New & Noteworthy

 Press Release: Deficit in Nation's Aquifers Accelerating

 MODFLOW-USG: An Unstructured Grid Version of MODFLOW

 USGS Threatened and Endangered Stations

 Report to Congress: Progress Toward Establishing a National Assessment of Water Availability and Use

 Fact Sheet: Understanding and Managing the Effects of Groundwater Pumping on Streamflow

  Annotated List of Classic Pre-1980 USGS Groundwater Papers on Quantitative Groundwater-Flow Analysis

  WaterNow: Get current water conditions by text or email

  Circular: Streamflow Depletion By Wells: Understanding and Managing the Effects of Groundwater Pumping on Streamflow

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.

Artificial Recharge

Artificial recharge is the practice of increasing by artificial means the amount of water that enters a groundwater reservoir (Todd, 1959). This includes, for example, direction of water to the land surface through canals, irrigation furrows or sprinkler systems, and injection of water into the subsurface through wells.

Selected References & Resources:

• USGS Artificial Recharge Workshop Proceedings, Sacramento, California, April 2-4, 2002 (OFR 02-89)
• What is Aquifer Storage and Recovery?
• Aquifer Storage and Recovery projects in south Florida
• Equus Beds Groundwater Recharge Demonstration Project (Kansas)
• Artificial Recharge Projects in California
  • Groundwater Recharge and Distribution of Chlorides in the San Joaquin Valley
  • Injection, Storage, and Extraction of Water, Roseville
  • San Gorgornio Pass Artificial Recharge Investigation
  • Warren Subbasin Artificial Recharge
• Historical Overview of Hydrologic Studies of Artificial Recharge in the USGS
• Historical References
  • Historical References for Artificial Recharge Studies in the USGS
  • Annotated bibliography on artificial recharge of ground water, 1955-67 (Water-Supply Paper 1990)
  • Annotated bibliography on artificial recharge of ground water through 1954 (Water-Supply Paper 1477)
• Examples of Innovative Approaches that Contribute to Ground-Water Sustainability from Alley, W.M., Reilly, T.E., and Franke, O.L., Sustainability of Ground-Water Resources, USGS Circular 1186
• Evolving issues and practices in managing ground-water resources - Case studies on the role of science (Circular 1247)
• Applied Geophysical Research
  • Monitoring rate-limited mass transfer using geophysics
  • Toward minimally invasive performance monitoring: applications of time-lapse geophysical imaging to aquifer storage and recovery and engineered remediation
  • Toward real-time continuous, automated hydrogeophysical monitoring of aquifer storage and recovery - results of a pilot-scale experiment, Charleston, South Carolina
  • Borehole-geophysical research at aquifer storage and recovery research site in Charleston, South Carolina