Phenomenological model of suspended sediment transport in a small catchment
In: ISSN: 2196-6311, 2023
Online
academicJournal
Zugriff:
International audience ; We develop a phenomenological model of suspended sediment transport on the basis of data acquired in the Capesterre river, which drains a small tropical catchment in Guadeloupe. The model correctly represents the concentration of suspended sediment during floods, provided that the relation between concentration and water level forms a counterclockwise loop. In the model, the properties of the sediment and of the river are all lumped into four parameters: a settling velocity related to the size of the suspended sediment, a threshold water level which acts as a proxy for the threshold shear stress, a characteristic entrainment rate, and a dimensionless exponent. The value of the parameters changes from one flood to the next, probably reflecting changes in the characteristics of the river and the fine sediment. Finally, a test of the model against data acquired in a small catchment in the French Alps suggests that the model is versatile enough to be used in diverse hydrological settings.
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Phenomenological model of suspended sediment transport in a small catchment
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Autor/in / Beteiligte Person: | Roque-Bernard, Amande ; Lucas, Antoine ; Gayer, Eric ; Allemand, Pascal ; Dessert, Céline ; Lajeunesse, Eric ; Institut de Physique du Globe de Paris (IPGP (UMR_7154)) ; Institut national des sciences de l'Univers (INSU - CNRS)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) ; Laboratoire de Géologie de Lyon - Terre, Planètes, Environnement (LGL-TPE) ; École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL) ; Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Centre National de la Recherche Scientifique (CNRS) ; ANR-10-LABX-0023,UnivEarthS,Earth - Planets - Universe: observation, modeling, transfer(2010) ; ANR-18-IDEX-0001,Université de Paris,Université de Paris(2018) |
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Zeitschrift: | ISSN: 2196-6311, 2023 |
Veröffentlichung: | HAL CCSD ; European Geosciences Union, 2023 |
Medientyp: | academicJournal |
DOI: | 10.5194/esurf-11-363-2023 |
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