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Topic 2 - Predicting large landslide phenomena

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HAZARD ASSESSMENT OF A POTENTIAL ROCK AVALANCHE IN SOUTH TYROL, ITALY: 3D MODELING AND RISK SCENARIOS by Giulia Bossi - CNR-IRPI – National Research Council of Italy, Research Institute for Hydro-Geological Hazard Protection - Padova, Italy Simone Frigerio - CNR-IRPI – National Research Council of Italy, Research Institute for Hydro-Geological Hazard Protection - Padova, Italy Matteo Mantovani - CNR-IRPI – National Research Council of Italy, Research Institute for Hydro-Geological Hazard Protection - Padova, Italy Luca Schenato - CNR-IRPI – National Research Council of Italy, Research Institute for Hydro-Geological Hazard Protection - Padova, Italy Alessandro Pasuto - CNR-IRPI – National Research Council of Italy, Research Institute for Hydro-Geological Hazard Protection - Padova, Italy Gianluca Marcato - CNR-IRPI – National Research Council of Italy, Research Institute for Hydro-Geological Hazard Protection - Padova, Italy DOI: 10.4408/IJEGE.2013-06.B-19 A large DSGDS (Deep-Seated Gravitational Slope Deformation) which extends on an area of 3.75 km2 affects the southwest flank of Mount Ganderberg some 40 km north of Bolzano. The gravitational sagging of the slope is generating a wide field of tension cracks in the crown area where a rock slab of about 800.000 m3 shows clear precursory signs of possible detachment. In 1401 a rock avalanche detaching from the same area dammed the Passer River thus creating a 35 m deep lake which through sequential breaching Preview | Download Read More...
AVERTING PREDICTED LANDSLIDE CATASTROPHES: WHAT CAN BE DONE? by Tim Davies - University of Canterbury - Department of Geological Sciences - Private Bag 4800 - Christchurch, New Zealand DOI: 10.4408/IJEGE.2013-06.B-20 Today landslide science is more complete than at the time of the Vajont catastrophe, although some way from being perfect. However, a factor is still present that allowed the Vajont disaster, and a number of other catastrophes since, to occur - organisational and governmental reluctance to acknowledge the unacceptably high probability of a specific disaster and take actions to avert it. At three tourism centres in New Zealand there is substantive evidence that a large landslide can be triggered by an earthq Preview | Download Read More...
ESTIMATION OF THE WATER WAVES GENERATED BY THE LANDSLIDE IN THE GRIJALVA RIVER, MEXICO, 2007 by Jersain Gómez Núñez - Universidad Nacional Autónoma de México - Instituto de Ingeniería - Ciudad Universitaria, D.F, México, C.P. 04510 Verduzco Moisés Berezowsky - Universidad Nacional Autónoma de México - Instituto de Ingeniería - Ciudad Universitaria, D.F, México, C.P. 04510 DOI: 10.4408/IJEGE.2013-06.B-21 Large-scale water waves generated by landslides are one of the most dangerous events in reservoirs. Although the probability of occurrence is low, the consequences can be catastrophic as historical events have shown. The process of generation of the water waves is very complex, and has been studied with the aid of analytical, computational and physical models; empirical equations to estimate the characteristics of the water waves have been obtained depending on the parameters of the landslide. The paper pre Preview | Download Read More...
HAZARD AND RISK CLASSIFICATION FOR LARGE UNSTABLE ROCK SLOPES IN NORWAY by Reginald L. Hermanns - Geological Survey of Norway (NGU) - Trondheim, Norway Thierry Oppikofer - Geological Survey of Norway (NGU) - Trondheim, Norway Einar Anda - Åknes Tafjord Beredskap Lars H. Blikra - Geological Survey of Norway (NGU) - Trondheim, Norway Martina Böhme - Geological Survey of Norway (NGU) - Trondheim, Norway Halvor Bunkholt - Geological Survey of Norway (NGU) - Trondheim, Norway Giovanni B. Crosta - University of Milano-Bicocca - Milan, Italy Halgeir Dahle - Norwegian Road Authorities Graziella Devoli - Norwegian Road Authorities Luzia Fischer - Geological Survey of Norway (NGU) - Trondheim, Norway Michel Jaboyedoff - University of Lausanne - Lausanne, Switzerland Simon Loew - ETH Zurich - Zurich, Switzerland Stine Sætre - The county of Møre og Romsdal Freddy Xavier Yugsi Molina - Geological Survey of Norway (NGU) - Trondheim, Norway DOI: 10.4408/IJEGE.2013-06.B-22 We present a classification system for hazard and risk that is posed by unstable rock slopes in Norway that might undergo catastrophic failure in future and can cause loss of life. The system is scenario-based as the intensity and rate of displacement, as well as the geological structures activated by the sliding rock mass vary significantly on the slopes. In addition, for each scenario the secondary effects, such as generation of displacement waves or landslide damming of valleys with the potential of late Preview | Download Read More...
