 3.3, 2Mb hard disk space,
CGA/EGA/VGA graphics, math coprocessor; program uses
extended memory/protected mode if available; mouse
optional
ABCFEM is a two-dimensional, finite element, flow and transport model for
horizontal, cross-sectional or radial model geometries. The flow problem
is solved using a modified Gauss-Seidel iterative finite element approach
and the transport problem is solved using a Random Walk approach. The
model supports both steady-state and transient analyses. Boundary
conditions handled by the program include fixed flow, fixed head, forced
inflow, infiltration and swamping. For unconfined systems, a moving
phreatic surface can be simulated allowing for mixtures of confined and
unconfined nodes (as long as confined nodes remain fully saturated). The
model allows for variable rate pumping, stream-aquifer interaction, and
springs, ABCFEM is entirely menu-driven, has an extensive graphic
user-interface for data input, mesh generation, data editing, and graphic
display of results. Output include DXF and contouring-packages compatible
formats. Input can be saved in spreadsheet format {Lotusl-2-3 compatible).
IGWMC Key: 8570 Model name: PHREEQM-2D
Model category: hydrogeochemical, solute transport
Authors: Willemsen, A.
Current version: 2.01
Release date: 04/94
First released: 1992	IGWMC Check-date: 10/94
Institution of Model Development: IF Technology
Arnhem, The Netherlands
Code Custodian: A. Willemsen
IF Technology, Arnhem, The Netherlands (contact IGWMC)
Model Developed for: general use
Documentation: concepts and theory, module descriptions,
installation and input instructions, example problems
Model Testing;
Peer Review:
Availability: proprietary, purchase
Computer requirements: Intel 80386 based computer, math coprocessor, 2 Mb
free RAM, DOS 5.0, VGA graphics, 4 Mb free disk space
Abstract:
PHREEQM-2D is a multicomponent mass transport model consisting of two
coupled simulation programs: HST2D and PHREEQE. PHREEQE is a geochemical
reaction model developed by the U.S. Geological Survey. PHREEQM-2D
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includes dissolution, precipitation, and ion exchange, and supports
kinetic computations for one mineral. HST2D is a finite difference model
for density-dependent ground-water flow and associated heat and solute
transport in two-dimensional saturated configurations, based on the HST3D
model of the U.S. Geological Survey. It includes advection/convection,
(heat) conduction, dispersion, first-order decay, and retardation. The
three governing equations (flow, and heat and solute transport) are
coupled through the interstitial pore velocity, the dependence of the
fluid density on pressure, solute mass and temperature, and the dependence
of viscosity on temperature and solute mass-fraction. HST2D handles a
variety of time-varying source and sink terms and boundary conditions,
including fixed pressure, temperature and concentration, given water-,
heat-, and solute-flux, and leakage boundary conditions. Both HST2D and
PHREEQM-2D are menu-driven and contains interactive input and editing
facilities. Output can be processed using spreadsheet and commercial
graphic programs.
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Appendix D. Software references sorted by IGWMC Key
IGWMC Key:	21	Model name: UNSAT2
Neuman, S. P., R. A. Feddes, and E. Bresler. 1974. Finite Element
Simulation of Flow in Saturated-Unsaturated Soils Considering Water Uptake
by Plants. 3rd Ann. Rept. Project A10-SWC-77, Hydrodynamics and
Hydraulics Engineering Lab., Technion, Haifa, Israel,
Neuman, S. P., R. A. Feddes, and E. Bresler. 1975. Finite Element
Analysis of Two-Dimensional Flow in Soils Considering Water Uptake by
Roots; 1. Theory. Soil Sci. Soc. Am., Proceed. Vol. 39(2), pp. 224-230.
Davis, L.A, and S.P. Neuman. 1983. Documentation and User's Guide:
UNSAT2-Variably Saturated Flow Model. NUREG/CR-3390, U.S. Nuclear
Regulatory Commission, Washington, D.C.
IGWMC Key:	25	Model name: FLUMPS
Narasimhan, T.N., S.P.Neuman, and P.A. Witherspoon. 1978. Finite Element
Method for Subsurface Hydrology Using a Mixed Explicit-Implicit Scheme.
Water Resources Research, Vol. 14, pp. 863-877.
Neuman, S. P., C. Preller and T,N. Narasimhan, 1982. Adaptive
explicit-implicit quasi three-dimensional finite element model of flow and
subsidence in multi-aquifer systems. Water Resources Research
18 (5) :1551-1561.
IGWMC Key:	80	Model name: COMPAC
Helm, D.C. 1975. One-Dimensional Simulation of Aquifer System Compaction
near Pixley, California, 1. Constant Parameters. Water Resources
Research, Vol. 11(3), pp. 465-478.
Helm, D.C. 1976. On-Dimensional Simulation of Aquifer - System Compaction
near Pixley, California, 2. Stress-Dependent Parameters. Water Resources
Research, Vol. 12(3), pp. 375-391.
Helm, D.C. 1977. Estimating Parameters of Compacting Fine-Grained
Interbeds within a Confined Aquifer System of One-Dimensional Simulation
of Field Observations. In: Proceed. Internat. Symposium on Land
Subsidence, Anaheim, Calif., 1976. Internat. Assoc. Hydrological
Sciences, Publ. 121, pp. 145-156.
