In 2022,Jiangxi Province encountered a rare drought in 61 years,which had a certain impact on the social economy,production and life,and the temporal and spatial variation characteristics of drought in Jiangxi Province in 2022 were analyzed based on standardized precipitation index and soil relative humidity index.The de-velopment of meteorological drought is divided into four stages and its spatio-temporal change characteristics are identified,and the temporal response between agricultural drought and meteorological drought is analyzed by corre-lation to reveal the drought change process in different soil depths.The results show that:(1)the drought in Jian-gxi Province in 2022 mainly occurs from July to December,and the development process of meteorological drought can be divided into drought outcropping period,outbreak period,continuous period and mitigation period;(2)In 2022,the occurrence time of agricultural drought in Jiangxi Province is one month later than that of meteorological drought,and the impact of precipitation on Rsm in the study area is significantly greater than that of temperature,and Rsm of 20 cm is the most correlated with SPI-1 index.(3)Water projects play an important role in the drought control period,and the goal of Jiangxi Province's grain production"ten years of abundance"is achieved without major disasters in the year of drought.
关键词
江西省/2022年干旱/标准化降水指数/土壤相对湿度/发展过程/滞后时间
Key words
Jiangxi Province/drought in 2022/standardized precipitation index/relative soil moisture/develop-ment process/delay time
维普
万方数据