UNDERSTANDING LONG-TERM SLOPE DEFORMATION FOR STABILITY ASSESSMENT OF ROCK SLOPES: THE CASE OF THE OPPSTADHORNET ROCKSLIDE, NORWAY by Reginald L. Hermanns - Geological Survey of Norway (NGU) - Trondheim, Norway Thierry Oppikofer - Geological Survey of Norway (NGU) - Trondheim, Norway Halgeir Dahle - Norwegian Road Authorities, Norway Trond Eiken - University of Oslo - Oslo, Norway Susan Ivy-Ochs - ETH Zurich- Zurich, Switzerland Lars H. Blikra - Åknes Tafjord beredskapsenteret IKS, Norway DOI: 10.4408/IJEGE.2013-06.B-23 The Oppstadhornet rockslide is a 10 Mm3 slide that occurs on the island of Otrøya in westernmost Norway. Terrestrial cosmogenic nuclide dating indicates that the Oppstadhornet rockslide became active ca. 16.6-14.2 kyrs ago when the retreat of the Scandinavian ice sheet exposed the island from the continental ice cover. Sliding along the main sliding surface was active during the late Pleistocene and Holocene. Our data suggest that the paleo-slip rate in the Late Pleistocene was slightly faster than in the Preview | Download Read More...
THE BERILL FAULT AND ITS RELATION TO A DEEP SEATED GRAVITATIONAL SLOPE DEFORMATION (DSGSD) by Ingvar Krieger - University of Erlangen-Nuremberg - GeoZentrum Nordbayern - Erlangen, Germany Now Isofer AG - Knonau, Swizzerland Reginald L. Hermanns - Geological Survey of Norway - Trondheim, Norway Markus Schleier - University of Erlangen-Nuremberg - GeoZentrum Nordbayern - Erlangen, Germany Freddy Xavier Yugsi Molina - Geological Survey of Norway - Trondheim, Norway Thierry Oppikofer - Geological Survey of Norway - Trondheim, Norway Jan Steinar Rønning - Geological Survey of Norway - Trondheim, Norway Trond Eiken - University of Oslo - Oslo, Norway Joachim Rohn - University of Erlangen-Nuremberg - GeoZentrum Nordbayern - Erlangen, Germany DOI: 10.4408/IJEGE.2013-06.B-24 Within the Innfjorddalen valley (Møre og Romsdal, Norway) a 1.5 km long linear NNE-SSW striking feature, forming a 3-4 m high step in the topography, occurs on the SE facing slope of the Middagstinden mountain and was previously discussed as a Holocene reverse fault, called the "Berill fault". Our intense structural field mapping and a high resolution digital elevation model based on LiDAR data derived from airborne and terrestrial laser scanning indicate that the "Berill fault" is a normal fault that has Preview | Download Read More...
LARGE LANDSLIDE RISK ASSESSMENT IN HILLY AREAS. A CASE STUDY OF HUŞI TOWN REGION (NORTH-EAST OF ROMANIA) by Mihai Ciprian Margarint - "Alexandru Ioan Cuza" University of Iaşi - Department of Geography - Blvd. Carol I, 20 A - Iaşi, Romania Doru Toader Juravle - "Alexandru Ioan Cuza" University of Iaşi - Department of Geography - Blvd. Carol I, 20 A - Iaşi, Romania Adrian Grozavu - "Alexandru Ioan Cuza" University of Iaşi - Department of Geography - Blvd. Carol I, 20 A - Iaşi, Romania Cristian Valeriu Patriche - Romanian Academy, Department of Iaşi - Geography Group - Blvd. Carol I, 8, Iaşi, Romania Mădălina Pohrib - “Gh. Asachi” Technical University of Iaşi - Blvd. D.Mangeron, 67 - Iaşi, Romania Iulian Cătălin Stănga - "Alexandru Ioan Cuza" University of Iaşi - Department of Geography - Blvd. Carol I, 20 A - Iaşi, Romania DOI: 10.4408/IJEGE.2013-06.B-25 Large landslides are a common geomorphological characteristic of the Moldavian Plateau (Romania), their presence and manifestation being favored mainly by geological and climatic conditions. In numerous cases, the spatial pattern of the large landslides is under the form of amphitheatres, with impressive dimensions, reaching sizes of hundreds of hectares. Due to their defensive characteristics, these landforms often constituted sites for settlements location during the Middle Ages. The constant growing of t Preview | Download Read More...
LARGE VOLUME LANDSLIDES IN THE CENTRAL ANDES OF CHILE AND ARGENTINA (32º-34ºS) AND RELATED HAZARDS by Sergio A. Sepúlveda - Universidad de Chile - Departamento de Geología - Santiago, Chile Stella M. Moreiras - CONICET – IANIGLA (CCT) - Mendoza, Argentina DOI: 10.4408/IJEGE.2013-06.B-26 Large landslides are a common geomorphological feature of the Central Andes of Chile and Argentina. The highlands usually present landslide relicts of different types and volumes located in glacial valleys, including outsized rock slides and avalanches of millions of cubic metres up to cubic kilometres of volume. Even though the main trigger mechanisms of these events are not clear yet, being mostly interpreted as seismic in Chile and ambiguously climatic or seismic in Argentina, there is no doubt about the Preview | Download Read More...
“REMOTE” LANDSLIDE-RELATED HAZARDS AND THEIR CONSIDERATION FOR DAMS DESIGN by Alexander Strom - Geodynamics Research Center - Branch of JSC “Hydroproject Institute” - Moscow, Russia Anatoly Zhirkevich - JSC “Hydroproject Institute” - Moscow, Russia DOI: 10.4408/IJEGE.2013-06.B-27 The 1963 Vajont disaster highlighted the importance of slopes stability analysis not only directly at the dam sites but also in the reservoir areas to ensure hydraulic projects safety. However, catastrophic collapse of huge rock/soil mass into reservoir does not exhaust negative effects of landslides that must be taken into consideration in the course of dams design. Severe consequences might result from river channel landslide damming both downstream from the dam site and far upstream from the reservoir. T Preview | Download Read More...


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