1954年型洪水淮河中游防洪工程联合调度研究

建立了淮河中游洪河口至浮山段一、二维耦合水动力数学模型,采用实测洪水过程对模型进行验证,验证结果表明,模型具有较高的精度.基于水动力数学模型,在现状工况条件下,对1954年型洪水进行了调度模拟分析,研究了临淮岗洪水控制工程、行蓄洪区与分洪河道等防洪工程联合调度运用效果.计算结果表明,对于1954年型洪水,淮河干流行蓄洪区全部启用,不启用临淮岗工程,蚌埠以上大部分河段水位超保证水位,蚌埠以下河段水位低于保证水位.启用临淮岗工程,可以减轻下游的防洪压力,减少行洪区启用数量,减少行蓄洪区淹没面积,同时也增加了上游蓄洪区和部分河段的淹没水深和高水位历时.综合全河段分析,启用临淮岗工程,干流大部分河段水位较低,行蓄洪区淹没面积减少,防洪效果较优.

Simulation of combined management of flood controlin the middle reach of Huai River for 1954 flood

A two-dimensional hydrodynamic coupling mathematical model MIKE was used to study the 1954 flood control,at the Middle Reach of Huai River (MRHR).The domain is from Honghekou to Fushan section along the MRHR.It is found that the model has a high agreement with flood in 1954.The flood control pro ject,flood plain and flood channel were simulated.It is found that for the 1954 flood,by using flood plain only,the water table in the upstream of Bengbu Station is above safe water level.In the downstream of Bengbu Station,the water is below safe water level.By using flood control projects,the flood plain can be less used along the MRHR.Therefore,the flood control project can reduce the downstream flood control risk,while also increase the flood storage area upstream.Comprehensive analysis of the reach shows that the flood control project can effectively reduce the flood plain area.