%0 Journal Article
%T Temporal Variation of Water Quality and Driving Factors in Yanghe Watershed of Zhangjiakou<br>洋河流域张家口段河流水质演化及驱动因子分析
%A PANG Bo
%A WANG Tie-yu
%A LV Yong-long
%A DU Li-yu
%A LUO Wei
%A <br>庞博
%A 王铁宇
%A 吕永龙
%A 杜立宇
%A 罗维
%J 环境科学
%D 2013
%I 
%X Yanghe is an important water source for Guanting Reservoir, which once supplied the Beijing city with drinking water, industrial process water and water-use in landscape. Based on the data of water quality monitored by Yanghe watershed monitoring stations from 1992 to 2009, 11 pollutants were selected for analysis. The trends of changes in water quality were figured out, and the major pollutants and driving factors were measured by the integrated standard index and grey correlation analytical methods. The results showed that there were two stages of water quality change in Yanghe watershed of Zhangjiakou. Firstly, the water was polluted seriously but recovered rapidly from 1992 to 1996.Secondly, although light pollution occurred in the watershed from 1997 to 2009, the pollution factors were still above the limits. The main pollution factors are ammonia nitrogen, petroleum, permanganate index,BOD5, Cr6+ and Cd. The main driving factor of water quality is the change of land use type, and the agricultural land showed less impact on water quality than the industrial land.
%K variation of water quality
%K land use
%K pollution index
%K grey correlation analysis
%K Yanghe watershed<br>水质演化
%K 土地利用
%K 污染指数
%K 灰色关联度
%K 洋河流域
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=9C65539B20E123FCADE274A8CC9C2601&yid=FF7AA908D58E97FA&vid=339D79302DF62549&iid=CA4FD0336C81A37A&sid=9EF602EA28138BEA&eid=05340B75C67FF664&journal_id=0250-3301&journal_name=环境科学&referenced_num=0&reference_num=26