deposits of clay, silt, sand, gravel, or other particulate material that has been deposited by a stream or other body of running water in a streambed, on a flood plain, on a delta, or at the base of a mountain.

Atmospheric Ocean General Circulation Models

the system for allocating water to private individuals used in most Western states. The doctrine of Prior Appropriation was in common use throughout the arid west as early settlers and miners began to develop the land. The prior...

farming of plants and animals that live in water, such as fish, shellfish, and algae.

a pipe, conduit, or channel designed to transport water from a remote source, usually by gravity.

a geologic formation(s) that is water bearing. A geological formation or structure that stores and/or transmits water, such as to wells and springs. Use of the term is usually restricted to those water-bearing formations capable of...

soil or rock below the land surface that is saturated with water. There are layers of impermeable material both above and below it and it is under pressure so that when the aquifer is penetrated by a well, the water will rise above the...

an aquifer whose upper water surface (water table) is at atmospheric pressure, and thus is able to rise and fall.

Average Recurrence Interval

groundwater that is under pressure when tapped by a well and is able to rise above the level at which it is first encountered. It may or may not flow out at ground level. The pressure in such an aquifer commonly is called artesian...

an process where water is put back into groundwater storage from surface-water supplies such as irrigation, or induced infiltration from streams or wells.

Association of South East Asian Nations