【摘要】 开展城市社区暴雨内涝模拟,初步分析受影响的居民数量。以上海市普陀区金沙居委地区为案例,利用上海市暴雨经验公式计算重现期为50年、100年、500年三种不同情景下的1 h降水量,以修正的SCS模型计算径流量。结合上海市排水管网系统的运行状况和实测的研究区相对高程,模拟9种不同情景下暴雨积水的淹没深度,分析不同情景下受影响的房屋分布和对居民出行的影响。随着暴雨强度的增强,排水管网系统功能的失效,积水区域由研究区中部不断扩大。在重现期为500年的情景下,在排水系统完全失效的情况下,最大淹没深度可达0.405 m,道路积水影响出行的人数达到5 970人,占研究区总人口数的87%,已经严重影响到当地居民的日常生活和出行。更多还原

【Abstract】 A rainstorm waterlogging modeling is conducted and the number of affected residents at urban community is analyzed.A case study of Jinsha Community in Putuo District in Shanghai is done.In the case study,1h precipitation is calculated,by using the empirical formula of Shanghai rainstorm,in case of three scenarios with return periods of 50,100 and 500 years respectively,to revise SCS model to calculate rainstorm runoff.Combining with operation status of the drainage system in Shanghai and observed relative elevation of the target area,9 submergence depth of storm water under different situations are simulated,and distribution of the buildings affected and impact on the residents’ trip in each situation are analyzed.With the increase of rainfall intensity and the failure of the drainage pipe network system,the inundation area expands from the central portion to the whole study area.Under the situation of return period of 500 years and complete failure of the drainage system,the maximum submergence depth could reach 0.405 m,as high as 5970 residents,covering 87% of the total population,are affected by road water in their trips,which has a serious impact on the daily life and trip of the local residents.更多还原