Hydrology Simulation and Glacier Runoff Study in Lhasa River Basin Based on VIC_glacier Model
Glacial meltwater is an important source for the river runoff in Lhasa River,which is the largest tributary of the Brah-maputra River in the southern Qinghai-Tibet Plateau.Based on the VIC_glacier model,this study simulated the runoff process in the Lhasa River Basin from 1990 to 2010.The results show that:(1)compared with the original VIC model,the VIC_glacier model shows good performance in streamflow simulation.The correlation coefficient between the observed daily streamflow and the simulation was close to 0.8,and the Nash efficiency coefficient is above 0.75.(2)From upstream to downstream,the contribution rate of glacial meltwater to runoff was 21.4％(Punduo Station),17.7％(Tangjia Station),and 14.5％(Lhasa Station),respectively.(3)The annual changes of both glacial runoff and non-glacial runoff showed"single-peak"shape,and reached its peak in Au-gust.(4)From 1990 to 2010,the annual glacier runoff showed an increasing trend,which was consistent with the change of air temperature in the same period.However,there is a opposite trend between the contribution of annual glacial meltwater to runoff and the annual precipitation.The findings could provide a scientific basis for water resources management in the Lhasa River Ba-sin.
VIC modeldegree day modelglacier melt waterLhasa River basin
万方数据
维普
