SWAT模型在北方高寒地区径流模拟中的适用性研究

Applicability Study of Runoff Simulation in North Cold Area Based on SWAT Model

由于特殊的气候和下垫面条件,北方高纬度寒区流域日径流过程往往具有较大的非线性。诸多水文模型在该地区日流量模拟过程中适用性较差,这对寒区开展洪水预报、干旱和环境污染治理等工作造成了很大的困难。在结合已有研究的基础上,将SWAT模型应用于寒区,评估了其在寒区日流量模拟中的适用性,并对率定参数进行了敏感性分析,研究结果表明:率定期NSE为0.89,BIAS为1.10%,R^2为0.89,验证期NSE为0.79,BIAS为-5.72%,R^2为0.79,流量模拟效果较好,表明SWAT模型在寒区径流模拟中具有较好的适用性。

Because of the particular climate and the underlying surface, the cold regions＇runoff tend to have larger nonlinear. Plenty of hydrological models are lack applicability on daily streamflow process simulation and it is hard to work onpredicting floods, preventing draught andwater pollution in cold area. Based on the existing reserch, this paperevaluated the applicability of daily streamflow simula- tion by using SWAT model in cold area. We also analysed the the sensitivity and uncertainty parameters. The results showed that SWAT model had a good applicability in cold area, including NSE（0. 89）, BIAS（ 1.10% ）, R2（0. 89）in candidation period and NSE （0.79）, BIAS（5.72% ）, R2（0.79） in validation period.