城市暴雨下的排水系统脆弱性分析:以积水指数为指标  

Vulnerability analysis of urban drainage system under rainstorm:taking water accumulation index as an indicator

作　　者：傅春[1] 黄金燕 李帆[1] 刘业忠 陈毓迪 FU Chun;HUANG Jinyan;LI Fan;LIU Yezhong;CHEN Yudi(School of Architectural Engineering,Nanchang University,Nanchang 330031,China;School of Resource and Environment,Nanchang University,Nanchang 330031,China)

机构地区：[1]南昌大学工程建设学院,江西南昌330031 [2]南昌大学资源与环境学院,江西南昌330031

出　　处：《武汉大学学报（工学版）》2023年第8期942-951,共10页Engineering Journal of Wuhan University

基　　金：国家社科基金年度项目(编号:18BGL187);江西省自然科学基金项目(编号:20181BAB206046);江西社科规划项目(编号:18GL34)。

摘　　要：采用MIKE FLOOD模型研究分析了深圳市龙岗区中心城区在遭遇暴雨干扰时的脆弱性。通过一场降雨过程中的7处严重内涝点的实测积水深度对模型进行率定和验证,得出模型在研究区域具有良好的适应性和较高的可信度。通过模拟1、3、5、10、20 a重现期2 h设计降雨和10 a一遇2 h设计降雨后的36 h恢复期,得到各个时刻的内涝积水量,通过计算每一个时刻的积水指数来评价排水系统的脆弱性。得出如下结论:1)在2 h的设计降雨中,重现期越大,积水指数越高,排水系统越脆弱;2)在36 h的恢复期内,降雨后的前12 h恢复时间是排水系统降低脆弱性的最佳时期,随着恢复时间的延长,积水指数的下降幅度逐渐减小,系统的脆弱性无法完全消除。This paper uses the MIKE FLOOD model to study and analyze the vulnerability of the central urban area of Longgang District of Shenzhen when it encounters heavy rain disturbance.The model is calibrated and verified by measuring the depth of the accumulated water at seven severely waterlogged points during a rainfall process.The results show that the model has good adaptability and high credibility in the study area.By simulating the 2 h design rainfall of 1 a,3 a,5 a,10 a and 20 a return periods and the 36 h recovery period after the 2 h design rainfall of 10 a return period,the waterlogging volume at each moment is obtained,and the water accumulation index at each moment is calculated to evaluate the drainage system vulnerability.The results are as follows:1)In the 2 h design rainfall,the larger the return period is,the higher the water accumulation index is,and the more vulnerable the drainage system is.2)During the 36 h recovery period,the first 12 h recovery time after rainfall is the best period to reduce the vulnerability of the drainage system.With the extension of the recovery time,the decline of the water accumulation index gradually decreases,and the vulnerability of the drainage system cannot be completely eliminated.

关 键 词：MIKE FLOOD模型 城市内涝 排水系统脆弱性 积水量 积水指数 

分 类 号：TV125[水利工程—水文学及水资源]