New in GWRP

• Regional Ground-Water Studies
  • Ground-Water Availability in the United States
• Water Availability Pilot
  • Consumptive water use coefficients for Great Lakes Basin
• Ground Water & the Environment
  • Ground-Water Recharge in Southwestern US
• Methods & Modeling
  • SEAWAT v4--Simulation of 3D variable-density ground--water flow and transport
• Data & Information
  • Water-Level changes in aquifers of the Atlantic Coastal Plain, predevelopment to 2000

USGS in Your State

USGS Water Science Centers are located in each state.

Data & Information

One of the goals of the USGS Ground-Water Resources Program (GWRP) is to identify, describe, and make available fundamental information regarding ground-water availability in the Nation's major aquifer systems.

Ground-Water Level Data

Measurements of ground-water levels from wells are used to monitor changes in ground-water conditions due to climate variability and withdrawals (pumping). The GWRP has supported the development of a Ground-Water Climate-Response Network, a network of wells selected to illustrate the response of the ground-water system to climate variations nationwide.

The Climate Response Network Web site is part of the USGS Ground-Water Watch web site, which is the official USGS Web site for illustrating current ground-water conditions in the United States and Puerto Rico.

Regional Evaluations of Ground-Water Levels

The GWRP also supports the regional evaluations of ground-water levels in areas of the country where ground-water resources have undergone intensive development. Recent examples include:

• High Plains Aquifer
• Atlantic Coastal Plain Aquifers (SIR 2007-5247)
• Sparta-Memphis Aquifer (SIM 3014)