Concentration Profile of Suspended Sediments in Open-Channel Flow at Steep Slopes

Experiments of mixture flow of fine sand and water are made in a steep open channel. Concentration profiles of suspended sand are measured. A two-layer model for the mixture flow is proposed; the lower layer of intergranular interactions and the upper layer of turbulent motion. Using the top of the lower layer as the reference level, the concentration profiles are calculated from the Rouse equation. The calculations are in good agreement with the experiments.