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	Model analysis of dissolved inorganic phosphorus exports from the Yangtze river to the estuary
	Li X. Y. ; Yang L. B. ; Yan W. J.
	2011
关键词	Eutrophication Fluvial transport Model Phosphorus The Yangtze River east china sea changjiang river spatially explicit nitrogen budgets coastal zone global-model gorges dam runoff eutrophication watersheds
英文摘要	In this paper, we estimate the inputs of phosphorus (P) to the Yangtze River Basin and exports of dissolved inorganic phosphorus (DIP) from the river to the estuary for the period 1970-2003, by using the global NEWS-DIP model. Modeled DIP yields range from 2.5 kg P km(-2) yr(-1) in 1970 to 4.6 kg P km(-2) yr(-1) in 1985, and then dramatically increase to 14.1 kg P km(-2) yr(-1) in 2003. No significant difference between the modeled and measured values at the level of P = 0.05 is observed. The study also demonstrates variable source contributions of P to the modeled DIP during the period 1970-2003. Point sewage P input accounted for approximately 100% in the period 1970-1985 and substantially decreased to 24.8% in 2003. Chemical fertilizer contributed 25.4% of DIP yields in 1986 and increased continuously to 50.3% in 2003, while a stable trend in manure P contribution averaging 22.9% of DIP yields was shown in the same period. The study concludes that P inputs to the Yangtze River Basin and the river DIP export to the estuary have substantially increased during the study period consequence to human pressure.
出处	Nutrient Cycling in Agroecosystems
卷	90
期	1
页	157-170
收录类别	SCI
语种	英语
ISSN号	1385-1314
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/23597]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Li X. Y.,Yang L. B.,Yan W. J.. Model analysis of dissolved inorganic phosphorus exports from the Yangtze river to the estuary. 2011.

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