Local scour around a bridge pier under ice-jammed flow condition – an experimental study
Abstract The appearance of an ice jam in a river crucially distorts local hydrodynamic conditions including water level, flow velocity, riverbed form and local scour processes. Laboratory experiments are used for the first time here to study ice-induced scour processes near a bridge pier. Results sh...
Published in: | Journal of Hydrology and Hydromechanics |
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Language: | English |
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2021
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Online Access: | http://dx.doi.org/10.2478/johh-2021-0014 https://www.sciendo.com/pdf/10.2478/johh-2021-0014 |
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crdegruyter:10.2478/johh-2021-0014 2024-09-15T18:12:27+00:00 Local scour around a bridge pier under ice-jammed flow condition – an experimental study Wang, Jun Hou, Zhixing Sun, Hongjian Fang, Bihe Sui, Jueyi Karney, Bryan 2021 http://dx.doi.org/10.2478/johh-2021-0014 https://www.sciendo.com/pdf/10.2478/johh-2021-0014 en eng Walter de Gruyter GmbH http://creativecommons.org/licenses/by-nc-nd/3.0 Journal of Hydrology and Hydromechanics volume 69, issue 3, page 275-287 ISSN 1338-4333 journal-article 2021 crdegruyter https://doi.org/10.2478/johh-2021-0014 2024-08-19T04:08:33Z Abstract The appearance of an ice jam in a river crucially distorts local hydrodynamic conditions including water level, flow velocity, riverbed form and local scour processes. Laboratory experiments are used for the first time here to study ice-induced scour processes near a bridge pier. Results show that with an ice sheet cover the scour hole depth around a bridge is increased by about 10% compared to under equivalent open flow conditions. More dramatically, ice-jammed flows induce both greater scour depths and scour variability, with the maximum scour depth under an ice-jammed flow as much as 200% greater than under equivalent open flow conditions. Under an ice-jammed condition, both the maximum depth and length of scour holes around a bridge pier increase with the flow velocity while the maximum scour hole depth increases with ice-jam thickness. Also, quite naturally, the height of the resulting deposition dune downstream of a scour hole responds to flow velocity and ice jam thickness. Using the laboratory data under ice-jammed conditions, predictive relationships are derived between the flow’s Froude number and both the dimensionless maximum scour depth and the dimensionless maximum scour length. Article in Journal/Newspaper Ice Sheet De Gruyter Journal of Hydrology and Hydromechanics 69 3 275 287 |
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Open Polar |
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De Gruyter |
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crdegruyter |
language |
English |
description |
Abstract The appearance of an ice jam in a river crucially distorts local hydrodynamic conditions including water level, flow velocity, riverbed form and local scour processes. Laboratory experiments are used for the first time here to study ice-induced scour processes near a bridge pier. Results show that with an ice sheet cover the scour hole depth around a bridge is increased by about 10% compared to under equivalent open flow conditions. More dramatically, ice-jammed flows induce both greater scour depths and scour variability, with the maximum scour depth under an ice-jammed flow as much as 200% greater than under equivalent open flow conditions. Under an ice-jammed condition, both the maximum depth and length of scour holes around a bridge pier increase with the flow velocity while the maximum scour hole depth increases with ice-jam thickness. Also, quite naturally, the height of the resulting deposition dune downstream of a scour hole responds to flow velocity and ice jam thickness. Using the laboratory data under ice-jammed conditions, predictive relationships are derived between the flow’s Froude number and both the dimensionless maximum scour depth and the dimensionless maximum scour length. |
format |
Article in Journal/Newspaper |
author |
Wang, Jun Hou, Zhixing Sun, Hongjian Fang, Bihe Sui, Jueyi Karney, Bryan |
spellingShingle |
Wang, Jun Hou, Zhixing Sun, Hongjian Fang, Bihe Sui, Jueyi Karney, Bryan Local scour around a bridge pier under ice-jammed flow condition – an experimental study |
author_facet |
Wang, Jun Hou, Zhixing Sun, Hongjian Fang, Bihe Sui, Jueyi Karney, Bryan |
author_sort |
Wang, Jun |
title |
Local scour around a bridge pier under ice-jammed flow condition – an experimental study |
title_short |
Local scour around a bridge pier under ice-jammed flow condition – an experimental study |
title_full |
Local scour around a bridge pier under ice-jammed flow condition – an experimental study |
title_fullStr |
Local scour around a bridge pier under ice-jammed flow condition – an experimental study |
title_full_unstemmed |
Local scour around a bridge pier under ice-jammed flow condition – an experimental study |
title_sort |
local scour around a bridge pier under ice-jammed flow condition – an experimental study |
publisher |
Walter de Gruyter GmbH |
publishDate |
2021 |
url |
http://dx.doi.org/10.2478/johh-2021-0014 https://www.sciendo.com/pdf/10.2478/johh-2021-0014 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Journal of Hydrology and Hydromechanics volume 69, issue 3, page 275-287 ISSN 1338-4333 |
op_rights |
http://creativecommons.org/licenses/by-nc-nd/3.0 |
op_doi |
https://doi.org/10.2478/johh-2021-0014 |
container_title |
Journal of Hydrology and Hydromechanics |
container_volume |
69 |
container_issue |
3 |
container_start_page |
275 |
op_container_end_page |
287 |
_version_ |
1810450037897953280 |