摘要
为研究2022年长江流域不同类型干旱的时空响应关系,基于三维时空聚类识别方法在月尺度下提取2022年长江流域气象、农业和水文干旱事件,在候尺度(5 d)下利用三类型干旱事件对匹配规则识别2022年长江流域存在时空联系的气象农业水文干旱事件对,定量揭示各类型干旱之间的时空响应关系。结果表明:三维时空聚类识别方法在月尺度下识别出历时大于2月的气象、农业和水文干旱事件分别为3、2和2场,能够清晰地刻画出各类型干旱在时空上的发生、发展、消亡过程;利用三类型干旱事件对匹配规则在候尺度下识别出2022年长江流域1场气象农业水文干旱事件对,即由气象和农业干旱事件共同引发的水文干旱事件,该场干旱事件对中各类型干旱事件迁移路径均为长江上游至中下游迁移,最终分别在湖北,重庆和湖北结束。
To study the spatiotemporal response of different types of droughts in the Yangtze River Basin in 2022,a three-dimensional spatiotemporal cluster identification method was used to extract meteorological drought,agricultural drought,and hydrological drought events on monthly scale in 2022,and the matching rule for three types of drought events was employed to identify the meteorological-agricultural-hydrological drought event pair with spatiotemporal connections on pentad scale(i.e.,five-day)in 2022,so as to quantitatively reveal the spatiotemporal response characteristics among various drought types in the Yangtze River Basin.The results indicated that three meteorological drought events,two agricultural drought events,and two hydrological drought events lasting longer than two months were extracted on monthly scale in the Yangtze River Basin in 2022,and the three-dimensional spatiotemporal cluster identification method can clearly depict the occurrence,development,and extinction processes of various drought types in time and space.Furthermore,a meteorological-agricultural-hydrological drought event pair,in which a hydrological drought event that was jointly triggered by meteorological drought and agricultural drought events in 2022,was identified based on the matching rule.The migration paths of the three drought types were all from the upper reaches toward the middle and lower reaches,and finally terminated in Hubei,Chongqing,and Hubei,respectively.
作者
董蓉蓉
粟晓玲
屈艳萍
姜田亮
吴海江
DONG Rongrong;SU Xiaoling;QU Yanping;JIANG Tianliang;WU Haijiang(Key Laboratory for Agricultural Soil and Water Engineering in Arid Area of Ministry of Education,Northwest A&F University,Yangling 712100,China;College of Water Resources and Architectural Engineering,Northwest A&F University,Yangling 712100,China;Research Center on Flood&drought Disaster Prevention and Reduction,China Institute of Water Resources and Hydropower Research,Beijing 100038,China;Research Center on Flood and Drought Disaster Reduction of Ministry of Water Resources,Beijing 100038,China)
出处
《水资源保护》
EI
CAS
CSCD
北大核心
2024年第3期61-70,共10页
Water Resources Protection
基金
国家自然科学基金项目(52079111,51879222)。
关键词
特大干旱
聚类识别方法
干旱识别
时空响应
长江流域
megadrought
cluster identification method
drought identification
spatiotemporal response
Yangtze River Basin