Helm, D.C. 1978. Field Verification of a One-Dimensional Mathematical
Model for Transient Compaction and Expansion of a Confined Aquifer System,
In: Proceedings Specialty Conference on Verification of Mathematical and
Physical Models in Hydraulic Engineering, College Park, Maryland, pp.
189-196. Am. Soc., Civil Eng., New York.
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IGWMC Key:	100
Model name: CCC
Lippmann, M.J., T.N. Narasimhan and P.A. Witherspoon. 1976. Numerical
Simulation of Reservoir Compaction in Liquid Dominated Geothermal Systems.
In: Proceed. Second Internat. Symp. on Land Subsidence, Anaheim, Calif.,
Dec. 10-17, 1976. Internat. Assoc. Hydrol. Sc., Publ. 121, pp. 179-188.
Lippmann, M.J. and D.C. Mangold. 1977. Preparation of Input Data for
Program CCC (April 1977 version). Lawrence Berkeley Laboratory, Earth Sc.
Div., Univ. of Calif., Berkeley, Calif.
Lippmann, M.J., C.F. Tsang and P.A. Witherspoon. 1977. Analysis of the
Response of Geothermal Reservoirs under Injection and Production
Procedures. Paper SPE 6537, 47th Ann. Calif. Regional Mtg. of SPE/AIME,
Bakersfield, Calif., April 13-15, 1977. LBL-6328, Lawrence Berkeley Lab.,
Univ. of Calif., Berkeley, Calif.
Mangold, D.C., C.F. Tsang, M.J. Lippmann and P.A. Witherspoon. 1979. A
Study of Geothermal Effects in Well Test Analysis. Paper SPE B232, 54th
Ann. Fall Techn. Conf. and Exhib. of SPE/AIME, Las Vegas, Nevada, Sep,
23-26, 1979. LBL-9769, Lawrence Berkeley Lab., Univ. of Calif., Berkeley,
Calif.
Mangold, D.C., M.J. Lippmann and G.S. Bodvarsson. 1980. Computer Program
CCC User's Manual; Version 2. LBL-10909, Lawrence Berkeley Lab., Univ. of
Calif., Berkeley, Calif.
IGWMC Key:	120	Model name: TRUST
Narasimhan, T.N. and P.A. Witherspoon. 1976. An Integrated Finite
Difference Method for Fluid Flow in Porous Media. Water Resources
Research, Vol. 12(1), pp. 57-64.
Narasimhan, T.N. and P.A. Witherspoon. 1977. Numerical Model for
Saturated-Unsaturated Flow in Deformable Poruous Media; I. Theory. Water
Resources Research, Vol. 13 {3}; pp. 657-664.
Narasimhan, T.N., P.A. Witherspoon, and A.L. Edwards. 1978. Numerical
Model for Saturated-Unsaturated Flow in Deformable Porous Media; II. The
Algorithm. Water Resources Research, Vol. 14(2), pp. 255-261.
Narasimhan, T.N., and P.A. Witherspoon. 1978. Numerical Model for
Saturated-Unsaturated Flow in Deformable Porous Media; III. Applications.
Water Resources Research, Vol. 14(6), pp. 1017-1034.
Narasimhan, T.N. 1979. The Significance of the Storage Parameter in
Saturated-Unsaturated Groundwater Flow. Water Resources Research, Vol.
15 (3), pp. 569-576.
Reisenauer, A.E., K.T. Key, T.N. Narasinhan, and R.W. Nelson. 1982.
TRUST: A Computer Program for Variably Saturated Flow in Multidimensional,
Deformable Media. NUREG/CR-2 360, U.S. Nuclear Regulatory commission,
Washington, D.C. (PNL-3975).
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McXeon, T.J., S.W. Tyler, D.W. Mayer, and A.E. Reisenauer. 1983.
TRUST-II Utility Package; Partially Saturated Soil Characterization, Grid
Generation, and Advective Transport Analysis. NUREG/CR-3443, U.S. Nuclear
Regulatory Commission, Washington, B.C.
Peterson, D.M., and J. Wilson. 1988. Variably Saturated Flow Between
Streams and Aquifers: Technical Completion Report Project No 233, New
Mexico Water Resources Research Institute, New Mexico State University,
Las Cruces, New Mexico. [Contains discussion and application of code].
IGWMC Key:	121	Model name: TERZAGI
Narasimhan, T.N. 1980. Program TERZAGI User's Manual. Kept. LBL-10908,
Draft. Lawrence Berkeley Laboratory. University of California, Berkeley,
Calif.
Narasimhan, T.N., S.P.Neuman, and P.A. Witherspoon. 1978. Finite Element
Method for Subsurface Hydrology Using a Mixed Explicit-Implicit Scheme.
Water Resources Research, Vol. 14, pp. 863-877.
Narasimhan, T.N. and P.A. Witherspoon. 1976. Numerical Model for
Subsidence in Shallow Groundwater Systems. In: Proceed, of the Anaheim
Symposium, IAHS Pub. 121, pp. 133-143. Internat. Assoc. of Hydrological
Sciences.
see also IGWMC Key # 120
IGWMC Key:	122	Model name: FLUMP
Narasimhan, T.N., S.P. Neuman, and A.L. Edwards. 1975. Mixed
Explicit-Implicit Iterative Finite Element Scheme for Diffusion-Type
Problems; II. Solution Strategy and Examples. Rept. 4406, Lawrence
Berkeley Laboratory, Berkeley, Calif, (also published in Internat. J. for
Numerical Methods in Engineering).
