城市雨水管网系统脆弱性评价

苏州科技学院环境工程与科学学院,江苏苏州 215011

排水工程; 城市雨水管网; 城市雨水系统安全评价; 层次分析; 评价指标; 评价模型; 脆弱度

Vulnerability assessment of urban storm sewer systems
Long Hao and Li Cuimei

Long Hao and Li CuimeiSchool of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215011, Jiangsu Province, P.R.China

drainage system; urban storm sewer; security assessment of urban storm sewer system; analytic hierarchy process; assessment index; evaluation model; vulnerability degree

DOI: 10.3724/SP.J.1249.2014.06593

备注

分析当前城市雨水系统现状,介绍城市雨水系统脆弱性的概念,对影响城市雨水系统脆弱性的主要因素进行多层次分析,构建了城市雨水系统脆弱性评价模型,结合脆弱度、重现期和积水深度,建立了城市雨水系统脆弱性(安全性)评价体系.以武汉和长沙的雨水系统为例展开应用研究,测得这两座城市雨水系统的脆弱度分别为0.410和0.460,雨水系统脆弱度中等,系统安全性一般,当遇到重现期P≥10年的暴雨时,城市会发生严重内涝.所建立的雨水系统脆弱性评价模型与方法,可用于城市雨水脆弱性评价.

Based on the analysis of the current status of urban rainwater drainage system, the concept of urban rainwater drainage system vulnerability was introduced. The assessment indices of urban rainwater drainage system vulnerability including the vulnerability, return period and waterlogging depth were constructed. An evaluation model of the urban rainwater system vulnerability was put forth through an analytic hierarchy process. The vulnerability degrees of the rainwater drainage systems in Wuhan and Changsha were simulated by means of the proposed evaluation model. The simulation results show that the vulnerability degree values of the rainwater drainage systems in Wuhan and Changsha are 0.410 and 0.460, respectively. These results suggest that the vulnerability degrees of the two cities and the safety level of the rainwater drainage systems are at medium. The two cities would suffer serious waterlogging in storm events with an over 10-year return period. The proposed vulnerability evaluation model and method for urban rainwater system are helpful for the optimization design of urban rainwater drainage system.

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