11 octobre 2021, 13h amphithéâtre du CRPG | Marius Huber (CRPG)
Dynamics of giant landslides and their contribution to Himalayan erosion
Summary : Mountain ranges are affected by deep-seated landsliding which displays extremely variable sizes and rates of evolution, including rapidly failing rock slides and slow moving Deep-Seated Gravitational Slope Deformations (DSGSDs). The mechanics and kinetics of deep-seated landsliding remain relatively unknown, especially in the Himalayas, despite the fact that they represent a source of natural hazards and a major contribution to long term mountain erosion. The aims of the thesis is to investigate deep-seated landslides, whether they are very slow and of progressive nature, or fast moving and of catastrophic character, by using isotopic dating techniques and comparing their structural prerequisites with numerical models. This will lead to a better understanding of the causes and the evolution of deep-seated landslides, and will allow more insight into deep-seated landslide hazard, as well as into their consequences for erosion of mountain ranges.