International Snow Science Workshop Proceedings - Montana State University Library

Item: A New Application for Quick Boundary Limits of Avalanche Events: Procedure and First Validation

• • Title: A New Application for Quick Boundary Limits of Avalanche Events: Procedure and First Validation

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

    Authors:

    • Bornaz L.  [ Ad Hoc 3D Solutions s.r.l., Gressan (AO) - Italy ]
    • Durand N.  [ Fondazione Montagna sicura - Montagne sûre, Courmayeur (AO) – Italy ]
    • Frigo B.  [ Fondazione Montagna sicura - Montagne sûre, Courmayeur (AO) – Italy ]
    • Dellavedova P.  [ Fondazione Montagna sicura - Montagne sûre, Courmayeur (AO) – Italy ]
    • Segor V.  [ Struttura assetto idrogeologico dei bacini montani – Ufficio Neve e Valanghe, Regione Autonoma Valle d’Aosta, Quart (AO) - Italy ]

    Date: 2013-10-07

    Abstract: In the framework of MAP3 ALCOTRA project, a 3D mapping tool is under developing to rapidly take the avalanche census and implement the regional Cadastre. This method was born to support Forecasters and Cartographers for the rapid measurement and drawing of avalanche limits, especially on the deposition zone. The tool manages both single or sequence of digital photographs (taken with a calibrated camera also from the helicopter) of the avalanche events integrated with a digital terrain model and orthophotomaps creating a “solid” geo-referenced image showed in 3D-GIS environment. The developed methodology allow experts to map the corrected perimeter of the avalanche according to the morphology of the avalanche basin and to take some between avalanche limits and strategic points (roads, buildings, cableways, etc…). The output of the tool will be the perimeter of the avalanche in a shape file format linked to an additional information table. To validate the methodology, three regional avalanche test sites are taken into account: P.ta Seehore in Gressoney-La-Trinité (experimental test site of Aosta Valley to study small/medium avalanche dynamics), Menthieu in Valgrisenche and Crammont in Pré Saint Didier. For each avalanche basin, different methods of perimeter surveys were adopted (laser scanner, GPS, etc …) in order to properly assess the accuracy, advantages and limitations of the tool developed and calibrate it. The goal is to quickly take a survey and mapping the perimeter of avalanche events to have the update of regional Cadastre and hazard maps in Aosta Valley almost in real time.

    Object ID: ISSW13_paper_P2-34.pdf

    Language of Article: English

    Presenter(s): Unknown

    Keywords: avalanche census, solid image, avalanche cadastre, zoning

    Page Number(s): 657-662

    Subjects: avalanche forecasting snow avalanche models experimental test sites

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