简化SWAT模型模拟漓江支流小流域的适用性评价

以漓江支流某小流域作为非点源污染流域研究对象,应用简化的SWAT模型,模拟示范区流域非点源污染的负荷量。通过对SWAT模型的简化,建立适用于漓江支流小流域的非点源污染模型,并对模型的适用性做出评价,得出月均值相对误差Re均小于25%,月相关系数R~2均大于0.7,月效率系数E_(ns)均大于0.5,拟合效果良好。本文研究结果表明,在漓江支流小流域建立简化的SWAT模型,对该流域进行非点源污染模拟是可行的。

Applicability evaluation of simulating small watershed of tributary in Lijiang River by simplified SWAT model

Taking a small watershed of tributaries in Lijiang River as the research object of non-point source pollution,the paper used simplified SWAT model to simulate the loading of non-point source pollution in the demonstration area.By simplifying SWAT model, it established non-point source pollution model which applied to small watershed tributaries in Lijiang River,and. evaluated the applicability of the model and got the conclusion that the relative error (Re) is less than 25%, the correlation coefficient (R²) is larger than 0.7 and Nash-Sutcliffe coefficient of efficiency (E_ns) is larger than 0.5.The fitting effect is good. The result indicates that it is feasible to establish the simplified SWAT model in watershed of tributaries in Lijiang River for simulating the non-point source pollution.