This article describes a new method of urban pluvial flood modeling by coupling the 1D storm water management model (SWMM) and the 2D flood inundation model (ECNU Flood-Urban). The SWMM modeling results (the overflow of the manholes) are used as the input boundary condition of the ECNU Flood-Urban model to simulate the rainfall–runoff processes in an urban environment. The analysis is applied to the central business district of East Nanjing Road in downtown Shanghai, considering 5-, 10-, 20-, 50-, and 100-year return period rainfall scenarios. The results show that node overflow, water depth, and inundation area increase proportionately with the growing return periods. Water depths are mostly predicted to be shallow and surface flows generally occur in the urban road network due to its low-lying nature. The simulation result of the coupled model proves to be reliable and suggests that urban surface water flooding could be accurately simulated by using this methodology. Adaptation measures (upgrading of the urban drainage system) can then be targeted at specific locations with significant overflow and flooding.

中文翻译：

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将雨水管理模型链接到用于城市雨洪建模的新型二维模型

本文通过将一维雨水管理模型（SWMM）与二维洪水淹没模型（ECNU Flood-Urban）结合起来，描述了一种新的城市雨洪建模方法。SWMM建模结果（人孔的溢出）被用作ECNU洪水-城市模型的输入边界条件，以模拟城市环境中的降雨-径流过程。考虑到5年，10年，20年，50年和100年的回归期降雨情景，该分析适用于上海市中心的南京东路中央商务区。结果表明，节点溢流，水深和淹没面积随返回期的增加成比例增加。据预测，由于其地势低洼，水深较浅，一般在城市道路网中发生地表水流。耦合模型的仿真结果证明是可靠的，并表明使用该方法可以准确地模拟城市地表水泛滥。然后，可以将针对性措施（城市排水系统的升级）针对特定的地点，以防止发生大量溢洪和洪水。