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In conjunction with agricultural development and the increasing amount of chemical fertilizers and pesticides used in China, there is a growing body of evidence that non-point source (NPS) pollution, especially agricultural NPS pollution, is a particularly serious problem in the management of water quality in China [1]. Investigation of Eutrophication in the Dianchi watershed suggests that the Total Nitrogen (TN) generated by NPS pollution comprises 44.5% of the total pollution load, whereas the Total Phosphorus (TP) comprises 26.7% [2]. Similarly, survey results in the Taihu lake watershed show that the TN and TP loads generated by NPS pollution were 59% and 30%, respectively [3]. It is apparent that NPS pollution has become a primary threat to watershed health in China.