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Sedimentation and associated trace metal enrichment in the riparian zone of the Three Gorges Reservoir, China
Tang, Qiang1,2; Bao, Yuhai1; He, Xiubin1; Zhou, Huaidong3; Cao, Zhijing4; Gao, Peng5; Zhong, Ronghua1,2; Hu, Yunhua1,2; Zhang, Xinbao1
Corresponding AuthorXiubin He
AbstractImpoundment of the Three Gorges Reservoir has created an artificial riparian zone with a vertical height of 30 m and a total area of 349 km(2), which has been subjected to seasonal inundation and exposure due to regular reservoir impoundment and the occurrence of natural floods. The significant alteration of hydrologic regime has caused numerous environmental changes. The present study investigated the magnitude and spatial pattern of sedimentation and metal enrichment in a typical section of the riparian zone, composed of bench terraces with previous agricultural land uses, and explored their links to the changed hydrologic regime. In particular, we measured the total sediment depths and collected surface riparian sediments and down-profile sectioned riparian soils (at 5 cm intervals) for trace metal determination. Our analysis showed that the annual average sedimentation rates varied from 0.5 to 10 cm.yr(-1) and they decreased significantly with increasing elevation. This lateral distribution was principally attributed to seasonal variations in water levels and suspended sediment concentrations. Enriched concentrations of trace metals were found both in the riparian sediments and soils, but they were generally higher in the riparian sediments than in riparian soils and followed a similar lateral decreasing trend. Metal contamination assessment showed that the riparian sediments were slightly contaminated by Ni, Zn, and Pb, moderately contaminated by Cu, and moderately to strongly contaminated by Cd; while riparian soils were slightly contaminated by As, and moderately contaminated by Cd. Trace metal enrichment in the riparian sediments may be attributed to external input of contaminated sediments produced from upstream anthropogenic sources and chemical adsorption from dissolved fractions during pure sediment mobilization and after sink for a prolonged flooding period due to reservoir impoundment. (C) 2014 Elsevier B.V. All rights reserved.
KeywordSedimentation Trace Metal Diffuse Contaminant Riparian Zone Three Gorges Reservoir
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
WOS Subject ExtendedEnvironmental Sciences & Ecology
Indexed BySCI
WOS SubjectEnvironmental Sciences
WOS IDWOS:000334006700030
Funding OrganizationNational Natural Science Foundation of China(41171222 ; Chinese Academy of Sciences(KZCX2-XB3-09) ; 41201272)
Citation statistics
Cited Times:87[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.China Inst Water Resources & Hydrol Res, Water Environm Dept, Beijing 100038, Peoples R China
4.Sichuan Univ, Coll Architecture & Environm, Chengdu 610065, Peoples R China
5.Syracuse Univ, Dept Geog, Syracuse, NY 13244 USA
First 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
Tang, Qiang,Bao, Yuhai,He, Xiubin,et al. Sedimentation and associated trace metal enrichment in the riparian zone of the Three Gorges Reservoir, China[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2014,479:258-266.
APA Tang, Qiang.,Bao, Yuhai.,He, Xiubin.,Zhou, Huaidong.,Cao, Zhijing.,...&Zhang, Xinbao.(2014).Sedimentation and associated trace metal enrichment in the riparian zone of the Three Gorges Reservoir, China.SCIENCE OF THE TOTAL ENVIRONMENT,479,258-266.
MLA Tang, Qiang,et al."Sedimentation and associated trace metal enrichment in the riparian zone of the Three Gorges Reservoir, China".SCIENCE OF THE TOTAL ENVIRONMENT 479(2014):258-266.
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