Category Archives: Uncategorized

Ryan Kromer – visiting scientist in the RISK group

Ryan Kromer is PhD graduate of Queen’s University and a post doctoral researcher at the Colorado School of Mines. He was a visiting PhD student at the University of Lausanne during 2015 and 2016 and is now visiting the Risk group from April to June 2019. During his visit, he will be conducting research on automated monitoring of landslides using terrestrial LiDAR and photogrammetry. The research visit is supported by the Herbette Foundation. Ryan is looking forward to another fruitfull visit with the group.

Inspection of the Brenva spur (Mt Blanc, Italy)

In collaboration with the Fondazione Montagna Sicura, Michel Jaboyedoff, Antoine Guerin and Li Fei went to Entrèves (Aosta Valley, Italy) on 23 October 2018 to investigate the 1997 Brenva rockslide scar (3’870 m, Mont-Blanc massif), which reactivated in September 2016. A helicopter flight of about 25 minutes allowed acquiring hundreds of pictures (digital and thermal) of the rock mass in exceptional conditions, as the high mountain was dry in late autumn 2018. A high-resolution Structure-from-Motion model was then generated using these pictures, allowing us to analyze in detail the structural features and rockfall activity of the Sperone della Brenva.

View of the Mt BLanc and Brenva spur


3D point cloud model obtained by photogrammetry

MOOC reaches 11,000 + enrollments

The Massive Open On-line Course (MOOC), “Disasters and Ecosystems: Resilience in a Changing Climate”, co-developed by the United Nations Environment Programme and UNIL-ISTE researcher Dr. Karen Sudmeier has reached over 11,000 enrollments from 183 countries from around the world. The MOOC is targeting disaster, development and environment professionals and students and is a free of charge course currently in its 6th week, with 9 more weeks to go. Enrollments are still open and can be accessed at: https://iversity.org/en/courses/disasters-and-ecosystems-resilience-in-a-changing-climate

Fête des Sciences de la Terre Lausannoises

Le 17 janvier 2015 dès 8h30 (ou 11h30)

Image des Dents du Midi B. Matasci (COLTOP-3D)

dent_midi

Le comité des anciens de l’institut des Sciences de la Terre de l’Université de Lausanne vous invite pour

une journée de rencontre des actuel(le)s et ancien(ne)s étudiant(e)s, collaborateur(trice)s, docteurs, doctorant(e)s et enseignant(e)s dans le nouveau bâtiment de l’Institut des Sciences de la Terre – GEOPOLIS

IMG_5476
Pour avoir accès aux photos de la journée, veuillez nous contacter.

PROGRAMME DU 17 JANVIER 2015

Avec le soutien de :

pangeaunil_logo

  • 8h30 : Accueil des personnes participant aux conférences (GEOPOLIS 1612)
  • 9h : Conférence programme
    • Prof Dan Marshall (University of Simon Fraser, Canada): L’énigme de l’émeraude zonée
    • Sophie Paychere(GUL): Haïti, Terre cassée ?
    • Gabriele Bianchetti (Directeur ALPGEO): Parcours d’un géologue “mouillé” et exemple d’un projet de géothermie profonde
  • 10h30 Pause-Café
    • Nhung Agustoni-Phan (GUL): La géologie ouvre les portes
    • Pauline Baland (swisstopo): 10 ans après… de la géologie à la cartographie géologique
    • Prof. Arthur Escher (GUL): Le passé et l’avenir du genre humain
  • 11h30 accueil des personnes ne participant pas aux conférences (GEOPOLIS)
  • 12h00 Début du buffet
  • Menu
    • Menu
      Mix de salades composées
      Plateaux de terrines
      Planchettes de viande froide
      ****
      RACLETTE
      ****
      Meringues et crème
      eaux et vins compris
  • Dès 15h visite du bâtiment GEOPOLIS possible

Contact :

Anne-Marie Magnenat (021 646 31 93; ammagnenat@bluewin.ch)

Anne-Marie Chagros (021 692 43 00, en cas d’absence rappelez ; Anne-Marie.Chagros@unil.ch)

Accès: -> carte

Prière de confirmer votre venue et si vous êtes accompagnés

Participation demandée 70.- CHF/pers. (pour étudiant(e)s actuel(le)s 30.- CHF et 40.- CHF doctorant(e) actuel(le)s) à verser à :

Pangea ; Ass. des étudiants en Sciences de la Terre de l’Uni. Lausanne ; 1015 Lausanne ; CH58 0900 0000 1755 5678 3 ; CCP : 17-555678-3

jusqu’au 15 décembre 2014.

Rappel : Si nous avons oublié quelqu’un n’hésitez pas à le ou la contacter.

Erosion monitoring – Project Roubinette is operational

The Institute of Earth Sciences is monitoring erosion dynamics in a study site in Draix (SE France), in cooperation with several other research groups, as part of Benjamin Rudaz’ PhD project, and in continuation of previous studies (A. Loye, P. Béchet, J. Duc).

This region is characterized by black marls outcrops, wheathered and eroded by the alpine mediterranean climate, resulting in a pluricentimetric annual erosion rate, which can be quantified and observed through high-resolution LiDAR-acquired DTMs. LiDAR campaigns began in 2007 for the Roubine catchment (~1400 m2), and thanks to a research grant from the Herbette Foundation, it will continue and develop on the Roubinette, a first-order gully of 140 m2 situated right by the Roubine.

The goals of this new research is to increase the precision when comparing LiDAR scans, by removing the vegetation, scanning from a higher position and combining LiDAR and photogrammetric methods.

Higher scanning position has been achieved with a 4 meters steel-beam tower, on top of which sits the LiDAR pad. This allows the scanner to view nearly 100% of the incised terrain. Also perched on the tower are 2 Harbotronics time-lapse packages, taking high-quality digital photograph every hour during the day. Their separation, as with human eyes, will allow 3D reconstruction of the terrain, on an hourly basis. This will complement LiDAR scans, which can be only done every few months. Finally, the setup is accompanied by a meteorological station, soil humidity sensors, and a concrete sediment catch which captures the outgoing water and sediments.

The installation was finalized during a field trip in march 2014, and is thus now fully operational. Stay tuned for future exciting results!

 

Pièce jointeRoubinette tower from catchment summit