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Les réseaux de transport routiers face aux laves torrentielles : contribution à l'évaluation du risque : l'exemple des Alpes françaises

Abstract : The Alps are highly impacted by debris-flows triggered by heavy rainfall and snowmelt. Such damaging events to transportation networks caused important socio-economic impacts. Owing to many landlocked valleys in the Alps, the disturbance of road networks does not just affect the damaged area, but extends to all reliant areas and activities. The objective of this thesis was to conduct a systemic analysis of the risk-network structured around every steps of the risk. We selected three catchments located on roads with high territorial issues in the French Alps. The method combined several approaches: 1) a statistical rainfall analysis associated with damaging events, 2) a torrential flows modeling related to physical damage, 3) a comparison of theoretical road crisis management protocols with real crisis management following a damaging event, 4) functional disturbances beyond the impacted area. This thesis has highlighted the factors aggravating structural vulnerability of the network ; it explains the action planning establishing during the damaging event on the Rif Blanc June 4, 2012. Finally, it was estimated the territorial losses of accessibility at various spatial scales.
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  • HAL Id : tel-02495742, version 1

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Marina Utasse. Les réseaux de transport routiers face aux laves torrentielles : contribution à l'évaluation du risque : l'exemple des Alpes françaises. Géographie. Université Panthéon-Sorbonne - Paris I, 2015. Français. ⟨NNT : 2015PA010702⟩. ⟨tel-02495742⟩

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