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	Evaluating secondary flows in the evolution of sine-generated meanders
	Chen D.
	2012
关键词	Meander Secondary flow Bank erosion Sediment transport Model riverbank-stability analysis curved open channels bed topography shear-stress bend theory model simulation migration redistribution planform
英文摘要	The development of meanders has been the focus of research for decades because the shifting of bank lines may potentially cause serious problems in river engineering. This study assesses the roles of secondary flows in meander evolution by testing two model parameters, A and As, which represent the effects of momentum redistribution exerted by the topography-driven and curvature-driven secondary currents, respectively. The meander-evolution model couples an analytical solution of flow field in a sine-generated channel with the Bank Erosion and Retreat Model (BERM). The contributions of this study lie in two areas. First, the authors isolated and quantified the roles of curvature-driven and topography-driven secondary flows in meander evolution. Second, the shifting processes of primary flow by secondary flows were investigated in detail by evaluating various variations of the dimensionless scour factor A. (C) 2012 Elsevier B.V. All rights reserved.
出处	Geomorphology
卷	163
页	37-44
收录类别	SCI
语种	英语
ISSN号	0169-555X
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/26959]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Chen D.. Evaluating secondary flows in the evolution of sine-generated meanders. 2012.

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