ANALYSIS OF THE DEBRIS-FLOW HAZARD ON THE RIOULONG TORRENT (HAUTES -PYR ÉNÉES , FRANCE ) ALLUVIAL FAN USING A SCENARIO-BASED APPROACH — IJEGE
 
 
You are here: Focus and scope Issues from 2005 to 2018 5th International Conference on Debris-Flow Hazards "Mitigation, Mechanics, Prediction and Assessment" Topic 8 - Prediction and Assessment of Debris Flow Hazards ANALYSIS OF THE DEBRIS-FLOW HAZARD ON THE RIOULONG TORRENT (HAUTES -PYR ÉNÉES , FRANCE ) ALLUVIAL FAN USING A SCENARIO-BASED APPROACH
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ANALYSIS OF THE DEBRIS-FLOW HAZARD ON THE RIOULONG TORRENT (HAUTES -PYR ÉNÉES , FRANCE ) ALLUVIAL FAN USING A SCENARIO-BASED APPROACH



Abstract:
A method of debris-flow hazard analysis, using the Cemagref LAVE2D model, within a scenariobased approach, is applied to a torrent of the French Pyrenees. A preliminary analysis of the catchment shows that some risk of debris-flow occurrence is present and that scenarios should be constructed accordingly. Numerical simulations are carried out on the basis of these scenarios. They produce maps of maximum extension of debris flows in relation to qualitative levels of probability of occurrence. Simulations also provide information that is useful for the design of a protection structure. Finally, the maximum extension of debris flows resulting from the presence of the protection structure is analyzed.

Authors:
Dominique Laigle - Cemagref, Unité de Recherche Erosion Torrentielle, Neige et Avalanches, BP 76 Domaine Universitaire, F-38402 Saint-Martin-d’Hères Cedex, France
Christophe Peteuil - Office National des Forêts, Service de Restauration des Terrains en Montagne de l’Isère, 9 quai Créqui, F-38000 Grenoble, France
Keywords
Debris-flow, mudflow, erosion processes, hazard assessment, numerical simulation, protection structures.
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