Neuman, S.P. and T.N. Narasimhan. 1975. Mixed Explicit - Implicit
Iterative Finite Element Scheme for Diffusion Type Problems; I. Theory.
Rept. 4405, Lawrence Berkeley Laboratory (also published in Internat. J.
for Numerical Methods in Engineering).
Neuman, S.P., T.N. Narasimhan, and P.A. Witherspoon. 1976. Application
of Mixed Explicit-Implicit Finite Element Method to Nonlinear
Diffusion-Type Problems. In: Proceed. Internat. Conf. on Finite Elements
in Water Resources, Princeton University, Princeton, New Jersey, July
12-16, 1976.
IGWMC Key:	160	Model name: SCHAFF
Sorey, M.L. 1975. Numerical Modeling of Liquid Geothermal Systems, USGS
Open File Report 75-163, U.S. Geological Survey, Menlo Park, Calif.
Lippmann, M.J. 1976. Preparation of Input Data for Program SCHAFF.
Internal Document (UCID)-3853, Lawrence Berkeley Laboratory, Univ. of
Calif., Berkeley, Calif.
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Edwards, A.L. 1972. TRUMP - A Computer Program for Transient and Steady
State Temperature Distributions in Multi-Dimensional Systems. UCRL-14574,
Rev. 3, University of California Radiation Laboratory, Lawrence, Calif.
IGWMC Key:	195	Model name; NON-LINEAR FE/FD REGRESSION
GROUNDWATER FLOW MODEL
Cooley, R.L., and P.J. Sinclair, 1976. Uniqueness of a Model of
Steady-State Ground Water Flow. J. Hydrology, Vol. 31, pp. 245-269.
Cooley, R.L. 1977. A Method of Estimating Parameters and Assessing
Reliability for Models of Steady-State Ground Water Flow; 1. Theory and
Numerical Properties. Water Resources Research, Vol. 13(2), pp. 318-324.
Cooley, R.L. 1979. A Method of Estimating Parameters and Assessing
Reliability for Models of Steady-State Ground Water Flow, 2. Application
of Statistical Analysis. Water Resources Research, Vol. 15(3), pp.
603-617.
Cooley, R.L. 1982. Incorporation of Prior Information on Parameters into
Nonlinear Regression Groundwater Models, 1. Theory. Water Resources
Research, Vol. 18(4), pp. 905-976.
Cooley, R.L. 1983. Incorporation of Prior Information on Parameters into
Nonlinear Regression Groundwater Models, 2. Application. Water Resources
Research, Vol. 19(3), pp. 662-676.
Cooley, R.L., and R.L. Naff. 1985. Regression Modeling of Ground-Water
Flow. Open-File Report 85-180, U.S. Geological Survey, Denver, Colorado,
Cooley, R.L., and R.L. Naff. 1990. Regression Modeling of Ground-Water
Flow. Techn. of Water-Resources Investig, of the U.S. Geol. Survey, Book
3, Ch. B4., Denver, Colorado.
IGWMC Key:	260	Model name? DELTA
Morel-Seytoux, H.J. and C.J, Daly, 1975. A Discrete Kernel Generator
for Stream-Aguifer Studies. Water Resources Research, Vol. 11(2), pp.
253-260.
Morel-Seytoux, H.J. 1975. A Simple Case of Conjunctive Surface - Ground
Water Management. Ground Water, Vol. 13(6), pp. 253-260.
Morel-Seytoux, H.J. 1975. A Combined Model of Water Table and River
Stage Evolution. Water Resources Research, Vol. 11(6), pp. 968-972.
Morel -Seytoux, H.J. 1975. Optimal Operation of Surface and Ground Water
for Pollution Dilution. CEP - 74 -75HJK39, Engineering Research Center,
Colorado State University, Fort Collins, Colorado.
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IGWMC Key:	280
Model name: NITROSIM
Davidson, J.M., D.A. Gratez, P.S.C. Rao, and H.M. Selim. 1978,
Simulation of Nitrogen Movement, Transformation, and Uptake in the Plant
Root Zone. EPA- 600/3-78 -029, U.S. Environmental Protection Agency,
EPA/CERI, Cincinnati, Ohio.
Rao, P.S.C., J.M. Davidson and R.E. Jessup. 1981. Simulation of Nitrogen
Behavior in the Root Zone of Cropped Land Areas Receiving Organic Wastes.
In: Simulation of Nitrogen Behavior of Soil - Plant Systems (Eds.: M.J.
Prissel and J.A. van Veen), pp.81-95. Center for Agricult. Public, and
Document., Wageningen, The Netherlands.
IGWMC Key:	290	Model name: NMODEL/WASTEN
Selim, H.M. and I.K. Iskander. 1980. WASTEN: A Model for Nitrogen
Behavior in Soils Irrigated with Liquid Waste. In: Simulation of Nitrogen
Behavior of Soil-Plant Systems, pp. 96-108, Centre for Agricultural
Publishing and Documentation, Wageningen, The Netherlands.
