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.
MODFLOWP is a modification of the U.S. Geological Survey's modular finite-difference ground-water flow model (MODFLOW) that allows automated parameter estimation using nonlinear regression. From the introduction of MODFLOWP to the present, MODFLOW and MODFLOWP have been distinct computer codes, which differ substantially in ease of use and in ease of modification. Although numerous capabilities have been added to MODFLOW, the addition of support for estimating parameters related to the new capabilities has not kept pace, primarily because of the difficulties associated with adding new parameter-estimation capabilities to MODFLOWP in its present version. The degree of difficulty is due partly to the nonmodular structure of MODFLOWP. The project is a combined effort by the USGS Office of Ground Water, the National Research Program, and the Colorado Water Science Center.
MODFLOW and Related Programs
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.
MODFLOWP is a modification of the U.S. Geological Survey's modular finite-difference ground-water flow model (MODFLOW) that allows automated parameter estimation using nonlinear regression. From the introduction of MODFLOWP to the present, MODFLOW and MODFLOWP have been distinct computer codes, which differ substantially in ease of use and in ease of modification. Although numerous capabilities have been added to MODFLOW, the addition of support for estimating parameters related to the new capabilities has not kept pace, primarily because of the difficulties associated with adding new parameter-estimation capabilities to MODFLOWP in its present version. The degree of difficulty is due partly to the nonmodular structure of MODFLOWP. The project is a combined effort by the USGS Office of Ground Water, the National Research Program, and the Colorado Water Science Center.