Pang Bo, Wang Tie-Yu, Lü Yong-Long, Du Li-Yu, Luo Wei
College of Land and Environment, Shenyang Agricultural University, Shenyang 110866, China.
Huan Jing Ke Xue. 2013 Jan;34(1):379-84.
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.
洋河是官厅水库的重要水源地，官厅水库曾为北京市提供饮用水、工业生产用水和景观用水。基于洋河全流域监测站点1992年至2009年的水质监测数据，选取11种污染物进行分析。通过综合标准指数法和灰色关联分析法，分析得出水质变化趋势，确定主要污染物及其驱动因素。结果表明，张家口洋河全流域水质变化呈现两个阶段。第一阶段，1992年至1996年，水质污染严重但恢复迅速。第二阶段，1997年至2009年，流域内虽出现轻度污染，但污染因子仍超标。主要污染因子为氨氮、石油类、高锰酸盐指数、生化需氧量、六价铬和镉。水质变化的主要驱动因素是土地利用类型的变化，其中农用地对水质的影响小于工业用地。