Selim, H.M., and I.K. Iskander. 1980. Simplified Model for Prediction of
Nitrogen Behavior in Land Treatment of Wastewater. CRREL Report 80-12,
U.S. Army Cold Regions Res. and Eng. Lab., Hanover, New Hampshire. The
report describes the model theory, program structure and data input
preparation. It includes a listing of the source code.
Selim, H.M. and I.K. Iskander. 1980. Simplified Model for Prediction of
Nitrogen Behavior in Land Treatment of Wastewater. CRREL Report 80-12.
U.S. Army Corps of Engineers. Cold Regions Research and Engineering
Laboratory, Hanover, New Hampshire.
Iskander, I.K. and H.M. Selim. 1981. Modeling Nitrogen Transport and
Transformations in Soils: 2. Validation, Soil Science, Vol. 131(5), pp.
303-312.
Selim, H.M. and I.K. Iskander. 1981. Modeling Nitrogen Transport and
Transformation in Soils: 1. Theoretical Considerations. Soil Science,
Vol. 131(4), pp. 233-241.
IGWMC Key:	291	Model name: PMODEL
Mansell, R.S., H.M. Selim, and J.G.A. Fiskell. 1976. Simulation
Transformations and Transport of Phosphorus in Soil. Soil Science, Vol.
124 (2), pp. 102-109.
Mansell, R.S., H.M. Selim, P. Kanchanasut, J.M. Davidson and J.G.A.
Fiskell. 1977. Experimental and Simulated Transport of Phosphorus
through Sandy Soils. Water Resources Research, Vol, 13(1), pp. 189-194.
Fiskell, J.G.A., R.S. Mansell, H.M. Selim and F.G. Martin, 1979. Kinetic
Behavior of Phosphorus Sorption by Acid, Sandy Soil. Journ. of Environm.
Quality, Vol. 8(4), pp. 579-584.
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IGWMC Key:	322
Model name: PLASM
Prickett, T.A. and C.G. Lonnquist. 1971. Selected Digital Computer
Techniques for Groundwater Resource Evaluation. Bulletin 55, Illinois
State Water Survey, Urbana, 111.
Prickett, T.A., and C.G. Lonnquist. 1973. Aquifer Simulation Model for
Use on Disk Supported Small Computer Systems. Circular 114, Illinois
State Water Survey, Urbana, Illinois.
Prickett, T.A. and C.G. Lonnquist. 1976. Methods de Ordenador para
Evaluacion de Recursos Hidraulicos Subterraneos. Boletin 41. (Spanish
version of Bulletin 55, ISWS). Ministerio de Obras Publicas, Direccion
General de Obras Hidraulicos, Madrid, Spain.
Institute Geologico Y Minero de Espana. 1981. Modelos Multicapa -- Tomo
I: Manuales de Utilizaeion. Ministerio de Industria Y Energia, Madrid,
Spain.
Instituto Geologico Y Minero de Espana. 1981. Modelos Multicapa -- Tomo
II: Listados de Programas, Mini streio de Industria Y Energia, Madrid,
Spain.
Institute Geologico Y Minero de Espana, 1982. Modelos Monocapa en
Regimen Transitorxo - ~ Tomo I. Manuales de Utj.lxzaci.on. Dxrrecxon de
Aguas Subterraneas y Geotecnia, Ministerio de Industria y Energia, Madrid,
Spain.
Instituto Geologico Y Minero de Espana. 1982. Modelos Monocapa en
Regimen Transxtorxo ~ ~ Tomo 11 * Lxs tados de Ordenador, Ministerxo de
Industria Y Energia, Madrid, Spain.
IGWMC Key:	513	Model name: GAFETTA
Voss, C.I. 1979. A Mathematical Model for Aquifer Energy Storage. Rept.
79-10,	Dept. of Water Resources Eng., Royal Institute of Technology,
Stockholm, Sweden.
Pinder, G. F., I. P. E. Kinnmark, and C. I. Voss. 1980. GAFETTA, a
Galerkin Assymetric Finite Element Thermal Transport Aquifer Model. Rept.
80-08,	Dept. of Water Resources Eng., Royal Institute of Technology,
Stockholm, Sweden.
IGWMC Key:	514	Model name: AQUIFEM
Pinder, G.F. and C.I. Voss. 1979. AQUIFEM, a Finite Element Model for
Aquifer Simulation. Rept. 7911; Dept. of Water Resources Eng., Royal
Institute of Technology, Stockholm, Sweden.
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IGWMC Key:	515
Model name: PTC (Princeton Transport Code)
Babu, D.K., and G.F. Pinder. 1984. A Finite Element - Finite Difference
Alternating Direction Algorithm for Three Dimensional Groundwater
Transport. Adv. in Water Resources, Vol. 7, pp. 116-119.
Babu, D.K., and G.F. Pinder. 1984. Chemical Transport by
Three-Dimensional Ground Water Flows. 84-WR-3, Water Resources Program,
Dept. of Civil Eng.,' Princeton University, Princeton, New Jersey. (2nd ed.
1989)
Babu, D.K., G.F. Pinder, A. Niemi, and D.P. Ahlfield. 1986. Chemical
Transport by Three Dimensional Groundwater Flows. Dept. of Civil Eng.,
Princeton University, Princeton, New Jersey.
