[Service_Parameters: Service_Topic='DATA MANAGEMENT/DATA HANDLING', Service_Term='CATALOGING']
MODFLOW - the Modular Three-Dimensional Finite-Difference Ground-Water Flow ModelEntry ID: modflow-99
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Abstract: The modular finite-difference ground-water flow model (MODFLOW) is the USGS's modular hydrologic model. MODFLOW is considered an international standard for simulating and predicting groundwater conditions and groundwater/surface-water interactions.
Originally developed and released solely as a groundwater-flow simulation code when first published in 1984, MODFLOW's modular structure has provided a robust framework for integration of additional simulation capabilities that build on and enhance its original scope. The family of MODFLOW-related programs now includes capabilities to simulate coupled groundwater/surface-water systems, solute transport, variable-density flow (including saltwater), aquifer-system compaction and land subsidence, parameter estimation, and groundwater management.
ISO Topic Category
Quality Modflow is best suited for higher education students, scientists and professionals seeking a utility to model ground water flow.
Use Constraints In order to use MODFLOW, initial conditions, hydraulic properties, and stresses must be specified for every model cell in the finite-difference grid. MODFLOW-96 is written in Fortran 77 with the following extension: use of variable names longer than 6 characters. By default, the software is dimensioned for use with models having up to 90,000 cells. MODFLOW-96 requires that file names needed for ... the simulation be defined prior to execution. A Name File is used for this purpose. Each record of the Name File specifies a file type, unit number, and file name for each file used in the MODFLOW simulation. The format of this file is described in the documentation. Generally, the program is easily installed on most computer systems. The code has been used on UNIX-based computer and DOS-based 386 or greater computers having a math coprocessor and 4 mb of memory.
Role: SERF AUTHOR
Email: Tyler.B.Stevens at nasa.gov
5700 Rivertech Court
Province or State: MD
Postal Code: 20737
Belitz, K., and Phillips, S.P., 1993, Numerical simulation of
ground-water flow in the central part of the western San Joaquin
Valley, California: U.S. Geological Survey Water-Supply Paper 2396, 69
Prince, K.R., Franke, O.L., and Reilly, T.E., 1988, Quantitative
assessment of the shallow ground-water flow system associated with
Connetquot Brook, Long Island, New York: U.S. Geological Survey
Water-Supply Paper 2309, 28 p.
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