Near-Bed Sediment Concentration in Non-Uniform Flows Over Gravel Beds

by Carlos V. Alonso, USDA-ARS, United States,



Document Type: Proceeding Paper

Part of: Soil Properties Evaluation from Centrifugal Models and Field Performance

Abstract:

The calculation of near-bed sediment concentration is formulated in terms of equations governing the dispersion of heavy particles in non-uniform turbulent shear flows over stable gravel beds. The equations take into account the material properties of suspended sediment particles and the effect of a permeable rough bed surface on the mean velocity distribution of the carrying flow. The equations are solved analytically using various combinations of suspended load and flow conditions. The effect of these conditions on the near-bed sediment concentration is illustrated.

Subject Headings: Suspended loads | Sediment | Nonuniform flow | Bed materials | Suspended sediment | Turbulent flow | Gravels

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