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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.
Source PublicationNutrient Cycling in Agroecosystems
2011
Volume90
Issue1
Pages157-170
KeywordEutrophication 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
AbstractIn 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.
Indexed BySCI
Language英语
ISSN1385-1314
Document TypeSCI/SSCI论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/23597
Collection历年回溯文献
Recommended Citation
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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