北京市方庄区域暴雨积水模拟研究

Simulation Study on Rainstorm Waterlogging at Fangzhuang Area in Beijing

随着城市化进程加快,极端暴雨导致城市暴雨内涝灾害频发,构建城市精细化洪涝模型对城市防涝减灾具有重要意义。以北京市方庄区域为例,基于区域内各类基础数据,构建该区域降雨产流、河网汇流、管网汇流及地表漫流等过程的总体洪涝模型,并利用监测点实测数据模拟分析三场短历时的降雨事件。结果表明,由于管网系统收集所有的地表径流,方庄区域无地表积水现象发生,且各监测点曲线变化趋势拟合情况较好,模拟结果与实测数据基本相符。

Urbanization has started to accelerate and extreme rainstorms results in frequent urban storm flooding disasters.Urban refinement flood models are important for urban flood prevention and disaster alleviation.Taking the Fangzhuang area in Beijing for an example,based on the various types of basic data in the region,ageneral flood model for the processes of rainfall runoff,river network confluence,pipe network confluence and overland flow is established,and the three short-duration rainfall events are simulated using actual data of monitoring points.The results show that as the pipe network system collects all data of surface runoff,no surface water accumulation occurs in the Fangzhuang area.Besides,the curve trends of each monitoring point are well fitted,and the simulation results are basically consistent with the actual measured data.