TESTING A LANDSLIDE-GENERATED TSUNAMI MODEL. THE CASE OF THE NICOLET LANDSLIDE (QUÉBEC, CANADA)

Martin Franz, Michel Jaboyedoff, Jacques Locat, Yury Podladchikov

In the proceedings of: GeoQuébec 2015: 68th Canadian Geotechnical Conference & 7th Canadian Permafrost Conference

Session: Landslides and Slope Stability III / Mouvements de terrain et stabilité des pentes III

ABSTRACT: In order to assess comprehensively landslide-triggered tsunamis and the induced risks, we have developed a numerical model which simulates this phenomenon. In order to confirm its capacity to be used as a predictive tool for risk assessment, the model is tested on a real case. The Nicolet landslide (Québec, Canada) occurred on the 8 May 2006 on the Nicolet Sud-Ouest River located in the center of the St-Laurence Lowland. This partially submerged landslide has a 3. The slide led to a wave and the resulting horizontal run-up distance reached 60 meters on the opposite shore (clearly identifiable on an aerial). The results of our model fit well with the real case, which indicate its ability to simulate such phenomenon and thus confirm its validity.

RÉSUMÉ: es tsunamis générés par glissement de terrain et les risques associés, nous avons développé un modèle numérique capable de simuler un tel phénomène. Pour confirmer sa capacité à être utilisé e, le modèle est testé sur un cas réel. Le glissement Nicolet (Québec, Canada) a eu lieu le 8 mai 2006 au bord de la rivière Nicolet située au centre des basses terres du Saint-Laurent. Ce glissement partiellement submergé qui, en débordant, a pénétré de 60 m sur la berge opposée (clairement identifiable sur une photo aérienne). de notre modèle correspondent bien avec le cas réel, ce qui prouve sa capacité à simuler un tel phénomène et ce qui confirme sa validité.

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