Based on the observed data

the characteristics of rainstorm

flood and sediment in the Tuwei River watershed was systematically analyzed. The results indicated that

the high sediment concentration flow of the Tuwei River was caused by the integrated action of freeze thaw

wind and water erosion

and the sediment delivery ratio of single rainstorm flood was less than 1. The sediment source in the watershed was also clarified. It provided scientific basis for watershed control in sandy and coarse sand areas in the middle reaches of the Yellow River.