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DOI	10.1016/j.catena.2021.105614
	Optical dating of Yardang sediments and its implications for past flood events on the border of the Badain Jaran Desert, Northern China
	Yang, Hongyu; Zhao, Hui; Wang, Xingfan; Wang, Keqi; Niu, Qinghe; Zhang, Junjie; Liu, Bing
通讯作者	Zhao, H (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Desert & Desertificat, Lanzhou 730000, Peoples R China.
发表日期	2021
ISSN	0341-8162
EISSN	1872-6887
卷号	207
英文摘要	The unique landscape of numerous lakes distributed in between megadunes in the Badain Jaran Desert (BJD) has attracted much research attention. The lakes are considered to be recharged by groundwater because of the absence of surface runoff and the very limited precipitation in the region. However, the source of the groundwater and recharge mechanism for the lakes is controversial. Ancient flood sediments, indicated by the residual Yardang landforms, are distributed on the southwestern fringe of the BJD, close to the Beida and Heli Mountains which form the southwestern border of the desert. At the present day, flooding between the mountains and the BJD occurs during heavy rainfall events. Ancient river courses identified on an alluvial fan by remote sensing images interpretation revealed that the floodwater originated in the Beida and Heli Mountains. In this study we conducted optically stimulated luminescence (OSL) dating of sequences of ancient flood sediments in the BJD. The results showed that in the southern border of the BJD, flood events occurred during marine isotope stage (MIS) 7, MIS 5, and in the middle Holocene. Since the gradient of groundwater flow beneath the alluvial fan is from the Beida Mountains to the BJD, and the ground-water table responds to the local rainfall, we conclude that at least part of the groundwater of the BJD is derived from ancient and modern mountain flood events and is supplied as belowground runoff beneath the alluvial fan. The rainfall triggers flooding in the southwestern mountains, which recharges the BJD groundwater and subsequently the BJD lakes.
关键词	HIGH LAKE-LEVELS LUMINESCENCE GROUNDWATER EVOLUTION RECHARGE LOESS MECHANISMS PLATEAU
英文关键词	OSL dating; Badain Jaran Desert; Alluvial sediments; Regional floods; Groundwater recharge
语种	英语
WOS研究方向	Geology ; Agriculture ; Water Resources
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS记录号	WOS:000703268900039
来源期刊	CATENA
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/253858
作者单位	[Yang, Hongyu; Zhao, Hui; Wang, Keqi; Niu, Qinghe; Liu, Bing] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Desert & Desertificat, Lanzhou 730000, Peoples R China; [Zhao, Hui] Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China; [Yang, Hongyu; Wang, Keqi] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Wang, Xingfan] Gansu Agr Univ, Coll Water Conservancy & Hydropower Engn, Lanzhou 730070, Peoples R China; [Zhang, Junjie] Leibniz Inst Appl Geophys, D-30655 Hannover, Germany
推荐引用方式 GB/T 7714	Yang, Hongyu,Zhao, Hui,Wang, Xingfan,et al. Optical dating of Yardang sediments and its implications for past flood events on the border of the Badain Jaran Desert, Northern China[J]. 中国科学院西北生态环境资源研究院,2021,207.
APA	Yang, Hongyu.,Zhao, Hui.,Wang, Xingfan.,Wang, Keqi.,Niu, Qinghe.,...&Liu, Bing.(2021).Optical dating of Yardang sediments and its implications for past flood events on the border of the Badain Jaran Desert, Northern China.CATENA,207.
MLA	Yang, Hongyu,et al."Optical dating of Yardang sediments and its implications for past flood events on the border of the Badain Jaran Desert, Northern China".CATENA 207(2021).