基于InfoWorks ICM模型的城市暴雨内涝模拟

为解决城市暴雨内涝灾害问题,以海口市主城区为例,构建了基于InfoWorks ICM的城市综合流域排水模型,选用3场实测暴雨进行模拟分析,发现该模型具有良好的精度和可靠性。在此基础上,利用该模型对1、2、5、10、20年五种不同设计重现期的暴雨情景下研究区域排水管网系统的排水能力和积水深度进行模拟。结果表明,该模型能较好地评估研究区域的排水能力,且随设计暴雨重现期增加,研究区域的积水深度亦呈现出增加趋势,内涝灾害明显加重。

Simulation of Rainstorm Water Logging in Urban Area Based on InfoWorks ICM Model

In order to solve the problem of urban water logging disaster, an integrated urban Infoworks ICM drainage model for the main zone of Haikou City was set up. The model was verified by three measured rainfall records, and the results show that it has good precision and feasibility. The drainage capacity of the drainage system and water logging depth were simulated by five rainstorms with different design return period (1a, 2a, 5a, 10a, 20a). It has been proved that the model has a good assessment of drainage capacity in this area. With the increasing of return period of the design rainfall, water logging depth appears upward trend and the rainstorm water logging disaster is greatly aggravated.