Small-Scale Study of Debris-Flow Interactions with a Lateral Debris Basin and Crossings: The Manival Torrent Case Study
Résumé
Small-scale models are useful tools to study the interactions between debris flows and structures and channels. Small-scale modelling of debris flows remains however complicated because of the complex rheology and scaling challenges of these geophysical processes. A recent study of a debris basin and the downstream channel where two fords and a bridge are located is presented in this paper. The studied torrent is the Manival catchment, located near Grenoble in France. We present the catchment features, the scientific questions studied, some calibration results describing the mixtures used and results from seven debris-flood and five debris-flow runs. In essence, the model highlighted that the structure enables a large share of the bedload transport to pass downstream. Debris flows can be more or equally trapped depending on their rheology which controls the deposition slope in the debris basin.
Domaines
Géomorphologie| Origine | Accord explicite pour ce dépôt |
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