Sediment transport is one of the basic issues in the field of river dynamics.The sediment transport nature in fully mobile bed compound channels was experimentally studied under the action of clear water and then the method for modeling the sediment transport rate in the type of channels was proposed.The experimental results showed that the sediment transport rate first increases and then decreases with time.The median diameter of sediment first rapidly and then slowly increases with time,and finally approach the median diameter of the original bed material.According to the motion nature of sediment transport,the computational method for sediment transport rate in the type of channel was proposed.Meanwhile,the sensitivity analysis of parameters in the proposed method was undertaken.The computed results showed that the method can be capable of modeling the sediment transport in the processes of clear-water action.
