Design of a pseudo-3D topographic analysis computer program: COLTOP-3D

Report of activity

 

03.12.2004
Applicazione dei DEM all’analisi delle dinamiche di versante (PDF), M.Jaboyedoff. Alpe Adria meeting 2004: Nuove tecnologie e prevenzione dei dissesti idrogeologici: un aiuto dai modelli numerici del terreno. SUPSI, Lugano.

12-14.10.2004, 08-09.10.2003
Cours sur les instabilités de versants : éboulements. Dans le cadre de la formation postgrade internationale en géologie de l'ingénieur et de l'environnement, GEOLEP, EPFL, Lausanne (Suisse). Par M. Jaboyedoff (as subcontractor for CREALP).
Related documents: Short course, Randa article abstract.

15.06.2004 , 22.03.2004

MNAs laser et risques naturels. Dans le cadre du cours: Les Modèles Numériques d’Altitude llaser et leurs appllications dérivées, LASIG-EPFL – Laboratoire de systemes d’information geographique EPFL. Par M. Jaboyedoff.

28.05.2004

Utilisation du MNT25 et du DTM-laser pour l'analyse des instabilités de versant : méthodes et perspectives. Séminaire : exploitation des SIG et des MNT par balayage laser et radar dans le domaine des dangers naturels. Vendredi 28 mai 2004 13h30 - 17h30. LASIG-EPFL – Laboratoire de systemes d’information geographique EPFL. Par Michel Jaboyedoff

16.04.2004

Learning from the 30 M m3 Randa rockslide (Switzerland) for rockfall hazard assessment (Abstract). GOLDSCHMIDT LECTURE SERIES in Trondheim, Norway, Friday, 16. april, 1 pm. , by Dr. Michel Jaboyedoff

 

 

EGU - European Geosciences Union second General Assembly 2005, Vienna, Austria, 24 - 29 April 2005

GEOQUEBEC, 24-27 October Octobre 2004, Québec, 57th CANADIAN GEOTECHNICAL CONFERENCE

The Geological Society of London William Smith Meeting, 4th & 5th October 2004 - Burlington House, London: Earth’s Dynamic Surface – Catastrophe and Continuity In Landscape Evolution.

NH3.11 Terrain analysis using DTM and landslides (co-listed in GM)
Convener: Jaboyedoff, M. and Co-Convener: Couture, R.; Derron, M.

EGU - 1st General Assembly Nice, France, 25 - 30 April 2004

NH3.07 Terrain analysis using DTM and landslides

Convener: Jaboyedoff, M. and Co-Convener(s): Couture, R.

Terrain analysis is one of the new challenges of the hazard assessment, knowing the rapid increase in availability and in precision of DTM. Geology plays a great role on geomorphology, a fine analysis of DTM permits to outline the structure and geology of a poorly known region and also to systematically analyze known regions. Several landslide and erosion areas can be detected by simple or more sophisticated DTM analysis. Modelling of landslides and erosion processes are dependent on the DTM quality. This is a basic challenge for the future research of erosion processes study and hazard assessment.

NH3.08 Modelling landslides as part of erosive processes

Convener: Jaboyedoff, M. and Co-Convener(s): Couture, R.

Landslides are part of the erosion processes. Quantification of erosion is important, because its understanding as part of geodynamics has a great importance for hazard assessment. The relationships of particular geodynamic contexts give information on the velocity of the erosive processes. Thus the questions are: where are located preferentially the landslides? And what are the importance of the mass flux ratio down to the sea level (or below) of the landslides versus others erosive processes.

• 9th International symposium on Landslides RIO June 28 to July 2, 2004
• Workshop on Wet Granular Material in Movement Flow from nano to macro-particles.
  EPFL, Lausanne, February 5, 2004.
• Debris-Flow Hazards Mitigation: Mechanics, Prediction and Assessment, Conference on September 10-12, 2003. At Congress Center, Davos, Switzerland.
• EGS-AGU-EUG, Joint Assembly, Nice, France, 06 - 11 April 2003

Quanterra Project - 01:

 

Project Proposal (pdf version)

Project Abstract

The design of a program of topographic analysis based on digital elevation model (DTM) is presented here. This software COLTOP-3D can be used to analyze the structures, especially faults, shaping the morphology. Maps as well as stereonets displaying colors depending on the orientation will be implemented. Histograms of topographic surface are planned. The design of tools useful to analyze topography in a structural way is planned. Faults tracing will be implemented based on orientation and surface points. The functions and the main points of the project are presented.

 

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Report on the project COLTOP3D for March 2003: Stay of Michel Jaboyedoff at GSC - Ottawa by M. Jaboyedoff and R. Couture (pdf: Including project proposal)

Link: Geological Survey of Canada - Commission géologique du Canada

Introductive abstract

Preliminary remark

This document is a report of the stay of M. Jaboyedoff (Quanterra) at the Geological Survey of Canada (GSC) in Ottawa during March 2003. Appendixes are added to the report in order to have a complete file of this project, continuation of this project will lead to further documents (e.g. future activity report, publications). 1.2 Generalities Quanterra is an organization being created, which deals with natural hazards in mountainous areas. The beginning of its activity is dedicated to initiating projects and taking contacts with groups of research of high level, especially in slope instability hazard assessment. The GSC developed activity in this research topic since several years, which is demonstrated by the Canada Landslide Project (formerly the Canadian Landslide Loss Reduction Program) within the NRCAN's Natural hazards and Emergency Response Program. During the Annual Assembly of the European Geophysical Society meeting in Nice in April 2002 Dr. Réjean Couture (GSC) and Dr. M. Jaboyedoff (Quanterra) decided that collaboration between both organizations could be fruitful. At the end of 2002 a proposal of project (Appendix II), mainly financed by Quanterra, was submitted to R. Couture and Dr. P. Bobrowsky. They both agreed with the project. Thus a stay for March 2003 was planned and realized, a computer and an office was supply to M. Jaboyedoff. An amount of 2,000 $CAN was paid by the GSC to M. Jaboyedoff for accommodation and expenditures accordingly to the Treasury Board of Canada's regulations.

Objectives of the visit

The primary objective of this stay was to write a prototype of the program COLTOP3D dedicated to digital terrain model (DTM) analysis and visualization (Appendix II). Some well-known rock slope instabilities from the Canadian Rocky Mountains were used to test the capabilities of the program. This goal was achieved during the stay. M. Jaboyedoff and GSC landslide group of research benefited of several stimulating discussions and ideas of project. Also, M. Jaboyedoff gave a presentation at Geological Survey of Canada - Quaternary Discussion Group.