【摘要】 在淮河息县流域利用LH-OAT法进行SWAT模型的参数敏感性分析,得到了该地区模型参数敏感性排位,并从中选出6个敏感参数进行人工率定,大大提高了参数率定效率。模拟结果率定期(1980-1990年)月径流系列NS系数达到0.80,验证期(1991-1995年)为0.75,模型模拟效果较好。利用SUFI-2法进行参数的不确定性分析后,率定期和验证期的NS系数分别达到0.84、0.81,进一步提高了模型模拟精度和应用效果。更多还原

【Abstract】 In this paper,SWAT model is applied to the Xixian River Basin,located at the headwaters of the Huaihe River,for monthly runoff simulation.After the parameter sensitivity analysis(LH-OAT method),the sensitive parameters in this region were got and the six most sensitive parameters for artificial calibration were selected.The Nash-Suttcliffe coefficient of calibration and validation period were 0.80 and 0.75,which shows that the SWAT performs well in the Xixian River Basin.What’s more,after the uncertainty analysis(SUFI-2 method),the Nash-Suttcliffe coefficient of calibration and validation period came to 0.84 and 0.81,which shows that the model accuracy and application effect has been improved.更多还原