Experimental Modeling of Suspended Sediment Transport Considering the Flow Rate and Grain Size

摘要

In this study, laboratory sediment disposal tests were performed using an open channel, and the behavior of soil particles underwater was analyzed according to flow rate and grain size. For each grain size, the deposition distributions of soil particles were demonstrated to have log-normal distributions regardless of the flow rate. The relationships between the average and standard deviation of the deposition distance and the flow rate can be expressed using a quadratic regression equation, and the relationships between the average and standard deviation of deposition distance and the grain size can be expressed using a two-term exponential decay equation. As a result, a simple experimental model was proposed for predicting the soil transportation and deposition distribution considering the flow rate and grain size. The proposed model was validated by comparison with the test results for each grain size and a mixed soil, which was collected from another area, and the proposed model showed good agreement with the experimental results.