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成丹, 陈翠珍, 陈正洪, 刘静, 方怡. 2020: 武汉市暴雨的雨峰和历时及其排水防涝的分析. 暴雨灾害, 39(5): 532-538. DOI: 10.3969/j.issn.1004-9045.2020.05.012
引用本文: 成丹, 陈翠珍, 陈正洪, 刘静, 方怡. 2020: 武汉市暴雨的雨峰和历时及其排水防涝的分析. 暴雨灾害, 39(5): 532-538. DOI: 10.3969/j.issn.1004-9045.2020.05.012
CHENG Dan, CHEN Cuizhen, CHEN Zhenghong, LIU Jing, FANG Yi. 2020: Analysis of rainfall peak and duration of rainstorm for drainage and waterlogging prevention in Wuhan. Torrential Rain and Disasters, 39(5): 532-538. DOI: 10.3969/j.issn.1004-9045.2020.05.012
Citation: CHENG Dan, CHEN Cuizhen, CHEN Zhenghong, LIU Jing, FANG Yi. 2020: Analysis of rainfall peak and duration of rainstorm for drainage and waterlogging prevention in Wuhan. Torrential Rain and Disasters, 39(5): 532-538. DOI: 10.3969/j.issn.1004-9045.2020.05.012

武汉市暴雨的雨峰和历时及其排水防涝的分析

Analysis of rainfall peak and duration of rainstorm for drainage and waterlogging prevention in Wuhan

  • 摘要: 基于1980—2018年武汉国家基本气象观测站逐分钟降雨数据,分别利用同频率分析法和Huff雨型分析法确定武汉主城区历时1 440 min设计暴雨雨型,并采用InfoWorks ICM水力模型软件对雨水管网进行模拟计算,分析两种设计暴雨雨型的雨峰、降雨量时间分布和积水情况,研究结果表明:(1)基于同频率分析法和Huff雨型分析法确定的武汉主城区历时1 440 min设计暴雨雨型均为单峰型,两者雨峰位置均略微超前整场降雨过程的前2/3分位,在降雨时程的60%~70%阶段,前者降雨强度迅速增加,大于后者。(2)在同频率分析法确定的武汉主城区历时1 440 min设计暴雨雨型下,武汉汉口中心城区的淹没面积均大于Huff雨型分析法的确定结果,且水深、流量、流速等峰值均较大。(3)同频率分析法确定的设计暴雨雨型结果使得武汉主城区系统内达标管网比例更低,积水情况更严重。

     

    Abstract: In this study, the minute-level rainfall data at Wuhan National Basic Meteorological Observing Stations from 1980 to 2018 are used to ascertain the design storm hyetograph of 1 440 min for the main urban area of Wuhan by the homogenous frequency analysis method and the Huff hyetograph analysis method, respectively. The results about rain peak, time distribution of rainfall and ponding water in the calculation and simulation of rainwater pipe network by hydraulic model software named InfoWorks ICM will be discussed. Results show that: (1) The design storm hyetographs of 1 440 min for the main urban area of Wuhan present single-peak pattern uniformly on the base of the homogenous frequency analysis method and the Huff hyetograph analysis method. Both rain peak positions are slightly ahead of the top 2/3 quintile of the entire rainfall event, while in the stage of 60% to 70%, the rainfall intensity of the former increases rapidly, which is greater than the latter. (2) Under the design storm hyetograph of 1 440 min for the main urban area of Wuhan by the homogenous frequency analysis method, the submerged area of the main urban area of Hankou is larger than that by the Huff hyetograph analysis method, so are the peak values of water depth, flow and velocity. (3) For the main urban area of Wuhan, the proportion of standard pipe network in the system is lower and the water accumulation is more serious when under the design storm hyetograph by the homogenous frequency analysis method.

     

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