近62年赣江流域汛期暴雨中心时空特征研究  

Spatiotemporal characteristics of rainstorm centers during flood season in Ganjiang Basin during recent 62 years

作　　者：刘惠英[1] 李益朋 徐胜攀 陈新如 LIU Huiying;LI Yipeng;XU Shengpan;CHEN Xinru(School of Hydraulic Engineering,Nanchang Institute of Technology,Nanchang 330099,China)

机构地区：[1]南昌工程学院水利工程学院,江西南昌330099

出　　处：《南昌工程学院学报》2025年第1期14-20,共7页Journal of Nanchang Institute of Technology

基　　金：南昌工程学院博士科研启动项目(2023kyqd004);国家自然科学基金资助项目(41761058)。

摘　　要：利用赣江流域36个雨量站1957—2018年的降雨资料,提取其汛期4~9月的暴雨数据,运用线性趋势、Mann-Kendall趋势检验、Morlet小波分析、IDW插值等方法研究了赣江流域汛期暴雨中心的时空特征。结果表明:在迁移特征上,暴雨中心整体以4.57 km/10a的速率向东迁移,以4.03 km/10a的速率向北迁移,暴雨中心在东西方向与南北方向迁移的第一主周期均为34 a;在雨量特征上,暴雨中心点的多年暴雨量为617.90 mm,年暴雨量以3.7 mm/10a的速率增加,暴雨中心区域的多年暴雨量为582.97 mm,年暴雨量以3.8 mm/10a的速率增加,暴雨中心点和暴雨中心区域的暴雨量第一主周期也均为34 a;在空间特征上,暴雨中心分布较广,在流域上中下游均有分布,在流域下游形成的次数最多、上游次之、中游最少,主要集中出现在上游东北部、中游东北部、下游东北部、下游东部、下游西北部等5个区域。In order to study the temporal and spatial characteristics of rainstorm center in Ganjiang Basin in flood season,the rainfall data from 36 rainfall stations in Ganjiang Basin during 1957—2018 were extracted from April to September in flood season,and the linear trend,Mann-Kendall trend test,Morlet wavelet analysis,IDW interpolation and other methods were used in the study.The results show that the rainstorm center has formed in the flood season of Ganjiang Basin every year during recent 62 years,and its temporal and spatial characteristics are as follows:In terms of migration characteristics,the rainstorm center migrated eastward at a rate of 4.57 km/10a and northward at a rate of 4.03 km/10a,and the first main cycle of the rainstorm center migrated in both east-west and north-south directions was 34 years.In terms of rainfall characteristics,the annual rainstorm volume at the rainstorm center was 617.90 mm,and the annual rainstorm volume increased at a rate of 3.7 mm/10a.The annual rainstorm volume at the rainstorm center area was 582.97 mm,and the annual rainstorm volume increased at a rate of 3.8 mm/10a.The first main cycle of the rainstorm volume at the rainstorm center and the rainstorm center area was 34 a.In terms of spatial characteristics,the rainstorm centers are widely distributed in the upper,middle and lower reaches of the basin.The rainstorm centers are the most frequent in the lower reaches,followed by the upper reaches,and the least in the middle reaches.The rainstorm centers mainly occur in the northeast of the upper reaches,the northeast of the middle reaches,the northeast of the lower reaches,the east of the lower reaches and the northwest of the lower reaches.

关 键 词：赣江流域 暴雨中心 时间特征 空间特征 

分 类 号：X43[环境科学与工程—灾害防治]