The Spatial-Temporal Pattern and Source Apportionment of Water Pollution in a Trans-Urban River
Qianqian Zhang1,2, Xiaoke Wang2, Wuxing Wan2,3, Peiqiang Hou4, Ruida Li2, Zhiyun Ouyang2
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1Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Science,
Shijiazhuang, 050061, China
2State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences,
Chinese Academy of Sciences, Beijing 100085, China
3College of Life Science, Hebei Normal University,
Shijiazhuang 050016, China
4Asia-Pacific Institute of Construction Scitech Information,
Beijing 100120, China
Pol. J. Environ. Stud. 2015;24(2):841–851
Deteriorating water quality in urban areas has drawn wide interest in China. In our study, water quality was monitored monthly during December 2009-November 2011 from 16 sites located in a trans-urban river. The spatial pattern showed that the concentrations of EC, Ca2+, Mg2+, BOD5, CODcr, TP, and NH4 +-N were higher midstream and downstream than upstream, while measured pH and DO upstream were higher than measurements midstream and downstream. The temporal pattern showed that the concentrations of EC, TP, BOD5, H4 +-N, Mg2+, and Ca2+ in the wet season were lower than in the dry season, while the concentrations of CODcr in the wet season were higher than in the dry season. Receptor-based source apportionment revealed that most of the variables were influenced by domestic sewage, cropland, and woodland runoff pollution. Therefore, the best method to prevent water quality degradation is to manage the domestic sewage, cropland, and woodland runoff.