On evolution of bed material waves in alluvial rivers
Cao, Z. and Carling, P.A. (2003) On evolution of bed material waves in alluvial rivers. Earth Surface Processes and Landforms, 28, 437-441. (doi:10.1002/esp.493).
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Field and laboratory measurements have shown distinct characteristics of bed sediment waves under differing conditions, whilst their theoretical interpretation has emerged to be equivocal. This note aims to clarify the interpretation of evolution of bed material waves. The complete set of governing equations for the flow-sediment-morphology system is deduced to demonstrate its universally hyperbolic nature, irrespective of the sediment transport functions implemented to close the equations. The hyperbolic nature can admit not only attenuating bed material waves, but also shock-like waves that are not unusual in the real world. It is suggested that the theory of dispersion/diffusion is not universally appropriate for evolution of bed material waves.
|Digital Object Identifier (DOI):||doi:10.1002/esp.493|
|Keywords:||Sediment transport, alluvial rivers, bed material wave, hyperbolic equations, dispersion|
|Subjects:||G Geography. Anthropology. Recreation > G Geography (General)|
|Divisions:||University Structure - Pre August 2011 > School of Geography > Environmental Processes and Change
|Date Deposited:||24 Feb 2005|
|Last Modified:||06 Aug 2015 02:15|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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