USGS: Science Topics: aquifers

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Aquifers

Bodies of rock that contain sufficient saturated permeable material to conduct ground water and to yield significant quantities of water to wells and springs. [Glossary of Geology, 4th ed.]

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Water resources of Webster Parish [More info]: In 2005, about 9.52 million gallons per day (Mgal/d) of water were withdrawn, including about 9.33 Mgal/d from groundwater and 0.19 Mgal/d from surface-water. Public supply use accounted for 70% of the total.
Water science for schools: the Earth's water - ground water [More info]: Educational site for elementary schools students on ground water sources, ground water flow, and aquifers.
Water-Level Changes in the High Plains Aquifer, Predevelopment to 2002, 1980 to 2002, and 2001 to 2002 [More info]: Data from some 7,000 wells monitoring annual water level changes in the High Plains aquifer indicting changes in water level 1980 to 2002.
WaterSMART-The Colorado River Basin focus-area study [More info]: Explains the strategy that USGS will use to estimate the distribution and abundance of freshwater resources, evaluate factors affecting availability, estimate undeveloped potential resources, and forecasting likely changes due to other factors.
Watershed modeling applications in south Texas [More info]: Explains how mathematical simulations of watershed properties can help us understand the likely behavior of the water systems, putting the choices available to people in better perspective.

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