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Influence of secondary current on vertical concentration distribution in an open channel flow

Considering the effect of secondary current for a steady turbulent flow through straight rectangular open channels, analytical models for suspended sediment concentration distribution are derived from two-phase flow analysis. The proposed models significantly improve the Rouse equation and show that secondary currents have considerable effect on sediment concentration distribution. Finally, models are verified with the experimental data available in the literature, and a good agreement has been achieved between the calculated values and observed data.