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USGS Groundwater Software

VSF Version 1.01

Three-dimensional finite-difference groundwater model (MODFLOW)--2000 version--with variably saturated flow


Summary of VSF

Software (Version 1.01, July 5, 2006)

A readme.txt file containing installation instructions is included with the Microsoft Windows software distribution file.

MODFLOW-VSF compiled for Microsoft Windows with source code for any computer and test problems (3.7 Mb)


Support is provided for correcting bugs and clarification of how the code is intended to work. Only limited assistance can be provided for applying MODFLOW-VSF to specific problems. For support, contact:


The following report documenting MODFLOW-VSF is available on-line. See the web page for MODFLOW-2000 to see a complete listing of USGS reports documenting the MODFLOW-2000 model. Due to the date of their publishing, some of the reports may not be available in electronic form.

Thoms, R.B., Johnson, R.L. and Healy, R.W., 2006, User's guide to the Variably Saturated Flow (VSF) Process for MODFLOW: U.S. Geological Survey Techniques and Methods 6-A18, 58 p.

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Last Iteration: December 27, 2011