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Sedimentation and associated trace metal enrichment in the riparian zone of the Three Gorges Reservoir, China

文献类型:期刊论文

作者Tang, Qiang1,2; Bao, Yuhai1; He, Xiubin1; Zhou, Huaidong3; Cao, Zhijing4; Gao, Peng5; Zhong, Ronghua1,2; Hu, Yunhua1,2; Zhang, Xinbao1
刊名SCIENCE OF THE TOTAL ENVIRONMENT
出版日期2014-05-01
卷号479页码:258-266
ISSN号0048-9697
关键词Sedimentation Trace metal Diffuse contaminant Riparian zone Three Gorges Reservoir
通讯作者Xiubin He
英文摘要Impoundment 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.
WOS标题词Science & Technology ; Life Sciences & Biomedicine
类目[WOS]Environmental Sciences
研究领域[WOS]Environmental Sciences & Ecology
关键词[WOS]LEVEL-FLUCTUATION ZONE ; SPATIAL-PATTERNS ; ORGANIC-MATTER ; RIVER ; VEGETATION ; POLLUTION ; REGION ; CONTAMINATION ; FLOODPLAINS ; TRANSPORT
收录类别SCI
语种英语
WOS记录号WOS:000334006700030
公开日期2014-02-28
源URL[http://ir.imde.ac.cn/handle/131551/6835]  
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
作者单位1.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
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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.

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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