USGS Ground-Water Software

MODFLOW-2000 Version 1.18.01

MODular three-dimensional finite-difference ground-water FLOW model--2000 updated version

The Online Guide to MODFLOW-2000 and MODFLOW-2005 can be used as a quick way of looking up options available for MODFLOW from the USGS and input formats. It is not a tutorial and is primarily intended for those already familiar with MODFLOW.

Unfortunately, due to licensing restrictions, the USGS is no longer able to publicly distribute the Algebraic Multi-Grid (AMG) solver, on which the Link-AMG (LMG) Package relies. USGS users can download a version of Modflow-2000 that includes AMG from a restricted web site (please contact Ned Bantaor Arlen Harbaughfor the URL). Users outside the USGS can request the code directly from Dr. Klaus Stuben of Fraunhofer-Institute for Algorithms and Scientific Computing (SCAI), Sankt Augustin, Germany, at amg1r5@scai.fraunhofer.de.

Software (Version 1.18.01, June 20, 2008)

A Readme.txt file containing installation instructions is included with the Microsoft Windows software distribution file.

A readme.unix file containing installation instructions is included with the Unix software distribution file.

MODFLOW-2000 compiled for Microsoft Windows 95, 98, ME, NT, 2000, or XP

Contains compiled executable program, source code, test problems, and data conversion utilities.

mf2k1_18_01.exe (5.9 Mb)

MODFLOW-2000 source code for UNIX

Contains source code, and test problems.

mf2k1_18_01.tar.gz (2.4 Mb)

Support

Support is provided for correcting bugs and clarification of how the code is intended to work. Only limited assistance can be provided for applying MODFLOW to specific problems. For support, contact:

To be notified when updates to MODFLOW-2000 are released, send email to Edward Banta.

Documentation

The following reports documenting MODFLOW are available on-line. Select the "Summary of MODFLOW-2000" link above to see a complete listing of USGS reports documenting the MODFLOW model. Due to the date of their publishing, many of the reports are not available in electronic form.

Harbaugh, A.W., Banta, E.R., Hill, M.C., and 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: U.S. Geological Survey Open-File Report 00-92, 121 p.

User's Documentation, Portable Document Format (PDF) (656K)

Hill, M.C., Banta, E.R., Harbaugh, A.W., and Anderman, E.R., 2000, MODFLOW-2000, the U.S. Geological Survey modular ground-water model -- User guide to the Observation, Sensitivity, and Parameter-Estimation Processes and three post-processing programs: U.S. Geological Survey Open-File Report 00-184, 210 p.

User's Documentation, Portable Document Format (PDF) (578K)

Hill, M.C., 1998, Methods and guidelines for effective model calibration: U.S. Geological Survey Water-Resources Investigations Report 98-4005, 90 p. [with application to UCODE, a computer code for universal inverse modeling, and MODFLOWP, a computer code for inverse modeling with MODFLOW].
(MODFLOW-2000 replaces MODFLOWP.)

Guidelines, Portable Document Format (PDF) (1.5 Mb)
This publication has been superceded by Hill and Tiedeman (2007)

Leake, S.A., and Galloway, D.L., 2007, MODFLOW ground-water model -- User guide to the Subsidence and Aquifer-System Compaction Package (SUB-WT) for Water-Table Aquifers: U.S. Geological Survey Techniques and Methods, Book 6, Chap. A23, 42 p.

SWT Package Documentation, Portable Document Format (PDF) (1.79 Mb)

Wilson, J.D. and Naff, R.L., 2004, The U.S. Geological Survey modular ground-water model -- GMG linear equation solver package documentation: U.S. Geological Survey Open-File Report 2004-1261, 47 p.

GMG Package Documentation, Portable Document Format (PDF) (4.09 Mb)

Prudic, D.E., Konikow, L.F., and Banta, E.R., 2004, A new stream- flow routing (SFR1) package to simulate stream-aquifer interaction with MODFLOW-2000: U.S. Geological Survey Open-File Report 2004-1042, 95 p.

SFR1 Package Documentation, Portable Document Format (PDF) (1.2 Mb)

Niswonger, R.G. and Prudic, D.E., 2005, Documentation of the Streamflow-Routing (SFR2) Package to include unsaturated flow beneath streams--A modification to SFR1: U.S. Geological Survey Techniques and Methods, Book 6, Chap. A13, 47 p.

