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2. Groundwater may leave the aquifer and become surface water at the “ zone of discharge ”, may pump out on its own (when under pressure) through an “ artesian well ”, or may be accessed by drilling wells
1. Occurs when a body of water is drained faster than it is filled ; may occur in surface water or groundwater Ex. The Ogallala aquifer is the largest aquifer in the world and supplies water to 8 midwestern states; the water in this aquifer is expected to last only 40 more years