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Modelling 3D hydrodynamics governing island-associated sandbanks in a proposed tidal stream energy site

Antonia Chatzirodou, Harshinie Karunarathna Orcid Logo, Dominic Reeve Orcid Logo

Applied Ocean Research, Volume: 66, Pages: 79 - 94

Swansea University Authors: Harshinie Karunarathna Orcid Logo, Dominic Reeve Orcid Logo

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DOI (Published version): 10.1016/j.apor.2017.04.008

Abstract

A 3D numerical modelling study to investigate the existing hydrodynamic regime of the Pentland Firth Inner Sound Channel, Scotland, UK is presented. Hydrodynamics that govern some sensitive sedimentary deposits in the Inner Sound Channel are discussed. A 3D hydrodynamic model Delft3D is set up for P...

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Published in: Applied Ocean Research
ISSN: 0141-1187
Published: 2017
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URI: https://cronfa.swan.ac.uk/Record/cronfa34141
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spelling 2017-08-07T14:25:35.3770132 v2 34141 2017-06-05 Modelling 3D hydrodynamics governing island-associated sandbanks in a proposed tidal stream energy site 0d3d327a240d49b53c78e02b7c00e625 0000-0002-9087-3811 Harshinie Karunarathna Harshinie Karunarathna true false 3e76fcc2bb3cde4ddee2c8edfd2f0082 0000-0003-1293-4743 Dominic Reeve Dominic Reeve true false 2017-06-05 CIVL A 3D numerical modelling study to investigate the existing hydrodynamic regime of the Pentland Firth Inner Sound Channel, Scotland, UK is presented. Hydrodynamics that govern some sensitive sedimentary deposits in the Inner Sound Channel are discussed. A 3D hydrodynamic model Delft3D is set up for Pentland Firth, located between Orkney Islands and mainland Scotland and a full sensitivity analysis of the numerical model is carried out. The current model set up sufficiently captures the existing hydrodynamics during a full spring-neap tidal cycle inside Pentland Firth. Using model results, the 3D structure of the dynamics of the tidal flows in the Inner Sound Channel is investigated. The temporal variability of tidal flows, the residual tidal flows in the channel and local flow interactions with the Island of Stroma are described. It is proved that the tidally dominant flows drive the sediment transport gradient model to explain the principle maintenance mechanisms of two island-associated sandbanks present in the Inner Sound. The present study provides detailed information on the physics of the tidal regime in the Inner Sound and explains the presence of sandbanks in an area of high tidal flows. Due to extremely high tidal flows, Inner Sound is considered as one of the most favourable sites for tidal energy extraction in the UK. The findings of this study will be very useful in assessing the significance of impacts of future tidal energy extraction on natural hydrodynamics and sediment dynamics of the area. Journal Article Applied Ocean Research 66 79 94 0141-1187 Delft3D; Pentland firth; Inner sound; Tidal dynamics; Sandbanks; Tidal stream energy 31 12 2017 2017-12-31 10.1016/j.apor.2017.04.008 COLLEGE NANME Civil Engineering COLLEGE CODE CIVL Swansea University 2017-08-07T14:25:35.3770132 2017-06-05T09:58:35.9632050 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Civil Engineering Antonia Chatzirodou 1 Harshinie Karunarathna 0000-0002-9087-3811 2 Dominic Reeve 0000-0003-1293-4743 3 0034141-05062017095931.pdf chatzirodou2017v2.pdf 2017-06-05T09:59:31.7970000 Output 7579638 application/pdf Version of Record true 2017-06-05T00:00:00.0000000 true eng
title Modelling 3D hydrodynamics governing island-associated sandbanks in a proposed tidal stream energy site
spellingShingle Modelling 3D hydrodynamics governing island-associated sandbanks in a proposed tidal stream energy site
Harshinie Karunarathna
Dominic Reeve
title_short Modelling 3D hydrodynamics governing island-associated sandbanks in a proposed tidal stream energy site
title_full Modelling 3D hydrodynamics governing island-associated sandbanks in a proposed tidal stream energy site
title_fullStr Modelling 3D hydrodynamics governing island-associated sandbanks in a proposed tidal stream energy site
title_full_unstemmed Modelling 3D hydrodynamics governing island-associated sandbanks in a proposed tidal stream energy site
title_sort Modelling 3D hydrodynamics governing island-associated sandbanks in a proposed tidal stream energy site
author_id_str_mv 0d3d327a240d49b53c78e02b7c00e625
3e76fcc2bb3cde4ddee2c8edfd2f0082
author_id_fullname_str_mv 0d3d327a240d49b53c78e02b7c00e625_***_Harshinie Karunarathna
3e76fcc2bb3cde4ddee2c8edfd2f0082_***_Dominic Reeve
author Harshinie Karunarathna
Dominic Reeve
author2 Antonia Chatzirodou
Harshinie Karunarathna
Dominic Reeve
format Journal article
container_title Applied Ocean Research
container_volume 66
container_start_page 79
publishDate 2017
institution Swansea University
issn 0141-1187
doi_str_mv 10.1016/j.apor.2017.04.008
college_str Faculty of Science and Engineering
hierarchytype
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 - Civil Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Civil Engineering
document_store_str 1
active_str 0
description A 3D numerical modelling study to investigate the existing hydrodynamic regime of the Pentland Firth Inner Sound Channel, Scotland, UK is presented. Hydrodynamics that govern some sensitive sedimentary deposits in the Inner Sound Channel are discussed. A 3D hydrodynamic model Delft3D is set up for Pentland Firth, located between Orkney Islands and mainland Scotland and a full sensitivity analysis of the numerical model is carried out. The current model set up sufficiently captures the existing hydrodynamics during a full spring-neap tidal cycle inside Pentland Firth. Using model results, the 3D structure of the dynamics of the tidal flows in the Inner Sound Channel is investigated. The temporal variability of tidal flows, the residual tidal flows in the channel and local flow interactions with the Island of Stroma are described. It is proved that the tidally dominant flows drive the sediment transport gradient model to explain the principle maintenance mechanisms of two island-associated sandbanks present in the Inner Sound. The present study provides detailed information on the physics of the tidal regime in the Inner Sound and explains the presence of sandbanks in an area of high tidal flows. Due to extremely high tidal flows, Inner Sound is considered as one of the most favourable sites for tidal energy extraction in the UK. The findings of this study will be very useful in assessing the significance of impacts of future tidal energy extraction on natural hydrodynamics and sediment dynamics of the area.
published_date 2017-12-31T03:42:21Z
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