摘要
利用2010—2021年铜仁396个自动雨量站逐日12 h降水资料,分析铜仁暴雨时空分布特征。得出结论:(1)铜仁市的年平均暴雨日数分布与年降雨大值中心基本一致,主要集中在梵净山区域,各区县地势低洼地带到高山过渡区域最为明显,低洼地带暴雨相对较少。铜仁的暴雨主要集中在5—9月,6月和7月是暴雨高发期,出现暴雨站次最多。(2)每月的暴雨落区分布都不一样,1—2月和11—12月无明显暴雨发生;3—4月暴雨落区分散;5、7月在梵净山东、西两侧,6、8月在梵净山北侧和东侧,9月分布在铜仁市南部,10月在梵净山西侧。而县城区站点暴雨5月集中在松桃;6月出现在碧江、松桃、江口、德江;7月德江、松桃、碧江;8月碧江、万山;9月松桃、江口;10月松桃、石阡。(3)铜仁市暴雨在5、9月白天暴雨特征明显,6—8月白天和夜间暴雨发生频率相当。大暴雨多发生在5—8月,白天出现在6月最多,夜间出现在7月最多。
Based on the daily 12 h precipitation data of 396 automatic rainfall stations in Tongren from 2010 to 2021,the spatial and temporal distribution characteristics of rainstorm in Tongren are analyzed.The results were as follows:(1) The distribution of the annual average rainstorm days in Tongren City was basically consistent with the center of the annual rainfall maximum value,which was mainly concentrated in the Fanjingshan area,as well as the transition area from lowlying areas to high mountains in all districts and counties.The low-lying areas have relatively less rainstorm.The rainstorm in Tongren was mainly concentrated in May to September,of which June and July are the high incidence periods of rainstorm,with the most rainstorm stations.(2) The distribution of rainstorm areas was different every month,and there was no obvious rainstorm in January to February and November to December;Scattered rainstorm falling areas in March and April;5.In July,it was located in the east and west of Fanjing Mountain,in June and August,in the north and east of Fanjingshan,in September,in the south of Tongren City,and in October,in the west of Fanjing Mountain.The rainstorm at the stations in the county and urban areas concentrated in Songtao in May;Appearing in Bijiang,Songtao,Jiangkou,and Dejiang in June;July Dejiang,Songtao,Bijiang;In August,Bijiang and Wanshan;September Songtao and Jiangkou;October Songtao and Shiqian.(3)It was found that the rainstorm in Tongren City was characterized by obvious daytime rainstorm in May and September,and the frequency of daytime and nighttime rainstorm in June August was similar.Heavy rainstorm mostly occurs from May to August,most of which occurs during the day in June and most at night in July.
作者
杨林泉
杨群
Yang Lin-quan(Tongren Bijiang District Meteorological Bureau,Bijiang,Guizhou 445300)
出处
《农业灾害研究》
2023年第8期211-213,226,共4页
Journal of Agricultural Catastrophology
关键词
暴雨
时空分布
特征
Rainstorm
Temporal and spatial distribution
Feature
