通过流域34年实测水文资料及水利、水土保持各项措施的典型调查资料，采用“水文法”和“水保法”分别分析计算流域20年水利、水土保持措施综合治理的减水减沙效益，其结果为：用水文法计算，其平均减水效益为22．3％，消洪效益为17．7％，减沙效益为21．2％；用水保法计算，其减水效益为11．8％，减沙效益为20．7％，两种方法计算结果基本吻合，可以作为该类型区流域规划治理宏观决策的科学依据。 Through the typical survey data of 34 years of measured hydrological data, water conservancy and soil and water conservation measures in the basin, the “hydrological law” and “water and soil conservation law” were respectively used to analyze and calculate the water and sediment reduction benefit of comprehensive management of water conservancy and soil and water conservation measures for 20 years , The result is: calculated by hydrological method, the average water reduction benefit is 22.3%, flood reduction benefit is 17.7% and sand reduction benefit is 21.2%; 8% and sand reduction benefit is 20.7%. The calculated results of the two methods are in good agreement with each other and can be used as the scientific basis for macroscopic decision-making in river basin planning and management.