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A drag force model to incorporate the reconfiguration of full-scale riparian trees under hydrodynamic loading

Peter Whittaker, Catherine Wilson, Jochen Aberle, Hans Peter Rauch, Patricia Xavier Orcid Logo

Journal of Hydraulic Research, Volume: 51, Issue: 5, Pages: 569 - 580

Swansea University Author: Patricia Xavier Orcid Logo

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DOI (Published version): 10.1080/00221686.2013.822936

Abstract

This paper investigates the response of full-scale submerged riparian vegetation to hydrodynamic loading, using data from towing tank experiments of high resolution and accuracy. Drag force and physical property data are presented for 21 foliated and defoliated trees, including specimens of Alnus gl...

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Published in: Journal of Hydraulic Research
ISSN: 0022-1686 1814-2079
Published: Informa UK Limited 2013
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URI: https://cronfa.swan.ac.uk/Record/cronfa52667
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first_indexed 2019-11-07T13:14:17Z
last_indexed 2020-09-17T03:15:31Z
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spelling 2019-11-07T11:58:20.1826478 v2 52667 2019-11-07 A drag force model to incorporate the reconfiguration of full-scale riparian trees under hydrodynamic loading 278e26fd08e48be36f39790aeaff666f 0000-0002-5870-9659 Patricia Xavier Patricia Xavier true false 2019-11-07 GENG This paper investigates the response of full-scale submerged riparian vegetation to hydrodynamic loading, using data from towing tank experiments of high resolution and accuracy. Drag force and physical property data are presented for 21 foliated and defoliated trees, including specimens of Alnus glutinosa, Populus nigra and Salix alba. The force–velocity data and contribution of foliage to the total drag are first discussed, highlighting the non-classical drag force behaviour of flexible vegetation. A theoretical model, based on the vegetative Cauchy number, is proposed from dimensional consideration to account for the bending and reconfiguration of the trees under flow action. The model links measurable vegetation properties, such as volume, height and flexural rigidity, to the force–velocity response. This allows the otherwise complex drag force of flexible vegetation to be predicted with greater accuracy than compared with a rigid cylinder approximation. Journal Article Journal of Hydraulic Research 51 5 569 580 Informa UK Limited 0022-1686 1814-2079 1 10 2013 2013-10-01 10.1080/00221686.2013.822936 http://dx.doi.org/10.1080/00221686.2013.822936 COLLEGE NANME General Engineering COLLEGE CODE GENG Swansea University 2019-11-07T11:58:20.1826478 2019-11-07T11:58:20.1826478 Peter Whittaker 1 Catherine Wilson 2 Jochen Aberle 3 Hans Peter Rauch 4 Patricia Xavier 0000-0002-5870-9659 5
title A drag force model to incorporate the reconfiguration of full-scale riparian trees under hydrodynamic loading
spellingShingle A drag force model to incorporate the reconfiguration of full-scale riparian trees under hydrodynamic loading
Patricia Xavier
title_short A drag force model to incorporate the reconfiguration of full-scale riparian trees under hydrodynamic loading
title_full A drag force model to incorporate the reconfiguration of full-scale riparian trees under hydrodynamic loading
title_fullStr A drag force model to incorporate the reconfiguration of full-scale riparian trees under hydrodynamic loading
title_full_unstemmed A drag force model to incorporate the reconfiguration of full-scale riparian trees under hydrodynamic loading
title_sort A drag force model to incorporate the reconfiguration of full-scale riparian trees under hydrodynamic loading
author_id_str_mv 278e26fd08e48be36f39790aeaff666f
author_id_fullname_str_mv 278e26fd08e48be36f39790aeaff666f_***_Patricia Xavier
author Patricia Xavier
author2 Peter Whittaker
Catherine Wilson
Jochen Aberle
Hans Peter Rauch
Patricia Xavier
format Journal article
container_title Journal of Hydraulic Research
container_volume 51
container_issue 5
container_start_page 569
publishDate 2013
institution Swansea University
issn 0022-1686
1814-2079
doi_str_mv 10.1080/00221686.2013.822936
publisher Informa UK Limited
url http://dx.doi.org/10.1080/00221686.2013.822936
document_store_str 0
active_str 0
description This paper investigates the response of full-scale submerged riparian vegetation to hydrodynamic loading, using data from towing tank experiments of high resolution and accuracy. Drag force and physical property data are presented for 21 foliated and defoliated trees, including specimens of Alnus glutinosa, Populus nigra and Salix alba. The force–velocity data and contribution of foliage to the total drag are first discussed, highlighting the non-classical drag force behaviour of flexible vegetation. A theoretical model, based on the vegetative Cauchy number, is proposed from dimensional consideration to account for the bending and reconfiguration of the trees under flow action. The model links measurable vegetation properties, such as volume, height and flexural rigidity, to the force–velocity response. This allows the otherwise complex drag force of flexible vegetation to be predicted with greater accuracy than compared with a rigid cylinder approximation.
published_date 2013-10-01T04:05:10Z
_version_ 1763753391916318720
score 11.036334

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