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	Understanding partial bed-load transport: Experiments and stochastic model analysis
	Sun H. G.; Chen, D.; Zhang, Y.; Chen, L.
	2015
关键词	Partial bed-load transport Anomalous transport Scale dependent Fractional derivative gravel-bed sediment-transport bedload transport alluvial rivers armor microforms diffusion stability streams mobile
英文摘要	The complex dynamics of partial bed-load transport in a series of well-controlled laboratory experiments are explored systematically and simulated by a stochastic model in this study. Flume experiments show that the leading front of bed-load on a 20-m-long, mixed-size gravel-bed moves anomalously, where the transient transport rate of the accelerating front varies with the observation time scale. In addition, observations show that moving particles may experience bimodal transport (i.e., coexistence of long trapping time and large jump length) related to bed coarsening and the formation of clusters on a heterogeneous gravel-bed, which is distinguished from the traditional theory of hiding-exposing interactions among mixed-size particles. A fractional derivative model is finally applied to characterize the overall behavior of partial bed-load transport, including the coexistence of the sub-diffusion and non-local feature caused by turbulence and the micro-relief within an armor layer. (C) 2014 Elsevier B.V. All rights reserved.
出处	Journal of Hydrology
卷	521
页	196-204
收录类别	SCI
语种	英语
ISSN号	0022-1694
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/38859]
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	Sun H. G.,Chen, D.,Zhang, Y.,et al. Understanding partial bed-load transport: Experiments and stochastic model analysis. 2015.

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