水资源与水工程学报2024，Vol.35Issue(4)：20-28,9.DOI:10.11705/j.issn.1672-643X.2024.04.03
基于日尺度旱涝急转指数的重庆市旱涝急转事件演变特征分析
Evolution of drought-flood abrupt alternation events in Chongqing based on the daily dry-wet abrupt alternation index
摘要
Abstract
Drought-flood abrupt alternation events of 34 meteorological stations in Chongqing City were identified by the daily dry-wet abrupt alternation index(DWAAI),which can accurately reflects the suddenness and alternation of the events.Based on the actual situation of Chongqing City,the range of DWAAI values for drought-flood abrupt alternation events at different levels were determined and the spatiotemporal characteristics of the frequencies of these events were analyzed.The results showed that the drought-flood abrupt alternation events in Chongqing City were predominantly characterized by a transition from drought to flood,accounting for 85％of the total drought-flood abrupt alternation events.These drought-flood events mainly occurred during April-September,and the multi-year average cu-mulative frequency was 22.64 times,with moderate and severe events accounting for 11.7％and 2.9％,respectively.Spatially,drought to flood events occurred frequently in the western,central and northeast-ern regions,with no significant trend in frequency change.Whereas flood to drought events mainly hap-pened from July to September,and the multi-year average cumulative frequency was 5.60 times,with mild and moderate events accounting for 92.9％and 7.1％,respectively.From spatial perspective,flood to drought events were frequent in the southeastern,central and the west part of northeastern regions(such as Kaixian),and the frequencies of the regions listed above generally showed an increasing trend.The research results can provide a theoretical basis for enhancing water security and strengthening drought prevention,flood resistance and disaster reduction in Chongqing and neighboring regions.关键词
旱涝急转事件/日尺度旱涝急转指数/方差校正的Sen趋势检验/时空演变/重庆市Key words
drought-flood abrupt alternation events/daily dry-wet abrupt alternation index/modified Sen's trend test/spatiotemporal variation/Chongqing City分类
天文与地球科学引用本文复制引用
刘玉冰,刘波,王文鹏,邱鹏,黎春蕾,仵新燕,刘缘晴..基于日尺度旱涝急转指数的重庆市旱涝急转事件演变特征分析[J].水资源与水工程学报,2024,35(4):20-28,9.基金项目
国家重点研发计划项目(2021YFB3900601) （2021YFB3900601）
