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Theses

Bedload fill of abandoned channels

Abstract : Abandoned channels coarse-grained fill deposits are studied using flume experiments and field surveys. A detailed model of the channel plug architecture is proposed, and controls on its formation identified from flume experiments. Hydraulic effects, controlled by the asymmetry and diversion angle of the bifurcation, determine the sedimentation pattern and extent of the bedload deposits in abandoned channels. These relationships are quantified for the first time. Influence of base level, abandoned channel length or slope is discussed. Field surveys of abandoned channels demonstrate that the bedload channel fill architecture can be preserved in time and that the experimental relationship is reliable to predict the channel plug coarse deposits minimal extent.
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Submitted on : Friday, March 12, 2021 - 11:39:30 AM
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  • HAL Id : tel-03167632, version 1

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Léo Szewczyk. Bedload fill of abandoned channels. Environmental Engineering. Université Paris sciences et lettres, 2020. English. ⟨NNT : 2020UPSLM056⟩. ⟨tel-03167632⟩

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