水科学进展2026，Vol.37Issue(2)：235-246,12.DOI:10.14042/j.cnki.32.1309.2026.02.004
青藏高原拉萨河流域径流组成及驱动因素
Runoff composition and its driving factors in the Lhasa River Basin,Tibetan Plateau
摘要
Abstract
Cryospheric change on the Tibetan Plateau is reshaping its hydrological processes and threatening regional water security.The Lhasa River,which is the largest tributary of the Yarlung Tsangpo River,is a typical example of a river in a meltwater-fed basin that is highly sensitive to climate change.Using the VIC-glacier model constrained by multisource datasets,including meteorological and hydrological observations,glacier inventories,and satellite snow products,the runoff components of the Lhasa River Basin during 1975-2016 were reconstructed and partitioned.The daily discharge was consistently reproduced at four gauges(Nash-Sutcliffe efficiency:>0.70;relative error:<10%).At the downstream gauge on the Lhasa River,mean annual runoff was dominated by rainfall runoff(75.8%),with snowmelt and glacier melt water contributing 22.2%and 2.0%,respectively;at the upstream Yangbajing gauge,glacier melt water accounted for 41.8%of runoff.Over the study period,snowmelt runoff declined substantially(-0.693 mm/a),whereas glacier meltwater runoff increased(0.047 mm/a).Precipitation was the primary control on runoff variability,while air temperature reshaped runoff composition by regulating meltwater processes,exhibiting pronounced seasonal contrasts.These findings provide a scientific basis for assessing water-resource changes and supporting adaptive management in high-altitude basins.关键词
径流成分/VIC-glacier模型/冰雪融水/气候变化/拉萨河流域/青藏高原Key words
runoff components/VIC-glacier model/snow and glacier melt/climate change/Lhasa River Basin/Tibetan Plateau分类
天文与地球科学引用本文复制引用
谷黄河,焦雅迪,王晓燕,鞠琴,江鹏,余钟波..青藏高原拉萨河流域径流组成及驱动因素[J].水科学进展,2026,37(2):235-246,12.基金项目
国家自然科学基金项目(42271020 （）
42277074) The study is financially supported by the National Natural Science Foundation of China(No.42271020 （）
No.42277074). （）
