SWAT模型在赣江流域的适用性及参数敏感性

Applicability and parameter sensitivity of SWAT model in Ganjiang River Basin

为评估和管理赣江流域水资源,基于ArcGIS10.2构建了SWAT模型对赣江外州站以上流域进行了模拟。模型中涉及的模型验证、参数率定和敏感性分析,采用了SUFI算法来处理。并基于月尺度、年尺度对研究区域选取近50 a的径流进行模拟。为了评价模型的可行性和拟合程度,计算了拟合系数R 2和纳什系数Ens。结果表明,实测过程线与月尺度和年尺度的径流接近吻合,拟合程度也非常良好,年尺度径流模拟甚至在两个不同时期下得出相同结果。达到了预期期望,事实证明选用的SWAT模型在赣江外州站以上流域模拟具有良好的效果。

To assess water resources for Ganjiang River Basin management,SWAT model is established based on ArcGIS 10.2 to simulate the situation of the basin above the Ganjiang Waizhou Station,which involves many parameters,interest rate sensitivity analysis and model verification,and research based on the scale of nearly 50 years of runoff simulation.To assess the applicability of the model,the correlation coefficient R 2 was calculated,and the Nash Ens results show that the line measures corresponded basically with the process and the scale of monthly and annual expenses,and a good adjustment was made so that the simulated pollutant in the annual scale had the same result in two different periods.SWAT model is selected to simulate the catchment area above Ganjiang Waizhou Station,and good results are obtained.