Articles | Volume 11, issue 3
https://doi.org/10.5194/esurf-11-363-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/esurf-11-363-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
05 May 2023
Research article |
| 05 May 2023
| 05 May 2023
Phenomenological model of suspended sediment transport in a small catchment
Amande Roque-Bernard
CORRESPONDING AUTHOR
Institut de physique du globe de Paris, Université Paris Cité, CNRS, 75005, Paris, France
Institut de physique du globe de Paris, Université Paris Cité, CNRS, 75005, Paris, France
Eric Gayer
Institut de physique du globe de Paris, Université Paris Cité, CNRS, 75005, Paris, France
Pascal Allemand
Laboratoire de Géologie de Lyon, Terre Planètes Environnement, Université de Lyon, Université Lyon 1 & ENS Lyon & CNRS, UMR 5276, 69100 Villeurbanne, France
Céline Dessert
Institut de physique du globe de Paris, Université Paris Cité, CNRS, 75005, Paris, France
Eric Lajeunesse
Institut de physique du globe de Paris, Université Paris Cité, CNRS, 75005, Paris, France
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Yassine Boukhari, Antoine Lucas, Caroline Le Bouteiller, Sébastien Klotz, Gabrielle Chabaud, and Stéphane Jacquemoud
EGUsphere, https://doi.org/10.5194/egusphere-2025-1726, https://doi.org/10.5194/egusphere-2025-1726, 2025
Short summary
Short summary
We combine UAV LiDAR surveys with sediment export and density measurements in order to compute a catchment-scale mass balance in a badland environment. We find out that landslides and crests failures account for 15 % of the total mass export while affecting only 1 % of the bare surfaces, and also that low drainage areas produce 3.5 times more sediment than average slopes within such catchments.
Pascal Allemand, Eric Lajeunesse, Olivier Devauchelle, and Vincent J. Langlois
Earth Surf. Dynam., 11, 21–32, https://doi.org/10.5194/esurf-11-21-2023, https://doi.org/10.5194/esurf-11-21-2023, 2023
Short summary
Short summary
We recorded yearly images of a bar of the Vieux-Habitants river, a river located on Basse-Terre (Guadeloupe). These images, combined with measurements of the river discharge, allow us to monitor the evolution of the population of boulders. We estimate the smallest discharge that can move the boulders and calculate the effective transport time. We show that the likelihood of a given boulder remaining at the same location decreases exponentially, with an effective residence time of 17 h.
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Short summary
Sediment transport in rivers is an important matter in Earth surface dynamics. We offer a new framework of understanding of the suspended sediment transport through observatory chronicles and a simple model that is able to catch the behavior during a flood event as well as time series in a steep river catchment. We validate our approach in both tropical and alpine environments, which also offers additional estimates of the size of the suspended sediment.
Sediment transport in rivers is an important matter in Earth surface dynamics. We offer a new...