IGWMC Key:	581	Model name: FTRANS (fracture Flow, Thermal and
RAdioNuclide Solute transport)
Huyakorn, P.S. et Al. 1983. Finite Element Technique for Modeling
Groundwater Flow in Fractured Aquifers. Water Resources Research, Vol
19(4), pp. 1019-1035.
Huyakorn, P.S., B.H. Lester, and J.W. Mercer. 1983. An Efficient Finite
Element Technique for Modeling Transport in Fractured Porous Media, 1.
Single-Species Transport. Water Resources Research, Vol, 19(3), pp.
841-854.
Huyakorn, P.S., B.H. Lester, and J.W. Mercer. 1983. An Efficient Finite
Element Technique for Modeling Transport in Fractured Porous Media, 2.
Nuclide Decay Chain Transport. Water Resources Research, Vol. 19(5),pp.
1286-1296.
Intera Environmental Consultants, Inc. 1983. FTRANS: A Two-Dimensional
Code for Simulating Fluid Flow and Transport of Radioactive Nuclides in
Fractured Rock for Repository Performance Assessment. ONWI-426, Office of
Nuclear Waste Isolation, Battelle Project Management Division, Columbus,
Ohio.
IGWMC Key:	583	Model name: SATURN
Huyakorn, P.S., S.D. Thomas, J.W. Mercer, and B.H. Lester. 1983. SATURN;
A Finite-Element Model for Simulating Saturated-Unsaturated Flow and
Radioactive Nuclide Transport. Techn. Rept. Submitted By GeoTrans, Inc.
to Electric Power Research Inst., Palo Alto, Calif.
Huyakorn, P.S., S.D. Thomas and B.M. Thompson. 1984. Techniques for
Making Finite Elements Competitive in Modeling Flow in Variably Saturated
Porous Media. Water Resources Research, Vol. 20(8), pp. 1099-1115.
Huyakorn, P.S., V.M. Guvanasen, and T.D. Wadsworth. 1985. MGC-SATURN:
Moisture Movement and Groundwater Components of the SATURN Code. Techn.
Report by GeoTrans, Inc. for Electric Power Research Inst., Palo Alto,
Calif.
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Huyakorn, P.S., J.w. Mercer and D.S. Ward. 1985. Finite Element Matrix
and Mass Balance Computational Schemes for Transport in Variably Saturated
Porous Media. Water Resources Research, Vol. 21(3), pp. 346-358.
IGWMC Key:	584	Model name: STAFAN/STAFANT
Huyakorn, P.S. and B.H. Lester. 1983. STAFAN: A Two-Dimensional Code for
Fluid Flow and the Interaction of Fluid Pressure and Stress in Fractured
Rock for Repository Performance Assessment. ONWI-427, Office of Nuclear
Waste Isolation, Battelle Project Management Division, Columbus, Ohio,
IGWMC Key:	588	Model name: SEFTRAN
Huyakorn, P.S., A.G. Kretschek, R.W. Broome, J.W. Mercer, and B.H. Lester.
1984. Testing and Validation of Models for Simulating Solute Transport
in Ground-water. GWMI 84-13, Internat. Ground Water Modeling Center,
Holcomb Research Inst., Butler Univ., Indianapolis, Indiana.
Huyakorn, P.S., D.S. Ward, J.O. Rumbaugh, R.W. Broome, B.H. Lester, A.K.
Siler, and J.W. Mercer. 1986. SEFTRAN: A Simple and Efficient Flow and
Transport Code, Version 2.0. GeoTrans l'echn. Rept., GeoTrans, Inc.,
Herndon, Virginia.
IGWMC Key:	589	Model name: TRAFRAP
Huyakorn, P.S., B.H, Lester, and J.W. Mercer. 1983. An Efficient Finite
Element Technique for Modeling Transport in Fractured Porous Media, 1.
Single-Species Transport. Water Resources Research, Vol. 19(3), pp.841-854.
Huyakorn, P.S., B.H. Lester, and J.W. Mercer. 1983. An Efficient Finite
Element Technique for Modeling Transport in Fractured Porous Media, 2.
Nuclide Decay Chain Transport. Water Resources Research, Vol. 19(5),pp.
1286-1296.
Huyakorn, P.S. et A1. 1983. Finite Element Technique for Modeling
Groundwater Flow in Fractured Aquifers. Water Resources Research, Vol
19 (4), pp. 1019-1035.
Huyakorn, P.S., H.O. White, Jr., V.M. Guvanasen, and B.H. Lester. 1986.
TRAFRAP: A Two-Dimensional Finite Element Code for Simulating Fluid Flow
and Transport of Radionuclides in Fractured Porous Media. International
Ground Water Modeling Center, Holcomb Research Institute, Butler
University, Indianapolis, Indiana.
Huyakorn, P.S., H.O. White, Jr., and T.D. Wadsworth. 1987. TRAFRAP-WT: A
Two-Dimensional Finite Element Code for Simulating Fluid Flow and
Transport of Radionuclides in Fractured Porous Media with Water Table
Boundary Conditions. HydroGeologic, Inc., Herndon, Virginia.
