中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Spatial variation of heavy metal contamination in the riparian sediments after two-year flow regulation in the Three Gorges Reservoir, China

文献类型:期刊论文

作者Bing, Haijian1; Wu, Yanhong1; Zhou, Jun1; Sun, Hongyang1; Wang, Xiaoxiao1; Zhu, He1,2
刊名SCIENCE OF THE TOTAL ENVIRONMENT
出版日期2019-02-01
卷号649页码:1004-1016
ISSN号0048-9697
关键词Heavy metals Contamination and risk assessment Source variation Flow regulation Riparian zone Fluvial sediments
DOI10.1016/j.scitotenv.2018.08.401
英文摘要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.
语种英语
出版者ELSEVIER SCIENCE BV
WOS记录号WOS:000446076500095
源URL[http://ir.imde.ac.cn/handle/131551/23985]  
专题成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
通讯作者Wu, Yanhong
作者单位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
推荐引用方式
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.

入库方式: OAI收割

来源:成都山地灾害与环境研究所

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