River-Bed Degradation Below Dams

by Saburo Komura,
Daryl B. Simons,

Serial Information: Journal of the Hydraulics Division, 1967, Vol. 93, Issue 4, Pg. 1-14

Document Type: Journal Paper


A differential equation for degradation is derived by considering variations in friction velocity, critical friction velocity, sediment size, depth of flow, and river width. The armoring effect for nonuniform bed material, which is an important factor in the analysis of degradation problems, is included in the theoretical analysis. Methods of predicting the river-bed degradation below dams are developed by using a differential equation. Numerical examples for a final equilibrium profile demonstrate applications of the method to rivers.

Subject Headings: River and stream beds | Chemical degradation | Dams | Differential equations | Friction | Bed materials | Numerical methods | Sediment

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