Analyzing the relation between AR and SRR of check dam, SRR can reach 40% and the efficiency of reducing sediment presents prominent if AR of check dam in Huangfuchuan Basin is more than 2%.

• 从各支流淤地坝配置占比与减沙占比的关系看，皇甫川流域只要淤地坝配置占比达到2%25以上，减沙占比即可达到40%25，减沙效益明显；