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Tidal resource extraction in the Pentland Firth, UK: Potential impacts on flow regime and sediment transport in the Inner Sound of Stroma

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Title: Tidal resource extraction in the Pentland Firth, UK: Potential impacts on flow regime and sediment transport in the Inner Sound of Stroma
Authors: Martin-Short, R
Hill, J
Kramer, SC
Avdis, A
Allison, PA
Piggott, MD
Item Type: Journal Article
Abstract: Large-scale extraction of power from tidal streams within the Pentland Firth is expected to be underway in the near future. The Inner Sound of Stroma in particular has attracted significant commercial interest. To understand potential environmental impacts of the installation of a tidal turbine array a case study based upon the Inner Sound is considered. A numerical computational fluid dynamics model, Fluidity, is used to conduct a series of depth-averaged simulations to investigate velocity and bed shear stress changes due to the presence of idealised tidal turbine arrays. The number of turbines is increased from zero to 400. It is found that arrays in excess of 85 turbines have the potential to affect bed shear stress distributions in such a way that the most favourable sites for sediment accumulation migrate from the edges of the Inner Sound towards its centre. Deposits of fine gravel and coarse sand are indicated to occur within arrays of greater than 240 turbines with removal of existing deposits in the shallower channel margins also possible. The effects of the turbine array may be seen several kilometres from the site which has implications not only on sediment accumulation, but also on the benthic fauna.
Issue Date: 10-Dec-2014
Date of Acceptance: 22-Nov-2014
URI: http://hdl.handle.net/10044/1/40674
DOI: http://dx.doi.org/10.1016/j.renene.2014.11.079
ISSN: 1879-0682
Publisher: Elsevier
Start Page: 596
End Page: 607
Journal / Book Title: Renewable Energy
Volume: 76
Copyright Statement: © 2014 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/3.0/).
Sponsor/Funder: Engineering & Physical Science Research Council (E
Engineering & Physical Science Research Council (EPSRC)
Funder's Grant Number: EP/J010065/1
EP/M011054/1
Keywords: Science & Technology
Technology
GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY
Energy & Fuels
Science & Technology - Other Topics
Tidal energy
Modelling
Pentland Firth
Finite element
FINITE-ELEMENT PAIR
SEAWAY
TIDES
DYNAMICS
MODEL
OPTIMIZATION
ADAPTIVITY
PATTERNS
SCOTLAND
CHANNEL
Energy
0906 Electrical And Electronic Engineering
0913 Mechanical Engineering
Publication Status: Published
Appears in Collections:Earth Science and Engineering
Centre for Environmental Policy
Faculty of Natural Sciences



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