New insights into dating the sediment sequence within a landslide-dammed reservoir on the Chinese Loess Plateau

doi:10.1177/0959683619831426

IEECAS OpenIR > 加速器质谱中心

	New insights into dating the sediment sequence within a landslide-dammed reservoir on the Chinese Loess Plateau
	Wang, Xiaqing 1,2,3; Jin, Zhangdong 2; He, Zhong 4; Zhou, Ling 5; Xu, Jianwei 1
通讯作者	Wang, Xiaqing(wangxq1517@hotmail.com)
	2019-06-01
发表期刊	HOLOCENE
ISSN	0959-6836
卷号	29 期号:6 页码:1020-1029
摘要	The deposition couplets within the check dams and landslide-dammed reservoirs on the Chinese Loess Plateau (CLP) document the processes and histories of watershed soil erosion, transportation and deposition, related to floods, eco-environment and land use changes, and human activities. Previously, dating the couplets was dominantly dependent on multiple intercomparisons among specific sediment yields of visible couplets, Cs-137 activities distributions and erosive rainfall events by meteorological records. However, inter-annual division of the deposition couplets and dating historical sequence beyond meteorological records in the landslide-dammed reservoir are little known. Based on high-resolution XRF core scanning on a 22.75 m sediment sequence in Jingbian (JB) landslide-dammed reservoir on the central hilly-gully area of the CLP, and cross checking of multiple dating methods, this study tried to propose a new method to build the accurate chronology sequence based on inter-annual division by annual freeze-thaw layer and to further date the sediment without rainfall records. The results showed that a total of 126 deposition couplets and 78 annual freeze-thaw layers were identified in the JB sequence. Multimethod cross-dating, including Cs-137 activities, annual freeze-thaw layers, couplet specific sediment yield and modern rainfall records, was the most accurate method of dating the JB sediment sequences since 1960s with detail meteorological records. Furthermore, the correspondence between annual freeze-thaw layers and the historical grades of flood index from literature was the valid method to date the JB historical sequences without rainfall records. Consequently, the JB sequence was deposited during the period between 1855 and 2014. High-resolution dating of the JB sequence provides the chronology for recovering natural and anthropogenic information on the central hilly-gully area of CLP since 1850s. The proposed methods will also shed new light on the accurate dating of the sediment sequences within other check dams and landslide-dammed reservoirs on the central and northern CLP.
关键词	Cs-137 activity annual freeze-thaw layer check dam and landslide-dammed reservoir Chinese Loess Plateau flood index grade rainfall record
DOI	10.1177/0959683619831426
关键词[WOS]	CHECK-DAMS ; YELLOW-RIVER ; LAND-USE ; EROSION ; YIELD ; CATCHMENT ; DEPOSITION ; RETENTION ; DISCHARGE ; RUNOFF
收录类别	SCI ; SCI
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000485295500007
出版者	SAGE PUBLICATIONS LTD
引用统计	被引频次：5[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/13310
专题	加速器质谱中心
通讯作者	Wang, Xiaqing
作者单位	1.Hunan Univ Arts & Sci, Coll Resources & Environm & Tourism, 3150 Dongting Ave, Changde 415000, Peoples R China 2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Beijing, Peoples R China 3.Hunan Prov Cooperat Innovat Ctr Construct & Dev D, Changde, Peoples R China 4.Chinese Acad Sci, Inst Soil & Water Conservat, Beijing, Peoples R China 5.Xingtai Univ, Coll Resources & Environm, Xingtai, Peoples R China
推荐引用方式 GB/T 7714	Wang, Xiaqing,Jin, Zhangdong,He, Zhong,et al. New insights into dating the sediment sequence within a landslide-dammed reservoir on the Chinese Loess Plateau[J]. HOLOCENE,2019,29(6):1020-1029.
APA	Wang, Xiaqing,Jin, Zhangdong,He, Zhong,Zhou, Ling,&Xu, Jianwei.(2019).New insights into dating the sediment sequence within a landslide-dammed reservoir on the Chinese Loess Plateau.HOLOCENE,29(6),1020-1029.
MLA	Wang, Xiaqing,et al."New insights into dating the sediment sequence within a landslide-dammed reservoir on the Chinese Loess Plateau".HOLOCENE 29.6(2019):1020-1029.