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IGWMC Key:	612
Model name; HOTWTR
Bedinger, M.S., F.S. Pearson Jr., R.T. Reed, R.T. Sniegochi, and C.G.
Stone. 1979. The Waters of Hot Springs National Park, Arkansas; Their
Nature and Origin. Prof. Paper 1044C, U.S. Geolog. Survey, Reston, Virg.
Reed, J.E. 1985. Digital Model for Simulating Steady-State Ground-Water
and Heat Flow. Water Resources Investig. Report 85-4248, U.S. Geological
Survey, Denver, Colorado.
IGWMC Key:	680	Model name: GWSIM-II
Texas Dept. of Water Resources. 1978. GWSIM-II: Ground-water Simulation
Program; Program Documentation and User's Manual. Rept. UM-16, Data
Collection and Evaluation Section, Austin, Texas.
IGWMC Key:	694	Model name: STFLO
Intera Environmental Consulting, Inc. 1983. STFLO: A Finite-Element Code
for Steady-State Flow in Porous Media. ONWI-428, Office of Nuclear Waste
Isolation, Battelle Project Management Division, Columbus, Ohio.
IGWMC Key:	695	Model name: NETFLO (Network Flow)
Intera Environment Consulting, Inc. 1983. NETFLO: A Network Ground Water
Flow Code. ONWI-425, Office of Nuclear Waste Isolation, Battelle Project
Management Division, Columbus, Ohio,
IGWMC Key:	696	Model name: BORHOL
INTERA Technologies, Inc. 1984. BORHOL: A Computer Code to Evaluate
Dissolution, Precipitation, Creep, and Temperature Effects in Boreholes in
Salt. ONWI-547, Office of Nuclear Waste Isolation, Battelle Project
Management Division, Columbus, Ohio.
IGWMC Key:	697	Model name: SWENT (Simulator for Water, Energy
and Nuclide Transport)
INTERA Environmental Consultants, Inc. 1983. SWENT: A Three-Dimensional
Finite-Difference Code for the Simulation of Fluid, Energy, and Solute
Radionuclide Transport. ONWI-457, Office of Nuclear Waste Isolation,
Battelle Project Management Division, Columbus, Ohio.
Wilson, J.L., B.S. RamaRao and J.A.McNeish. 1986. GRASP: A Computer Code
to Perform Post-SWENT Adjoint Sensitivity Analysis of Steady-State
Ground-Water Flow. ONWI-625, Office of Nuclear Waste Isolation, Battelle
Project Management Division, Columbus, Ohio.
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IGWMC Key:	730
Model name: GSOTHER, GEOTHER/VT4
Faust, C.R., and J.W. Mercer. 1977. Finite-Difference Model of
Two-Dimensional Single- and Two-phase Heat Transport in a Porous Medium:
Version 1.0. Open-File Report 77-234, U.S. Geological Survey, Reston,
Virginia.
Faust, C.R., and J.W, Mercer. 1979. Geothermal Reservoir Simulation. 1.
Mathematical Models for Liquid-and-Vapor Dominated Hydrothermal Systems.
Water Resources Research, Vol. 15 {1), pp. 23-30.
Faust, C.R, and J.W, Mercer. 1979. Geothermal Reservoir Simulation. 2.
Numerical Solution Techniques for Liquid-and-Vapor Dominated Hydrothermal
Systems. Water Resources Research, Vol. 15(1), pp, 31-46.
Mercer, J.W. and C.R. Faust. 1979. Geothermal Reservoir Simulation. 3.
Application of Liquid-and-Vapor Dominated Hydrothermal Modeling Techniques
to Wairakei, New Zealand. Water Resources Research, Vol. 15(3), pp.
653-671.
Faust, C.R. and J.W. Mercer. 1981. GEOTHER, a Finite-Difference Model of
Three-Dimensional, Single-Phase and Two-Phase Heat Transport in a Porous
Medium. Report 200-00K-01, GeoTrans, Inc., Herndon, Virg. (version 2.0).
Intera Environmental Consultants, Inc. 1983. GEOTHER, a Two-Phase Fluid
Flow and Heat Transport Code. ONWI-434, Office of Nuclear Waste
Isolation, Battelle Project Management Division, Columbus, Ohio.
Bian, S.H., M.J, Budden, C.L. Bartley, and S.C, Yung. 1988. GE0THER/VT4:
A Two-Phase Groundwater Fluid Flow and Heat Transport Code for High-Level
Radioactive Waste Applications. PNL--6517, Battelle Pacific Northwest
Lab., Richland, Washington.
IGWMC Key:	740	Model name: USGS- 2D -TRANSPORT/MOC/KONBRED
Bredehoeft, J.D., and G.F. Pinder. 1973. Masss Transport in Flowing
Groundwater. Water Resources Research, Vol. 9(1), pp. 194-210.
Konikow, L.F., and J.D. Bredehoeft. 1974. Modeling Flow and Chemical
Quality Changes in an Irrigated Stream-Aquifer System. Water Resources
Research, Vol, 10(3), pp. 546-562.
Konikow, L.F., and J.D. Bredehoeft. 1978. Computer Model of
Two-Dimensional Transport and Dispersion in Ground Water, USGS Techniques
of Water Resources Investigations, Book 7, Chapter C2, U.S. Geological
Survey, Reston, Virg.
