EPA/600/C-13/148
ARS/296053
The Automated Geospatial
Watershed Assessment Tool Version 3.0
The Automated Geospatial Watershed Assessment (AGWA) tool has been
developed under an interagency research agreement between the U.S.
Environmental Protection Agency, Office of Research and Development,
and the U.S. Department of Agriculture, Agricultural Research Service.
AGWA is an assessment tool that uses widely available data to run two
hydrologic models (KINEROS2 and SWAT). It was designed to be easily
applied by managers and scientists to evaluate likely outcomes of
management scenarios and rank different areas in a watershed in terms of
likely consequences to change. It was also designed to perform watershed
analyses over large areas such as entire basins and to evaluate problem
areas at the subwatershed scale to include small communities or rural
areas. AGWA has been tested in a wide variety of watersheds and
geographies. Since its initial release in ArcView 3.x, AGWA has been
downloaded over 8000 times by users spanning 163 countries.
AGWA requires GIS data that are easily acquired and available free of
charge throughout the United States. AGWA and its associated datafiles and
documentation are available for download from our websites (listed below).
Land cover, soils, and topographic data needed to run AGWA can be
downloaded from the Internet. AGWA is available as AGWA 1.5 for ArcView
3.x, AGWA 2.x for ArcGIS 9.x, and AGWA 3.x for ArcGIS 10.x software
platforms. Minimum system requirements for all versions of AGWA are
defined by the minimum system requirements for their respective software
platforms.
All versions of AGWA share the same feature base, including advanced
features such as: multiple outlet watershed discretization, parameterization
and simulation; KINEROS riparian buffer simulation; SWAT hydrologic
response units and water quality simulation; and nested watershed
discretization. Additionally, AGWA 2.x and 3.x utilize personal geodatabases
instead of shapefiles for derived GIS products. AGWA has been peer-
reviewed by both the EPA and ARS protocols and is supported by technical
manuals and a quality assurance/quality control report available via the
websites.
AGWA has been successfully peer-reviewed by both the EPA and ARS
protocols and is supported by technical manuals and a quality
assurance/quality control report available via the websites.
Principle contacts for this product are:
William G. Kepner
U.S. Environmental Protection Agency
P.O. Box 93478
Las Vegas, NV 89193-3478
Resullv
KINEROS
SWAT
Infiltration (mm, m /km)
Infiltration (in, ac-ft/mi)
Runoff (mm, m3)
Peak flow (ms/s, mm/hr)
Sediment yield (kg/ha)
Channel scour (mm/m2)
Sediment discharge (kg/s)
Erosion (depth/area)
Precipitation (mm)
ET(mm)
Percolation (mm)
Surface runoff (mm)
Transmission loss (mm)
Sediment Yield (t/ha)
Water Yield (mm)
Nitrate (kg N/ha)
Phosphorous (kg P/ha)
David C. Goodrich or Shea Burns
USDA-ARS Southwest Watershed Research Center
2000 East Allen Road
Tucson, AZ 85719-1596
For more information, visit our websites at
http://www.tucson.ars.ag.gov/agwa
http://www.epa.gov/nerlesdl/land-sci/agwa/index.htm
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