Article: Nonlinear mechanism of bed load transport

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Title	Nonlinear mechanism of bed load transport
Authors	Xu, H2 Bai, Y2 Ng, CO1
Keywords	Dynamic mechanical analysis Open channel flow Sediment transport
Issue Date	2009
Publisher	Tianjin University. The Journal's web site is located at http://tjdy.chinajournal.net.cn/
Citation	Transactions Of Tianjin University, 2009, v. 15 n. 2, p. 126-129 [How to Cite?] DOI: http://dx.doi.org/10.1007/s12209-009-0022-5
Abstract	From the group movement of the bed load within the bottom layer, details of the nonlinear dynamic characteristics of bed load movement are discussed in this paper. Whether the sediment is initiated into motion corresponds to whether the constant term in the equation is equal to zero. If constant term is zero and no dispersive force is considered, the equation represents the traditional Shields initiation curve, and if constant term is zero without the dispersive force being considered, then a new Shields curve which is much lower than the traditional one is got. The fixed point of the equation corresponds to the equilibrium sediment transport of bed load. In the mutation analysis, we have found that the inflection point is the demarcation point of breaking. In theory, the breaking point corresponds to the dividing boundary line, across which the bed form changes from flat bed to sand ripple or sand dune. Compared with the experimental data of Chatou Hydraulic Lab in France, the conclusions are verified. © Tianjin University and Springer-Verlag 2009.
ISSN	1006-4982 2011 SCImago Journal Rankings: 0.029
DOI	http://dx.doi.org/10.1007/s12209-009-0022-5
References	References in Scopus

DC Field	Value
dc.contributor.author	Xu, H
dc.contributor.author	Bai, Y
dc.contributor.author	Ng, CO
dc.date.accessioned	2010-05-31T03:41:18Z
dc.date.available	2010-05-31T03:41:18Z
dc.date.issued	2009
dc.description.abstract	From the group movement of the bed load within the bottom layer, details of the nonlinear dynamic characteristics of bed load movement are discussed in this paper. Whether the sediment is initiated into motion corresponds to whether the constant term in the equation is equal to zero. If constant term is zero and no dispersive force is considered, the equation represents the traditional Shields initiation curve, and if constant term is zero without the dispersive force being considered, then a new Shields curve which is much lower than the traditional one is got. The fixed point of the equation corresponds to the equilibrium sediment transport of bed load. In the mutation analysis, we have found that the inflection point is the demarcation point of breaking. In theory, the breaking point corresponds to the dividing boundary line, across which the bed form changes from flat bed to sand ripple or sand dune. Compared with the experimental data of Chatou Hydraulic Lab in France, the conclusions are verified. © Tianjin University and Springer-Verlag 2009.
dc.description.nature	Link_to_subscribed_fulltext
dc.identifier.citation	Transactions Of Tianjin University, 2009, v. 15 n. 2, p. 126-129 [How to Cite?] DOI: http://dx.doi.org/10.1007/s12209-009-0022-5
dc.identifier.citeulike	4540714
dc.identifier.doi	http://dx.doi.org/10.1007/s12209-009-0022-5
dc.identifier.epage	129
dc.identifier.hkuros	158241
dc.identifier.issn	1006-4982 2011 SCImago Journal Rankings: 0.029
dc.identifier.issue	2
dc.identifier.openurl
dc.identifier.scopus	eid_2-s2.0-65749116614
dc.identifier.spage	126
dc.identifier.uri	http://hdl.handle.net/10722/59007
dc.identifier.volume	15
dc.language	eng
dc.publisher	Tianjin University. The Journal's web site is located at http://tjdy.chinajournal.net.cn/
dc.publisher.place	China
dc.relation.ispartof	Transactions of Tianjin University
dc.relation.references	References in Scopus
dc.subject	Dynamic mechanical analysis
dc.subject	Open channel flow
dc.subject	Sediment transport
dc.title	Nonlinear mechanism of bed load transport
dc.type	Article

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The University of Hong Kong
Tianjin University

Article: Nonlinear mechanism of bed load transport

The HKU Scholars Hub has contact details for these author(s).