Tracy, J.V. 1982. User's Guide and Documentation for Adsorption and
Decay Modifications to the U.S.G.S, Solute Transport Model. U.S. Nuclear
Regulatory Commission Report NUREG/CR-2502.
Goode, D.J., and L.F. Konikow. 1989. Modification of a
Method-of-Characteristics Solute Transport Model to Incorporate Decay and
Equilibrium-Controlled Sorption or Ion Exchange. USGS Water Resources
Investigations Report 89-4030, U.S. Geological Survey, Reston, Virg.
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IGWMC Key:	741
Model name: USGS FRONT-TRACKING
Konikow, L.F., and J.D. Bredehoeft. 1978. Computer Model of
Two-Dimensional Transport and Dispersion in Ground Water. USGS Techniques
of Water Resources Investigations, Book 7, Chapter C2, U.S. Geological
Survey, Reston, Virg,
Garabedian, S.P., and L.F. Konikow. 1983. Front-Tracking Model for
Convective Transport in Flowing Ground Water. Water Resourc. Investig.
Rept. 83-4034, U.S. Geolog. Survey, Reston, Virg.
IGWMC Key:	742	Model name: MOCDENSE
Konikow, L.F., and J.D. Bredehoeft. 1978. Computer Model of
Two-Dimensional Transport and Dispersion in Ground Water, USGS Techniques
of Water Resources Investigations, Book 7, Chapter C2, U.S. Geological
Survey, Reston, Virg.
Sanford, W.E. and L.F. Konikow. 1985. A Two-Constituent Solute-Transport
Model for Ground Water Having Variable Density. Water-Resources
Investigations Report 85-4279, U.S. Geological Survey, Reston, Virginia.
IGWMC Key:	770	Model name: USGS-3D-FLOW
Trescott, P.C. 1975. Documentation of finite Difference Model for
Simulation of Three-Dimensional Groundwater Flow. Open-File Report
75-438, U.S. Geological Survey, Reston, Virg.
Trescott, P.C. and S.P. Larson. 1976. Supplement to Open-File Report
75-438. Open-File Report 76-591, U.S. Geological Survey, Reston, Virg.
Trescott, P.C. and S.P. Larson. 1977, Solution of Three-Dimensional
Groundwater Flow Equations Using the Strongly Implicit Procedure. J.
Hydrol., Vol. 35, pp. 49-60.
Posson, D.R., G.A. Hearne, J.V. Tracy and P.F. Frenzel. 1980. Computer
Program for Simulation Geohydrologic System in Three-Dimensions.
Open-file rept. 80-421 (modified version), U.S. Geological Survey, Reston,
Virg..
Morrissey, D.J., G.C. Lines and S.D. Bartholoma. 1980. A
Three-Dimensional Digital-Computer Model of the Ferron Sandstone Aquifer
near Emery, Utah, Water Resources Investigations Report 80-62, U.S.
Geological Survey, Salt Lake City, Utah.
Guswa, J.H. and D.R. Le Blanc. 1981. Digital Models of Groundwater Flow
in the Cape Cod Aquifer System, Massachusetts. Open-File Report 80-67,
U.S. Geological Survey, Boston, Mass.
Leahy, P.P. 1982. A Three-Dimensional Groundwater Flow Model Modified to
Reduce Computer-Memory Requirements and Better Simulate Confining-Bed and
Aquifer Pinch-outs. Water Resources Investigations Report 82-4023, U.S.
Geological Survey, Trenton, New Jersey.
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Helgesen, J.O., S.P. Larson and A.C. Razen. 1982. Model Modifications
for Simulation of Flow Through Stratified Rocks in Eastern Ohio. Water
Resources Investigations Report 82-4019, U.S. Geological Survey, Columbus,
Ohio.
Weiss, E 1982. A Computer Program for Calculating Relative Transissivity
Input Arrays to Aid Model Calibration. Open-File Report 82-447, U.S.
Geological Survey, Denver, Colorado.
Weiss, E. 1932* A Mode1 for the Sxmula txon of Flow of Variable Densxty
Groundwater in Three-Dimensions under Steady-State Conditions. Open-File
Report 82-352, U.S. Geological Survey, Denver, Colorado. (This document
describes a program that generates input to the USGS-3D-FLOW model to
enable it to simulate variable-density ground-water flow and a program
that calculates ground-water density from aquifer depth, temperature and
dissolved solids concentration.)
Hearne, G.A. 1982. Supplement to the New Mexico Three-Dimensional Model.
Open-File Report 82-857, U.S. Geological Survey, Albuquerque, New Mexico,
Torak, L.J. 1982. Modifications and Corrections to the Finite-Difference
Model for Simulation of Three-Dimensional Groundwater Flow. Open-File
Report 82-4 025, U.S. Geological Survey, Reston, Virginia.
Bennet, G.D., A.L. Kontis, and S.P. Larson. 1982. Representation or
Multi-Aquifer Well Effects in Three-Dimensional Groundwater Flow
Simulation. Ground Water, Vol. 20(31, pp. 334-341.
Gerhart, J.M., and G.J. Lazorchick. 1984. Evaluation of the Ground-water
Resources of Parts of Lancaster and Berks Counties, Pennsylvania.
