Bedload transport in rivers, size matters but so does shape

Abstract Bedload transport modelling in rivers takes into account the size and density of pebbles to estimate particle mobility, but does not formally consider particle shape. To address this issue and to compare the relative roles of the density and shape of particles, we performed original sedimen...

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Autores principales:	Mathieu Cassel, Jérôme Lavé, Alain Recking, Jean-René Malavoi, Hervé Piégay
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/e93571c7f5c1429eb0247c2dedf4ac27
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id	oai:doaj.org-article:e93571c7f5c1429eb0247c2dedf4ac27
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spelling	oai:doaj.org-article:e93571c7f5c1429eb0247c2dedf4ac272021-12-02T15:23:04ZBedload transport in rivers, size matters but so does shape10.1038/s41598-020-79930-72045-2322https://doaj.org/article/e93571c7f5c1429eb0247c2dedf4ac272021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-79930-7https://doaj.org/toc/2045-2322Abstract Bedload transport modelling in rivers takes into account the size and density of pebbles to estimate particle mobility, but does not formally consider particle shape. To address this issue and to compare the relative roles of the density and shape of particles, we performed original sediment transport experiments in an annular flume using molded artificial pebbles equipped with a radio frequency identification tracking system. The particles were designed with four distinct shapes and four different densities while having the same volume, and their speeds and distances traveled under constant hydraulic conditions were analyzed. The results show that particle shape has more influence than particle density on the resting time between particle displacement and the mean traveling distance. For all densities investigated, the particle shape systematically induced differences in travel distance that were strongly correlated (R2 = 0.94) with the Sneed and Folks shape index. Such shape influences, although often mentioned, are here quantified for the first time, demonstrating why and how they can be included in bedload transport models.Mathieu CasselJérôme LavéAlain ReckingJean-René MalavoiHervé PiégayNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Mathieu Cassel Jérôme Lavé Alain Recking Jean-René Malavoi Hervé Piégay Bedload transport in rivers, size matters but so does shape
description	Abstract Bedload transport modelling in rivers takes into account the size and density of pebbles to estimate particle mobility, but does not formally consider particle shape. To address this issue and to compare the relative roles of the density and shape of particles, we performed original sediment transport experiments in an annular flume using molded artificial pebbles equipped with a radio frequency identification tracking system. The particles were designed with four distinct shapes and four different densities while having the same volume, and their speeds and distances traveled under constant hydraulic conditions were analyzed. The results show that particle shape has more influence than particle density on the resting time between particle displacement and the mean traveling distance. For all densities investigated, the particle shape systematically induced differences in travel distance that were strongly correlated (R2 = 0.94) with the Sneed and Folks shape index. Such shape influences, although often mentioned, are here quantified for the first time, demonstrating why and how they can be included in bedload transport models.
format	article
author	Mathieu Cassel Jérôme Lavé Alain Recking Jean-René Malavoi Hervé Piégay
author_facet	Mathieu Cassel Jérôme Lavé Alain Recking Jean-René Malavoi Hervé Piégay
author_sort	Mathieu Cassel
title	Bedload transport in rivers, size matters but so does shape
title_short	Bedload transport in rivers, size matters but so does shape
title_full	Bedload transport in rivers, size matters but so does shape
title_fullStr	Bedload transport in rivers, size matters but so does shape
title_full_unstemmed	Bedload transport in rivers, size matters but so does shape
title_sort	bedload transport in rivers, size matters but so does shape
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/e93571c7f5c1429eb0247c2dedf4ac27
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_version_	1718387358926110720

Bedload transport in rivers, size matters but so does shape

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