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通过广泛深入的调查研究，基本摸清了该区间淤地坝的规模、数量、质量及其分布状况，采取调查与分析相结合的办法，核实了坝地面积，确定了拦泥指标，采用“成因法”分析计算了该区自治理以来淤地坝的拦泥量和减蚀量，并以拦泥量与流域洪沙关系推算了其减洪量。结果表明：年均减洪量，５０～６０年代２２８４万ｍ３，７０年代３８２９万ｍ３，８０年代３３９８万ｍ３，效益分别为２．７８％，６．８９％，７．７７％；年均减沙量相应时段分别为１４５１，２５１３，２２８９万ｔ，效益分别为５．４７％，１３．４％，２０．４％；在流域综合治理减少总量中，由淤地坝影响的减洪量各时段分别占８０．８％，６７．６％，５４．２％，减沙量各时段占８３．５％，５８．５％，６６．４％。
Through extensive and thorough investigation and study, the scale, quantity, quality and distribution of the check dam in the interval have been basically ascertained. By combining the investigation and analysis, the area of the dam has been verified, The causation method was used to analyze the amount of sediment retained and the amount of erosion mitigated by dredging dams in this area since its establishment. The results showed that the annual average flood reduction was 22.84 million m3 in the 1950s-1960s, 33.89 million m3 in the 1980s and 1980s, and the effective rates were 2.78%, 6.89% and 7.77% respectively. The average annual sediment reduction The corresponding periods were 1451,2513,2289 million t, respectively, with benefits of 5.47%, 13.4% and 20.4%, respectively. Among the total amount of reduction in comprehensive management of the river basin, Accounting for 80.8%, 67.6% and 54.2% respectively. Sediment reduction accounted for 83.5%, 58.5% and 66.4% of the total time.