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Works by or about United States Geological Survey at the Internet Archive; Mytopo historical maps hosts historical USGS topos in the northeast U.S. U.S. Geological Survey Documents at Texas Tech University 1873–2015; Historic technical reports from USGS (and other Federal agencies) are available in the Technical Report Archive and Image ...
The Edwards Aquifer Authority (EAA) and the United States Geological Survey (USGS) have monitored annual well and spring discharges since 1934. Annual well discharge—the sum of all well discharges in a year— ranged from 219,300 to 542,500 acre-feet (271 to 669 GL) between 1955 and 2012.
This map of United States water resource subregion hydrologic units updated boundaries to include the ocean as well as the portions of the basins that cross international borders For the use of hydrologists, ecologists, and water-resource managers in the study of surface water flows in the United States, the United States Geological Survey ...
From 2004 to 2011, he served as senior science advisor for earthquake and geologic hazards at the United States Geological Survey. Since May 2011, he has served as associate director of the USGS for natural hazards.
The hydrogeologic framework of the Floridan aquifer system was revised by the U.S. Geological Survey in 2015. [10] The extent of the system was revised to include some of the updip clastic facies which grade laterally into the Lower Floridan aquifer and have been previously included in the Southeastern Coastal Plain aquifer system, the Floridan ...
Aquifers of the United States Withdrawal rates from the Ogallala Aquifer.. This is a list of some aquifers in the United States.. Map of major US aquifers by rock type. An aquifer is a geologic formation, a group of formations, or a part of a formation that contains sufficient saturated permeable material to yield significant quantities of water to groundwater wells and springs.
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He served as the leader of USGS water science from 1994 to 2008 when Dr. Hirsch transitioned to the USGS National Research Program to rededicate himself to advancing the science on critical issues of climate change and long-term trends in water resources. He began his USGS career in 1976 as a hydrologist and has conducted research on water ...