Title:
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Susceptibility assessment of rainfall-triggered flows and slides in the Central-Eastern Pyrenees
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Author:
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Hurlimann Ziegler, Marcel; Lantada Zarzosa, Maria de Las Nieves; Gonzalez, Marta; Pinyol, Jordi
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Other authors:
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Universitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental; Universitat Politècnica de Catalunya. EnGeoModels - Monitoring and Modelling in Engineering Geology; Universitat Politècnica de Catalunya. EGEO - Enginyeria Geomàtica |
Abstract:
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Rainfall-induced flows and slides are hazardous processes in mountainous regions and suscep-tibility assessments with resulting maps are helpful tools for land-use planners. In the present study, all the available information on recent events has been gathered and incorporated in an inventory. The governing fac-tors of the 2262 entries were analyzed and preliminary susceptibility matrices were established. Two different terrain units were applied and compared: grid cells and first-order catchments. The results showed that slope angle between 30 and 35º and land cover classes like debris screes or grassland are the most significant fac-tors. In addition, the Melton Ratio higher than ~0.7 in the first-order catchments seems to be another critical parameter. Finally, two types of susceptibility maps were created, although the ones working with first-order catchments look more appropriate for the application at regional scale and the use for land-use planning. |
Subject(s):
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-Àrees temàtiques de la UPC::Enginyeria civil::Geologia::Riscos geològics -Landslides--Risk assessment -Esllavissades -- Pirineus |
Rights:
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Document type:
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Article - Published version Conference Object |
Published by:
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CRC Press
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