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Item: The Historical Investigation as a Tool to Improve the Hazard Maps: The Case Study of the Historical Avalanche of Avieil (Valle d’Aosta - Italy)

• • Title: The Historical Investigation as a Tool to Improve the Hazard Maps: The Case Study of the Historical Avalanche of Avieil (Valle d’Aosta - Italy)

    Proceedings: International Snow Science Workshop Grenoble – Chamonix Mont-Blanc - October 07-11, 2013

    Authors:

    • S. Roveyaz  [ 13 Fondazione Montagna sicura, Villa Cameron, Località Villard de la Palud 1, 11013 Courmayeur (AO), Italy ]  [ Ufficio neve e valanghe, Assetto idrogeologico dei bacini montani, Regione Autonoma Valle d’Aosta, Loc. Amérique 33, 11020 Quart (AO), Italy ]  [ Corpo forestale della Valle d’Aosta, Dipartimento risorse naturali e corpo forestale, Regione Autonoma Valle d’Aosta, loc. Grande Charrière 6/A, 11020 Saint-Christophe (AO), Italy ]
    • A. Debernardi  [ Fondazione Montagna sicura, Villa Cameron, Località Villard de la Palud 1, 11013 Courmayeur (AO), Italy ]
    • E. Ceaglio  [ Fondazione Montagna sicura, Villa Cameron, Località Villard de la Palud 1, 11013 Courmayeur (AO), Italy ]
    • V. Segor  [ Ufficio neve e valanghe, Assetto idrogeologico dei bacini montani, Regione Autonoma Valle d’Aosta, Loc. Amérique 33, 11020 Quart (AO), Italy ]

    Date: 2013-10-07

    Abstract: Some avalanches, which in the past resulted in catastrophic events, but no more observed, are often very poorly understood. Therefore, for rediscovering and for preserving the historical memory of these calamitous events it can be significant to rectify and to improve the hazard maps and to assure a proper land use planning. On Monday, 27th February 1888, after some days with strong snowfalls (new snow 3 days: 400 cm at Champorcher - 1400 m a.s.l.), a big avalanche occurred, between 9.00 a.m. and 10.00 a.m., at 1900 m a.s.l. from a wide southern slope, strongly deforested for the coal production, located in the municipality of Arnad (Valle d’Aosta-Italy). To cartographically recreate the inhabited nucleus, before and after the avalanche event, and the subsequent stages of maintenance and possible relocation of buildings, two maps, produced by the Office of Rural Architecture (Department of Education and Culture) have been analysed. The combined analysis of these maps together with the re-created avalanche dynamic allowed updating the perimeter and areas of the avalanche phenomenon in the avalanche cartography. As both within the regional avalanche cadastre and within the hazard maps (L.R. n. 11/1998, art. 37) this avalanche phenomenon is strongly underrated, not including the village, this historical investigation turns out to be a tool of great importance for the conservation of the lost historical memory and for updating the risk maps, too.

    Object ID: ISSW13_paper_O2-24.pdf

    Language of Article: English

    Presenter(s): Unknown

    Keywords: avalanche cadastre, Aosta Valley, year 1888, serious damage, historical memory

    Page Number(s): 639-645

    Subjects: avalanche hazard mapping snow avalanche avalanche damage

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