Effect of Sedimentation Cleaning by Jet Flow on Increasing Sediment Transporting Capacity in Tongguan Section

The paper analyzes the factors that effect sediment-transporting capacity and effect of jet flow in Tongguan section and preliminarily calculates the function of sedimentation cleaning by jet flow for increasing sediment-transporting capacity based on the mechanism of sediment transport and field testing data of sedimentation cleaning by jet flow at Tongguan section. It is considered through the study that on the one hand it makes water muddy through jet pump and increases sediment concentration of flow, on the other hand it improves the jetted channel morphology, makes the channel narrower and deeper and increases the sediment-transporting capacity of the channel. It is shown by the preliminary results that the increased volume of sediment transport through sedimentation cleaning by jet flow is about 1.6 times of that by jet flow.