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The effect of floodplain roughness on flow structures, bedforms and sediment transport rates in meandering channels with overbank flows: Part I

Shiono, K.; Chan, Tony L.; Spooner, Jake; Rameshwaran, P.; Chandler, J. H.. 2009 The effect of floodplain roughness on flow structures, bedforms and sediment transport rates in meandering channels with overbank flows: Part I. Journal of Hydraulic Research, 47 (1). 5-19. 10.3826/jhr.2009.2944-I

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Abstract/Summary

Studies were carried out to understand the effect of floodplain roughness on flow structures, sediment transport rates and bedforms in a mobile meandering channel with overbank flows. Three floodplain roughnesses were examined in this study. Flow structures and bedforms were measured using a three component laser Doppler anemometer (LDA) system and digital photogrammetry, respectively. Comparisons of flow structures and bedforms between different floodplain rougheness are made. Considerable changes in the flow structure and bed form were observed. In particular, multiple secondary flow cells along the meandering channel occur at deeper water depths as the floodplain roughness increases. These cells also cause a series of wavy bedforms along the meandering channel. This paper is separated into two parts. Part I concentrates, in detail, on the flow structure with bedforms in the meandering channel for overbank flow as to change of floodplain roughness. The sister paper, Part II, concentrates on bed form formation during flood, sediment transport rates and flow resistance in the main channel and floodplain.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.3826/jhr.2009.2944-I
Programmes: CEH Programmes pre-2009 publications > Water > WA02 Quantifying processes that link water quality and quantity, biota and physical environment > WA02.2 Hydrochemical and sediment processes
CEH Sections: Acreman
ISSN: 0022-1686
NORA Subject Terms: Ecology and Environment
Earth Sciences
Electronics, Engineering and Technology
Date made live: 26 Mar 2009 14:59
URI: http://nora.nerc.ac.uk/id/eprint/6073

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