Aquifer: A formation, group of formations, or part of a formation that contains sufficient saturated, permeable material to yield significant quantities of water to wells and springs.
This interface provides a map view of the locations of sites with USGS water data. Google Maps are used to provide speed and versatility in a format that is familiar to many users.
The USGS National Water Information System (NWIS) contains extensive water data for the Nation. Public access to many of these data is provided via NWISWeb (additional background).
ASCE/EWRI Standard 50-08 provides current guidelines for fitting saturated hydraulic conductivity using probability density functions. Standard ASCE/EWRI 51-08 addresses the...
As the Nation's concerns over water resources and the environment increase, the importance of considering ground water and surface water as a single resource has become...
1999–2013 Advanced Technology Environmental and Energy Center | Leave Feedback