Variation of Water Quality in Urban Rivers of North Grand Canal in Beijing and Its Response to Land Use in Riparian ZoneChinese Full Text

ZHAO Fei;HUANG Di;GUO Xiao-yu;LIU Ke;ZHAO Wen-hui;College of Resources Environment and Tourism,Capital Normal University;Urban Environmental Processes and Digital Modeling Laboratory;Beijing Municipal Key Laboratory of Resources Environment and GIS;Satellite Surveying and Mapping Application Center,National Administration of Surveying,Mapping and Geoinformation;Beijing Municipal Environmental Monitoring Center;

Abstract: The highly artificialized urban river course mainly supplemented with reclaimed water has become the main carrier of city aquatic ecosystems.Compared with the natural river,water source in artificialized urban river is much more complex,the transport and transformation of water,heat and pollutants between river and inner-city and their response mode have become more sensitive.In this paper,the typical urban rivers supplemented with reclaimed water（Qinghe River,Beixiaohe River,Bahe River,Tonghuihe River） in Beijing were selected.Water quality was monitored in spring and summer in 2004 and 2011 respectively,through statistical analysis the characteristics of water quality parameters,and combining with the structure variation of land use for the buffers in riparian zones at different scales,integrating Pearson correlation and DCCA analysis,the ecological response mode was explored.Possible pollution sources by Factor Analysis were also analyzed.The results showed that compared to the year of 2004,the variability of water quality associated with nitrogen and phosphorus increased but which associated with organic contamination was reduced in 2011.The influence of non-point source of water was diminishing.The artificial regulation effect of reclaimed water on water quality was greater than those of other types of land in the natural ecological corridors.The spatial patterns of elements of water quality were different.The main factors of water pollutant in 2004 were inorganic matters such as nitrogen,phosphorus,acid and alkali,that can be explained as point source phosphorus contribution from cultivated and wood lands,which was the main pollution sources,accompanied by degradation of organic matter,nitrification and other effects in 2004;in 2011,the main water pollution sources turned to organic matters such as COD and NH4+,and also inorganic matters such as nitrogen,phosphorus,acid and alkali.

Keywords：

city watercourse; water quality variation,land use; DCCA; factor analysis; Beijing;

DOI：
10.13248/j.cnki.wetlandsci.2014.03.017
Series：
Subject：
Classification Code：
X52;X143

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Variation of Water Quality in Urban Rivers of North Grand Canal in Beijing and Its Response to Land Use in Riparian ZoneChinese Full Text

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