关键词: 防洪效果评估;水动力数学模型;冯铁营引河工程;洪泽湖;淮河;

Abstract: Fengtieying Diversion Project is a crucial project to expand the flood outlet of the Huaihe River and reduce flood disasters in the middle reaches.After the completion of the diversion channel, the flood control situation of the Huaihe River and Hongze Lake requires a comprehensive assessment.Based on the current situation and planning of the flood control engineering system in the section from Bengbu to Hongze Lake, this paper established a hydrodynamic mathematical model coupling1D and 2D and integrating river-lake-storage detention basin.Under the conditions of designed flood and typical flood, the flood control benefit and impacts of the project were objectively evaluated by analyzing the changes of hydrodynamic conditions such as water level, flow and water surface slope.The evaluation result showed that:(1)the project effectively reduced the water level of the mainstream of the Huaihe River, shortened the duration of high water level, and reduced flood disasters in the middle reaches area.(2)The water surface slope of the mainstream of the Huaihe River could be increased, improving the bed-forming capacity of the upstream of Fushan section.(3)Under the effect of sea-entering channel phase Ⅱ project, the influence of diversion project was mainly limited at the Fengchukou section, which could be alleviated and eliminated by optimal operation without increasing flood risk of Hongze Lake.

Key words: evaluation on flood control effect; hydrodynamic mathematical model; Fengtieying Diversion Project; Hongze Lake; Huaihe River;