New & Noteworthy

 Estimated Water Use in the U.S. in 2005: Summary | Full Report | Data

 Fact Sheet: Effects of Climate Variability and Change on Groundwater Resources of the U.S.

 National Framework for Groundwater Monitoring

 ModelMuse: Graphical User Interface for MODFLOW-2005 and PHAST (TM 6-A29)

USGS Groundwater Watch

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

USGS in Your State

USGS Water Science Centers are located in each state.

Groundwater Techniques, Methods, and Models

• Groundwater Technical Memoranda
• USGS Techniques and Methods Reports (TM)
• USGS Techniques of Water-Resources Investigations (TWRI)
• Land Subsidence
  • CIMDAS - Center for InSAR Monitoring of Deforming Aquifer Systems
• Groundwater modeling software and recent publications
  • USGS Groundwater software
    • CFP: Conduit Flow Process for MODFLOW-2005
    • GSFLOW: A New Model for Simulation of Ground-Water and Surface-Water Interaction
    • SEAWAT v4: Simulation of 3D Variable-Density Ground-Water Flow and Transport
  • USGS Water Resources Applications Software
  • MODFLOW-2005 software and user guides
  • MODFLOW-2000software and user guides
  • List of USGS reports related to MODFLOW
  • User's Guide to SEAWAT: A Computer Program For Simulation of Three-Dimensional Variable-Density Ground-Water Flow
  • Updates to USGS Circular 1104
    • Appel, C.A., and Reilly, T.E., 1994, Summary of selected computer programs produced by the U.S. Geological Survey for simulation of ground-water flow and quality - 1994
  • Guidelines for evaluating ground-water flow models (SIR2004-5038)
  • System And Boundary Conceptualization In Ground-Water Flow Simulation (TWRI Book 3, Chapter B8)
  • GSFLOW: Coupled Ground-water and Surface-water FLOW model based on PRMS and MODFLOW-2005
• Geophysical tools
• Data Collection
  • Ground-Water Data-Collection Protocols and Procedures for the National Water-Quality Assessment Program: Selection, Installation, and Documentation of Wells, and Collection of Related Data (OFR 95-398)
  • Ground-Water Data-Collection Protocols and Procedures for the National Water-Quality Assessment Program: Collection and Documentation of Water-Quality Samples and Related Data (OFR 95-399)
• Water Use
  • Handbook for collecting water-use data