东昆仑库木库里盆地典型湖泊水量蒸发损失估算OA北大核心CSTPCD

Estimating lake water evaporation losses is of significant importance for addressing water scarcity in arid regions and for the protection of lake ecosystems.This study analyzed the spatiotemporal variations of actual evapotranspiration(ET)in three typical lakes within the Kumukuli Basin of East Kunlun Mountains over the past 20 years.Using empirical formulas,we estimated the evaporation losses and applied a random forest model to identify potential factors influencing changes in lake water evaporation.This study examines the spatiotemporal variation in ET of typical lakes in the Kumukuli Basin of East Kunlun Mountains using PML-V2 data,estimates water loss due to lake evaporation through empirical formulas,and explores the influencing factors of lake ET changes using a random forest model.Key findings include(1)From 2001 to 2020,the annual ET of Ayakkum Lake,Aqqikkol Lake,and Whale Lake exhibited a fluctuating trend,initially increasing,then decreasing,and sub-sequently showing a gradual increase,with peak and trough occurring in 2004 and 2012,respectively.(2)The ET of the three lakes demonstrated an inverted U-shaped pattern within the year,with Ayakkum Lake peaking in June and the other two lakes in July.Aqqikkol Lake exhibited a relatively gentle increase,while Whale Lake saw a sig-nificant rise from May to July,reaching 48.45 mm·month-1.(3)During the same period,the evaporation water volume of the three lakes increased,with Ayakkum Lake recording the highest at 10.33×108 m3·a-1,followed by Aqqikkol Lake at 4.54×108 m3·a-1,and Whale Lake at 3.33×108 m3·a-1.(4)Analysis using the random forest mod-el indicates that lake area significantly influences evaporation volume.Additional factors,including increases in wind speed,maximum temperature,and precipitation,also drive evaporation changes,contributing over 45％cu-mulatively.