Sediment quality in the water-level-fluctuation-zone of the Three Gorges Reservoir, China

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所

	Sediment quality in the water-level-fluctuation-zone of the Three Gorges Reservoir, China
	Cao, Zhijing 1; Bao, Yuhai2
	2022
会议日期	October 11, 2012 - October 15, 2012
会议地点	Chengdu
关键词	three gorges reservoir water-level-fluctuation-zone heavy metals nutrients iment pollution extent
页码	114-121
英文摘要	The water-level-fluctuation-zone (WLFZ) of the Three Gorges Reservoir (TGR) acts as an important area for sediment and associated contaminants deposition and remobilization. Knowledge of sediment quality in the WLFZ of the TGR plays an important role in evaluating geochemical baselines and understanding human influences on sediment geochemistry. When the water level of the TGR was low in summer 2010, sediment samples in the WLFZ were collected for the determination of heavy metals (Pb, Cr, Cu, Zn, Cd), and nutrients (TP, OM). Generally, concentrations of TP and heavy metals, except for Zn, in most of the sediment samples exceeded the Lowest Effect Levels, and the maximum concentrations of these elements were below the Severe Effect Levels. The results indicated the sediments were contaminated by Cu, Cd, Pb, Cr and phosphorus to some extent. In the sediment profiles, higher concentrations of Pb, Cr, Cu, Cd and TP were associated with subsurface sediment rather than surface material. In contrast to the nutrients, the generally higher concentration of heavy metals, except for Zn, in the bulk sediments appeared in the lowland at lower elevations rather than the higher elevation sloping land. Many of the spatial trends for heavy metals and nutrients were explained by the element properties, particle-size-selective deposition and post-depositional remobilization. As sensitive indicators of contaminants in aquatic systems, the heavy metals and nutrients in the sediments in the WLFZ reflect human activities in the TGR region and have implications for environmental management. Copyright © 2012 IAHS Press.
产权排序	2
会议录	Erosion and sediment yields in the changing environment (IAHS Publ. 356)
语种	英语
ISSN号	0144-7815
ISBN号	978-1-907161-33-9
内容类型	会议论文
源URL	[http://ir.imde.ac.cn/handle/131551/23917]
专题	中国科学院水利部成都山地灾害与环境研究所
通讯作者	Cao, Zhijing
作者单位	1.College of Architecture and Environment, Sichuan University, No. 24, Yihuan Road, Chengdu, China; 2.Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, No. 9 South Renmin Road, Chengdu, China
推荐引用方式 GB/T 7714	Cao, Zhijing,Bao, Yuhai. Sediment quality in the water-level-fluctuation-zone of the Three Gorges Reservoir, China[C]. 见:. Chengdu. October 11, 2012 - October 15, 2012.