SWAT模型参数敏感度分析及率正研究

Study on the Parameter Sensitivity and Calibration of SWAT Model

摘要：本文应用SWAT模型，结合1986—2000年罗玉沟流域实测水文资料对径流进行模拟，并进行了模型参数敏感度分析及参数的率正与验证，得出率正期的相对误差为14．O％，相关系数为96．1％，Nash—Suttcffe系数为0．89；验证期的相对误差为8．8％，相关系数为91．5％，Nash—Suaclffe系数为0．82。结果表明实测流量和模拟流量的线性回归系数和模型的效率系数满足模型模拟的要求，SWAT模型适用于该研究流域。

This thesis carries out SWAT model to simulate the runoff with the real data collected from Luoyugou wa- tershed in the years from 1986 to 2000. After the Parameter Sensitivity Analysis and Calibration, the conclusions were in calibration period, the relative error is within 14%, relative coefficient and Nash - Suttcliffe coefficient are 96.1% and 0.89 ;and in validation period relative error is within 8.8%, relative coefficient and Nash - Suttcliffe coefficient are 91.5% and 0.82 respectively. The results show that SWAT model could be successfully used to sim- ulate runoff in this area.