自然资源遥感2025，Vol.37Issue(5)：15-23,9.DOI:10.6046/zrzyyg.2024195
青海东达布逊湖湖泊面积和水量的变化研究
Variations in area and water volume of East Dabuxun Lake,Qinghai Province
摘要
Abstract
Changes in lake area and water volume exert significant impacts on the ecological environment of arid regions.Targeting East Dabuxun Lake,Golmud River Basin,Qinghai Province,this study developed a multi-index random forest algorithm based on the Google Earth Engine(GEE)cloud platform and Landsat imagery to extract the lake area from 1987 to 2021.Then,an area-water level relationship was established using laser altimetry data from ICESat and CryoSat satellites to estimate changes in water volume.Finally,the impacts of natural factors and human activities on the lake were evaluated,using ERA5-Land climate data and records of potash mining,along with correlation analysis and random forest-based contribution assessment.The results indicate that the temporal changes in lake area over time can be divided into five stages:expansion,shrinkage,recovery,re-shrinkage,and rapid recovery.Spatially,the lake exhibited a pattern of shrinkage in the south and expansion towards the northwest.From 2003 to 2021,the water volume of East Dabuxun Lake showed an upward trend.Temperature,glacier and permafrost melting,and solar radiation were identified as the main natural factors influencing lake area,with contribution rates of 31.0%,29.4%,and 15.5%,respectively.In terms of human activities,potash mining emerged as a major driver of lake area changes after 2010.Based on predictions by the auto-regressive moving average model(ARIMA),the lake area is projected to decline to 302.78 km2 by 2030.关键词
随机森林/湖泊水量估算/相关性分析/湖泊面积预测/东达布逊湖Key words
random forest/lake water volume estimation/correlation analysis/lake area prediction/East Dabuxun Lake分类
计算机与自动化引用本文复制引用
周玉静,金晓媚,马靖宣,李晴..青海东达布逊湖湖泊面积和水量的变化研究[J].自然资源遥感,2025,37(5):15-23,9.基金项目
国家自然科学基金项目"干旱区大尺度地下水蒸发排泄机理及遥感计算方法研究"(编号:41372250)资助. （编号:41372250）
