摘要
【目的】研究信阳市近30年短历时暴雨雨型特征,为防灾减灾、服务地方提供技术支撑。【方法】运用信阳国家气象站1991—2020年逐分钟雨量资料,通过模糊识别法确定了60 min、120 min和180 min历时暴雨雨型,并通过计算雨峰系数总结出雨峰分布规律。【结果】(1)不同历时暴雨中雨型Ⅲ出现概率大,占比为33.6%~36.5%。(2)在不同年代中,历时60 min和120 min暴雨雨型均以雨型Ⅲ为主,而180 min暴雨雨型在2000s以雨型I为主。(3)信阳市短历时强降雨量较为集中,各历时暴雨雨峰均位于降雨过程1/2偏前位置。【结论】信阳市区短历时暴雨雨型的主要特征为“单峰型、速度快、强度高、尾巴长”,在工程设计中需重视单峰雨型雨峰前置引发的城市内涝风险。
[Purposes]To study the characteristics of the short duration rainstorm rainfall pattern in Xinyang City in the past 30 years and provide technical support for disaster prevention and mitigation and local service.[Methods]Based on the minute rainfall data of Xinyang National Meteorological Station from 1991 to 2020,the rain patterns of 60 min,120 min and 180 min rainstorm are determined by fuzzy recognition method.In addition,the distribution rules of rain peaks are summarized by calculating the rain peak coefficient.[Findings]①The occurrence probability of moderate rain typeⅢin heavy rains with different durations is high,accounting for 33.6%~36.5%.②In different years,the 60 min and 120 min torrential rain types were dominated by rain typeⅢ,while the 180-min torrential rain types were dominated by rain type I in 2000s.③The short duration strong rainfall in Xinyang City is concentrated,and the rainstorm peaks are located in 1/2 of the rainfall process.[Conclusions]The main characteristics of the short duration rainstorm pattern in Xinyang urban area are"single peak pattern,fast speed,high intensity and long tail".In engineering design,attention should be paid to the urban waterlogging risk caused by the front of single peak pattern.
作者
黄冬凌
HUANG Dongling(Xinyang Key Laboratory of Tea Meteorology,Xinyang 464000,China;Xinyang Meteorological Burea,Xinyang 464000,China)
出处
《河南科技》
2023年第12期106-109,共4页
Henan Science and Technology
关键词
短历时暴雨
模糊识别法
信阳市
雨型特征
short-duration rainstorm
fuzzy identification method
Xinyang City
rainfall pattern charac⁃teristics
