极端降雨情景下城市区域积水风险特征研究  

Research on Characteristics of Urban Water-logged Risks under Extreme Rainfall Events

作　　者：孟庆强 朱志华[2,3] 陈晓宏[2,3] 何沛英[2,3] 刘浩 

机构地区：[1]广州市水务科学研究所,广东广州510220 [2]中山大学水资源与环境研究中心,广东广州510275 [3]中山大学华南地区水循环与水安全广东普通高校重点实验室,广东广州510275

出　　处：《水电能源科学》2016年第2期1-5,共5页Water Resources and Power

基　　金：国家自然科学基金项目(51210013;51479216;51379225);国家科技支撑计划项目(2012BAC21B0103);水利部公益项目(201201094;201301002-02;201301071);广州市水务科技项目(GZSWKJXM2012-02)

摘　　要：由于极端降雨事件频发,城市区域内涝问题日益突出。为探究极端降雨情景下区域积水风险特征,以广州市某居住小区为例,构建区域排涝模型,采用投影寻踪技术分析区域内涝风险。结果表明,除积水时数、最大积水速率和积水总量外,所选指标投影分量值均趋近于0;在设计暴雨重现期为5、10、20、50年时,分别有1、3、4、4个节点具有积水风险,其中积水风险最大的节点为J23,其积水风险值约为1.8;随着降雨重现期的增大,区域受雨洪灾害的影响范围和程度亦随之增大。此外,对排水管网系统积水黑点和区域积水风险的定性定量分析,揭示了不同降雨强度下区域积水风险变化特征,对区域雨洪灾害的治理具有一定的指导意义。Urban drainage systems face substantial challenges due to the frequency of extreme precipitation events.To reveal the characteristics of water-logged risk under different rainfall return periods,taking a residential district in Guangzhou as an example,regional flood drainage model was established and projection pursuit method was used to analyze the urban water-logged risk.The results show that the projection direction components of duration of water-logged,the largest water flow and total flood amount were up to 0.4while the other indexes were almost zero;.There were 1,3,4and4 junctions with water-logged risk under the return periods of 5a,10 a,20aand 50 a,respectively.J23 was the junction where water-logged risk was the largest and reached 1.8.The extent and area of inundation increased with the increasing of the rainfall return period.Additionally,the variation of inundation characteristics under different return periods were revealed based on qualitatively and quantitatively analyzing the drainage system and its water-logged risk,which had guiding significance for management of regional storm rain disaster.

关 键 词：排水管网 积水风险 投影寻踪技术 SWMM 

分 类 号：P333[天文地球—水文科学]