Quantification of agricultural drought recovery time and analysis on its influencing factors at different time scales in the Yangtze River Basin
To mitigate losses caused by agricultural drought,drought recovery standards based on gross prima-ry productivity(GPP)are established,quantifying the recovery time of agricultural drought at different tempo-ral scales.The random forest algorithm is employed to analyze the influencing factors of drought recovery time,determining the most significant factors affecting drought recovery duration at different time scales.The result reveals that the average drought recovery times at the 1,6,12,and 24-month time scales are 5.7,3.9,3.8,and 3.0 months,respectively.As the time scale increases,there is a gradual decrease in drought recov-ery time.In terms of spatial distribution,regions characterized by longer drought recovery times are mainly distributed in the western and southeastern regions of the Yangtze River Basin.The analysis on influencing factors indicates that meteorological variables are the primary determinants affecting drought recovery time in the short time scales.However,over the longer time scales,the season of drought occurrence exerts greater influence on drought recovery time.
drought recovery timerandom forestinfluencing factorYangtze River Basin
万方数据
维普
