DOI: 10.1016/j.watres.2018.07.004
Scopus记录号: 2-s2.0-85051179097
论文题名: Significant chemical fluxes from natural terrestrial groundwater rival anthropogenic and fluvial input in a large-river deltaic estuary
作者: Luo X. ; Jiao J.J. ; Moore W.S. ; Cherry J.A. ; Wang Y. ; Liu K.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 144 起始页码: 603
结束页码: 615
语种: 英语
英文关键词: Ammonium
; Radium
; Reactive transport model
; Terrestrial groundwater discharge
; The large river delta-front estuary (LDE) of Pearl River
Scopus关键词: Aquifers
; Discharge (fluid mechanics)
; Estuaries
; Eutrophication
; Gems
; Groundwater resources
; Hydrogeology
; Radium
; Rivers
; Sulfur compounds
; Ammonium
; Anthropogenic inputs
; Ground water discharge
; Pearl River
; Pearl River estuary
; Reactive transport modeling
; Reducing environment
; Sulfate reduction
; River pollution
; ammonia
; ground water
; organic matter
; radium
; stable isotope
; sulfate
; ammonium
; anoxic conditions
; anthropogenic source
; chemical analysis
; delta
; discharge
; estuarine front
; eutrophication
; freshwater input
; groundwater pollution
; organic matter
; radium
; reactive transport
; aquifer
; Article
; chemical parameters
; ecosystem
; estuary
; eutrophication
; priority journal
; reduction (chemistry)
; seashore
; trophic level
; urbanization
; China
; Guangdong
; Zhujiang Estuary
英文摘要: The shores of the Pearl River estuary are home to 35 million people. Their wastes are discharged into the large river delta-front estuary (LDE), one of the most highly polluted systems in the world. Here we construct a radium reactive transport model to estimate the terrestrial groundwater discharge (TGD) into the highly urbanized Pearl River LDE. We find the TGD comprises only approximately 0.9% in term of water discharge compared to the river discharge. The TGD in the Pearl River LDE delivers significant chemical fluxes to the coast, which are comparable to the fluvial loadings from Pearl River and other world major rivers. Of particular importance is the flux of ammonium because of its considerable role in Pearl River estuary eutrophication and hypoxia. Unlike the ammonium in many other aquifers, the ammonium in the Pearl River aquifer system is natural and originated from organic matter remineralization by sulfate reduction in the extremely reducing environment. The TGD derived NH4 + is as much as 5% of the upstream Pearl River fluvial loading and 42% of the anthropogenic inputs. This high groundwater NH4 + flux may greatly intensify the eutrophication, shift the trophic states, and lead to alarming hypoxia within the affected ecosystems in the Pearl River LDE. The large TGD derived chemical fluxes will lead to deterioration of water and will potentially affect human health. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112509
Appears in Collections: 气候减缓与适应
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作者单位: Department of Earth Sciences, The University of Hong Kong, Hong Kong; The University of Hong Kong, Shenzhen Research Institute (SRI), Shenzhen, Hong Kong; The University of Hong Kong-Zhejiang Institute of Research and Innovation (HKU-ZIRI), Hangzhou, Hong Kong; Department of Earth and Ocean Sciences, University of South Carolina, Columbia, SC 29208, United States; School of Engineering, University of Guelph, Guelph, ON N1G 2W1, Canada; School of Earth Science and Geological Engineering, Sun Yat-sen University Guangzhou510275, China; China Institute of Geo-Environment Monitoring, China Geological Survey, China
Recommended Citation:
Luo X.,Jiao J.J.,Moore W.S.,et al. Significant chemical fluxes from natural terrestrial groundwater rival anthropogenic and fluvial input in a large-river deltaic estuary[J]. Water Research,2018-01-01,144