SFR2 Package Documentation, Portable Document Format (PDF) (905 kb)

Höffmann, J., Leake, S.A., Galloway, D.L., and Wilson, A.M., 2003, MODFLOW-2000 Ground-Water Model--User Guide to the Subsidence and Aquifer-System Compaction (SUB) Package: U.S. Geological Survey Open-File Report 03-233, 44 p.

SUB Package Documentation, Portable Document Format (PDF) (2.1 Mb)

Halford, K.J. and Hanson, R.T., 2002, User guide for the drawdown- limited, multi-node well (MNW) package for the U.S. Geological Survey's modular three-dimensional finite-difference ground-water flow model, versions MODFLOW-96 and MODFLOW-2000: U.S. Geological Survey Open-File Report 02-293, 33 p.

MNW Package Documentation, Portable Document Format (PDF) (845K)

Zheng, Chunmiao, Hill, M.C., and Hsieh, P.A., 2001, MODFLOW-2000, the U.S. Geological Survey modular ground-water model - User guide to the LMT6 package, the linkage with MT3DMS for multi- species mass transport modeling: U.S. Geological Survey Open-File Report 01-82, 43 p.

LMT6 Package Documentation, Portable Document Format (PDF) (3.6Mb)
Download MT3DMS (not a USGS program)

Mehl, S.E. and Hill, M.C., MODFLOW-2000, the U.S. Geological Survey modular ground-water model -- User guide to the LINK-AMG (LMG) Package for solving matrix equations using an algebraic multigrid solver: U.S. Geological Survey Open-File Report 01-177, 33 p.

LMG Package Documentation, Portable Document Format (PDF) (788K)

Anderman, E.R. and Hill, M.C., 2001, MODFLOW-2000, the U.S. Geological Survey modular ground-water model -- Documentation of the Advective-Transport Observation (ADV2) Package, version 2: U.S. Geological Survey Open-File Report 01-54, 69 p.

ADV2 Package Documentation, Portable Document Format (PDF) (3 Mb)

Program modification of the ADV2 package MODFLOW-2000, the U.S. Geological Survey modular ground-water model - Documentation of effective-porosity parameters in the Advective-Transport Observation (ADV2) Package

ADV2 Package, Effective-Porosity Parameters Documentation (PDF) (62K) (Updated June 14, 2005)

A short description of the ADV2 package that is documented in Open-File Report 01-54: Anderman, E.R. and Hill, M.C., 2001, Improving ground-water flow model calibration with the advective-transport observation (ADV2) package to MODFLOW-2000: U.S. Geological Survey Fact Sheet FS-059-98, 2 p.

ADV fact sheet, Portable Document Format (PDF) (162K)

Anderman, E.R., and Hill, M.C., 2000, MODFLOW-2000, the U.S. Geological Survey modular ground-water model -- Documentation of the Hydrogeologic-Unit Flow (HUF) Package: U.S. Geological Survey Open-File Report 00-342, 89 p.

HUF Package Documentation, Portable Document Format (PDF) (543K)

Anderman, E.R., Kipp, K.L., Hill, M.C., Valstar, Johan, and Neupauer, R.M., 2002, MODFLOW-2000, the U.S. Geological Survey modular ground-water model -- Documentation of the Model-Layer Variable-Direction Horizontal Anisotropy (LVDA) capability of the Hydrogeologic-Unit Flow (HUF) Package: U.S. Geological Survey Open-File Report 02-409, 60 p.

HUF Package: LVDA Capability Documentation, Portable Document Format (PDF) (940K)

Anderman, E.R., and Hill, M.C., 2003, MODFLOW-2000, the U.S. Geological Survey modular ground-water model -- Three additions to the Hydrogeologic-Unit Flow (HUF) Package: Alternative storage for the uppermost active cells, Flows in hydrogeologic units, and the Hydraulic-coductivity depth-dependence (KDEP) capability: U.S. Geological Survey Open-File Report 03-347, 36 p.

