气候变化领域集成服务门户(CCPortal): The impact of the Three Gorges Dam on the fate of metal contaminants across the river-ocean continuum

CCPortal

DOI	10.1016/j.watres.2020.116295
	The impact of the Three Gorges Dam on the fate of metal contaminants across the river-ocean continuum
	Liu, Maodian; He, Yipeng; Baumann, Zofia; Zhang, Qianru; Jing, Xin; Mason, Robert P.; Xie, Han; Shen, Huizhong; Chen, Long; Zhang, Wei; Zhang, Qianggong; Wang, Xuejun
通讯作者	Wang, XJ (通讯作者)
发表日期	2020
ISSN	0043-1354
卷号	185
英文摘要	The Three Gorges Dam (TGD) is the world's largest hydropower construction. It can significantly impact contaminant transport in the Yangtze River-East China Sea Continuum (YR-ECSC). In addition to evaluating the impact of the TGD on the deposition of contaminants in the reservoir, we also address their cycles in the river below the dam and in the coastal East China Sea. A comprehensive study of metal contaminant transport along the YR-ECSC has not been previously attempted. We quantified the fates of mercury (Hg), arsenic (As), lead (Pb), cadmium (Cd) and chromium (Cr) within the YR-ECSC, and the impacts of the TGD, by sampling water and suspended particles along the Yangtze River during spring, summer, fall, and winter and by modeling. We found that the Yangtze River transports substantial amounts of heavy metals into the coastal ocean. In 2016, riverine transport amounted to 48, 5900, 11,000, 230, and 15,000 megagrams (Mg) for Hg, As, Pb, Cd, and Cr, respectively, while other terrestrial contributions were negligible. Metal flux into the coastal ocean was primarily derived from the downstream portion of the river (84-97%), while metals transported from upstream were largely trapped in the Three Gorges Reservoir (TGR, 72%-96%). For example, 34 Mg of Hg accumulated in the TGR owing to river damming, large-scale soil erosion, and anthropogenic point source releases, while 21 Mg of Hg was depleted from the riverbed downstream owing to the altered river hydrology caused by the TGD. Overall the construction of TGD resulted in a 6.9% net decrease in the Hg burden of the East China Sea, compared to the pre-TGD period. (c) 2020 Elsevier Ltd. All rights reserved.
关键词	EAST CHINA SEA HEAVY-METAL MERCURY EMISSIONS YANGTZE-RIVER ANTHROPOGENIC SOURCES TRACE-METALS WATER METHYLMERCURY SEDIMENTS DOWNSTREAM
英文关键词	River damming; River-ocean continuum; Downstream hydrological impact; Contaminant accumulation and resuspension; Soil erosion
语种	英语
WOS研究方向	Engineering ; Environmental Sciences & Ecology ; Water Resources
WOS类目	Engineering, Environmental ; Environmental Sciences ; Water Resources
WOS记录号	WOS:000580639800102
来源期刊	WATER RESEARCH
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260094
推荐引用方式 GB/T 7714	Liu, Maodian,He, Yipeng,Baumann, Zofia,et al. The impact of the Three Gorges Dam on the fate of metal contaminants across the river-ocean continuum[J]. 中国科学院青藏高原研究所,2020,185.
APA	Liu, Maodian.,He, Yipeng.,Baumann, Zofia.,Zhang, Qianru.,Jing, Xin.,...&Wang, Xuejun.(2020).The impact of the Three Gorges Dam on the fate of metal contaminants across the river-ocean continuum.WATER RESEARCH,185.
MLA	Liu, Maodian,et al."The impact of the Three Gorges Dam on the fate of metal contaminants across the river-ocean continuum".WATER RESEARCH 185(2020).