关键词: 挟沙水流, 冲刷深度, 水流强度, 来沙条件

Abstract:

Based on the research of limit scour depth of rough layers scoured by clean water, and by combining with the indoor generalized flume experiment, we explored the erosion issues of river bed scoured by sediment-laden flow. The experimental results of the scouring depth under different sediment supply show that with the increase of sediment supply rate per unit width, the scour depth decreases, and there is a linear correlation between relative scour depth and relative sediment conditions. On the basis of Einstein bed load transport rate formula, we established a calculation formula of bed scour depth considering the runoff, sediment and bed conditions. Comparison of the calculated value and the measured value shows that the calculated values agree well with the measured ones.

Key words: sediment-laden flow, scour depth, flow intensity, sediment supply