DOI: 10.1016/j.gloplacha.2013.03.005
论文题名: Assessing dissolved inorganic nitrogen flux in the Yangtze River, China: Sources and scenarios
作者: Xu H. ; Chen Z. ; Finlayson B. ; Webber M. ; Wu X. ; Li M. ; Chen J. ; Wei T. ; Barnett J. ; Wang M.
刊名: Global and Planetary Change
ISSN: 0921-8285
出版年: 2013
卷: 106 起始页码: 84
结束页码: 89
语种: 英语
英文关键词: DIN-sources
; Dissolved inorganic nitrogen (DIN)
; Freshwater
; Yangtze River basin
Scopus关键词: DIN-sources
; Dissolved inorganic nitrogens
; Freshwater
; Gauging stations
; Principal components analysis
; Treatment systems
; Yangtze river , China
; Yangtze River basin
; Digital storage
; Dissolution
; Manures
; Nitrogen fertilizers
; Potable water
; Principal component analysis
; Rivers
; Sewage
; Sewage treatment
; Water pollution
; Watersheds
; Nitrogen
; concentration (composition)
; dissolved inorganic nitrogen
; estimation method
; estuarine pollution
; megacity
; pollution control
; river basin
; river pollution
; China
; Datong
; Shanxi
; Yangtze River
英文摘要: This study gives a thorough assessment of the occurrences of dissolved inorganic nitrogen (DIN) in the Yangtze River in the past half century. The results have shown that nitrogen fertilizer, a major DIN source, has been replaced by domestic sewage in the last decade, which has dramatically driven up DIN loads in the Yangtze. DIN concentrations showed a rapid increase from <0.5mgL-1 in the 1960s to nearly 1.5mgL-1 at the end of the 1990s. Since then DIN has remained steady at ca. 1.6-1.8mgL-1. A significant relationship between the historical DIN record at the downstream gauging station (Datong) and nitrogen (N) sources in the Yangtze River basin is established using principal components analysis. This allows us to apportion DIN loads for the year 2007 (the most recent year of measured DIN data available) to various N sources, listed here in order of weight: sewage (0.391million tons); atmosphere (0.358million tons); manure (0.318million tons), N-fertilizer (0.271million tons). Therefore, we estimated that a DIN load of 1.339×106t was delivered to the lower Yangtze and its estuarine water in that year. We established scenarios to predict DIN concentrations in the lower Yangtze at 10year intervals to 2050. For a dry year (20,000m3s-1) DIN concentrations would range from 2.2-3.0mgL-1 for 2020-2050. This far exceeds the 2.0mgL-1 defined on the Chinese National Scale as the worst class for potable source water. The scenario results suggest that upgrading the sewage treatment systems throughout the basin will be an effective way to help reduce DIN concentrations to less than 2.0mgL-1 in the lower Yangtze. This would save the Shanghai megacity from the increasing threat of heavily polluted water sources, where >23million people are at present dependent on the Yangtze estuary for 70% of their freshwater intake. © 2013 Elsevier B.V. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84876427107&doi=10.1016%2fj.gloplacha.2013.03.005&partnerID=40&md5=bc3f1160e84ac938416ccffdbda3abc0
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/11191
Appears in Collections: 全球变化的国际研究计划
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作者单位: Department of Geography, East China Normal University, Shanghai 200062, China
Recommended Citation:
Xu H.,Chen Z.,Finlayson B.,et al. Assessing dissolved inorganic nitrogen flux in the Yangtze River, China: Sources and scenarios[J]. Global and Planetary Change,2013-01-01,106.