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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.
Most of the sand and gravel of the Mahomet Aquifer is from the lower half of the Banner Formation and belongs to the Mahomet Sand Member which is buried 100 to 200 feet (30 to 61 m) below the ground surface. The aquifer underlies 1,260,000 acres (510,000 hectares) of land in east-central Illinois and spans 15 counties (Panno and Korab, 2000).
It is part of an aquifer system found in Mississippian or younger stratigraphic units in the Michigan Basin. [1] The aquifer covers approximately 11,000 square miles (28,000 km 2 ) [ 2 ] and is estimated to contain 4 cubic miles (17 km 3 ) of water, approximately 50 feet (15 m) to 400 feet (120 m) underground.
The following is a partial list of aquifers around the world. A category-based list of aquifers is also available. Africa. Bas Saharan Basin;
Watersheds of Illinois is a list of basins or catchment areas into which the State of Illinois can be divided based on the place to which water flows.. At the simplest level, in pre-settlement times, Illinois had two watersheds: the Mississippi River and Lake Michigan, with almost the entire State draining to the Mississippi, except for a small area within a few miles of the Lake.
In about a third of the 542 aquifers where researchers were able to analyze several decades of data, they found that depletion has been more severe in the 21st century than in the last 20 years of ...
2 Map of Mississippi River Basin. ... Mouth location Source coordinates Source location Apple River: Left 89 ... Illinois River: Left 432
The Sankoty aquifer is an aquifer in the U.S. state of Illinois that provides groundwater to a number of communities in northwestern and central Illinois. It is an unconsolidated deposit lying in a bedrock valley formerly occupied by the ancestral Mississippi River .