基于库群联合调度和DEM的区域洪水淹没范围模拟

Simulation of Regional Flood Submergence Based on Multi-reservoirs Joint Operation and DEM

为快速确定与分析水库下游洪水淹没范围,以联合调度模型得到的累积成灾水量为淹没水量,以研究区域的DEM为数据基础,并结合体积法的思想,通过ERDAS模拟黄壁庄水库下游一定水量的无源淹没面积。模拟结果表明,对100年一遇设计洪水,将不产生淹没;对1 000年一遇设计洪水,在累积成灾水量为39.26×108 m3时,相应成灾水量洪水淹没面积为3 926km2,与子牙河系堤防保护区查证资料相符,可见库群联合调度与DEM相结合的方法模拟洪水淹没范围可行、有效。

In order to accurately identify and analyze the flood submergence of the downstream reservoir, taking the accumulated flood capacity to cause disaster as the amount of inundated water, based on the data of DEM and the idea of volumetric method, non source flood＇s areas of given flood volume come from Huangbizhuang were simulated via ERDAS. The results show that tbe once-in a-century flood did not produced submergence by the flood routing; the accumulated flood capacity to cause disaster was 39.26 × 10^8 cubic meters for the once-in-a millennium and the flood submergence areas were 3 926 square kilornetres. And the results conform to the data of Ziya River system of protected areas, It can be seen that combination of multi-reservoir joint operation with DEM can calculate the submerged areas effectively.