宿鸭湖水库位于汝河中游,是亚洲最大的人工湖,在淮河流域防汛中起着重要作用。该水库是以防洪为主,兼有灌溉、养殖、发电和生态保护等多种功能的大型水利枢纽。水库控制流域面积4498 km2,上游为山丘区(占20%),中、下游为平原(占80%),流域呈扇形分布;上游暴雨频繁,曾是“75.8”特大暴雨中心之一。文章主要根据该流域内的工程情况、暴雨洪水特性、洪水预报及洪涝灾害预警等,定量预报出各级洪水对水库库区和下游的影响。 Suya Lake Reservoir is located in the middle reaches of the Ru River, which is the largest artificial lake in Asia and plays an important role in flood control in the Huaihe River Basin. The reservoir is mainly flood control, both irrigation, breeding, power generation and ecological protection and other large-scale water conservancy hub. The area of ​​reservoir control basin is 4498 km2, the upper reaches is the hilly area (20%), the middle and lower reaches are plains (80%), and the drainage area is fan-shaped. The upper reaches have heavy rainfalls and were once one of the centers of “75.8” heavy rainfall . The article quantitatively predicts the impact of floods at all levels on the reservoir area and the lower reaches based on the engineering conditions, storm flood characteristics, flood forecast and flood warning in the basin.