【摘要】 通过构建大尺度分布式VIC(variable infiltration capacity)模型,对拉萨河流域的水文过程进行了模拟,并以拉萨水文站为控制站点对模型进行率定和验证.结果表明:日尺度上,率定期和验证期的Nash-Suttcliffe效率系数(ENS)、确定性系数(R2)、相关性系数(r)基本都在0.80以上;月尺度上,3个指标达0.90以上;空间上,网格水量相对误差都小于1%.表明VIC模型能够较好地应用于拉萨河流域,适用性较好.VIC模型的构建,为研究气候变化对拉萨河流域水循环的影响奠定了基础.更多还原

【Abstract】 Hydrological processes in the Lhasa River(LR) basin were simulated by using a macro-scale distributed VIC model.Lhasa hydrological station was selected as controlling station to calibrate and validate the VIC model.Data showed that the Nash-Sutcliffe efficiency coefficient(ENS),deferministic coefficient(R2) and correlation coefficient(r) were greater than 0.80 on a daily scale and greater than 0.90 on a monthly scale,respectively.The relative errors for water balance of grids were all smaller than 1%.It is demonstrated that VIC model can be applied to the LR basin satisfactorily.The VIC model becomes a basis for investigating the response of hydrological cycle to climate change in the LR basin.更多还原