HUF2 Package Documentation, Three Additions, Portable Document Format (PDF) (423K)

Banta, E.R., 2000, MODFLOW-2000, the U.S. Geological Survey modular ground-water model -- Documentation of packages for simulating evapotranspiration with a segmented function (ETS1) and drains with return flow (DRT1): U.S. Geological Survey Open-File Report 00-466, 127 p.

ETS1 and DRT1 Packages Documentation, Portable Document Format (PDF) (498K)

Merritt, L.M. and Konikow, L.F., 2000, Documentation of a computer program to simulate lake-aquifer interaction using the MODFLOW ground-water flow model and the MOC3D solute-transport model: U.S. Geological Survey Water-Resources Investigations Report 00-4167, 146 p.

Lake Package Documentation, Portable Document Format (PDF) (6283K)

Hanson, R.T. and Leake, S.A., 1999, Documentation of HYDMOD, a program for extracting and processing time-series data from the U.S. Geological Survey's modular three-dimensional finite-difference ground-water flow model: U.S. Geological Survey Open-File Report 98-564, 57 p.

HYDMOD Package Documentation, Portable Document Format (PDF) (662K)

Jobson, H.E. and Harbaugh, A.W., 1999, Modifications to the diffusion analogy surface-water flow model (DAFLOW) for coupling to the moddular finite-difference ground-water flow model (MODFLOW): U.S. Geological Survey Open-File Report 99-217, 107 p.

DAFLOW Package Documentation, Portable Document Format (PDF) (341K)

Harbaugh, A.W., and 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: U.S. Geological Survey Open-File Report 96-485, 56 p.

User's Documentation, Portable Document Format (PDF) (138K)

Harbaugh, A.W., and McDonald, M.G., 1996, Programmer's documentation for MODFLOW-96, an update to the U.S. Geological Survey modular finite-difference ground-water flow model: U.S. Geological Survey Open-File Report 96-486, 220 p.

Programmer's Documentation, Portable Document Format (PDF) (417K)

Leake, S.A., and Lilly, M.R., 1997, Documentation of a computer program (FHB1) for assignment of transient specified-flow and specified-head boundaries in applications of the modular finite- difference ground- water flow model (MODFLOW): U.S. Geological Survey Open- File Report 97-571, 50 p.

FHB1 Package Documentation, Portable Document Format (PDF) (343K)

Fenske, J.P., Leake, S.A., and Prudic, D.E., 1996, Documentation of a computer program (RES1) to simulate leakage from reservoirs using the modular finite- difference ground-water flow model (MODFLOW): U.S. Geological Survey Open-File Report 96-364, 51 p.

RES1 Package Documentation, Portable Document Format (PDF) (104K)

Hsieh, P.A., and Freckleton, J.R., 1993, Documentation of a computer program to simulate horizontal-flow barriers using the U.S. Geological Survey modular three- dimensional finite-difference ground-water flow model: U.S. Geological Survey Open-File Report 92-477, 32 p. (Note: the input instructions in this documentation are outdated. Use the input instructions in Harbaugh and others (2000) instead.)

HFB Package Documentation, Portable Document Format (PDF) (2.1 Mb)

Harbaugh, A.W., 1995, Direct solution package based on alternating diagonal ordering for the U.S. Geological Survey modular finite-difference ground-water flow model: U.S. Geological Survey Open-File Report 95-288, 46 p.

DE45 Package Documentation, Portable Document Format (PDF) (88K)

Leake, S.A., and Prudic, D.E., 1991, Documentation of a computer program to simulate aquifer-system compaction using the modular finite-difference ground-water flow model: U.S. Geological Survey Techniques of Water- Resources Investigations, book 6, chap. A2, 68 p. (IBS and CHD packages).

McDonald, M.G., and Harbaugh, A.W., 1988, A modular three- dimensional finite-difference ground-water flow model: U.S. Geological Survey Techniques of Water-Resources Investigations, book 6, chap. A1, 586 p.

Hill, M.C., 1990, Preconditioned conjugate-gradient 2 (PCG2), a computer program for solving ground-water flow equations: U.S. Geological Survey Water-Resources Investigations Report 90-4048, 43 p.

PCG2 Package Documentation (second printing), Portable Document Format (PDF) (578K)

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Last Iteration: February 23, 2009