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	Nitrogen flow analysis in Huizhou, South China
	Ma, Xiaobo ; Wang, Zhaoyin ; Yin, Zegao ; Koenig, Albert
	2010-05-11 ; 2010-05-11
关键词	nitrogen flow material accounting export coefficient method Huizhou East River Basin LAND-USE CHANGE EXPORT COEFFICIENT IMPACT CATCHMENT Environmental Sciences
中文摘要	Eutrophication due to uncontrolled discharges of nitrogen and phosphorus has become a serious pollution problem in many Chinese rivers. This article analyzes the nitrogen flow in Huizhou City in the East River watershed in south China. The material accounting method was applied to investigate the nitrogen flows related to human activities, which consist of the natural and anthropogenic systems. In Huizhou City, the nonpoint source pollution was quantified by the export coefficient method and the domestic discharge was estimated as the product of per capita nitrogen contribution and population. This research was conducted based on statistical information and field data from 1998 in the Huizhou City. The results indicated that the major nitrogen flows in this area were river loads, fertilizer and feedstuff imports, atmospheric deposition, animal manure volatilization, and processes related to burning and other emissions. In 1998, about 40% of the nitrogen was retained in the system and could result in potential environmental problems. Nitrogen export was mainly by rivers, which account for about 57% of the total nitrogen exported. Comparisons made between the East River and the Danube and Yangtze Rivers show that the unit area nitrogen export was of the same magnitude and the per capita nitrogen export was comparable.
语种	英语 ; 英语
出版者	SPRINGER ; NEW YORK ; 233 SPRING STREET, NEW YORK, NY 10013 USA
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/27346]
专题	清华大学
推荐引用方式 GB/T 7714	Ma, Xiaobo,Wang, Zhaoyin,Yin, Zegao,et al. Nitrogen flow analysis in Huizhou, South China[J],2010, 2010.
APA	Ma, Xiaobo,Wang, Zhaoyin,Yin, Zegao,&Koenig, Albert.(2010).Nitrogen flow analysis in Huizhou, South China..
MLA	Ma, Xiaobo,et al."Nitrogen flow analysis in Huizhou, South China".(2010).

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