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- Differential of pressure causing flow in a fluid system, usually expressed in terms of the height of a liquid column that pressure will support. The difference in number of feet between two water surface elevations. Height of water above a specified point. The back-pressure against a pump. The vertical distance between two points in a fluid. The vertical distance that would statically result from the velocity of a moving fluid.
Bureau of Reclamation - Cite This Source - This Definition - Brake horsepower, Capillary head, Cavitation, Cirque, drawdown, Pressure head, Sluice, Static head, Unbalanced head., Vortex
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