暴雨内涝灾害模拟研究

Simulation study of rainstorm water logging disaster

城市暴雨内涝灾害的频发,已经给城市居民生命、财产安全等造成了严重威胁。对城市暴雨内涝灾害危险性模拟,可为城市暴雨内涝灾害危险性预报预警提供依据。以长春市南关区为研究区,以城市暴雨内涝灾害为研究对象,从多情景视角出发,提出了城市暴雨内涝灾害危险性多情景模拟框架,并以一、二维非恒定流为控制方程,以不规则网格为骨架综合构建了城市暴雨内涝灾害危险性数值模拟模型,实现研究区暴雨内涝灾害危险性多情景模拟。研究结果可为城市内涝应急管理部门在内涝灾害预报预警上提供参考依据。

Frequent occurrence of urban rainstorm waterlogging has caused serious threats to the lives and property security of urban residents.Simulation of hazard risk of urban rainstorm waterlogging can be used to provide a basis for forcasting and warning of the urban rainstorm waterlogging risk.An investigation based on the urban rainstorm waterlogging in the Nanguan district of Changchun has been conducted.From a multiscene perspective,the paper puts forward a scenario simulation framework for urban rainstorm waterlogging risk.One and two dimensional non-constant flows are used for the governing equation.A numerical model of urban rainstorm disaster risk is constructed by means of irregular grid to realize simulation of the risk of flooding hazards in the studied area.The results can provide a reference for the urban waterlogging emergency management department.