Assistant in the Geomatic and risk analysis institute (IGAR) and Geophysical institute (IG), University of Lausanne

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1 Who am I? That is the question Travelletti Julien Nationality: Swiss Date of birth: Master in engineering geology, University of Lausanne, Switzerland, 2007 «Large-scale landslide and debris flow development on weathered gypsum» Assistant in the Geomatic and risk analysis institute (IGAR) and Geophysical institute (IG), University of Lausanne Severals internships in geological offices Inventory and mapping of natural hazards Quantifying of landslide movements on SIG Calibration for rockfall trajectory Travelletti, J., Jaboyedoff, M, Baumgartner, L., Oppikofer, T., (in review): Debris flow development on weathered gypsum: soil characterisation and its influence on slope stability. Physics and Chemistry of the earth. Travelletti, J., Demand, J., Marillier, F., Jaboyedoff, M., (in progress): Seimic profiling combined with the sloping local base level method for the study of the Bois de la Glaive landslide. Landslide.

2 Motivation Personal Professional Skills developments Skills applications Moving - Discover new regions, people - Open-mindedness - Ability to adapt - Hillslope processes on unconsolidated fields - Learning and applying recent methods, new principles and softwares in risk assessment - Numerical modelling - Intensives courses, workshops on thematic in various domains concerning mountain risks - Interdisciplinary methods - Personal knowledge application - Comparison with differents approaches on natural hazards - Exchange with others institutes (EPFL, UNIFI) - Contacts with others researchers - Knowledge interactions

3 Quantitative analysis of landslide hazards and risks in clay-shale catchments Supervisors : Research project Dr. Jean-Philippe Malet, Dr. Anne Puissant, Prof. Olivier Maquaire at UCBN Pr. Lyesse Laloui at EPFL and Dr. Filippo Catani at UNIFI disasters Lessons from past WB1 HAZARD ANALYSIS Transfer of knowledge RISK GOVERNANCE Process characteristics Hazard maps 5 MOUNTAINS Barcelonnette STUDY AREAS Transfer of knowledge criteria for risk assessment Sustainable development planning Transfer of knowledge WB2 QUANTITATIVE RISK ASSESSMENT Risk maps & scenarios RISK MANAGEMENT

4 Study sites South French Alps Ubaye Valley Barcelonnette Basin slow-moving mudslides and debris flows - Poche -Super Sauze -La Valette Google Map Google Earth

5 objectives Short and long term characterisation of the movements Conceptual models (3D geometry, morphostructural, kinematics, geotechnics, geophysics) Hydrological and hydro mechanical modelling (long term= slow movement; short-term = crises) - Geomorphology -Geology - Geophysics (seismic and electricity) - Hydro-geotechnic tests - Remote sensing -DEM analysis - Artificial neural network analysis -Numerical and statistical modelling (Flac, GefDyn, PcRaster) multi-source monitoring datasets Early warning Characterisation of predisposing factors (morpho-structural) Triggering factors Identification of important events Event simulation Assessment of the vulnerability of the exposed elements Deepen the understanding of the physical mechanisms controlling mudslides Quantification of the hazard level (intensity, spatial and frequency analysis) Different scenarios of risk including climate change and land occupation

6 Examples -Super Sauze : Rainsimulation Geochemistry, geophyics, hydrology morphology, deformation monitoring X,Y,Z High resolution DEM - La Valette : geophysical investigation Small scale behaviour? Large scale Piezometers displacement

7 Collaborations Main Mountain Risk collaborators Pr. Lyesse Laloui Soil Mechanics Laboratory Dr. Filippo Catani Department of Earth Sciences Picture Dorine Etienne Others collaborators IPGS, Strasbourg : P. Sailhac ANR, Orléans : G. Grandjean IGAR : M. Jaboyedoff LIV, Strasbourg : A. Puissant Faculty of Geosciences: T. van Asch T. Bogaard, D. Pradzynskas Hydrogeology laboratory : C. Emblanch LST, Lyon : C. Delacourt, P. Allemand

8 Statistical modelling Climate change Geotechnics Geomorphology Mountain-Risks so, a lot to do! Remote sensing Numerical modelling Risk assessment Triggering factors Monitoring Hazard analysis Geology Geophysics Morpho structural