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Hydraulic Gradient

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Hydraulic Gradient

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The rate of change in the total hydraulic head per unit distance of flow in a given direction .


The slope of the water table or piezometric surface. This is the change in the hydraulic head over a certain distance.  Mathematically it is the difference in hydraulic head over a distance along the flow path between two points.

Why is hydraulic gradient important?

Hydraulic gradient provides an indication of the direction of groundwater flow.