Modeling increased riverine nitrogen export: Source tracking and integrated watershed-coast management

MARINE POLLUTION BULLETIN

卷:101

Article

Yu, Dan¹  Yan, Weijin²  Chen, Nengwang¹  Peng, Benrong¹  Hong, Huasheng¹  Zhuo, Guihua³ 

[1] Xiamen Univ, Coll Environm & Ecol, Fujian Prov Key Lab Coastal Ecol & Environm Studi, State Key Lab Marine Environm Sci, Xiamen 361102, Peoples R China

[2] Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China

[3] Fujian Prov Acad Environm Sci, Fuzhou 350003, Peoples R China

关键词: Dissolved inorganic nitrogen;    Eutrophication;    Coastal management;    Jiulong River;   

DOI  :  10.1016/j.marpolbul.2015.10.035

来源: Elsevier

【 摘 要 】

The global NEWS model was calibrated and then used to quantify the long term trend of dissolved inorganic nitrogen (DIN) export from two tributaries of pulong River (SE China). Anthropogenic N inputs contributed 61-92% of river DIN yield which increased from 337 in 1980s to 1662 kg N km(-2) yr(-1) in 2000s for the North River, and from 653 to 3097 kg N km-2 yr-1 for the West River. North River and West River contributed 55% and 45% respectively of DIN loading to the estuary. Rapid development and poor management driven by national policies were responsible for increasing riverine N export. Scenario analysis and source tracking suggest that reductions of anthropogenic N inputs of at least 30% in the North River (emphasis on fertilizer and manure) and 50% in the West River (emphasis on fertilizer) could significantly improve water quality and mitigate eutrophication in both river and coastal waters. (C) 2015 Elsevier Ltd. All rights reserved.

【 授权许可】

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