Agricultural non-point source pollution discharge characteristic and its control measures of Dongtinghu Lake

作者：Lu, Shao Yong^*; Zhang, Ping; Pan, Cheng Rong; Peng, Shu Chuan; Liu, Xiao Hui

来源：China Environmental Science, 2017, 37(6): 2278-2286.

• Agricultural non-point source pollutions
• Agricultural nonpoint sources
• Clustering analysis
• Equal standard pollution method
• Export coefficient models
• Non-point source pollution
• Regional differences
• Spatial characteristics

To clarify the spatial characteristics of agricultural non-point source pollution in Dongtinghu Lake. Pollution loads from agricultural nonpoint sources in Dongtinghu Lake were estimated and evaluated according to the approach of export coefficient modeling as well as the equal standard pollution method. In addition, spatial distribution of non-point source pollution load was drew by GIS. The results demonstrated that total nitrogen and total phosphorus loads in Dongtinghu Lake respectively were104556.9t/a, 12719.02t/a;103643.71t/a and 13032.79t/a in 2010 and 2014. The magnitude order of the contribution to various types of pollutant sources was as following, 1) dry land >paddy field >livestock and poultry breeding >forest land >rural life for total nitrogen load;2) livestock and poultry breeding >dry land >paddy field >woodland >rural life for total phosphorus load, respectively. Dry land and livestock farming was the main source of agricultural non-point source pollution load. For the spatial regularity, the space TN, TP pollution distribution is consistent, but regional differences between TN and TP in the output load. The priority control areas were Taoyuan county, HanShou, Lixian, Ding cheng, Nanxian, Anhua, Huarong, where the ANP output load was high. With clustering analysis method, the agricultural non-point source pollution was divided into 4types of pollution, and control countermeasures were put forward.

• 出版日期2017
• 单位合肥工业大学