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The cumulative impact of tidal stream turbine arrays on sediment transport in the Pentland Firth / Iain Fairley, Ian Masters, Harshinie Karunarathna

Renewable Energy, Volume: 80, Pages: 755 - 769

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

Abstract

This contribution investigates the impact of the deployment of tidal stream turbine arrays on sediment dynamics and seabed morphology in the Pentland Firth, Scotland. The Pentland Firth is arguably the premier tidal stream site in the world and engineering developments are progressing rapidly. There...

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Published in: Renewable Energy
ISSN: 0960-1481
Published: 2015
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URI: https://cronfa.swan.ac.uk/Record/cronfa20563
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The Pentland Firth is arguably the premier tidal stream site in the world and engineering developments are progressing rapidly. Therefore understanding and minimising impacts is vital to ensure the successful development of this nascent industry. Here a 3 dimensional coupled hydrodynamic and sediment transport numerical model is used to investigate the impact on sediment transport and morphodynamics of tidal stream arrays. The aim of the work presented here is twofold: firstly to provide prediction of the changes caused by multiple tidal stream turbine array developments to some of the unique sandy seabed environments in the Pentland Firth and secondly as a case study to determine the relationship between impacts of individual tidal stream farms and cumulative impacts of multiple farms. Due to connectivity in tidal flow it has been hypothesized that the cumulative impact of multiple arrays on sediment dynamics might be non-linear. This work suggests that, for the Pentland Firth, this is not the case: the cumulative impact of the 4 currently proposed arrays in the area is equal to the sum of the impacts of the individual arrays. Additionally, array implementation only has minimal effect on the baseline morphodynamics of the large sandbanks in the region, smaller more local sandbanks were not considered. 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spelling 2021-01-14T13:26:48.7751088 v2 20563 2015-03-27 The cumulative impact of tidal stream turbine arrays on sediment transport in the Pentland Firth 568e6f260489dc8139afe77757553513 Iain Fairley Iain Fairley true false 6fa19551092853928cde0e6d5fac48a1 0000-0001-7667-6670 Ian Masters Ian Masters true false 0d3d327a240d49b53c78e02b7c00e625 0000-0002-9087-3811 Harshinie Karunarathna Harshinie Karunarathna true false 2015-03-27 CIVL This contribution investigates the impact of the deployment of tidal stream turbine arrays on sediment dynamics and seabed morphology in the Pentland Firth, Scotland. The Pentland Firth is arguably the premier tidal stream site in the world and engineering developments are progressing rapidly. Therefore understanding and minimising impacts is vital to ensure the successful development of this nascent industry. Here a 3 dimensional coupled hydrodynamic and sediment transport numerical model is used to investigate the impact on sediment transport and morphodynamics of tidal stream arrays. The aim of the work presented here is twofold: firstly to provide prediction of the changes caused by multiple tidal stream turbine array developments to some of the unique sandy seabed environments in the Pentland Firth and secondly as a case study to determine the relationship between impacts of individual tidal stream farms and cumulative impacts of multiple farms. Due to connectivity in tidal flow it has been hypothesized that the cumulative impact of multiple arrays on sediment dynamics might be non-linear. This work suggests that, for the Pentland Firth, this is not the case: the cumulative impact of the 4 currently proposed arrays in the area is equal to the sum of the impacts of the individual arrays. Additionally, array implementation only has minimal effect on the baseline morphodynamics of the large sandbanks in the region, smaller more local sandbanks were not considered. These two results are extremely positive for tidal stream developers in the region since it removes the burden of assessing cumulative impact from individual developers and suggests that impacts to sub-sea morphodynamics is insignificant and hence is unlikely to be