Water-Resources Investig. Rept. 84-4327, U.S. Geological Survey,
Harrisburg, Pennsylvania.
Hotchkiss, W.R., and J.F. Levings. 1986. Hydrogeology and Simulation of
Water Flow in Strata above the Bearpaw Shale and Equivalents of Eastern
Montana and Northeastern Wyoming. Water-Resources Investigations Report
85-4281, U.S. Geological Survey, Helena, Montana.
Kontis, A.L., and R.J. Mandle. 1988. Modifications of a
Three-Dimensional Ground-Water Flow Model to Account for Variable Water
Density and Effects of Multiaquifer Wells. Water-Resources Investigations
Report 87-4265, U.S. Geological Survey, Madison, Wisconsin.
IGWMC Key:	771	Model name: USGS- 2D - FLOW
Pinder, G.F. 1970. An Iterative Digital Model for Aquifer Evaluation.
Open-File Report, U.S. Geological Survey, Reston, Virginia.
Trescott, P.C. 1973. Iterative Digital Model for Aquifer Evaluation.
Open-File Report, U.S. Geological Survey, Reston, Virginia.
Crist, M.A. 1983. Computer Program and Data Listing for Two-Dimensional
Groundwater Model for Laramie County, Wyoming. Water Resources
Investigations Report 83-4137, U.S. Geological Survey, Cheyenne, Wyoming.
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Trescott, P. C., G. F, Pinder, and S. P. Larson. 1976. Finite-Difference
Model for Aquifer Simulation in Two Dimensions with Results of Numerical
Experiments. Technology of Water Resources Investigation of the U.S.
Geological Survey, Book 7; Chapter 1, Reston, Virg.
Trescott, P.C. and S.P. Larson. 1977. Comparison of Iterative Methods of
Solving Two-Dimensional Groundwater Flow Equations. Water Resources
Research Vol. 13(1), pp. 125-136.
Larson, S.P. and P.C. Trescott. 1977. Solution of Water-Table and
Anisotropic Flow Problems by Using the Strongly Implicit Procedure. J.
Research USGS, Vol. 5 {6), pp. 815-821.
Larson, S.P. 1978. Direct Solution Algorithm for the Two-Dimensional
Ground Water Flow Model. Open-File Report 79-202. U.S. Geological
Survey, Reston, vir.
Razeir., A.C. and S.D. Bartholma. 1980. Digital Computer Model of
Groundwater Flow in Tooele Valley, Utah. Open-File Report 80-446, U.S.
Geological Survey, Salt Lake City, Utah.
Hutchinson, C.B., D.M. Johnson and J.M. Gerhart. 1981. Hydrogeology of
Well-Field Areas near Tampa, Florida. Phase I - Development and
Documentation of a Two-Dimensional Finite-Difference Model for Simulation
of Steady-State Groundwater Flow. Open-File Report 81-630, U.S.
Geological Survey, Tallahassee, Florida.
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IGWMC Key:	772	Model name: SSIM3D
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IGWMC Key:	781	Model name: MMT-1D
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Version). BNWL-2127, Battelle Pacific Lab., Richland, Wash.
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Ahlstroro, S.W., H.P. Foote, R.C. Arnett, C.R. Cole, and R.J. Seme. 1977.
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IGWMC Key:	951	Model name: IDPNGM
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Guvanasen, V. 1979. Brief Program Descriptions for Identification of
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IGWMC Key: 1092	Model name: FLO
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IGWMC Key: 1230	Model name: AQU-1
Rushton, K.R. and S.C. Reshaw. 1979. Seepage and Ground-water Flow.
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IGWMC Key: 1771	Model name: MUST (Model for Unsaturated flow
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Delft, The Netherlands.
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IGWMC Key: 1791
Model name: SLAEM, SLAEKS, MLASM, SLW, SLWL
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Simulation of the Dewatering Activities in the Divide-Cut Section of the
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Strack, O.D.L. and H.M. Haitjema. 1981. Modeling Double Aquifer Flow
Using a Comprehensive Potential and Distributed Singularities II. Solution
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IGWMC Key: 1820	Model name: FLOP, FLOP-LIESTE, FLOP-Z1,
FLOP-ZN
Van Den Akker, C. 19 82. Numerical Analysis of the Stream Function in
Plane Groundwater Flow. PhD. Thesis, Technical University of Delft,
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Gebruik Van Het Computerprogramma FLOP. (User's Manual; in Dutch). Werkgroep
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IGWMC Key: 1852	Model name: SWIFT (Salt Water Interface by
Finite element Technique)
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Computer Programs,a SWIFT: Salt Water Interface by the Finite-Element
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Netherlands, (in Dutch)
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Verruij t, A. 1982 . A Numerical Model for Multiphase Flow in Porous
Media. In: Proceed. Euromech 143. A.A. Balkema Publishers, Rotterdam,
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Verruijt, A. and J.B.S. Gan. 1983. Non-Steady Flow of Fresh and Saline
Groundwater by the Element Method. H20 Journal (The Netherlands), Vol.
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IGWMC Key: 1950	Model name: DRAINMOD
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Humid Regions. J. Irrigation and Drainage Div. ASCE, Vol. 106(IR4), pp.
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Evaluation for North