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Étude de l'érosion des berges et du transport de sédiments d'une micro-rivière à chenal droit

Abstract : This work dealed with the study of the interactions between tectonics and river morphology. We got interested into the river response to a lateral offset of its channel in order to bring some constraints to the tectonicians that uses terraces offsets to estimate lateral slip rate. This problem was addressed with the use of a laboratory river model of metric size (microscale river). It is shown essentially that (1) experimental microscale channels can be used to study river dynamics, (2) the microscale river, while evolving with a straight channel, denotes a decoupling between the time evolution of its morphology and its sediment transport and (3) the channel response to a lateral offset is characterised by a propagation of an erosion front on the bank exposed to flow that can be described by a kinematic wave, allowing for the channel to return to a stable straight configuration.
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https://tel.archives-ouvertes.fr/tel-00130323
Contributor : Lawrence Armstrong <>
Submitted on : Sunday, February 11, 2007 - 4:17:54 PM
Last modification on : Friday, March 27, 2020 - 3:37:39 AM
Long-term archiving on: : Tuesday, April 6, 2010 - 11:48:18 PM

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  • HAL Id : tel-00130323, version 1

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Lawrence Armstrong. Étude de l'érosion des berges et du transport de sédiments d'une micro-rivière à chenal droit. Géomorphologie. Université Paris-Diderot - Paris VII, 2003. Français. ⟨tel-00130323⟩

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