Wuchuan catchment in the upstream of Jiulong River was selected as a study site.The AGNPS model was adopted to simulate agricultural non-point source pollution.

• 在九龙江上游遴选了一个典型农业流域-五川流域，将AGNPS模型全面、系统地引入到五川流域的农业非点源污染的模拟研究中。