Details der Publikation - Impact of the Three Gorges Dam on the Quality of Riverine Dissolved Organic Matter

Impact of the Three Gorges Dam on the Quality of Riverine Dissolved Organic Matter

Abstract The Three Gorges Dam (TGD) is the largest hydropower facility in the world, influencing the riverine hydrology and mass flux in the Yangtze River. Little is known about its impact on the riverine dissolved organic matter (DOM) quality. In this work, the water quality and DOM quality for water samples collected from the upstream and downstream sites of TGD were investigated. The presence of TGD significantly affects the quantity and quality of DOM but has no pronounced effect on nutrient concentrations. Upstream DOM had higher concentration but lower average molecular weight and aromaticity than the downstream DOM. The biological processes in the dam reservoir contribute significantly to upstream DOM. In the downstream sites, terrestrial DOM input raises the average molecular weight and aromaticity of the overall DOM pool. These results suggest that TGD will influence not only the mass flux of organic carbon but also its quality and lability, which has both environmental and ecological significance..

Medienart:	E-Artikel

Erscheinungsjahr:	2020
Erschienen:	2020

Enthalten in:	Zur Gesamtaufnahme - volume:104
Enthalten in:	Bulletin of environmental contamination and toxicology - 104(2020), 4 vom: 04. März, Seite 538-544

Sprache:	Englisch

Beteiligte Personen:	Xu, Fanchao [VerfasserIn] Chen, Liming [VerfasserIn] Xu, Yifan [VerfasserIn] Gao, Han [VerfasserIn] Cui, He [VerfasserIn] Wei, Peiyun [VerfasserIn] Qu, Xiaolei [VerfasserIn]

Links:	Volltext [lizenzpflichtig]

Themen:	DOM quality Nutrients Three gorges dam Water quality

Anmerkungen:	© Springer Science+Business Media, LLC, part of Springer Nature 2020

doi:	10.1007/s00128-020-02791-3

funding:
Förderinstitution / Projekttitel:

PPN (Katalog-ID):	OLC211727112X

Internformat


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520			\|a Abstract The Three Gorges Dam (TGD) is the largest hydropower facility in the world, influencing the riverine hydrology and mass flux in the Yangtze River. Little is known about its impact on the riverine dissolved organic matter (DOM) quality. In this work, the water quality and DOM quality for water samples collected from the upstream and downstream sites of TGD were investigated. The presence of TGD significantly affects the quantity and quality of DOM but has no pronounced effect on nutrient concentrations. Upstream DOM had higher concentration but lower average molecular weight and aromaticity than the downstream DOM. The biological processes in the dam reservoir contribute significantly to upstream DOM. In the downstream sites, terrestrial DOM input raises the average molecular weight and aromaticity of the overall DOM pool. These results suggest that TGD will influence not only the mass flux of organic carbon but also its quality and lability, which has both environmental and ecological significance.
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Impact of the Three Gorges Dam on the Quality of Riverine Dissolved Organic Matter

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