SWAT模型在新蔡河流域面源污染研究中的应用

Application of SWAT Model in the Study on Non-point Source Pollution in Xincai River Basin

[目的]应用SWAT模型对新蔡河流域的径流、泥沙及面源污染负荷的产输出过程进行模拟计算。[方法]首先介绍了SWAT模型的原理,然后对模型径流参数和水质参数进行率定和验证,最后利用SWAT模型研究新蔡河流域的泥沙及面源污染负荷的产输出特性。[结果]SWAT模型基本合理可行,可用于新蔡河流域面源污染的模拟计算。模拟结果表明,丰水年泥沙和各种面源污染物负荷都比较大,平水年次之,枯水年最小,这说明泥沙和面源污染的产输出与当年的降雨径流量有关。[结论]该研究为流域面源污染的防治提供了科学依据。

[Objective] The study aimed to simulate the producing and transporting process of flow,sediment and non-point source pollution in Xincai River basin based on SWAT model.[Method] On the basis of analyzing the principles of SWAT model,the correlative parameters of flow and water quality were calibrated,then the spatial and temporal distribution of flow,sediment and non-point source pollution in Xincai River basin were studied using the SWAT model.[Result] The results of calibration and validation showed that the SWAT model was reasonable and available,and it can be used to simulate the non-point source pollution of Xincai River basin.The simulated results revealed that the amount of sediment and various pollutants＇ load was the highest in the rainy year,followed by the normal year,while it was the minimum in the dry year,which indicated that the production and output of sediment and non-point source pollution were closely related to annual runoff.[Conclusion] The research could provide scientific references for the prevention of non-point source pollution in a basin.