预测非点源营养负荷的输出系数法研究进展与应用

非点源污染与流域土地利用之间的关系非常密切，以此为基础的输出系数法在国外获得了长足的发展，并得到广泛应用。在早期输出系数方法的基础上，阐述了国外几个典型的改进输出系数模型，代表了这类方法的主要研究进展与发展方向。讨论了输出系数的确定方法，给出了输出系数法在黑河流域的应用实例。这类模型具有结构简单、应用方便的特点，很适合我国的资料条件。

The Export Coefficient Modeling Approach for Load Prediction of Nutrient from Nonpoint Source and Its Application

There is a very close relation between nonpoint source pollution and land use in watershed. On the basis of this fact, the export coefficient modeling approach oenjoyed a big development abroad and found wide application. Based on the early stage of the export coefficient approach, several typical and improved models are introduced and discussed, whereby representing the main achievements and development direction of the approach. Then, the determination method of export coefficients is discussed. And finally, a case study of export coefficient approach is carried out in Heihe watershed. This kind of model is characterized by simple structure, easy application and very good adaptation for the Chinese data.