Model:MODFLOW

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MODFLOW




Metadata

Also known as
Model type Modular
Model part of larger framework
Incorporated models or components:
Spatial dimensions 3D
Spatial extent Watershed-Scale
Model domain Terrestrial, Hydrology
One-line model description MODFLOW is a three-dimensional finite-difference ground-water model
Extended model description MODFLOW is a three-dimensional finite-difference ground-water model that was first published in 1984. It has a modular structure that allows it to be easily modified to adapt the code for a particular application. Many new capabilities have been added to the original model. OFR 00-92 (complete reference below) documents a general update to MODFLOW, which is called MODFLOW-2000 in order to distinguish it from earlier versions.

MODFLOW-2000 simulates steady and nonsteady flow in an irregularly shaped flow system in which aquifer layers can be confined, unconfined, or a combination of confined and unconfined. Flow from external stresses, such as flow to wells, areal recharge, evapotranspiration, flow to drains, and flow through river beds, can be simulated. Hydraulic conductivities or transmissivities for any layer may differ spatially and be anisotropic (restricted to having the principal directions aligned with the grid axes), and the storage coefficient may be heterogeneous. Specified head and specified flux boundaries can be simulated as can a head dependent flux across the model's outer boundary that allows water to be supplied to a boundary block in the modeled area at a rate proportional to the current head difference between a "source" of water outside the modeled area and the boundary block. MODFLOW is currently the most used numerical model in the U.S. Geological Survey for ground-water flow problems.

In addition to simulating ground-water flow, the scope of MODFLOW-2000 has been expanded to incorporate related capabilities such as solute transport and parameter estimation.

Keywords:

basins,


First name Paul
Last name Barlow
Type of contact Model developer
Institute / Organization U.S. Geological Survey
Postal address 1 431 National Center
Postal address 2
Town / City Reston
Postal code 20192
State Virginia
Country United States
Email address pbarlow@usgs.gov
Phone
Fax


First name Arlen
Last name Harbaugh
Type of contact Model developer
Institute / Organization U.S. Geological Survey
Postal address 1 431 National Center
Postal address 2
Town / City Reston
Postal code 20192
State Virginia
Country United States
Email address harbaugh@usgs.gov
Phone
Fax


First name Edward
Last name Banta
Type of contact Model developer
Institute / Organization U.S. Geological Survey
Postal address 1 431 National Center
Postal address 2
Town / City Reston
Postal code 20192
State Virginia
Country United States
Email address erbanta@usgs.gov
Phone
Fax


First name Mary
Last name Hill
Type of contact Model developer
Institute / Organization U.S. Geological Survey
Postal address 1 431 National Center
Postal address 2
Town / City Reston
Postal code 20192
State Virginia
Country United States
Email address mchill@usgs.gov
Phone
Fax


First name Richard
Last name Winston
Type of contact Model developer
Institute / Organization U.S. Geological Survey
Postal address 1 431 National Center
Postal address 2
Town / City Reston
Postal code 20192
State Virginia
Country United States
Email address rbwinst@usgs.gov
Phone
Fax


Supported platforms Unix, Linux, Mac OS, Windows
Other platform
Programming language Fortran77, Fortran90, C
Other program language
Code optimized Single Processor, Multiple Processors
Multiple processors implemented
Nr of distributed processors
Nr of shared processors
Start year development 1984
Does model development still take place? Yes
If above answer is no, provide end year model development
Code development status Active
When did you indicate the 'code development status'? 2020
Model availability As code
Source code availability
(Or provide future intension)
Through web repository
Source web address http://water.usgs.gov/nrp/gwsoftware/modflow2000/modflow2000.html
Source csdms web address
Program license type Other
Program license type other Non-commercial MODFLOW versions are free, however, their licensing usually limit the use to non-profit educational or research purposes.
Memory requirements --
Typical run time --


