一、问题的提出刘家峡水库位于黄河上游的甘肃省永靖县境内,系一座综合利用的水库,1968年底蓄水发电。原设计汛期限制水位1726米,千年一遇设计洪水位1735米,万年一遇校核洪水位1738米,调洪库容15.2亿立米。由于各种原因,刘家峡水库目前达不到原设计的防洪标准。它的防洪问题,除了采取一定的工程措施以确保泄洪建筑物的安全运用及提高 First, the issue raised Liujiaxia Reservoir is located in the upper reaches of the Yellow River in Yongjing County, Gansu Province, is a comprehensive utilization of reservoirs, by the end of 1968 water storage. The original design of flood control water level of 1726 meters, once in a thousand years the design flood 1735 meters, once a year to verify the flood level of 1738 meters, flood control storage capacity of 1.52 billion cubic meters. Due to various reasons, the Liujiaxia Reservoir can not reach the original designed flood control standard at present. Its flood control issues, in addition to taking certain engineering measures to ensure the safe use of flood discharge buildings and improve