气候变化领域集成服务门户(CCPortal): Delayed neck cutoff in the meandering Black River of the Qinghai-Tibet plateau

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DOI	10.1002/esp.5534
	Delayed neck cutoff in the meandering Black River of the Qinghai-Tibet plateau
	Li, Zhiwei; Gao, Peng; You, Yuchi; Finotello, Alvise; Ielpi, Alessandro
发表日期	2023
ISSN	0197-9337
EISSN	1096-9837
起始页码	1052
结束页码	1063
卷号	48 期号:5
英文摘要	Neck cutoffs in meandering rivers have long been thought to occur when the neck width (b) approximates the mean width of the parent channel (W). Empirical evidence for this paradigm is scarce, however, because tracking late-stage evolution of meander bends prior to cutoff at sufficient temporal resolutions is difficult in natural rivers. In this study, we captured field and photogrammetric data depicting temporal changes of the banklines forming the neck of one meander bend, and values of the narrowest neck width for 14 highly sinuous bends, in the Black River of the Qinghai-Tibet Plateau (China) over nearly four decades. Results show that the duration of bend evolution from the classic morphological threshold (b approximate to W) to the occurrence of neck cutoff could range from 52 to 161 years. This long period has hitherto been ignored by fluvial geomorphologists, and needs to be included in forthcoming kinematic and hydrodynamic models of meander evolution. Further analyses indicate that the neck narrowing process is autogenous at the local bend scale, neither controlled by the maximum bend sinuosity nor by the annual peak discharge.
关键词	bend sinuosity Meandering river neck cutoff peak discharge remotely sensed images
英文关键词	CHANNEL ADJUSTMENT; FLOW STRUCTURE; MIGRATION; SIMULATION; MORPHODYNAMICS; CURVATURE; SINUOSITY; EVOLUTION; DYNAMICS
WOS研究方向	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000908214100001
来源期刊	EARTH SURFACE PROCESSES AND LANDFORMS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283055
作者单位	Wuhan University; Syracuse University; Changsha University of Science & Technology; University of Padua; University of British Columbia; University of British Columbia Okanagan; Syracuse University
推荐引用方式 GB/T 7714	Li, Zhiwei,Gao, Peng,You, Yuchi,et al. Delayed neck cutoff in the meandering Black River of the Qinghai-Tibet plateau[J],2023,48(5).
APA	Li, Zhiwei,Gao, Peng,You, Yuchi,Finotello, Alvise,&Ielpi, Alessandro.(2023).Delayed neck cutoff in the meandering Black River of the Qinghai-Tibet plateau.EARTH SURFACE PROCESSES AND LANDFORMS,48(5).
MLA	Li, Zhiwei,et al."Delayed neck cutoff in the meandering Black River of the Qinghai-Tibet plateau".EARTH SURFACE PROCESSES AND LANDFORMS 48.5(2023).