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Water Resources of the United States

Water Resources Groundwater Software

This software and related material (data and documentation) are made available by the U.S. Geological Survey (USGS) to be used in the public interest and the advancement of science. You may, without any fee or cost, use, copy, modify, or distribute this software, and any derivative works thereof, and its supporting documentation, subject to the USGS software User's Rights Notice.

You may obtain other electronic or print versions of USGS reports and documentation that are not included with the software distributions.

Groundwater Flow, Transport, and Geochemical Reactions, including Groundwater/Surface-Water Interactions

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Variably-Saturated Flow and Transport

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Hydrograph-Separation and other Streamflow-Based Programs

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Analysis of Aquifer Tests and Slug Tests

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Graphical User Interfaces and Post Processors

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Legacy and Superseded software, and software that is not actively supported by the USGS

See entire listing of Retired software

Abbreviations for OSs

Computer systems for which software distribution packages have been compiled are shown in parentheses following the software name; abbreviations used are defined as follows:

New or Recently Updated Software

Software which has a recent release date will be annotated with one of three icons, in descending level of visual imperative.

newest – released in last 28 days
newer – released in last 56 days
new – released in last 112 days

A separate web page is available listing recently updated software.

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