IMHE OpenIR  > 山地表生过程与生态调控重点实验室
Spatial variation of heavy metal contamination in the riparian sediments after two-year flow regulation in the Three Gorges Reservoir, China
Bing, Haijian1; Wu, Yanhong1; Zhou, Jun1; Sun, Hongyang1; Wang, Xiaoxiao1; Zhu, He1,2
2019-02-01
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
Volume649Pages:1004-1016
AbstractRegular impoundment of the Three Gorges Reservoir (TGR) with intensified human activities in the watershed imparts a significant effect on the environmental changes in the riparian zone. In this study, six heavy metals (Cd, Cr, Cu, Ni, Pb and Zn) in the riparian sediments of the entire TGR mainstream were investigated in 2014 and 2016 to identify their contamination and risk characteristics and decipher the main factors for the variation of the metal contamination. The results showed that the concentrations of the heavy metals in the sediments did not vary significantly between 2014 and 2016, and their contamination degrees decreased in the order of Cd> > Cu approximate to Zn > Pb > Cr approximate to Ni in 2014 and Cd> > Zn > Cu approximate to Pb > Cr approximate to Ni in 2016. The potential eco-risk of Cd was extremely high in the two years, while the eco-risk of other metals was very low. The sediments showed a moderate to high contamination level, a high potential eco-risk but a low toxic risk to aquatic biota in the two years. Spatially, the contamination and risk levels of heavy metals were relatively higher in the downstream TGR region in 2014 except for the sites close to the urban areas but in the upper-middle TGR region in 2016. Increasing anthropogenic influence contributed to the high contamination and risk levels of Cd, Cu, Pb and Zn in the upper-middle region in 2016. The results indicated that the Cd contamination in the riparian sediments of the TGR was still a vital environmental issue, and the decreased sediment inputs from the upstream major tributaries, the periodic and anti-seasonal flow regulation, local geomorphological characteristics and anthropogenic activities determined the contamination distribution of heavy metals in the riparian sediments. (C) 2018 Elsevier B.V. All rights reserved.
KeywordHeavy metals Contamination and risk assessment Source variation Flow regulation Riparian zone Fluvial sediments
DOI10.1016/j.scitotenv.2018.08.401
WOS KeywordLEVEL-FLUCTUATION ZONE ; YELLOW-RIVER DELTA ; YANGTZE-RIVER ; RISK-ASSESSMENT ; LEAD POLLUTION ; FRESH-WATER ; ISOTOPIC GEOCHEMISTRY ; YUNNAN PROVINCE ; WETLAND SOILS ; ENRICHMENT
Language英语
Funding ProjectKey Laboratory of Mountain Surface Processes and Ecological Regulation, Youth Innovation Promotion Association[2017424] ; Science and Technology Service Network Initiative[KFJ-EW-STS-008] ; Chinese Academy of Sciences
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000446076500095
Funding OrganizationKey Laboratory of Mountain Surface Processes and Ecological Regulation, Youth Innovation Promotion Association ; Science and Technology Service Network Initiative ; Chinese Academy of Sciences
PublisherELSEVIER SCIENCE BV
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Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/23985
Collection山地表生过程与生态调控重点实验室
Corresponding AuthorWu, Yanhong
Affiliation1.Chinese Acad Sci, Key Lab Mt Surface Proc & Ecol Regulat, Inst Mt Hazards & Environm, Chengdu 610041, Sichuan, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Corresponding Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Bing, Haijian,Wu, Yanhong,Zhou, Jun,et al. Spatial variation of heavy metal contamination in the riparian sediments after two-year flow regulation in the Three Gorges Reservoir, China[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,649:1004-1016.
APA Bing, Haijian,Wu, Yanhong,Zhou, Jun,Sun, Hongyang,Wang, Xiaoxiao,&Zhu, He.(2019).Spatial variation of heavy metal contamination in the riparian sediments after two-year flow regulation in the Three Gorges Reservoir, China.SCIENCE OF THE TOTAL ENVIRONMENT,649,1004-1016.
MLA Bing, Haijian,et al."Spatial variation of heavy metal contamination in the riparian sediments after two-year flow regulation in the Three Gorges Reservoir, China".SCIENCE OF THE TOTAL ENVIRONMENT 649(2019):1004-1016.
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