Describe input parameters Too many to mention here, see:

http://water.usgs.gov/nrp/gwsoftware/modflow2000/modflow2000.html

Input format
Other input format
Describe output parameters Too many to mention here, see:

http://water.usgs.gov/nrp/gwsoftware/modflow2000/modflow2000.html

Output format ASCII, Binary
Other output format
Pre-processing software needed? No
Describe pre-processing software
Post-processing software needed? No
Describe post-processing software
Visualization software needed? No
If above answer is yes
Other visualization software


Describe processes represented by the model The ground-water flow equation is solved using the finite-difference approximation. The flow region is subdivided into blocks in which the medium properties are assumed to be uniform. In plan view the blocks are made from a grid of mutually perpendicular lines that may be variably spaced. Model layers can have varying thickness. A flow equation is written for each block, called a cell. Several solvers are provided for solving the resulting matrix problem; the user can choose the best solver for the particular problem. Flow-rate and cumulative-volume balances from each type of inflow and outflow are computed for each time step.
Describe key physical parameters and equations --
Describe length scale and resolution constraints --
Describe time scale and resolution constraints --
Describe any numerical limitations and issues --


Describe available calibration data sets
Upload calibration data sets if available:
Describe available test data sets Test data sets are provided to verify that MODFLOW-2000 is correctly installed and running on the system. The tests may also be looked at as examples of how to use the program.
Upload test data sets if available:
Describe ideal data for testing


Do you have current or future plans for collaborating with other researchers?
Is there a manual available? Yes
Upload manual if available:
Model website if any http://water.usgs.gov/nrp/gwsoftware/modflow2000/MFDOC/index.html
Model forum / discussion board Please send comments and corrections to Richard B. Winston (rbwinst@usgs.gov).
Comments Disclaimer

Although every effort is made to provide timely and accurate information, the authors, the U.S. Geological Survey (USGS), and the U.S. Government make no warranty, expressed or implied, as to the timeliness or accuracy of the contents of this web site, which may be updated and revised at any time. Any use of trade, product, or firm names in this publication is for descriptive purposes only and does not imply endorsement by the U.S. Government. Any links to non-Government web sites are provided for convenience only and do not imply endorsement by the U.S. Government.


This part will be filled out by CSDMS staff

OpenMI compliant No but possible
BMI compliant No but possible
WMT component No but possible
PyMT component
Can be coupled with:
Model info
Paul Barlow
Harbaugh, Banta, Hill, Winston
Citation indices MODFLOW
Nr. of pubs: 934
Citations: 26912
h-index: 65
Qrcode MODFLOW.png
Link to this page




Introduction

History

References




Citation indices MODFLOW
Nr. of pubs: 934
Citations: 26912
h-index: 65



Featured publication(s)YearModel describedType of ReferenceCitations
Markstrom, Steven L.; Niswonger, Richard G.; Regan, R. Steven; Prudic, David E.; Barlow, Paul M.; 2005. GSFLOW-Coupled Ground-water and Surface-water FLOW model based on the integration of the Precipitation-Runoff Modeling System (PRMS) and the Modular Ground-Water Flow Model (MODFLOW-2005). .
(View/edit entry)
2005GSFLOW
MODFLOW
PRMS
Model overview 207
Harbaugh, A.W.; Banta, E.R.; Hill, M.C.; McDonald, M.G.; 2000. MODFLOW-2000, the U.S. Geological Survey modular ground-water model — User guide to modularization concepts and the Ground-Water Flow Process.. Open-File Report 00-92. U.S. Geological Survey..
(View/edit entry)
2000MODFLOW
Model overview 1743
McDonald, M.G.; Harbaugh, A.W.; 1983. A modular three-dimensional finite-difference ground-water flow model.. Open-File Report 83-875. U.S. Geological Survey., , .
(View/edit entry)
1983MODFLOW
Model overview 2173
Harbaugh, A.W.; McDonald, M.G.; 1996. User's documentation for MODFLOW-96, an update to the U.S. Geological Survey modular finite-difference ground-water flow model.. Open-File Report 96-485. U.S. Geological Survey..
(View/edit entry)
1996MODFLOW
Model overview 710
See more publications of MODFLOW


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Input Files

Output Files