通过对2005年与2000年入河污染物总量的分析表明，点源在入河污染物总量中的占比逐年下降，面源的占比迅速增加，尤其是TP（总磷） 入河量已经超过点源；面源污染呈“总量持平，结构调整”态势； 面源污染物总量构成中，农村居民生活位居第一，其次是水产养殖、水田径流等。在面源污染成因分析基础上，相应提出了太湖流域平原水网区面源污染控制的对策建议。

Comparing the total pollution load into rivers in 2005 with the one in 2000, the analysis suggests that the percentage of point sources in total kept reducing year by year, and the non-point sources increased significantly, especially total phosphorus (TP) whose amount of pollution from non-point sources have already exceeded that from point sources. The total amount of pollution from non-point sources was almost equal, but its composition changed. The pollution from rural domestic sewage ranks first and the pollution from aquaculture and fields ranks second in the total amount of pollution from non-point sources. Based on the analysis of causes of non-point sources pollution, this essay gives some suggestion on the control of non-point sources pollution in plain river network of Taihu Basin.