海河水利Issue(2)：82-88,7.DOI:10.3969/j.issn.1004-7328.2025.02.017
基于SPI的贵州省干旱特性演变研究
Drought Characteristics Evolution in Guizhou Province Based on SPI
摘要
Abstract
This study analyzes 62 years of rainfall series data from 65 meteorological stations in Guizhou Province from 1961 to 2022.Utilizing on the standardized precipitation index(SPI),comprehensive assessment of the drought characteristics in Guizhou Province is conducted,elucidates the spatiotemporal distribution characteristics and evolution trends of drought,and providing decision-making basis for drought disaster forecasting,early warning,disaster prevention and reduction.The results show that the drought incidence rate in the province is 91.9%,with an average drought frequency of 19.4 station times per year.Drought conditions are mainly mild and moderate.The drought prone areas in the province are mainly concentrated in Luodian,Libo,Dushan,Duyun,Congjiang,Rongjiang,Danzhai,Leishan,Kaili,Taijiang and other regions in southern and southeastern Guizhou.The drought tendency rate in the province is 0.117,showing an overall upward trend year by year.According to the results of wavelet analysis,there are several time scales of oscillation periods for drought in the province,specifically at 5-year,11-year,20-year,and 37-year intervals.Notably,the strongest oscillation occurs in the 37a period,which is the first main period of drought in the province.关键词
贵州省/干旱特性/时空分布/演变趋势Key words
Guizhou Province/drought characteristics/spatiotemporal distribution/evolutionary trend分类
农业科技引用本文复制引用
李长江,伯彦萍,安美运,彭芸..基于SPI的贵州省干旱特性演变研究[J].海河水利,2025,(2):82-88,7.基金项目
贵州省科技厅科技支撑项目(黔科合支撑[2022]一般167) （黔科合支撑[2022]一般167）
贵州省水利厅科技项目(kt202319) （kt202319）
