All posts by Mariam Ben Hammouda

Risk group @ EGU 2019 in Vienna, Austria

Like every year, The European Geosciences Union (EGU) General Assembly in Vienna 2019 (7 – 12 April) was a great opportunity for our Risk Group to present recent researches and to interact with the international and multidiscipline platform of experts and scientists.

This assembly was a record-breaking meeting, with 16,250 presentations: 5,531 orals, 9,432 posters, and 1,287 PICOs. The program featured 683 unique scientific sessions together and received 16,273 scientists from 113 countries.

The Risk Group members presented 10 contributions as first authors whose titles are below.

2 Orals:

8 Posters:

Risk group @ EGU 2018 in Vienna, Austria

The Risk Group participated in the European Geosciences Union (EGU) General Assembly in Vienna, Austria, on 08 April to 13 April 2018. This meeting was a great success, with 4,776 oral, 11,128 posters, and 1,419 PICO presentations. 15,075 scientists from 106 countries participated.

As usual, attending The European Geosciences Union (EGU) General Assembly in Vienna is an amazing opportunity for our group to be an interactive part with the huge platform of experts and scientific researchers from over the world and from different fields. The Risk Group people presented 10 contributions as first authors whose titles are below.

1 Oral

  • Optimizing rockfall simulations by combining high-resolution gridded digital terrain models with 3D point clouds. François Noël et al.

1 Pico

  • Using average velocities of deep-seated landslides to develop intensity-frequency scenarios. Michel Jaboyedoff et al.

8 Posters

  • Coupling 3D rockfall propagation to the spatio-temporal frequency for a realistic rockfall hazard mapping. Cécile D’Almeida et al.
  • SFM photogrammetry for rockfall hazard evaluation in a zero data site (acase study of a touristic area of northern Tunisia). Mariam Ben Hammouda et al.
  • Urbanized areas, natural hazard and risk in Rwanda. Emmanuel Nduwayezu et al.
  • Axisymmetric granular collapse: underlying invariance of granular dynamic? Emmanuel Wyser et al.
  • Inventory of shallow landslides in regard with their frequency in the Canton of Vaud (Switzerland). Cedric Meier et al.
  • Finding the best locations of monitoring devices based on visibility analysis with 3D point clouds. Teresa Gracchi et al.
  • Practical application of an open-source, web-GIS platform (RISKGIS) in learning risk management of geohazards. Zar Chi Aye et al
  • Assessment of potential pollution of an unconfined aquifer in Abidjan by hydrocarbons. Amenan Agnès Kouamé et al.




Risk Group at the 15th Swiss Geoscience Meeting in Davos, Switzerland

The 15th Swiss Geoscience Meeting, organized by the WSL-Institute for Snow and Avalanche Research SLF and the Platform Geosciences of the Swiss Academy of Sciences SCNAT, was held on 17th and 18th of November 2017 in Davos (Switzerland).

16 different sessions were planned during this meeting and the Risk Group members contributed to several presentations mainly in the “Progress in assessment of hazards and risks in mountain regions” session. Presentations are below:

5 Talks:

Aye Z.C., Artigue V., Jaboyedoff M., Derron M., Gerber C., Lévy S. An open-source webGIS platform for risk management of natural hazards in Canton Vaud

Derron M.-H., Rouyet L., Guerin A., Lefeuvre C., Jaboyedoff M. Imaging of non-gravitationnal movements in rock faces

Franz M., Rudaz B., Jaboyedoff M., Podladchikov Y. Coupling SLBL with shallow water model to assess landslide-generated tsunami hazard at Oeschinensee

Jaboydedoff M., Artigue V., Aye Z.C., Derron M.-H., Gerber C., Lévy S. From the average velocities of deep seated landslides to intensity-frequency scenarios

Noël F., Wyser E., Jaboyedoff M., Derron M. Real-size rockfall experiment: How different rockfall simulation impact models perform when confronted with reality?

8 Posters:

Meier C., Derron M., Jaboyedoff M., Gerber C., Artigue V. Inventory of shallow landslides in regards to their frequency in the Canton of Vaud (Switzerland

D’almeida C., Guerin A., Jaboyedoff M., Hantz D. Model and cartography of the Saint-Eynard cliff erosion by rockfalls

Wyser E., Jaboyedoff M. Dramatic granular impact(s): a plastic- or friction-dominated transition phase

Noël F., Wyser E., Jaboyedoff M., Derron M. Real-size rockfall experiment: A relatively simple method to acquire 3D impact characteristics from video footage

Nduwayezu E., Jaboyedoff M., Derron M.-H, Nsengiyumva J.-B., Twarabamenye E. Pression démographique et outils analyse d’aléas et risques gravitaires au Rwanda.

Ben Hammouda M., Jaboyedoff M., Derron M.H., Bouaziz B. Rockfall hazard evaluation in a touristic area of northern Tunisia using SFM photogrammetry in a zero data site

Voumard J., Derron M.-H., Jaboyedoff M. Characterization of natural hazard events affecting the Swiss transportation networks from 2012 to 2016

1 poster for the “Hydrology, Limnology and Hydrogeology” session:

Kouame A.A., Jaboyedoff M., Goola Bi Tie A., Derron M., Kouamé Kan J. Assessment of potential pollution of an unconfined aquifer in Abidjan by hydrocarbons

The full proceedings volume of VGC2016 is available at:

Korbous fieldtrip, Tunisia, November-December 2016

Mariam Ben Hammouda spent two months in Djbel Korbous which is an important relief dominating the south-eastern edge of the Gulf of Tunis (northern Tunisia).
This study area presents a special site of tourism and thermal therapy in Tunisia. Although, the main coastal road, which is the only access to the village, passes along a strongly weathered and affected cliff suffering of several instabilities (rockfalls, complex landslides and debris flows).

The aim of the research is a quantitative landslide risk assessment.It has been two years that Mariam started her PhD working on this cliff and this was the third time going to Korbous. She has applied the digital photogrammetry technique as a beginning to get the 3D model of the whole cliff (7Km) which was the major problem because of the lack of any available previous digital data. For this trip Mariam used the Optech IlRIS LiDAR to complete and improve her model.
Michel Jaboyedoff was there for three days and he met Samir Bouaziz, a structuralist and professor at the national engineering school of Sfax (Tunisia), in order to visit and evaluate the study area.

The work gathered the photogrammetry from a boat and LiDAR acquisitions, Gigapan acquisitions ( ;, fieldwork as fractures’ characterization and GPS topographic survey.