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USGS Groundwater Information

Groundwater Resources Program

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 [Photo: Groundwater flowing out of well.]

New & Noteworthy

* HydroClimATe -- Hydrologic and Climatic Analysis Toolkit

* National Groundwater Awareness Week 2014

* National Brackish Groundwater Assessment

* Press Release: New USGS Tool Expedites Assessment of Seawater Intrusion in Coastal Aquifer Systems

* Press Release: Deficit in Nation's Aquifers Accelerating

* Press Release: New USGS Report Updates Decline of High Plains Aquifer Groundwater Levels

* Technical Announcement: How Does Groundwater Pumping Affect Streamflow?

Past listings...

USGS Groundwater Watch

USGS maintains a network of active wells to provide basic statistics about groundwater levels.

 [Image: USGS active water level wells location map.]

Other Water Topics

*  Water Resources

*  Groundwater

*  Surface Water

*  Water Quality

*  Water Use

USGS in Your State

USGS Water Science Centers are located in each state.

 [Map: There is a USGS Water Science Center office in each State.] Washington Oregon California Idaho Nevada Montana Wyoming Utah Colorado Arizona New Mexico North Dakota South Dakota Nebraska Kansas Oklahoma Texas Minnesota Iowa Missouri Arkansas Louisiana Wisconsin Illinois Mississippi Michigan Indiana Ohio Kentucky Tennessee Alabama Pennsylvania West Virginia Georgia Florida Caribbean Alaska Hawaii and Pacific Islands New York Vermont New Hampshire Maine Massachusetts South Carolina North Carolina Rhode Island Virginia Connecticut New Jersey Maryland-Delaware-D.C.

Groundwater Model Development

The USGS is at the forefront of devising new techniques to solve practical problems in the study of groundwater resources. Predictive models are needed to make informed decisions in many emerging areas related to the effects of groundwater development. New models and methods enhance all USGS water programs. State and local governments as well as groundwater scientists and engineers in the private sector regularly use USGS models as an integral part of their work.

The USGS Modular Groundwater Flow Model (MODFLOW) is the most widely used program in the world for simulating groundwater flow. The USGS developed MODFLOW in the early 1980s. The Groundwater Resources Program (GWRP) continues to support the enhancement of MODFLOW with updates that help scientists and engineers simulate common features in groundwater systems. New features have been added and the software has been updated to incorporate advancements in our understanding of groundwater hydrology, to respond to changes in user needs, and to take advantage of constantly increasing computer power and speeds.

Below are examples of and links to USGS groundwater software:

Recently Released USGS Groundwater Software RSS

USGS releases new software and updates existing software on an ongoing basis. The USGS software packages listed here are the most recent groundwater software releases and updates.

HydroClimATe 1.0.0

Apr 08, 2014: HydroClimATe v.1.0.0 has been released. The Hydrologic and Climatic Analysis Toolkit (HydroClimATe) is a computer program for assessing the relations among variable climatic and hydrologic time-series data. This is the initial release.


Mar 21, 2014: MODFLOW-USG v.1.2.00 has been released. MODFLOW-USG is an unstructured grid version of MODFLOW for simulating groundwater flow and tightly coupled processes using a control volume finite-difference formulation. This version includes several changes and bug fixes. Refer to the release.txt file for complete list of changes.


Mar 13, 2014: SutraGUI v. has been released. SUTRAGUI is a graphical pre- and post-processor for SUTRA. This is a minor update. This version removed the UCODE checkbox because UCODE support has not been finalized.


Mar 11, 2014: ModelMuse v. has been released. ModelMuse is a graphical user interface (GUI) for MODFLOW-2005, MODFLOW-LGR, MODFLOW-LGR2, MODFLOW-NWT, MT3DMS, SUTRA, PHAST, MODPATH, and ZONEBUDGET. This version includes several enhancements, chanages, and bug fixes. ModelMuse now supports SUTRA and MODFLOW-LGR v2. ModelMuse can now import MODFLOW-NWT models. Refer to the version history for complete list of changes.

Utility PIEs

Mar 11, 2014: Utility PIEs v. has been released. These are programs for simplifying the analysis of geographic information in U.S. Geological Survey ground-water models for use within Argus Open Numerical Environments (Argus ONE) This release fixed bug that could prevent values from being imported from Shapefiles.


Mar 11, 2014: GW_Chart v. has been released. GW_Chart is a graphing application for MODFLOW, MOC3D, ZONEBUDGET, SUTRA, MT3D, HST3D. UCODE-2005, and OPR-PPR. GW_Chart also draws Piper diagrams and converts binary cell-by-cell flow files to text files. This version added support for reading HYDMOD output. Refer to the revision history for a complete list of changes.


Feb 28, 2014: SutraGUI v. has been released. SUTRAGUI is a graphical pre- and post-processor for SUTRA. This version fixed bug in PostProcessing dialog box that would make it unresponsive.


Jan 29, 2014: GW_Chart v. has been released. GW_Chart is a graphing application for MODFLOW, MOC3D, ZONEBUDGET, SUTRA, MT3D, HST3D. UCODE-2005, and OPR-PPR. GW_Chart also draws Piper diagrams and converts binary cell-by-cell flow files to text files. This version of GW_Chart fixed bug that caused GW_Chart to hang if an invalid numeric code for a color was specified by the user in a Piper diagram.

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Selected USGS Groundwater Software

The software packages below are examples of key USGS groundwater software that has been developed with GWRP support.

Farm Process (FMP)

Farm Process estimates dynamically integrated supply-and-demand components of irrigated agriculture as part of the simulation of surface-water and groundwater flow based on MODFLOW-2000 and MODFLOW-2005.

GSFLOW: Groundwater and Surface-Water Flow Model

GSFLOW is a coupled groundwater and surface-water flow model based on the USGS Precipitation-Runoff Modeling System (PRMS) and MODFLOW-2005.

GWM-2005 with LGR

Groundwater Management Model Process 2005 is a Groundwater Management Process for the USGS modular three-dimensional groundwater model, MODFLOW-2005, using optimization with local grid refinement (LGR) capability.


MODFLOW-LGR is a version of MODFLOW-2005 with local grid refinement.

SEAWAT: 3D Variable-Density Groundwater Flow and Transport

SEAWAT is a generic MODFLOW/MT3DMS-based computer program designed to simulate three-dimensional variable-density groundwater flow coupled with multi-species solute and heat transport.

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For More Information:

For more information or to download USGS groundwater software and supporting documentation, visit USGS Groundwater Software.

You can also learn more about how the USGS continues to lead in the development and application of groundwater modeling software.

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Page Last Modified: Wednesday, 27-Nov-2013 14:24:59 EST