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Groundwater is subsurface water in porous strata within a zone of saturation. Aquifers are groundwater formations capable of furnishing an economical water supply. Those formations from which extractions cannot be made economically are called aquicludes.

Permeability indicates the ease with which water moves through a soil and determines whether a groundwater formation is an aquifer or aquiclude.

The rate of movement of groundwater is given by
Darcy’s law:


Q =flow rate, gal/day (m3/day)

K= hydraulic conductivity, ft/day (m/day)

I =hydraulic gradient, ft/ft (m/m)

A =cross-sectional area, perpendicular to direction of flow, ft2 (m2)

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Kanwarjot Singh

Kanwarjot Singh is the founder of Civil Engineering Portal, a leading civil engineering website which has been awarded as the best online publication by CIDC. He did his BE civil from Thapar University, Patiala and has been working on this website with his team of Civil Engineers.

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