- A body of permeable and poorly permeable material that functions regionally as a water-yielding unit; it comprises two or more permeable beds separated at least locally by confining beds that impede ground-water movement but do not greatly affect the regional hydraulic continuity of the system; includes both saturated and unsaturated parts of permeable material .
A Lexicon of Cave and Karst Terminology with Special Reference to Environmental Karst Hydrology. Courtesy of the author & The Karst Waters Institute. 2002.
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Nubian Sandstone Aquifer System — The Nubian Sandstone Aquifer System (NSAS) is the world’s largest known fossil water aquifer system. It is located underground in the Eastern end of the Sahara Desert and spans the political boundaries of four countries in north eastern… … Wikipedia
Aquifer — Typical aquifer cross section An aquifer is a wet underground layer of water bearing permeable rock or unconsolidated materials (gravel, sand, or silt) from which groundwater can be usefully extracted using a water well. The study of water flow… … Wikipedia
aquifer — /ak weuh feuhr/, n. any geological formation containing or conducting ground water, esp. one that supplies the water for wells, springs, etc. [1900 05; prob. < F aquifère (adj.); see AQUI , FER] * * * In hydrology, a rock layer or sequence that… … Universalium
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Ogallala Aquifer — Saturated thickness of the Ogallala Aquifer in 1997 after several decades of intensive withdrawals: The breadth and depth of the aquifer generally decrease from north to south … Wikipedia
Surficial aquifer — [ Broward County, Florida] Surficial aquifers are shallow aquifers typically less than 50 feet (15m), but thicknesses of about 60 feet have been mapped. Composition Surficial aquifers system consists mostly of beds of unconsolidated sand, cavity… … Wikipedia
Biscayne Aquifer — The Biscayne Aquifer, named after Biscayne Bay, is a surficial aquifer. It is a shallow layer of highly permeable limestone under a portion of South Florida. The area it underlies includes Broward County, Miami Dade County, Monroe County, and… … Wikipedia
Mahomet Aquifer — The Mahomet Aquifer is the most important aquifer in east central Illinois. The sand and gravel aquifer is part of the buried Mahomet Bedrock Valley. It underlies 15 counties and ranges from 50 to 200 feet (15 to 60 m) thick. It supplies over 100 … Wikipedia
Floridan Aquifer — The Floridan Aquifer is a portion of the principal artesian aquifer that extends into Florida [cite web url=http://aquat1.ifas.ufl.edu/guide/aquifers.html title=Florida aquifers Plant Management in Florida Waters publisher=aquat1.ifas.ufl.edu… … Wikipedia
Edwards Aquifer — The Edwards Aquifer is one of the most prolific artesian aquifers in the world. Located on the eastern edge of Edwards Plateau in the U.S. state of Texas, it discharges about 900,000 acre feet (1.1 km³) of water a year and directly serves about… … Wikipedia