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Computational investigation of hydraulic performance variation with geometry in gabion stepped spillways

Dominic Reeve Orcid Logo, Ali Adel Zuhaira, Harshinie Karunarathna Orcid Logo

Water Science and Engineering

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

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DOI (Published version): 10.1016/j.wse.2019.04.002

Abstract

Over recent years, there has been a clear increase in the frequency of reported flooding events around the world. Gabion structures offer one means of flood mitigation in dam spillways. These types of structures provide an additional challenge to the computational modeller in that flow through the p...

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Published in: Water Science and Engineering
ISSN: 1674-2370
Published: 2019
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URI: https://cronfa.swan.ac.uk/Record/cronfa49955
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first_indexed 2019-04-15T09:29:07Z
last_indexed 2019-07-17T15:33:57Z
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spelling 2019-07-17T11:09:56.1898419 v2 49955 2019-04-11 Computational investigation of hydraulic performance variation with geometry in gabion stepped spillways 3e76fcc2bb3cde4ddee2c8edfd2f0082 0000-0003-1293-4743 Dominic Reeve Dominic Reeve true false 0d3d327a240d49b53c78e02b7c00e625 0000-0002-9087-3811 Harshinie Karunarathna Harshinie Karunarathna true false 2019-04-11 CIVL Over recent years, there has been a clear increase in the frequency of reported flooding events around the world. Gabion structures offer one means of flood mitigation in dam spillways. These types of structures provide an additional challenge to the computational modeller in that flow through the porous gabions must be simulated. We have used a computational model to investigate the flow over gabion stepped spillways. The model was first validated against published experimental results. Then, gabion stepped spillways with four different step geometries were tested under the same conditions in order to facilitate inter-comparisons and to choose the best option in terms of energy dissipation. The results show that normal gabion steps can dissipate more energy than overlap, inclined, and pooled steps. An intensive set of tests with varying slope, stone size, and porosity were undertaken. The location of the inception point and the water depth at this point obtained from this study were compared with those from existing formulae. Two new empirical equations have been derived, on the basis of regression, to provide improved results for gabion stepped spillways. Journal Article Water Science and Engineering 1674-2370 Computational modelling, Energy dissipation, Gabion stepped spillways, Inception point location, Skimming flow 31 3 2019 2019-03-31 10.1016/j.wse.2019.04.002 COLLEGE NANME Civil Engineering COLLEGE CODE CIVL Swansea University 2019-07-17T11:09:56.1898419 2019-04-11T08:29:21.1515663 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Civil Engineering Dominic Reeve 0000-0003-1293-4743 1 Ali Adel Zuhaira 2 Harshinie Karunarathna 0000-0002-9087-3811 3 0049955-17072019110909.pdf 49955.pdf 2019-07-17T11:09:09.0670000 Output 1958646 application/pdf Version of Record true 2019-07-17T00:00:00.0000000 Distributed under the terms of a Creative Commons Attribution Non-Commercial No Derivatives License (CC-BY-NC-ND) true eng 0049955-11042019083417.pdf reeve2019.pdf 2019-04-11T08:34:17.9100000 Output 9736973 application/pdf Accepted Manuscript true 2019-04-11T00:00:00.0000000 true eng
title Computational investigation of hydraulic performance variation with geometry in gabion stepped spillways
spellingShingle Computational investigation of hydraulic performance variation with geometry in gabion stepped spillways
Dominic Reeve
Harshinie Karunarathna
title_short Computational investigation of hydraulic performance variation with geometry in gabion stepped spillways
title_full Computational investigation of hydraulic performance variation with geometry in gabion stepped spillways
title_fullStr Computational investigation of hydraulic performance variation with geometry in gabion stepped spillways
title_full_unstemmed Computational investigation of hydraulic performance variation with geometry in gabion stepped spillways
title_sort Computational investigation of hydraulic performance variation with geometry in gabion stepped spillways
author_id_str_mv 3e76fcc2bb3cde4ddee2c8edfd2f0082
0d3d327a240d49b53c78e02b7c00e625
author_id_fullname_str_mv 3e76fcc2bb3cde4ddee2c8edfd2f0082_***_Dominic Reeve
0d3d327a240d49b53c78e02b7c00e625_***_Harshinie Karunarathna
author Dominic Reeve
Harshinie Karunarathna
author2 Dominic Reeve
Ali Adel Zuhaira
Harshinie Karunarathna
format Journal article
container_title Water Science and Engineering
publishDate 2019
institution Swansea University
issn 1674-2370
doi_str_mv 10.1016/j.wse.2019.04.002
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 Over recent years, there has been a clear increase in the frequency of reported flooding events around the world. Gabion structures offer one means of flood mitigation in dam spillways. These types of structures provide an additional challenge to the computational modeller in that flow through the porous gabions must be simulated. We have used a computational model to investigate the flow over gabion stepped spillways. The model was first validated against published experimental results. Then, gabion stepped spillways with four different step geometries were tested under the same conditions in order to facilitate inter-comparisons and to choose the best option in terms of energy dissipation. The results show that normal gabion steps can dissipate more energy than overlap, inclined, and pooled steps. An intensive set of tests with varying slope, stone size, and porosity were undertaken. The location of the inception point and the water depth at this point obtained from this study were compared with those from existing formulae. Two new empirical equations have been derived, on the basis of regression, to provide improved results for gabion stepped spillways.
published_date 2019-03-31T04:01:14Z
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score 11.014067

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