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	Scale independent linear behavior of alluvial channel flow
	Huang H. Q. ; Chang H. H.
	2006
关键词	hydraulic geometry gravel rivers least action regime streams resistance morphology vegetation stability principle
英文摘要	For flow in a rigid open channel with no bed sediment, the achievement of the special state of stationary equilibrium yields a linear characteristic. To examine the existence of a linear characteristic in alluvial channel flow, this study presents a direct formulation of the special equilibrium state following a variational approach. It finds that a linear relationship between shear stress and width/depth ratio of alluvial channels emerges under the commonly identified flow resistance and sediment transport conditions. Most importantly, this linear relationship yields not only the theoretical equilibrium channel geometry that is very close to a widely identified empirical counterpart but also a nondimensional number H, defined as the ratio of the relative increment of shear stress to the increment of width/depth ratio. This study suggests that H needs to be adopted as a criterion of hydraulic similitude for modeling sediment (bed-load) transport in alluvial channels.
出处	Journal of Hydraulic Engineering-Asce
卷	132
期	7
页	722-730
收录类别	SCI
语种	英语
ISSN号	0733-9429
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/23832]
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	Huang H. Q.,Chang H. H.. Scale independent linear behavior of alluvial channel flow. 2006.

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