水资源保护2024，Vol.40Issue(3)：61-70,10.DOI:10.3880/j.issn.1004-6933.2024.03.008
2022年长江流域不同类型干旱时空响应关系
Spatiotemporal response relationships between different types of droughts in the Yangtze River Basin in 2022
摘要
Abstract
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.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Key words
megadrought/cluster identification method/drought identification/spatiotemporal response/Yangtze River Basin分类
天文与地球科学引用本文复制引用
董蓉蓉,粟晓玲,屈艳萍,姜田亮,吴海江..2022年长江流域不同类型干旱时空响应关系[J].水资源保护,2024,40(3):61-70,10.基金项目
国家自然科学基金项目(52079111,51879222) （52079111,51879222）
