Sedimentary chronology reinterpreted from Changshou Lake of the Three Gorges Reservoir Area reveals natural and anthropogenic controls on sediment production

doi:10.1007/s11356-018-1916-3

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 > 山地表生过程与生态调控重点实验室

	Sedimentary chronology reinterpreted from Changshou Lake of the Three Gorges Reservoir Area reveals natural and anthropogenic controls on sediment production
	Raheel Anjum 1,2,3; Qiang Tang1,4 ; Adrian L. Collins 4; Jinzhang Gao1 ; Yi Long1 ; Xinbao Zhang1 ; Xiubin He1 ; Zhonglin Shi1 ; Anbang Wen1 ; Jie Wei 5
刊名	ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
	2018
卷号	25 期号:18 页码:17620-17633
关键词	Human activities Sedimentary records Geochemical profile Cs-137 Dating Three Gorges Reservoir Area
ISSN号	0944-1344
DOI	10.1007/s11356-018-1916-3
通讯作者	Qiang Tang
产权排序	1
英文摘要	Sedimentary archives preserved in geomorphic sinks provide records of historical sediment dynamics and its related natural and anthropogenic controls. This study reinterpreted sedimentary processes in Changshou Lake of the Three Gorges Reservoir Area in China by combining a rainfall erosivity index with multiple tracing proxies, and the impacts of natural and anthropogenic drivers on sediment production were also explored. Erosive rainfalls with low frequency and large magnitude in the rainy season contribute to a substantial proportion of annual total rainfall, which thus can be used to infer erosion and sediment yield events. The sedimentary chronology was determined by comparing rainfall erosivity index with depth distribution of Cs-137 and absolute particle size, which revealed annual sedimentation rates ranging from 1.1 to 2.3 cm a(-1). The multi-proxy dating index and variation of sedimentation rate divided the sediment profile into three major periods. The reference period (1956-1982) displays low variability of TOC, TN, trace metal concentrations, and mean sedimentation rate. In the stressed period (1982-1998), industrial and sewerage discharge led to input and deposition of TOC, TN, and trace metals (e.g., Cd, Co, Cu, Cr, and Ni). The highest annual sediment accumulation rate of 2.3 cm a(-1) may be ascribed to the 1982 big flood event. In the present period (1998-2013), increased TOC, TN and decreased trace metals in the top layers of the sediment core indicated changes in lake ecology. Fish farming promoted algal growth and primary productivity which caused eutrophication until 2004-2005. The reduced mean sedimentation rate of 1.7 cm a(-1) between 1998 and 2004, and thereafter, may be attributed to soil and water conservation and reforestation policies implemented in the Longxi catchment. Human activities such as deforestation, cultural and industrial revolution, and lake eutrophication associated with fish farming since 1989, therefore led to appreciable limnological variations. Overall, the dated sedimentary profile from Changshou Lake displays high consistency with archived historical events and reflects the impact of both natural and anthropogenic controls on sediment production.
电子版国际标准刊号	1614-7499
语种	英语
WOS记录号	WOS:000436879200036
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/23417]
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.Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment Chinese Academy of Sciences Chengdu China; 2.University of Chinese Academy of Sciences Beijing China; 3.Abdul Wali Khan University Mardan Pakistan; 4.Sustainable Agriculture Sciences Department Rothamsted Research Okehampton UK; 5.Geography and Tourism College Chongqing Normal University Chongqing China
推荐引用方式 GB/T 7714	Raheel Anjum,Qiang Tang,Adrian L. Collins,et al. Sedimentary chronology reinterpreted from Changshou Lake of the Three Gorges Reservoir Area reveals natural and anthropogenic controls on sediment production[J]. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,2018,25(18):17620-17633.
APA	Raheel Anjum.,Qiang Tang.,Adrian L. Collins.,Jinzhang Gao.,Yi Long.,...&Jie Wei.(2018).Sedimentary chronology reinterpreted from Changshou Lake of the Three Gorges Reservoir Area reveals natural and anthropogenic controls on sediment production.ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,25(18),17620-17633.
MLA	Raheel Anjum,et al."Sedimentary chronology reinterpreted from Changshou Lake of the Three Gorges Reservoir Area reveals natural and anthropogenic controls on sediment production".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 25.18(2018):17620-17633.