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hydraulic geometry


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A description of the adjustments made by a stream in response to changes in discharge, both at a cross-section and in the downstream direction. Adjustments are made in width, mean depth, mean velocity, slope, frictional resistance, suspended-sediment load, and water-surface gradient. The relationship between discharge and adjustment is expressed as a power function: y = aQb, where y is the adjusting variable, Q is discharge, and a and b are coefficients.

Subjects: Earth Sciences and Geography.


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