Rock cliffs hazard analysis based on remote geostructural surveys: The Campione del Garda case study (Lake Garda, Northern Italy)

The town of Campione del Garda (located on the west coast of Lake Garda) and its access road have been historically subject to rockfall phenomena with risk for public security in several areas of the coast. This paper presents a study devoted to the determination of risk for coastal cliffs and the d...

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Bibliographic Details
Published in:Geomorphology (Amsterdam, Netherlands) Netherlands), 2011-02, Vol.125 (4), p.457-471
Main Authors: Ferrero, A.M., Migliazza, M., Roncella, R., Segalini, A.
Format: Article
Language:English
Subjects:
Campione del Garda
case studies
Cliffs
coasts
computer software
Earth sciences
Earth, ocean, space
Engineering and environment geology. Geothermics
Exact sciences and technology
Geomorphology, landform evolution
hazard characterization
Hazards
kinematics
Lakes
Marine and continental quaternary
Natural hazards: prediction, damages, etc
Northern Italy
photogrammetry
Remote geostructural survey
Risk
Risk analysis
Rock
Rockfall
Rockfall hazard
rockfalls
Slopes
Surficial geology
Surveys
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Summary:The town of Campione del Garda (located on the west coast of Lake Garda) and its access road have been historically subject to rockfall phenomena with risk for public security in several areas of the coast. This paper presents a study devoted to the determination of risk for coastal cliffs and the design of mitigation measures. Our study was based on statistical rockfall analysis performed with a commercial code and on stability analysis of rock slopes based on the key block method. Hazard from block kinematics and rock-slope failure are coupled by applying the Rockfall Hazard Assessment Procedure (RHAP). Because of the huge dimensions of the slope, its morphology and the geostructural survey were particularly complicated and demanding. For these reasons, noncontact measurement methods, based on aerial photogrammetry by helicopter, were adopted. A special software program, developed by the authors, was applied for discontinuity identification and for their orientation measurements. The potentially of aerial photogrammetic survey in rock mechanic application and its improvement in the rock mass knowledge is analysed in the article.
ISSN:0169-555X
1872-695X
DOI:10.1016/j.geomorph.2010.10.009