1.河海大学 水文水资源与水利工程科学国家重点实验室;2.河海大学 水文水资源学院;3.上海勘测设计研究院有限公司;4.扬州大学 水利科学与工程学院
国家自然科学基金资助项目（42271020，42277074）； 水文水资源与水利工程科学国家重点实验室专项经费(521013122，2021490611, 2020490611)
1.State Key Laboratory of Hydrology,Water Resources and Hydraulic Engineering Science,Hohai University,Nanjing Jiangsu;2.China;3.Hydrology and Water Resources Academy,Hohai University,Nanjing Jiangsu;4.Shanghai Survey,Design and Research Institute Co,Ltd;5.College of Hydraulic Science and Engineering,Yangzhou University,Yangzhou,;6.College of Hydraulic Science and Engineering,Yangzhou University,Yangzhou
拉萨河作为青藏高原南部雅鲁藏布江最大的支流，冰川融水是其径流的重要组成部分。本文基于VIC模型和度日模型构建的VIC_glacier模型，模拟了1990-2010年拉萨河流域径流过程。结果表明：1）模拟效果较好，相关系数接近0.8，考虑冰川消融的VIC_glacier模型较原VIC模型相对误差减少了20 %左右，纳什系数提高了0.1左右；2）从上游到下游，冰川融水对径流的贡献率分别为21.4 %（旁多站）、17.7 %（唐加站）、14.5 %（拉萨站），呈逐渐减少情形；3）冰川径流和非冰川径流年内变化均呈现“单峰型”，且在8月份达到峰值；4）1990年-2010年间，年冰川径流整体呈现上升趋势，与同期气温上升的变化规律一致；年降水量增加会削减年冰川融水对径流的贡献率。研究成果可为拉萨河流域的水资源管理提供科学依据。
At high altitudes, glacial melt water is an important source of replenishment for rivers, and the Lhasa River, as the largest tributary of the Brahmaputra River in the southern part of the Qinghai-Tibet Plateau, is an important part of its runoff. This paper simulates the runoff process of the Lhasa River Basin from 1990 to 2010 based on the VIC_glacier model constructed by the VIC model and the day model. The results showed that: 1) the correlation coefficient of the simulation effect was close to 0.8, the relative error of the VIC_glacier model considering glacial melting was reduced by about 20% compared with the original VIC model, and the Nash coefficient was increased by about 0.1; 2) the proportion of glacial melt water from upstream to downstream Punduo, Tangga and Lhasa stations was 21.4%, 17.7% and 14.5%, respectively, and the contribution of glacial meltwater gradually decreased. 3) From 1990 to 2010, the overall trend of glacial melt water increased, increasing by 180 million cubic meters of water per year; 4) the proportion of glacial melt water runoff in spring was the highest, and the contribution rate of spring melt water rose slowly with the temperature, and the inter-annual variation characteristics were consistent with the temperature change. This study provides a scientific basis for the management and application of water resources in the cold plateau areas such as the Lhasa River Basin.