近年来，淮河流域洪灾频发，情势越发严峻，时刻威胁淮河流域人民的生命财产安全，而蓄滞洪区调蓄作用对洪水演进有重要控制作用，故研究蓄滞洪区对淮河干流防洪影响尤为必要。本文采用水动力学方法对淮河干流蚌埠至花园咀段进行水流演算，构建河网水流的数学模拟模型。在建模的基础上，用其模拟淮河水流变化规律，并与实测水文资料进行对比，结果表明，模拟计算曲线与实测曲线相对一致，该模型具有适用性。同时，以花园湖蓄滞洪区为例，应用模型分析加入蓄滞洪区调蓄作用后蓄滞洪区几个重要参数对其干流防洪的影响，可实现对洪水演进过程影响的数值模拟，为淮河干流防汛调度工作提供充足的资料和可靠的技术支持。

In recent years, the issue of the flood disaster into Huaihe river is becoming increasingly serious, which threatens the safety of the lives and property of people. However, flood retarding basin has important control over the evolution of flood water, so the research on influence of flood retarding basin on flood control is particularly important. In this paper, the hydrodynamics method is adopted to calculus the conflux of the motion of flow in the mainstream of Huaihe River to build a numerical water flow model. The model is applied to simulate and calculate the motion of water flow. Compared with the measured data, the results show that the tally of computation and observation is in a good agreement. The model can be applied in production practice via appropriate improvement. Meanwhile, this paper takes Huayuanhu flood storage area as an example to study the influence of some factors that play relatively important roles in the example of case. The flow calculation model can forecast and analyze future historical flood , which provides us with reliable data and technical support to control the disaster of flood.