人民长江2026，Vol.57Issue(4)：91-100,10.DOI:10.16232/j.cnki.1001-4179.2026.04.011
基于CHIRPS与SPEI数据集的云南省干旱监测研究
Drought monitoring in Yunnan Province based on CHIRPS and SPEI datasets
摘要
Abstract
Yunnan Province is located in the marginal zone of the monsoon region,where droughts have been occurring frequent-ly in recent years and have shown pronounced spatiotemporal heterogeneity under the combined influences of climate change and complex topography.To accurately characterize regional drought dynamics and enhance drought disaster preparedness,we conduc-ted a quantitative drought monitoring analysis based on high-resolution spatiotemporal data.Using CHIRPS satellite precipitation data and the Standardized Precipitation Evapotranspiration Index(SPEI)for the period2000～2022,we applied the Theil-Sen median trend estimator and the Mann-Kendall test to systematically examine trends in precipitation,drought frequency,drought duration,and spatial distribution characteristics at the prefecture-level city scale across Yunnan Province.The results indicated that southeastern,central,and northwestern Yunnan experienced relatively high drought frequency during 2000～2022,with a sta-tistically significant intensifying trend,the cumulative number of drought events exceeding 15 in these regions.In southeastern Yunnan,the longest drought duration occurred in 2019,lasting up to 8 months,with a minimum SPEI value of-1.8,indicating substantial drought severity.A significant association was identified between decreasing precipitation and increasing drought fre-quency,with particularly pronounced impacts in Kunming,Yuxi,Honghe Prefecture and other regions.These findings reveal the regional disparities and spatio-temporal patterns of drought evolution in Yunnan Province and provide both a data foundation and theoretical support for the development of differentiated drought emergency response strategies at the prefectural and municipal levels.关键词
干早监测/CHIRPS降水数据/SPEI/干旱应急预案/云南省Key words
drought monitoring/CHIRPS precipitation data/SPEI/drought emergency-response strategies/Yunnan Province分类
资源环境引用本文复制引用
刘旭,何刚成,张童,钟琳玲,任丽遒..基于CHIRPS与SPEI数据集的云南省干旱监测研究[J].人民长江,2026,57(4):91-100,10.基金项目
国家重点研发计划项目(2022YFC3002804) （2022YFC3002804）
