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Water Software > Groundwater Software > MODFLOW and Related Programs > GWM

GWM: Groundwater Management Process for MODFLOW Using Optimization

Overview of GWM

GWM is a Groundwater Management Process for the U.S. Geological Survey modular three-dimensional groundwater model, MODFLOW. GWM uses a response-matrix approach to solve several types of linear, nonlinear, and mixed-binary linear groundwater management formulations. Each management formulation consists of a set of decision variables, an objective function, and a set of constraints. There are two different versions of GWM that are actively supported and available for use:

  • GWM-2005: This is currently the standard version of GWM and is based on MODFLOW-2005. GWM-2005 was first released in 2009.
  • GWM-VI (Version Independent): This version of GWM can be used with any version of MODFLOW that meets certain requirements on input and output. This version also allows parallel processing of the MODFLOW runs required to solve an optimization problem. This version was first released in 2013.

A third version of the software, GWM-2000, has been superseded but is provided below for historical reference and for those still using MODFLOW-2000.

GWM-2005 Information and Downloads

[Image: Cover of software documentation report. ]

Software Downloads

Note: Users are encouraged to read the documents that are provided in the 'doc' directory of this software distribution.

Documentation of GWM-2005


GWM-VI Information and Downloads

[Image: Cover of software documentation report. ]

Software Downloads

Note: Users are encouraged to read the documents that are provided in the 'doc' directory of this software distribution.

Documentation of GWM-VI

Example Applications of GWM

Superseded Version: GWM-2000

GWM-2000 is based on MODFLOW-2000. It does not support all of the functionality that has been developed for GWM-2005 and GWM-VI. Although the code is provided for users still working with MODFLOW-2000, it has been superseded by GWM-2005 and GWM-VI. The software version(s) below are provided online for historical reference only, and the pages may contain outdated information or broken links.

Points of Contact

Support is provided for correcting bugs and clarification of how GWM is intended to work. Only limited assistance can be provided for applying GWM to specific problems by contacting the points of contact listed below:

U.S. Geological Survey
Office of Groundwater
411 National Center
12201 Sunrise Valley Drive
Reston, VA 20192

Other USGS Groundwater Software

The USGS develops groundwater RSS, water-quality, surface-water, and other water-resources software for use by the USGS in fulfilling its mission. Most of this software is available online for download at no charge.

Disclaimers and Notices

Please refer to the USGS Software User Rights Notice for complete use, copyright, and distribution information. The USGS provides no warranty, expressed or implied, as to the correctness of the furnished software or the suitability for any purpose. The software has been tested, but as with any complex software, there could be undetected errors. Users who find errors are requested to report them to the USGS.

References to non-USGS products, trade names, and (or) services are provided for information purposes only and do not constitute endorsement or warranty, express or implied, by the USGS, U.S. Department of Interior, or U.S. Government, as to their suitability, content, usefulness, functioning, completeness, or accuracy.


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URL: http://water.usgs.gov/ogw/gwm/index.html
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Page Last Modified: Thursday, 04-Dec-2014 13:38:34 EST