为研究蓄滞洪区分洪之后洪水演进情况，以淮河中游濛洼蓄滞洪区为研究对象，采用MIKE21模型对洪水演进过程进行了二维模拟计算。利用2007年实测水位数据对模型参数进行率定后，水位模拟最大相对误差约10%，表明模型具有较高精度。运用该模型模拟计算了最危险分洪方案下蓄滞洪区内任一点的水深、流速、流达时间等洪水淹没要素。研究成果可为濛洼蓄滞洪区防洪救灾提供技术支撑。

In order to study the flood routing situation in the detention basin after flood diversion, MIKE21 was adopted to conduct 2D flood routing simulation of the MengWa detention basin in the midstream of Huaihe River. The measured water level data in 2007 were used to calibrate the model, and the maximum relative error of simulated and measured water levels was about 10%, which indicated that the model has a high simulation precision. The model was used to simulate the inundated elements, such as water depth, flow velocity, and arrival time, at each location of the detention basin under the scheme of the most dangerous flood diversion. . The research results can offer technical support for flood control and disaster reduction of the MengWa detention basin.

国家“十二五”科技支撑计划项目（2013BAB06B01-2）；水利部公益性行业专项经费项目（201301066）