Relevance of acoustic methods to quantify bedload transport and bedform dynamics in a large sandy-gravel-bed river

Relevance of acoustic methods to quantify bedload transport and bedform dynamics in a large sandy-gravel-bed river

<p>Despite the inherent difficulties in quantifying its value, bedload transport is essential for understanding fluvial systems. In this study, we assessed different indirect bedload measurement techniques with a reference direct bedload measurement in a reach of a large sandy-gravel-bed river...

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Main Authors: J. Le Guern, S. Rodrigues, T. Geay, S. Zanker, A. Hauet, P. Tassi, N. Claude, P. Jugé, A. Duperray, L. Vervynck
Format: Article
Language:English
Published: Copernicus Publications 2021-05-01
Series:Earth Surface Dynamics
Online Access:https://esurf.copernicus.org/articles/9/423/2021/esurf-9-423-2021.pdf
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spelling doaj-062a6e37cab747a48aec868281a8f6242021-05-27T09:32:30ZengCopernicus PublicationsEarth Surface Dynamics2196-63112196-632X2021-05-01942344410.5194/esurf-9-423-2021Relevance of acoustic methods to quantify bedload transport and bedform dynamics in a large sandy-gravel-bed riverJ. Le Guern0S. Rodrigues1S. Rodrigues2T. Geay3S. Zanker4A. Hauet5P. Tassi6P. Tassi7N. Claude8N. Claude9P. Jugé10A. Duperray11L. Vervynck12UMR CNRS CITERES, University of Tours, Tours, FranceUMR CNRS CITERES, University of Tours, Tours, FranceGraduate School of Engineering Polytech Tours, University of Tours, Tours, FranceBURGEAP R & D, Grenoble, FranceEDF, Division Technique Générale, Grenoble, FranceEDF, Division Technique Générale, Grenoble, FranceEDF R & D – National Laboratory for Hydraulics and Environment (LNHE), Chatou, FranceSaint-Venant Laboratory for Hydraulics, Chatou, FranceEDF R & D – National Laboratory for Hydraulics and Environment (LNHE), Chatou, FranceEDF, Centre Ingénierie Hydraulique, La Motte Servolex, FranceCETU Elmis Ingénieries, University of Tours, Chinon, FranceUMR CNRS CITERES, University of Tours, Tours, FranceUMR CNRS CITERES, University of Tours, Tours, France<p>Despite the inherent difficulties in quantifying its value, bedload transport is essential for understanding fluvial systems. In this study, we assessed different indirect bedload measurement techniques with a reference direct bedload measurement in a reach of a large sandy-gravel-bed river. An acoustic Doppler current profiler (aDcp), the dune tracking method (DTM) and hydrophone measurement techniques were used to determine bedload transport rates by using calibration with the reference method or by using empirical formulas. This study is the first work which attempted to use a hydrophone to quantify bedload rates in a large sandy-gravel-bed river. Results show that the hydrophone is the most efficient and accurate method for determining bedload fluxes in the Loire River. Although further work is needed to identify the parameters controlling self-generated sediment noise, the calibration procedure adopted in this study allows a satisfactory estimation of bedload transport rates. Moreover, aDcp and hydrophone measurement techniques are accurate enough to quantify bedload variations associated with dune migration.</p>https://esurf.copernicus.org/articles/9/423/2021/esurf-9-423-2021.pdf
collection DOAJ
language English
format Article
sources DOAJ
author J. Le Guern
S. Rodrigues
S. Rodrigues
T. Geay
S. Zanker
A. Hauet
P. Tassi
P. Tassi
N. Claude
N. Claude
P. Jugé
A. Duperray
L. Vervynck
spellingShingle J. Le Guern
S. Rodrigues
S. Rodrigues
T. Geay
S. Zanker
A. Hauet
P. Tassi
P. Tassi
N. Claude
N. Claude
P. Jugé
A. Duperray
L. Vervynck
Relevance of acoustic methods to quantify bedload transport and bedform dynamics in a large sandy-gravel-bed river
Earth Surface Dynamics
author_facet J. Le Guern
S. Rodrigues
S. Rodrigues
T. Geay
S. Zanker
A. Hauet
P. Tassi
P. Tassi
N. Claude
N. Claude
P. Jugé
A. Duperray
L. Vervynck
author_sort J. Le Guern
title Relevance of acoustic methods to quantify bedload transport and bedform dynamics in a large sandy-gravel-bed river
title_short Relevance of acoustic methods to quantify bedload transport and bedform dynamics in a large sandy-gravel-bed river
title_full Relevance of acoustic methods to quantify bedload transport and bedform dynamics in a large sandy-gravel-bed river
title_fullStr Relevance of acoustic methods to quantify bedload transport and bedform dynamics in a large sandy-gravel-bed river
title_full_unstemmed Relevance of acoustic methods to quantify bedload transport and bedform dynamics in a large sandy-gravel-bed river
title_sort relevance of acoustic methods to quantify bedload transport and bedform dynamics in a large sandy-gravel-bed river
publisher Copernicus Publications
series Earth Surface Dynamics
issn 2196-6311
2196-632X
publishDate 2021-05-01
description <p>Despite the inherent difficulties in quantifying its value, bedload transport is essential for understanding fluvial systems. In this study, we assessed different indirect bedload measurement techniques with a reference direct bedload measurement in a reach of a large sandy-gravel-bed river. An acoustic Doppler current profiler (aDcp), the dune tracking method (DTM) and hydrophone measurement techniques were used to determine bedload transport rates by using calibration with the reference method or by using empirical formulas. This study is the first work which attempted to use a hydrophone to quantify bedload rates in a large sandy-gravel-bed river. Results show that the hydrophone is the most efficient and accurate method for determining bedload fluxes in the Loire River. Although further work is needed to identify the parameters controlling self-generated sediment noise, the calibration procedure adopted in this study allows a satisfactory estimation of bedload transport rates. Moreover, aDcp and hydrophone measurement techniques are accurate enough to quantify bedload variations associated with dune migration.</p>
url https://esurf.copernicus.org/articles/9/423/2021/esurf-9-423-2021.pdf
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