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- (agriculture) An underground geological formation, or group of formations, containing usable amounts of groundwater that can supply wells or springs for domestic, industrial, and irrigation uses. Removing more groundwater from an aquifer than is naturally replenished is called overdrafting, and can result in a dropping water table, increased pumping costs, land subsidence (which reduces the future recharge capacity), saltwater intrusion, reduced streamflows in interconnected ground- and surface-water systems, and exhaustion of groundwater reserves. Overdrafting groundwater occurs primarily in the Plains States and the West.
- (environment) An underground geological formation, or group of formations, containing water. Are sources of groundwater for wells and springs. Source: Terms of the Environment
- A permeable material through which groundwater moves.
Source: Leet, L. Don. 1982. Physical Geology, 6th Edition. Englewood Cliffs, NJ: Prentice-Hall
- A formation, a group of ions, or a part of a formation that is water bearing. AGI
- A stratum or zone below the surface of the Earth capable of producing water, as from a well. AGI
- An underground stratum that will yield water in sufficient quantity to be of value as a source of supply. An aquifer is not a stratum that merely contains water, for this would apply to all strata in the ground-water area. An aquifier must yield water. See also: aquitard Carson, 1
Source: Dictionary of Mining, Mineral, and Related Terms