MODFLOW is the name that has been given the USGS Modular Three-Dimensional Ground-Water Flow Model, and is the most widely used groundwater flow model worldwide.  Because of its ability to simulate a wide variety of systems, its extensive publicly available documentation, and its rigorous USGS peer review, MODFLOW is used to simulate systems for water supply, containment remediation and mine dewatering. When properly applied, MODFLOW is the recognized standard model used by courts, regulatory agencies, universities, consultants and industry.

This model is public domain and can be downloaded for FREE using the link below.

MODFLOW is DOS program. There are numerous WIndows-based Graphical User Interfaces (GUIs) for MODLFOW.  Please see our MODFLOW Based Software for several MODFLOW GUIs and other MODFLOW related software products. 

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