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Open Engineering

formerly Central European Journal of Engineering

Editor-in-Chief: Noor, Ahmed

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2391-5439
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Hydrodynamic investigation of fluvial sediment transport with Soil Protrusion Apparatus (SPA)

Ravindra Jayaratne
  • Corresponding author
  • Senior Lecturer in Civil Engineering, School of Architecture, Computing and Engineering, University of East London, Docklands Campus, 4-6 University Way, London E16 2RD, UK. Tel.: +44 (0)208 223 2536, fax: +44 (0)208 223 2963, E-mail: r.jayaratne@uel.ac.uk.
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/ Sarik Salim
  • PhD Candidate, School of Civil, Environmental and Mining Engineering, University of Western Australia, 35 Stirling Highway, Crawley, Perth, WA 6009, Australia. Tel.:+61 (0) 44 977 1418, E-mail: sarik.salim@research.uwa.edu.au. Formerly, MSc Student, School of Architecture, Computing and Engineering, University of East London, Docklands Campus, 4-6 University Way, London E16 2RD, UK
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Published Online: 2014-11-20 | DOI: https://doi.org/10.1515/eng-2015-0001

Abstract

In order to understand sediment transport process based on knowledge of their soil properties and hydrodynamic behaviour a series of 2D laboratory controlled small-scale experiments were conducted using the Ahlborn sediment mobile bed tank (4.0×0.6×0.2 m). Experiments were conducted in smooth and rough bed conditions with purposely-built Soil Protrusion Apparatus (SPA) to measure the basic parameters on which erosion depends. Sediment deposition patterns in equilibrium stage associated with different bed roughness and particle size distributionswere fundamentally investigated. Extended physical modelling of crescent zones also included analysing their grain size distribution. Dimensional analysis and multiple linear regression methodswere employed to derive a simple empirical relationship for erosion rate (ER) in terms of the shear stress (τs), average grain diameter (d50) and soil protrusion (z) for smooth and rough sediment bed conditions. These analyses also suggest ways to refine empirical models, examining transport rates to explore the limits of erosion and deposition influences in shallow flow conditions.

Keywords : Small-scale experiments; Smooth and rough sediment bed conditions; Deposition patterns; Dimensional analysis; Empirical relationship

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About the article

Received: 2014-05-09

Accepted: 2014-08-26

Published Online: 2014-11-20


Citation Information: Open Engineering, Volume 5, Issue 1, ISSN (Online) 2391-5439, DOI: https://doi.org/10.1515/eng-2015-0001.

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© Ravindra Jayaratne, Sarik Salim. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. BY-NC-ND 3.0

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