A nitrogen budget of the Changjiang river catchment

	A nitrogen budget of the Changjiang river catchment
	Shen, ZL; Liu, Q; Zhang, SM; Miao, H; Zhang, P
	2003-02-01
发表期刊	AMBIO
ISSN	0044-7447
卷号	32 期号:1 页码:65-69
文章类型	Article
摘要	Based on 1997-1998 field investigations in the Changjiang river mouth, rain sampling from the river's upper reaches to the mouth, historical data, and relevant literature, the various sources of Total Nitrogen (TN) and Dissolved Inorganic Nitrogen (DIN) in the Changjiang river catchment and N transport in the Changjiang river mouth were estimated. The export fluxes of various form of were mainly controlled by the river runoff, and the export fluxes of NO3-N, DIN and TN in 1998 (an especially heavy flood year) were 1438 103 tonnes (t) yr(-1) or 795.1 kg km(-2) yr(-1) 1746 10(3) t yr(-1) or 965.4 kg km(-2) yr(-1) and 2849 10(3) t yr(-1) or 1575.3 kg km(-2) yr(-1), respectively. The TN and DIN in the Changjiang river came mainly from precipitation, agricultural nonpoint sources, N lost from fertilizer and soil, and point sources of industrial waste and residential sewage discharge, which were about 56.2% and 62.3%, 15.4% and 18.5%, 17.1% and 14.4%, respectively, of the N outflow at the Changjiang river mouth; maximum transport being in the middle reaches.; Based on 1997-1998 field investigations in the Changjiang river mouth, rain sampling from the river's upper reaches to the mouth, historical data, and relevant literature, the various sources of Total Nitrogen (TN) and Dissolved Inorganic Nitrogen (DIN) in the Changjiang river catchment and N transport in the Changjiang river mouth were estimated. The export fluxes of various form of were mainly controlled by the river runoff, and the export fluxes of NO3-N, DIN and TN in 1998 (an especially heavy flood year) were 1438 103 tonnes (t) yr(-1) or 795.1 kg km(-2) yr(-1) 1746 10(3) t yr(-1) or 965.4 kg km(-2) yr(-1) and 2849 10(3) t yr(-1) or 1575.3 kg km(-2) yr(-1), respectively. The TN and DIN in the Changjiang river came mainly from precipitation, agricultural nonpoint sources, N lost from fertilizer and soil, and point sources of industrial waste and residential sewage discharge, which were about 56.2% and 62.3%, 15.4% and 18.5%, 17.1% and 14.4%, respectively, of the N outflow at the Changjiang river mouth; maximum transport being in the middle reaches.
关键词	Coastal Eutrophication Nutrient Structure World Rivers Phosphorus Pollution Estuaries Waters Cycle Bay
学科领域	Engineering, Environmental ; Environmental Sciences
收录类别	SCI
语种	英语
WOS记录号	WOS:000182798600011
引用统计	被引频次：59[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/2792
专题	海洋生态与环境科学重点实验室实验海洋生物学重点实验室
作者单位	Chinese Acad Sci, Key Lab Marine Ecol & Environm Sci, Inst Oceanog, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Shen, ZL,Liu, Q,Zhang, SM,et al. A nitrogen budget of the Changjiang river catchment[J]. AMBIO,2003,32(1):65-69.
APA	Shen, ZL,Liu, Q,Zhang, SM,Miao, H,&Zhang, P.(2003).A nitrogen budget of the Changjiang river catchment.AMBIO,32(1),65-69.
MLA	Shen, ZL,et al."A nitrogen budget of the Changjiang river catchment".AMBIO 32.1(2003):65-69.

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