水资源保护2024，Vol.40Issue(1)：44-51,8.DOI:10.3880/j.issn.1004-6933.2024.01.006
基于SPI-RRV指数中国气象干旱及其风险时空演变特征研究
Study on spatio-temporal evolution characteristics of meteorological drought and its risk in China based on SPI-RRV index
摘要
Abstract
To fully reveal multi-dimensional meteorological drought characteristics in China under changing environment,an SPI-RRV index-based drought risk assessment method was put forward by coupling the meteorological drought index(SPI)and the reliability-resilience-vulnerability(RRV)index to assess spatio-temporal evolution characteristics of meteorological drought and the drought risk in China.The results show that the SPI-RRV index has characteristics of high stability and strong spatio-temporal comparability,and can accurately assess spatio-temporal evolution characteristics of meteorological drought risk.The average drought grid ratio,proportion of drought months,and number of drought events in southem China are larger than those in northem China.Droughts in humid and semi-humid regions have higher intensity and shorter durations,while droughts in semi-arid and arid regions have lower intensity and longer durations.The transfer of high drought risk areas has a significant interdecadal variation pattern,with a transferring trend from northwest to southwest.关键词
气象干旱/标准化降水指数/可靠性-回弹性-脆弱性指数/干旱风险Key words
meteorological drought/standardized precipitation index/reliability-resilience-vulnerability index/drought risk分类
天文与地球科学引用本文复制引用
杨肖丽,罗定,叶周兵,谢灵枫,任立良,江善虎,袁山水..基于SPI-RRV指数中国气象干旱及其风险时空演变特征研究[J].水资源保护,2024,40(1):44-51,8.基金项目
国家自然科学基金项目(U2243203) （U2243203）
国家自然科学基金面上项目(52079036) （52079036）
