More rough sandy area in the middle of the Yellow River is the main source of the Yellow River sediment,and it is also the area where the soil erosion of the Loess Plateau is the strongest.The sediment intercepted by the silt dams retains a large amount of erosion information,which provides the possibility to study soil erosion in areas lacking data.In this study,the cave wild river basin in the middle of the Yellow River was selected as the research object to analyze the characteristics of the silt dam deposits,study the erosion of sand production and sand source of the dam-control basin,and simulate soil erosion in different periods of the basin.The results showed that there is a significant correlation between sediment yield modulus and rainfall,showing a decreasing trend and the main source of sand is nudation.
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