%0 Journal Article
%T Spatial Distribution and Pollution Source Identification of Agricultural Non-Point Source Pollution in Fujiang Watershed<br>涪江流域农业非点源污染空间分布及污染源识别
%A DING Xiao-wen
%A SHEN Zhen-yao
%A <br>丁晓雯
%A 沈珍瑶
%J 环境科学
%D 2012
%I 
%X In order to provide regulatory support for management and control of non-point source (NPS) pollution in Fujiang watershed, agricultural NPS pollution is simulated, spatial distribution characteristics of NPS pollution are analyzed, and the primary pollution sources are also identified,by export coefficient model (ECM) and geographic information system(GIS). Agricultural NPS total nitrogen (TN) loading was of research area was 9.11×104 t in 2010, and the average loading was intensity was 3.10 t·km-2. Agricultural NPS TN loading mainly distributed over dry lands, Mianyang city and gentle slope areas; high loading intensity areas were dry lands, Deyang city and gentle slope areas. Agricultural land use, of which contribution rate was 62.12%, was the most important pollution source; fertilizer loss in dry lands, of which contribution rate was 50.49%, was the prominent. Improving methods of agricultural cultivation, implementing "farm land returning to woodland" policy, and enhancing treatment efficiency of domestic sewage and livestock waster wate are effective measures.
%K Fujiang watershed
%K agricultural non-point source
%K total nitrogen(TN)
%K export coefficient model(ECM)
%K spatial distribution
%K pollution source identification<br>涪江流域
%K 农业非点源
%K 总氮
%K 输出系数模型
%K 空间分布
%K 污染源识别
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=F9526B67CD9E32E00EA9F20D3FEAC932&yid=99E9153A83D4CB11&vid=27746BCEEE58E9DC&iid=708DD6B15D2464E8&sid=5A02FE3A1B0DEE75&eid=A68113934D2250BE&journal_id=0250-3301&journal_name=环境科学&referenced_num=0&reference_num=30