暴雨洪水管理模型的城市内涝淹没模拟

为解决暴雨洪水管理模型(storm water management model,SWMM)无法模拟城市地表淹没过程的问题,提出一种改进SWMM的内涝灾害模拟方法.该方法通过改进SWMM模型的构建方式,将城市地表数字高程模型(digital elevation model,DEM)数据概化为水池并输入到模型中进行模拟,使得溢流水体可以沿着水池底部地形流动,并依据模拟结果和DEM数据计算出城市地表的淹没过程.通过实例对此方法进行了验证.研究结果表明:通过本文方法可以利用SWMM模拟出城市地表的淹没深度和淹没范围,实现了内涝灾害模拟,为城市内涝防治研究提供了参考依据.

Simulation Investigation of Urban Waterlogging Submergence on Storm Water Management Model

To solve the problem of SWMM ( storm water management model) that flooding process cannot be simulated on city surface, a method of urban flooding simulation by developing SWMM was presented in this paper. The DEM ( digital elevation model) data of city as the storage in the model was generalized and the model was operated through modifying the model construction. And the flooding water flowed through the topography of storage bottom. The flooding process on the surface was calculated depend on the model result and DEM data. The method was verified by a case study. Results prove that SWMM can be used to simulate the flooding depth and flooding area on the surface. The urban flooding simulation was achieved. A reference for the research of urban flooding prevention was provided.