Publication Citation

USGS Series Open-File Report
Report Number 2000-92
Title MODFLOW-2000, The U.S. Geological Survey Modular Ground-Water Model - User Guide to Modularization Concepts and the Ground-Water Flow Process
Edition -
Language ENGLISH
Author(s) Harbaugh, Arlen W.; Banta, Edward R.; Hill, Mary C.; McDonald, Michael G.
Year 2000
Originating office Geological Survey (U.S.)
USGS Library Call Number (200) R29o no.2000-92
Physical description viii, 121 p.
ISBN

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Abstract

MODFLOW is a computer program that numerically solves the three-dimensional ground-water flow equation for a porous medium by using a finite-difference method. Although MODFLOW was designed to be easily enhanced, the design was oriented toward additions to the ground-water flow equation. Frequently there is a need to solve additional equations; for example, transport equations and equations for estimating parameter values that produce the closest match between model-calculated heads and flows and measured values. This report documents a new version of MODFLOW, called MODFLOW-2000, which is designed to accommodate the solution of equations in addition to the ground-water flow equation. This report is a user?s manual. It contains an overview of the old and added design concepts, documents one new package, and contains input instructions for using the model to solve the ground-water flow equation.