| 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
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| 2019-02-01 | |
| Source Publication | SCIENCE OF THE TOTAL ENVIRONMENT
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| ISSN | 0048-9697 |
| EISSN | 1879-1026 |
| Volume | 649Pages:1004-1016 |
| Subtype | Article |
| Abstract | Regular 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. |
| Keyword | Heavy metals Contamination and risk assessment Source variation Flow regulation Riparian zone Fluvial sediments |
| DOI | 10.1016/j.scitotenv.2018.08.401 |
| Indexed By | SCI |
| WOS Keyword | LEVEL-FLUCTUATION ZONE ; YELLOW-RIVER DELTA ; YANGTZE-RIVER ; RISK-ASSESSMENT ; LEAD POLLUTION ; FRESH-WATER ; ISOTOPIC GEOCHEMISTRY ; YUNNAN PROVINCE ; WETLAND SOILS ; ENRICHMENT |
| Language | 英语 |
| Quartile | 2区 |
| Funding Project | Key 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 |
| TOP | 是 |
| WOS Research Area | Environmental Sciences & Ecology |
| WOS Subject | Environmental Sciences |
| WOS ID | WOS:000446076500095 |
| Funding Organization | Key Laboratory of Mountain Surface Processes and Ecological Regulation, Youth Innovation Promotion Association ; Science and Technology Service Network Initiative ; Chinese Academy of Sciences |
| Publisher | ELSEVIER SCIENCE BV |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://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 Author | Wu, Yanhong |
| Affiliation | 1.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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| Spatial variation of（3407KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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