an impediment to development in the Pentland Firth with the currently proposed levels of extraction. Journal Article Renewable Energy 80 755 769 0960-1481 Tidal stream energy; Morphodynamics; Hydrodynamics; Numerical modelling; MIKE3; Pentland Firth 31 8 2015 2015-08-31 10.1016/j.renene.2015.03.004 http://www.journals.elsevier.com/renewable-energy/ © 2015 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). COLLEGE NANME Civil Engineering COLLEGE CODE CIVL Swansea University RCUK 2021-01-14T13:26:48.7751088 2015-03-27T14:57:28.0284359 College of Engineering Engineering Iain Fairley 1 Ian Masters 0000-0001-7667-6670 2 Harshinie Karunarathna 0000-0002-9087-3811 3 0020563-01042016144134.pdf Fairely2015MGv2.pdf 2016-04-01T14:41:34.7770000 Output 4622326 application/pdf Version of Record true 2016-04-01T00:00:00.0000000 true
title The cumulative impact of tidal stream turbine arrays on sediment transport in the Pentland Firth
spellingShingle The cumulative impact of tidal stream turbine arrays on sediment transport in the Pentland Firth
Iain, Fairley
Ian, Masters
Harshinie, Karunarathna
title_short The cumulative impact of tidal stream turbine arrays on sediment transport in the Pentland Firth
title_full The cumulative impact of tidal stream turbine arrays on sediment transport in the Pentland Firth
title_fullStr The cumulative impact of tidal stream turbine arrays on sediment transport in the Pentland Firth
title_full_unstemmed The cumulative impact of tidal stream turbine arrays on sediment transport in the Pentland Firth
title_sort The cumulative impact of tidal stream turbine arrays on sediment transport in the Pentland Firth
author_id_str_mv 568e6f260489dc8139afe77757553513
6fa19551092853928cde0e6d5fac48a1
0d3d327a240d49b53c78e02b7c00e625
author_id_fullname_str_mv 568e6f260489dc8139afe77757553513_***_Iain, Fairley
6fa19551092853928cde0e6d5fac48a1_***_Ian, Masters
0d3d327a240d49b53c78e02b7c00e625_***_Harshinie, Karunarathna
author Iain, Fairley
Ian, Masters
Harshinie, Karunarathna
author2 Iain Fairley
Ian Masters
Harshinie Karunarathna
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container_title Renewable Energy
container_volume 80
container_start_page 755
publishDate 2015
institution Swansea University
issn 0960-1481
doi_str_mv 10.1016/j.renene.2015.03.004
college_str College of Engineering
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url http://www.journals.elsevier.com/renewable-energy/
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description This contribution investigates the impact of the deployment of tidal stream turbine arrays on sediment dynamics and seabed morphology in the Pentland Firth, Scotland. The Pentland Firth is arguably the premier tidal stream site in the world and engineering developments are progressing rapidly. Therefore understanding and minimising impacts is vital to ensure the successful development of this nascent industry. Here a 3 dimensional coupled hydrodynamic and sediment transport numerical model is used to investigate the impact on sediment transport and morphodynamics of tidal stream arrays. The aim of the work presented here is twofold: firstly to provide prediction of the changes caused by multiple tidal stream turbine array developments to some of the unique sandy seabed environments in the Pentland Firth and secondly as a case study to determine the relationship between impacts of individual tidal stream farms and cumulative impacts of multiple farms. Due to connectivity in tidal flow it has been hypothesized that the cumulative impact of multiple arrays on sediment dynamics might be non-linear. This work suggests that, for the Pentland Firth, this is not the case: the cumulative impact of the 4 currently proposed arrays in the area is equal to the sum of the impacts of the individual arrays. Additionally, array implementation only has minimal effect on the baseline morphodynamics of the large sandbanks in the region, smaller more local sandbanks were not considered. These two results are extremely positive for tidal stream developers in the region since it removes the burden of assessing cumulative impact from individual developers and suggests that impacts to sub-sea morphodynamics is insignificant and hence is unlikely to be an impediment to development in the Pentland Firth with the currently proposed levels of extraction.
published_date 2015-08-31T03:34:31Z
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