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The Great Artesian Basin (GAB) [1] of Australia is the largest and deepest artesian basin in the world, extending over 1,700,000 square kilometres (660,000 sq mi). Measured water temperatures range from 30 to 100 °C (86 to 212 °F). The basin provides the only source of fresh water through much of inland Australia. [2]
An artesian well is a well that brings groundwater to the surface without pumping because it is under pressure within a body of rock or sediment known as an aquifer. [1] When trapped water in an aquifer is surrounded by layers of impermeable rock or clay, which apply positive pressure to the water, it is known as an artesian aquifer. [1]
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.
The Great Artesian Basin situated in Australia is arguably the largest groundwater aquifer in the world (over 1.7 million km 2 or 0.66 million sq mi). [23] It plays a large part in water supplies for Queensland, and some remote parts of South Australia.
California Central Valley aquifer system; Eastern Snake River Plain Aquifer; Edwards Aquifer; Englishtown aquifer; Floridan aquifer; Great Miami aquifer; Kirkwood–Cohansey aquifer; Lloyd aquifer; Magothy aquifer – largest of Long Island's aquifers; Mahomet Aquifer; Medina aquifer; Mt. Laurel–Wenonah aquifer; Ogallala Aquifer, also known ...
The Great Artesian Basin is one of the largest artesian systems in the world and occupies about 22% of the Australian continent. Artesian springs lie around the rim of the GAB, occurring in complexes of springs known as a "supergroup", and are the natural outlets of the artesian aquifers from which groundwater of the GAB flows to the surface.
The Great Artesian Basin in central and eastern Australia is one of the largest confined aquifer systems in the world, extending for almost 2 million km 2. By analysing the trace elements in water sourced from deep underground, hydrogeologists have been able to determine that water extracted from these aquifers can be more than 1 million years old.
The Ogallala Aquifer (oh-gə-LAH-lə) is a shallow water table aquifer surrounded by sand, silt, clay, and gravel located beneath the Great Plains in the United States. As one of the world's largest aquifers, it underlies an area of approximately 174,000 sq mi (450,000 km 2) in portions of eight states (South Dakota, Nebraska, Wyoming, Colorado, Kansas, Oklahoma, New Mexico, and Texas). [1]