The effect of heterogeneous roughness on conveyance capacity and application to the Shiono-Knight method

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http://eprints.org/relation/isVersionOf http://etheses.bham.ac.uk/id/document/18970 http://eprints.org/relation/isVolatileVersionOf http://etheses.bham.ac.uk/id/document/18970 http://eprints.org/relation/isIndexCodesVersionOf http://etheses.bham.ac.uk/id/document/18970 archive 4031 disk0/00/00/32/40 2012-04-05 11:40:07 2019-01-23 09:55:50 2012-04-05 11:40:07 thesis show 0 Jesson Michael Andrew University of Birmingham The effect of heterogeneous roughness on conveyance capacity and application to the Shiono-Knight method unpub T1 TA 10col_ephy Understanding the physical processes which occur within open-channel flow is necessary if the modelling of river flow is to be improved. This thesis examines in detail the flow in a type of channel which is common in natural rivers yet little researched, the heterogeneous channel (one whose bed is laterally horizontal but of varying roughness). The 3-D velocity field in a heterogeneous channel is mapped more fully and at a higher resolution than was achieved by the few previous studies of such channels, allowing the propagation and structure of turbulence within the channel to be investigated for the first time, using techniques such as Quadrant-Hole and Conditional Time Series analysis. Two bed configurations are examined - one of full-length strip roughness (with one half of the channel width rough and the other smooth) and the second of alternating rough and smooth sections in a “checkerboard” pattern. The former allows the investigation of fully-developed flow, while the latter is shown to more closely resemble the bed variation of a natural river. The thesis goes on to provide recommendations as to how the Shiono-Knight Method (SKM) should be applied to model a heterogeneous channel, bringing the research towards a real-world application. 2012-07 2011 graduation eng author unchecked This unpublished thesis/dissertation is copyright of the author and/or third parties. The intellectual property rights of the author or third parties in respect of this work are as defined by The Copyright Designs and Patents Act 1988 or as modified by any successor legislation. Any use made of information contained in this thesis/dissertation must be in accordance with that legislation and must be properly acknowledged. Further distribution or reproduction in any format is prohibited without the permission of the copyright holder. public 336 University of Birmingham School of Engineering, Department of Civil Engineering d_ph FALSE na 2012-07 graduation