cone of water table depression

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• Cone of depression — A cone of depression occurs in an aquifer when groundwater is pumped from a well. In an unconfined aquifer (water table), this is an actual depression of the water levels. In confined aquifers (artesian), the cone of depression is a reduction in… …   Wikipedia

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• radius of influence —    The radial distance from the center of a well bore to the point where there is no lowering of the water table or potentiometric surface (the edge of its cone of depression) [6] …   Lexicon of Cave and Karst Terminology