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《Tropical Geography》 2015-01
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Spatio-Temporal Variation of Nitrogen and Phosphorus Pollution in Upriver Watercourse of the Xinfengjiang Reservoir in Guangdong Province

WEN Meili;YANG Long;FANG Guoxiang;ZHOU Xia;ZHANG Hong'ou;Guangdong Open Laboratory of Geospatial Information Technology and Application//Guangzhou Institute of Geography;  
Xingfengjiang Reservoir(XFJR) is the greatest reservoir in Guangdong Province, China. XFJR provides drinking water for a population of 40 million in Huizhou, Dongguan, Shenzhen, Guangzhou and Hong Kong, which have a big portion in economic development of China. At present, water quality of XFJR maintains I type of environmental quality standards for surface water. However, with the fast economic development in the Pearl River Delta and the upriver areas, human activities have become intense and environmental problems become increasingly serious, which may directly influence water quality and quantity of the reservoir. In 2007 and 2008 we collected water samples from upriver watercourse of XFJR and analyzed the nitrogen and phosphorus pollution. The results showed that, nitrogen and phosphorus pollution was more in dry season than that in wet season at time scale, and more in residential area near cities and towns than in rural area at spatial scale. The results indicated that the main pollution was from point source pollution, including domestic sewage and breeding wastewater discharging. The risks of water quality deterioration exist in upriver watercourse of XFJR, which may lead to ecological problems, such as eutrophication and external biological invasion. It is suggested that water quality of the upriver watercourse of XFJR should be monitored regularly so as to protect the stability of water quality of XFJR and reduce the risks of deterioration of drinking water source.
【Fund】: 广东省水利科技项目(2009-44);; 广东省科技计划(2007A032400002、2008A030202011)
【CateGory Index】: X524
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