武汉汤逊湖水系遭遇超长历时暴雨的内涝风险分析  

Analysis on Waterlogging Risk of Tangxun Lake Water System under Superlong Duration Rainstorm in Wuhan City

作　　者：肖君健 高艳 万帆 罗强[2] 罗文兵[3] XIAO Jun-jian;GAO Yan;WAN Fan;LUO Qiang;LUO Wen-bing(Wuhan Planning and Design Co.Ltd.,Wuhan 430014,China;State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,China;Changjiang River Scientific Research Institute,Changjiang Water Resources Commission,Wuhan 430010,China)

机构地区：[1]武汉市规划设计有限公司,湖北武汉430014 [2]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072 [3]长江水利委员会长江科学院,湖北武汉430010

出　　处：《中国给水排水》2020年第13期89-95,共7页China Water & Wastewater

基　　金：国家自然科学基金青年科学基金资助项目(51509010)。

摘　　要：设计城市内涝防治设施时,根据设施的服务面积,一般采用3~24 h长历时设计降雨。武汉市地处平原湖区,雨水系统汇水面积大,遭遇超长历时(1~7 d)连续暴雨时,由于湖泊调蓄容量难以及时腾空,易发生系统性内涝灾害,3~24 h长历时降雨已无法满足排水设施的设计需求。为此,以武汉市汤逊湖水系为例,研究了武汉市超长历时暴雨的特征及其发生频率,并通过构建的汤逊湖水系水动力模型,系统分析了汤逊湖水系遭遇超长历时暴雨的内涝风险。结果表明,汤逊湖水系的排涝安全应校核超长历时暴雨的内涝风险;在50年一遇设计重现期下,汤逊湖水系采用2 d设计降雨更为安全。When designing urban waterlogging prevention and control facilities,the rainfall duration is determined according to the service area of the facility,and 3-24 h long duration rainfall is usually adopted.Wuhan is located in a plain lake area,and its rainwater system has a large catchment area.When encountering a continuous heavy rain(1-7 d),the lake which hasn’t enough time to vacate the storage capacity may suffer systematic waterlogging disaster.Therefore,3-24 h long duration rainfall is unable to meet the design needs of drainage facilities.Taking the Tangxun Lake water system as an example,the characteristics and frequency of the heavy rain(1-7 d)in Wuhan were explored and the waterlogging risk caused by long-term torrential rain was systematically analyzed through constructing hydrodynamic model of Tangxun Lake water system.The waterlogging risk during the long-term torrential rain should be checked to insure the drainage safety of the Tangxun Lake water system,and it was safer to use 2-day design rainfall to design the Tangxun Lake water system with return period of 50 years.

关 键 词：超长历时暴雨 内涝风险 排涝标准 水力模型 汤逊湖水系 

分 类 号：TU992[建筑科学—市政工程]