dQ = volume of water released or restored dfi = change of water table or piezometric surface

Thus, if an unconfined aquifer releases 2 m3 water as a result of dropping the water table by 2m over a horizontal area of 10 m2, the storativity is 0.1 or 10%.


Storativity, also known as the coefficient of storage or specific yield, is the volume of water yielded or released per


Bouwer, H. 1978. Groundwater hydrology. McGraw-Hill, Inc.

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