Item: Introduction and Influence of (Large) Existing Buildings on Avalanche Hazard Zoning: Case Study of Flaine
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Title: Introduction and Influence of (Large) Existing Buildings on Avalanche Hazard Zoning: Case Study of Flaine
Proceedings: International Snow Science Workshop 2016 Proceedings, Breckenridge, CO, USA
Authors:
- Philippe Berthet-Rambaud [ Engineerisk, Ste Helene du Lac, France ]
- Fanny Bourjaillat [ Engineerisk, Ste Helene du Lac, France ]
Date: 2016-10-02
Abstract: Flaine is a French ski resort developed ex-nihilo since the 60s. In spite of avalanche slopes just above, the different settlements were possible thanks to an extensive permanent protection network including kilometers of snow bridges and nets. In the meantime, the French regulations about hazards zoning and land planning was progressively structured. Currently, it does not take into account existing protections like supporting structures to influence zoning and to allow new buildings in possibly protected areas. In this context, this study analyses the influence and possible indirect protective effect of existing buildings on surrounding areas. The corresponding results are presented starting with the procedure to assess the "dam capacity" of each building regarding both resistance and geometry, even if not specifically "avalanche designed". Therefore, two approaches are proposed to introduce them in RAMMS software either as perfect obstacles or modified roughness. Modeling results are finally compared to a reference historical scenario to confirm the strong indirect protection in the current situation.
Object ID: ISSW16_O7.01.pdf
Language of Article: English
Presenter(s):
Keywords: hazard assessment, obstacle influence, buildings resistance
Page Number(s): 152-158
Subjects: avalanche hazard RAMMS software obstacle influence
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