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The influence of waves on morphodynamic impacts of energy extraction at a tidal stream turbine site in the Pentland Firth

Iain Fairley, Harshinie Karunarathna Orcid Logo, Ian Masters Orcid Logo

Renewable Energy, Volume: 125, Pages: 630 - 647

Swansea University Authors: Iain Fairley, Harshinie Karunarathna Orcid Logo, Ian Masters Orcid Logo

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DOI (Published version): 10.1016/j.renene.2018.02.035

Abstract

Extraction of energy from tidal streams has the potential to impact on the morphodynamics of areas such as sub-tidal sandbanks via alteration of hydrodynamics. Marine sediment transport is forced by both wave and tidal currents. Past work on tidal stream turbine impacts has largely ignored the contr...

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Published in: Renewable Energy
ISSN: 0960-1481
Published: 2018
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URI: https://cronfa.swan.ac.uk/Record/cronfa38415
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spelling 2021-01-14T13:27:46.3596517 v2 38415 2018-02-08 The influence of waves on morphodynamic impacts of energy extraction at a tidal stream turbine site in the Pentland Firth 568e6f260489dc8139afe77757553513 Iain Fairley Iain Fairley true false 0d3d327a240d49b53c78e02b7c00e625 0000-0002-9087-3811 Harshinie Karunarathna Harshinie Karunarathna true false 6fa19551092853928cde0e6d5fac48a1 0000-0001-7667-6670 Ian Masters Ian Masters true false 2018-02-08 FGSEN Extraction of energy from tidal streams has the potential to impact on the morphodynamics of areas such as sub-tidal sandbanks via alteration of hydrodynamics. Marine sediment transport is forced by both wave and tidal currents. Past work on tidal stream turbine impacts has largely ignored the contribution of waves. Here, a fully coupled hydrodynamic, spectral wave and sediment transport model is used to assess the importance of including waves in simulations of turbine impact on seabed morphodynamics. Assessment of this is important due to the additional expense of including waves in simulations. Focus is given to a sandbank in the Inner Sound of the Pentland Firth. It is found that inclusion of wave action alters hydrodynamics, although extent of alteration is dependant of wave direction. Magnitude of sediment transport is increased when waves are included in the simulations and this has implications for morphological and volumetric changes. Volumetric changes are substantially increased when wave action is included: the impact of including waves is greater than the impact of including tidal stream turbines. Therefore it is recommended that at tidal turbine array sites exposed to large swell or wind-seas, waves should be considered for inclusion in simulations of physical impact. Journal Article Renewable Energy 125 630 647 0960-1481 Tidal stream turbines; Environmental impact assessment; Waves; Morphodynamics; Numerical modelling; Pentland Firth 1 9 2018 2018-09-01 10.1016/j.renene.2018.02.035 COLLEGE NANME Science and Engineering - Faculty COLLEGE CODE FGSEN Swansea University RCUK, EP/K012851/1 2021-01-14T13:27:46.3596517 2018-02-08T09:43:20.5165020 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering Iain Fairley 1 Harshinie Karunarathna 0000-0002-9087-3811 2 Ian Masters 0000-0001-7667-6670 3 0038415-20032018140846.pdf 38415.pdf 2018-03-20T14:08:46.0670000 Output 12083464 application/pdf Version of Record true Released under the terms of a Creative Commons Attribution License (CC-BY). true eng http://creativecommons.org/licenses/by/4.0/
title The influence of waves on morphodynamic impacts of energy extraction at a tidal stream turbine site in the Pentland Firth
spellingShingle The influence of waves on morphodynamic impacts of energy extraction at a tidal stream turbine site in the Pentland Firth
Iain Fairley
Harshinie Karunarathna
Ian Masters
title_short The influence of waves on morphodynamic impacts of energy extraction at a tidal stream turbine site in the Pentland Firth
title_full The influence of waves on morphodynamic impacts of energy extraction at a tidal stream turbine site in the Pentland Firth
title_fullStr The influence of waves on morphodynamic impacts of energy extraction at a tidal stream turbine site in the Pentland Firth
title_full_unstemmed The influence of waves on morphodynamic impacts of energy extraction at a tidal stream turbine site in the Pentland Firth
title_sort The influence of waves on morphodynamic impacts of energy extraction at a tidal stream turbine site in the Pentland Firth
author_id_str_mv 568e6f260489dc8139afe77757553513
0d3d327a240d49b53c78e02b7c00e625
6fa19551092853928cde0e6d5fac48a1
author_id_fullname_str_mv 568e6f260489dc8139afe77757553513_***_Iain Fairley
0d3d327a240d49b53c78e02b7c00e625_***_Harshinie Karunarathna
6fa19551092853928cde0e6d5fac48a1_***_Ian Masters
author Iain Fairley
Harshinie Karunarathna
Ian Masters
author2 Iain Fairley
Harshinie Karunarathna
Ian Masters
format Journal article
container_title Renewable Energy
container_volume 125
container_start_page 630
publishDate 2018
institution Swansea University
issn 0960-1481
doi_str_mv 10.1016/j.renene.2018.02.035
college_str Faculty of Science and Engineering
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hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering
document_store_str 1
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description Extraction of energy from tidal streams has the potential to impact on the morphodynamics of areas such as sub-tidal sandbanks via alteration of hydrodynamics. Marine sediment transport is forced by both wave and tidal currents. Past work on tidal stream turbine impacts has largely ignored the contribution of waves. Here, a fully coupled hydrodynamic, spectral wave and sediment transport model is used to assess the importance of including waves in simulations of turbine impact on seabed morphodynamics. Assessment of this is important due to the additional expense of including waves in simulations. Focus is given to a sandbank in the Inner Sound of the Pentland Firth. It is found that inclusion of wave action alters hydrodynamics, although extent of alteration is dependant of wave direction. Magnitude of sediment transport is increased when waves are included in the simulations and this has implications for morphological and volumetric changes. Volumetric changes are substantially increased when wave action is included: the impact of including waves is greater than the impact of including tidal stream turbines. Therefore it is recommended that at tidal turbine array sites exposed to large swell or wind-seas, waves should be considered for inclusion in simulations of physical impact.
published_date 2018-09-01T03:48:35Z
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score 11.016235

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