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针对汾河水库淤积严重的现实,山西省委、省政府决定从1988年开始对水库上游地区进行重点治理。1988~1997年首期治理结束,治理区新建坝库103座,淤成坝地1020hm2,完成滩地治理2800hm2,累计完成梯田224万hm2、水保林663万hm2、经济林084万hm2、封山育林396万hm2。根据汾河水库38年降水、径流、泥沙资料,采用水土保持法与水文法进行分析,10年重点治理水保措施年减少入库泥沙量约500万m3,减沙效率达45%~50%;年减少入库径流量约05亿m3,减水率达10%~14%。在水保措施减沙中,淤地坝和引洪治滩工程的减沙量占治理措施总减沙量的近60%。
In view of the serious siltation of Fenhe Reservoir, Shanxi Provincial Party Committee and Government decided to start the key control of the upper reaches of the reservoir from 1988. 1988-1997 the first phase of the end of the governance, the management area of the new dam 103, silt dam 1020hm2, completed beach land management 2800hm2, completed a total of 22,400 hm2 terraces, water and forest 6 6,300 hm2, economic forest 0 84 Wan hm2, closing hillsides afforestation 3,600 hm2. According to the data of 38 years of precipitation, runoff and sediment in Fenhe Reservoir, the soil and water conservation laws and hydrological laws were used for the analysis. During the 10 years, key measures of water and soil conservation measures were put in place to reduce the sediment load by about 5 million m3 and the sedimentation efficiency by 45% 50% of the total; and the annual reduction in runoff storage volume is about 050 million m3, and the water reduction rate is 10% -14%. In the sand erosion mitigation measures, silt dam and flood diversion project accounts for nearly 60% of total sediment reduction.