USGS Groundwater Information
Groundwater Resources Program
New & Noteworthy
Press Release: Deficit in Nation's Aquifers Accelerating
Technical Announcement: How Does Groundwater Pumping Affect Streamflow?
USGS Groundwater Watch
USGS maintains a network of active wells to provide basic statistics about groundwater levels.
Other Water Topics
USGS in Your State
USGS Water Science Centers are located in each state.
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:
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.
Jun 24, 2014: MODFLOW-NWT v.1.0.9 has been released. MODFLOW-NWT is a Newton formulation for MODFLOW-2005. MODFLOW-NWT is a standalone program that is intended for solving problems involving drying and rewetting nonlinearities of the unconfined groundwater-flow equation. This version includes multiple bug fixes. A Multi-Node Well (MNW2) Package bug was fixed that was causing the cell to well transmissivity to incorrectly be set to zero. Refer to the revision history for complete list of changes.
May 28, 2014: ModelMuse v.3.2.1 has been released. ModelMuse is a graphical user interface (GUI) for MODFLOW-2005, MODFLOW-LGR, MODFLOW-LGR2, MODFLOW-NWT, MODFLOW-CFP, MT3DMS, SUTRA, PHAST, MODPATH, and ZONEBUDGET. This version includes two bug fixes. In MODFLOW-LGR and MODFLOW-LGR2 models, the display of data set values for child models when those values should be set using parameters has been fixed. The version number was also fixed.
May 28, 2014: ModelMuse v.3.2.0 has been released. ModelMuse is a graphical user interface (GUI) for MODFLOW-2005, MODFLOW-LGR, MODFLOW-LGR2, MODFLOW-NWT, MODFLOW-CFP, MT3DMS, SUTRA, PHAST, MODPATH, and ZONEBUDGET. This version includes multiple enhancements, chanages, and bug fixes. Whenever a new version of ModelMuse is used, it will now attempt to also use the newest version of ModelMonitor. Refer to the revision history for complete list of changes.
May 13, 2014: Scenario Tools v.1.0.0 has been released. Scenario Tools Scenario Manager and Scenario Analyzer are graphical user interfaces (GUIs) for managing and analyzing MODFLOW groundwater-model scenarios. This is the initial release.
May 13, 2014: ModelMuse v.22.214.171.124 has been released. ModelMuse is a graphical user interface (GUI) for MODFLOW-2005, MODFLOW-LGR, MODFLOW-LGR2, MODFLOW-NWT, MODFLOW-CFP, MT3DMS, SUTRA, PHAST, MODPATH, and ZONEBUDGET. This version includes two bug fixes. This release fixed using objects on the front or side views to define pipes in MODFLOW-CFP. This release fixed bug that could cause an access violation when opening the Object Properties dialog box.
13 Tue,, May: ModelMuse v.126.96.36.199 has been released. ModelMuse is a graphical user interface (GUI) for MODFLOW-2005, MODFLOW-LGR, MODFLOW-LGR2, MODFLOW-NWT, MODFLOW-CFP, MT3DMS, SUTRA, PHAST, MODPATH, and ZONEBUDGET. This version includes several enhancements, changes, and bug fixes. ModelMuse now supports MODFLOW-CFP. There is now an online version of the help. Refer to the version history for complete list of changes.
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.
Selected USGS Groundwater Software
The software packages below are examples of key USGS groundwater software that has been developed with GWRP support.
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 is a coupled groundwater and surface-water flow model based on the USGS Precipitation-Runoff Modeling System (PRMS) and MODFLOW-2005.
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 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.
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.