蒙洼蓄滞洪区洪水淹没数值模拟

蓄滞洪区是我国江河防洪体系中重要的组成部分。蒙洼作为淮河中游一个重要的蓄洪区，在淮河洪水调度中发挥着至关重要的作用。采用二维非恒定流不规则网格模型，模拟蒙洼蓄洪区内洪水淹没过程，分析蓄洪区内洪水风险，并采用2003年淮河大洪水的实测资料，对模型进行验证。结果表明，该模型能较好地模拟蒙洼蓄洪区洪水淹没过程，可用于蒙洼蓄洪区的规划、建设、管理，乃至整个淮河流域的洪水预报。

Numerical modeling of flooding in Mengwa Flood Detention Area

Flood detention areas play a very important role in flood management of our country. The Mengwa Flood Detention Area is loeated at the middle reaches of the Huaihe River, it is one of the most important flood-control facilities in this basin. A 2-D unsteady flow model with irregular grids is applied to simulate flood propagation in the Mengwa Flood Detention Area and is calibrated by using recorded data of flood in 2003. The result shows that the model can simulate flood in the Mengwa Flood Detention Area with a good precision. The flood risk due to inundation is also analyzed in this paper. The result of the simulation will provide reference for the planning, regional development and management of the Mengwa Flood Detention Area, and even for the flood management of the whole Huaihe River basin.