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Variability of sediment processes around a tidal farm in a theoretical channel

Citation

Auguste, C and Nader, J-R and Marsh, P and Cossu, R and Penesis, I, Variability of sediment processes around a tidal farm in a theoretical channel, Renewable Energy, 171 pp. 606-620. ISSN 0960-1481 (2021) [Refereed Article]


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DOI: doi:10.1016/j.renene.2021.02.147

Abstract

Sediment transport plays a crucial role in coastal ecosystems and is one of the least known parameters in high energy sites. The recent development of tidal energy projects challenges the scientific community to better understand this natural phenomenon and the interactions with tidal turbines. Using MIKE21/3 software from DHI, a benchmark for sediment transport model was developed with simulations with and without a tidal farm in idealised two and three-dimensional tidal channels. Results reveal that a 2D approach is sufficient for regional scale morphological assessments, however 3D models allow for a closer examination of influences around the tidal farm. Differences in calculating sediment transport rates based on approaches after Engelund & Fredsøe and Van Rijn formulae illustrate the degree of uncertainty in modelling sediment transport rates. Results for the Engelund & Fredsøe models also show that they are sensitive to mesh resolution in equilibrium conditions and are more stable in non-equilibrium conditions for the bed level change rates. Tests have also demonstrated that models using Engelund & Fredsøe formulae are more sensitive to physical characteristics than models based on Van Rijn, accentuating the necessity to evaluate sediment transport formulae with field data before making a choice of model.

Item Details

Item Type:Refereed Article
Keywords:tidal energy, sediment transport, tidal energy converters
Research Division:Engineering
Research Group:Maritime engineering
Research Field:Ocean engineering
Objective Division:Energy
Objective Group:Renewable energy
Objective Field:Tidal energy
UTAS Author:Auguste, C (Miss Christelle Auguste)
UTAS Author:Nader, J-R (Dr Jean-Roch Nader)
UTAS Author:Marsh, P (Mr Philip Marsh)
UTAS Author:Cossu, R (Dr Remo Cossu)
UTAS Author:Penesis, I (Professor Irene Penesis)
ID Code:143864
Year Published:2021
Deposited By:NC Maritime Engineering and Hydrodynamics
Deposited On:2021-04-07
Last Modified:2021-04-07
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