Migration and cutoff of meanders in the hyperarid environment of the middle Tarim River, northwestern China

doi:10.1016/j.geomorph.2016.10.018

	Migration and cutoff of meanders in the hyperarid environment of the middle Tarim River, northwestern China
	Li, Zhiwei 1; Yu, Guo-An 2; Brierley, Gary John 3; Wang, Zhaoyin 4; Jia, Yanhong 5
刊名	GEOMORPHOLOGY
	2017
卷号	276 页码:116-124
关键词	Dryland river Meandering channel Lateral migration Cutoff
ISSN号	0169-555X
DOI	10.1016/j.geomorph.2016.10.018
通讯作者	Yu, Guo-An(yuga@igsnrr.ac.cn)
英文摘要	A meandering channel has developed in the middle Tarim River, the longest inland river flowing through a hyper arid environment in northwestern China. Although the drainage basin of the Tarim River extends over 1 million km(2), flow in downstream reaches is largely restricted to summer months, and irrigation pressures have made the flood season increasingly short. The planform morphology, lateral migration rate, and cutoffs of 105 meanders were analysed using multiperiod remote sensing images and field survey analyses of channel bed and bank properties and of riparian vegetation cover. Results show that planform attributes of the meandering Tarim River are similar to those found in other environments. The ratio of the channel centreline length to the neck channel width of meanders ranges between 12 and 8.1, the bend curvature (ratio of bend radius to channel width) ranges between 0.30 and 2.8, and the average deflection angle of the bend apexes is 79.9. Meander migration rates range from 1.4 to 96.7 m y(-1). From 2000 to 2013, 45 cutoffs occurred along the 400-km-long reach. As the riparian vegetation cover is sparse because of limited precipitation and because banks are comprised of dense roots, fine sand and silt materials, but lack clay, bank strength is limited and presents limited constraints upon bend movement. (C) 2016 Elsevier B.V. All rights reserved.
资助项目	Alexander von Humboldt Foundation ; National Natural Science Foundation of China[41571009] ; National Natural Science Foundation of China[91547112] ; National Natural Science Foundation of China[91547113] ; National Natural Science Foundation of China[51309102] ; National Key R & D Plan of the Ministry of Science and Technology of the People's Republic of China[2016YFC0401401] ; National Key R & D Plan of the Ministry of Science and Technology of the People's Republic of China[2016YFC0402502] ; Research Foundation of the Education Department of Hunan Province of China[16B010]
WOS关键词	CHANNEL MIGRATION ; FLOODPLAIN EVOLUTION ; RIPARIAN VEGETATION ; BEATTON RIVER ; LOWER REACHES ; BASIN ; PLANFORM ; DYNAMICS ; BEHAVIOR ; RUNOFF
WOS研究方向	Physical Geography ; Geology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000388777800011
资助机构	Alexander von Humboldt Foundation ; National Natural Science Foundation of China ; National Key R & D Plan of the Ministry of Science and Technology of the People's Republic of China ; Research Foundation of the Education Department of Hunan Province of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/65660]
专题	中国科学院地理科学与资源研究所
通讯作者	Yu, Guo-An
作者单位	1.Changsha Univ Sci & Technol, Sch Hydraul Engn, Key Lab Water Sediment Sci & Water Disaster Preve, Changsha 410114, Hunan, Peoples R China 2.Chinese Acad Sci, Key Lab Water Cycle & Related Land Surface Proc, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 3.Univ Auckland, Sch Environm, Auckland 92019, New Zealand 4.Tsinghua Univ, State Key Lab Hydrosci & Engn, Beijing 100084, Peoples R China 5.East China Normal Univ, Shanghai 200052, Peoples R China
推荐引用方式 GB/T 7714	Li, Zhiwei,Yu, Guo-An,Brierley, Gary John,et al. Migration and cutoff of meanders in the hyperarid environment of the middle Tarim River, northwestern China[J]. GEOMORPHOLOGY,2017,276:116-124.
APA	Li, Zhiwei,Yu, Guo-An,Brierley, Gary John,Wang, Zhaoyin,&Jia, Yanhong.(2017).Migration and cutoff of meanders in the hyperarid environment of the middle Tarim River, northwestern China.GEOMORPHOLOGY,276,116-124.
MLA	Li, Zhiwei,et al."Migration and cutoff of meanders in the hyperarid environment of the middle Tarim River, northwestern China".GEOMORPHOLOGY 276(2017):116-124.