Aquifer

Science / Geology / Aquifer: A subsurface rock or sediment unit that is porous and permeable. To be an aquifer it must have these traits to a high enough degree that it stores and transmits useful quantities of water.

Aquifer (Confined)

Science / Geology / Aquifer (Confined): An aquifer that is bounded above and below by impermeable rock or sediment layers. There may or may not be enough pressure in the aquifer to make it an 'artesian aquifer'. MORE

Aquifer (Artesian)

Science / Geology / Aquifer (Artesian): An aquifer that is bounded above and below by impermeable rock or sediment layers. The water in the aquifer is also under enough pressure that, when the aquifer is tapped by a well, the water rises up MORE

Aquifer (Unconfined)

Science / Geology / Aquifer (Unconfined): An aquifer that is not overlain by an impermeable rock unit. The water in this aquifer is under atmospheric pressure and is recharged by precipitation that falls on the land surface directly above the MORE

Recharge Area

Science / Geology / Recharge Area: The geographic area where water infiltrates into the ground and enters an aquifer. MORE

Flowing Well

Science / Geology / Flowing Well: A well that taps an aquifer that is under enough pressure to force water to the surface. Caused when the aquifer has a recharge area at a higher elevation. MORE

Recharge

Science / Geology / Recharge: Water added to an aquifer or other water body. An aquifer is recharged by precipitation in an area where the aquifer has a porous connection to the surface. MORE

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