贺州市暴雨变化特征及降水极值重现期研究  

Study on the variation characteristics of rainstorms and the return period of precipitation extremes in Hezhou City

作　　者：韦小雪 欧阳家萌 黄远盼 李芷霓 潘春江 WEI Xiaoxue;OUYANG Jiameng;HUANG Yuanpan;LI Zhini;PAN Chunjiang(Hezhou Meteorological Bureau,Guangxi Hezhou 542899,China)

机构地区：[1]贺州市气象局,广西贺州市542899

出　　处：《气象研究与应用》2024年第3期69-73,共5页Journal of Meteorological Research and Application

基　　金：广西气象科研计划创新平台专项(BNCO-N202303);广西气象科研计划项目(桂气科2023M11);2022年贺州市科技局科技创新能力与条件建设项目(贺科技202298)。

摘　　要：利用贺州市132个气象站点逐日降雨量资料,通过ArcGIS和MuDFiT分析贺州市暴雨时空变化特征和不同重现期降雨极值的分布特征。结果表明:(1)贺州市年平均暴雨日数和年平均大暴雨日数大值区分布与迎风坡、水汽充足处相对应。(2)昭平的暴雨日数和大暴雨日数均为贺州市各县中最多,在5月和6月相对较多。(3)昭平100年一遇1日降雨量为315.6 mm,富川为257.5 mm,钟山为228.2 mm,贺州为248.1 mm。贺州市1日降雨量的最优函数为Gen.Extreme Value。Based on the daily rainfall data from 132 stations in Hezhou City,the spatial and temporal characteristics of rainstorms and the distribution of rainfall extremes in different return periods were analysed by ArcGIS and MuDFiT.The results show that:(1)the distribution of the maximum value area of average annual number of rainstorm days and the average annual number of heavy precipitation days in Hezhou corresponds well to the windward slope and the place with sufficient water vapor.(2)The number of rainstorm days and heavy precipitation days in Zhaoping are higher than the other counties of Hezhou City,with relatively more days in May and June.(3)By fitting,the daily rainfall for the 100-year return period under the optimal function is found to be 315.6 mm in Zhaoping,257.5 mm in Fuchuan,228.2 mm in Zhongshan,and 248.1 mm in Hezhou,with its optimal function being Gen.Extreme Value.

关 键 词：暴雨特征 重现期 最优函数 

分 类 号：P426.6[天文地球—大气科学及气象学]