Based on the water environmental quality analysis of Songhuajiang Rivers in Jilin Province,the water management model is developed,which meets the standards of water environmental functions in different river sections,by integrating point sources with nonpoint sources,introducing response coefficient and optimal theory.

This paper reviews on nonpoint source runoff quality simulation models in foreign cities in order to take them as the reference for the city environment protectors when they manage nonpoint source pollution.

This paper mainly introduces the complement, the condition and the use of applying the way of pollutant discharged trade to reduce the nonpoint source pollution,especially discusses the way to reduce the phosphorus pollution in Tai Lake.

Based on field survey,it is identified that the non-point sources of Wuli Lake are from urban roads,residential areas,agriculture,and fertilization of greensward.

Studying and Applying advanced non-point sources (NPS) pollution model in China is not only the need of theoretical study of NPS pollution model, but also the need of the practices of NPS pollution control in China.

Fix-quantity research of non-point source pollution has to be imperative under the situation.

This paper elaborates the importance and effect of a network monitoring the non-point sources pollution of groundwater in urban areas.

With carrying on the protection projects, the non-point pollution becomes one of the major reasons of the inorganic nitrogen pollution of the XiaoQing River Basin.

The simple storm-runoff pollution and the annual non-point source pollution loading of inorganic nitrogen in Xiaoqing River basin were calculated by using the mathematic model.

Nitrogen output and transportation observation was conducted in surface runoff plots of different purple soil farmlands.