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Aperçu de la ressource :


Auteurs :
Cossart, Etienne

Description :

International audience

Sediment generation and pathways, as influenced by post-glacial collapse of mountain slopes in particular, arestudied in three steps. First, the processes involved in rock failure are identified and their possible influence onmass-movement locations at different spatial scales in various places is discussed. This comparison reveals avariable pattern of paraglacial landslide distribution, and allows the local/regional controlling parameters to beidentified. Second, the rate of triggering of mass-movement over time is roughly assessed in various settingsbased on a review of recently published data. This comparison aims to identify typical temporal-models forslope evolution through the time elapsed since deglaciation. Third, an attempt is made to assess the contributionof landsliding to the whole paraglacial cascading system by evaluating the somewhat contradictory findingsand assertions from previous authors: Some authors have argued for a high sediment yield at catchment sinksin relation to paraglacial landsliding (Church & Ryder, 1972; Ritter & Ten Brink, 1986), whereas others haveidentified that some long-lived sediment dams can occur after the deposition of a landslide mass, so that no or littlesediment exportation occurs (Korup, 2009; Cossart & Fort, 2008). We add to this debate by developing a typologyof geomorphic couples, between paraglacial landslides and other geomorphic processes, and present simulationsof sediment yield evolution since glacier disappearance



Mots-clés :
paraglaciaire - flux sédimentaire - versant - glissement de terrain - roche - [SHS.GEO] Humanities and Social Sciences/Geography - [SDU] Sciences of the Universe [physics] - [SDU.STU] Sciences of the Universe [physics]/Earth Sciences - [SDU.STU.AG] Sciences of the Universe [physics]/Earth Sciences/Applied geology

Editeur :
HAL CCSD

Langue :
en

Type de document :
info:eu-repo/semantics/conferenceObject, Conference papers

Source :
Geophysical Research Abstracts; EGU General Assembly 2013; https://hal.archives-ouvertes.fr/hal-01260442; EGU General Assembly 2013, Apr 2013, Vienne, Austria. Geophysical Research Abstracts, p. 2618

Date :
2013-04-07

Contributeurs :
Pôle de recherche pour l'organisation et la diffusion de l'information géographique (PRODIG) ; Université Panthéon-Sorbonne (UP1) - Institut de Recherche pour le Développement (IRD) - École pratique des hautes études (EPHE) - Université Paris-Sorbonne (UP4) - Université Paris Diderot - Paris 7 (UPD7) - Centre National de la Recherche Scientifique (CNRS)

Identifiants :
hal-01260442
https://hal.archives-ouvertes.fr/hal-01260442

Couverture :

Vienne, Austria