摘要
为划分镇江市降雨场次和分析暴雨特性,基于丹徒站1981—2016年汛期5—10月的逐分钟降雨资料,确定了降雨间隔时间,筛选了暴雨场次,分析了汛期各月暴雨次数和暴雨量的变化特性,解析了不同历时和不同强度暴雨的演变规律。结果表明:镇江市合理的降雨间隔时间为2 h;汛期总暴雨次数呈略微上升的趋势,总暴雨量以每10年43.4 mm的速度增加;汛期暴雨主要集中在6—8月,其暴雨次数占汛期总暴雨次数的73.0%,其暴雨量占汛期总暴雨量的73.5%;7月和8月的暴雨量及其对总降雨的贡献率呈增加趋势,其他月份呈减少趋势,暴雨集中度增强;不同历时的暴雨中,一般暴雨占比最大,特短、短暴雨次数增长趋势显著,且特短暴雨的强度呈增加趋势;不同强度的暴雨中,弱暴雨占比最大,中、强暴雨次数均有不同程度的增长。
In order to divide rainfall events and analyse rainstorm characteristics in Zhenjiang City,based on the minute rainfall data of Dantu Station from May to October in flood season from 1981 to 2016,the rainfall interval time was determined,the rainstorm frequency and rainstorm quantity variation characteristics of each month in flood season were analyzed,and the evolution law of rainstorm with different duration and intensity was analyzed.The results show that the reasonable rainfall interval of Zhenjiang City is 2 h.The total number of rainstorms in flood season showed a slight upward trend,and the total storm rainfall increased at the speed of 43.4 mm every 10 years.The rainstorm in flood season was mainly concentrated in June to August,and the rainstorm frequency accounts for 73.0%of the total rainstorm frequency in the flood season,and the rainstorm amount accounted for 73.5%of the total storm rainfall in the flood season.In July and August,the rainstorm and its contribution rate to the total rainfall showed an increasing trend,while in other months it showed a decreasing trend,and the rainstorm concentration increased.Among the rainstorms with different durations,the general rainstorm accounted for the largest proportion,and the number of extreme short and short rainstorms increased significantly,and the intensity of extreme short rainstorms showed an increasing trend.Among the rainstorms with different intensities,the weak rainstorm accounted for the largest proportion,and the number of moderate and heavy rainstorms increased in different degrees.
作者
皋云
李琼芳
周正模
杜尧
和鹏飞
GAO Yun;LI Qiongfang;ZHOU Zhengmo;DU Yao;HE Pengfei(College of Hydrology and Water Resources,Hohai University,Nanjing 210098,China;Jiangsu Provincial Collaborative Innovation Center of World Water Valley and Water Ecological Civilization,Nanjing 210098,China)
出处
《水资源保护》
CAS
CSCD
北大核心
2021年第3期43-49,共7页
Water Resources Protection
基金
国家自然科学基金面上项目(51879069)。
关键词
暴雨特性
降雨场次划分
暴雨历时
暴雨强度
镇江市
rainstorm characteristics
division of rainfall events
rainstorm duration
rainstorm intensify
Zhenjiang City
