# EPANET 2.2
#	Introduction
EPANET is used to perform extended-period simulation of the hydraulic and
water quality behavior within drinking water distribution systems (e.g.,
pressurized pipe networks), which consist of pipes, nodes (junctions),
pumps, valves, storage tanks, and reservoirs. It can be used to track the
flow of water in each pipe, the pressure at each node, the height of the
water in each tank, a chemical concentration, the age of the water, and
source tracing throughout the network during a simulation period.
EPANET was developed as a tool for understanding the movement and fate of
drinking water constituents within distribution systems, and can be used
for many different kinds of applications in distribution systems
analysis. Today, engineers and consultants use EPANET to design and size
new water infrastructure, retrofit existing aging infrastructure,
optimize operations of tanks and pumps, reduce energy usage, investigate
water quality problems, and prepare for emergencies. EPANET can also be
used to model contamination threats and evaluate resilience to security
threats or natural disasters.
#	Description
This repository was established to provide U.S. EPA's official release of
2.2.0. The last official release of EPANET was version 2.00.12, dated
2008. The release of EPANET 2.2.0 represents a significant step forward
in two important ways. First, the EPANET 2.2.0 release represents a new,
open source software project in collaboration with the community at
OpenWaterAnalytics (Chttps://github.com/OpenWaterAnalytics/EPANET>) to
maintain and extend EPANET. The EPANET developers' community at OWA
() is composed of dedicated
volunteers from around the world who have a passion for EPANET. Second,
EPANET 2.2.0 includes major updates to the hydraulic and water quality
engines of EPANET 2.00.12.
This repository is being set up to bring together the EPANET engine
contributions from the EPA/OWA's release of EPANET 2.2.0
(Chttps://github.com/OpenWaterAnalytics/EPANET/releases/tag/v2.2>) along
with U.S. EPA's effort to update the Delphi-based user interface, user's
manual, and the integrated Help manual, which resides within the Delphi-
based EPANET graphical user interface.
This repository is for archiving the source code and document files
associated with the EPA/OWA EPANET 2.2.0 release. Anyone interested in
examining these files can peruse the appropriate folder in this
repository.
#	Intended Audience
The intended audience for this repository is anyone working on water
distribution system modeling and interested in knowing more about the
source code and documentation associated with the official release of
EPANET 2.2.0.
#	License
EPANET is released under the MIT license. See the LICENSE.txt file.

-------
#	Contributing
EPANET has an active open source software community including consulting
engineers, students, researchers, software companies, professional
organizations, other interested members of the public, and EPA partners.
An Open Source EPANET Initiative is at
. Anyone wanting to contribute to
the open source, collaborative project for EPANET should go to
. Everyone is welcome to
participate in the EPANET project. Whether you are helping others to
resolve issues, reporting a new unknown issue, suggesting a new feature
that would benefit your workflow, or writing code, we value and
appreciate your time and effort. The path for contribution starts with
entering an issue at https://github.com/OpenWaterAnalytics/EPANET/issues.
Examine the open issues at this link and the conversation around them,
and then get engaged!
Finally, the issues identified and resolved here were the result of U.S.
EPA's efforts to coordinate beta testing of the EPA/OWA EPANET version
2.2.0.
#	Documentation
The "Read the Docs" version of the EPANET User's Manual is available here
at https://epanet22.readthedocs.io/en/latest/. Alternatively, an Acrobat
PDF version is available for download within the User Manual folder
https://github.com/USEPA/EPANET2.2/tree/master/User_Manual.
#	Contact
epanet0epa.gov
#	EPA Disclaimer
The United States Environmental Protection Agency (EPA) GitHub project
code is provided on an "as is" basis and the user assumes responsibility
for its use. EPA has relinquished control of the information and no
longer has responsibility to protect the integrity, confidentiality, or
availability of the information. Any reference to specific commercial
products, processes, or services by service mark, trademark,
manufacturer, or otherwise, does not constitute or imply their
endorsement, recommendation or favoring by EPA. The EPA seal and logo
shall not be used in any manner to imply endorsement of any commercial
product or activity by EPA or the United States Government.

-------