Detailed assessment of the deep-seated gravitational deformation at Stampa above Flåm, Norway

Détails

ID Serval
serval:BIB_32973BD5FF21
Type
Actes de conférence (partie): contribution originale à la littérature scientifique, publiée à l'occasion de conférences scientifiques, dans un ouvrage de compte-rendu (proceedings), ou dans l'édition spéciale d'un journal reconnu (conference proceedings).
Collection
Publications
Institution
Titre
Detailed assessment of the deep-seated gravitational deformation at Stampa above Flåm, Norway
Titre de la conférence
Landslides and engineered slopes: Protecting society through improved understanding
Auteur⸱e⸱s
Böhme M., Hermanns R.L., Fischer L., Oppikofer T., Bunkholt H.S.S., Derron M.-H., Carrea D., Jaboyedoff M., Eiken T.
Editeur
CRC Press
ISBN
978-0-415-62123-6
Statut éditorial
Publié
Date de publication
2012
Editeur⸱rice scientifique
Eberhardt E., Froese C., Turner K., Leroueil S.
Pages
647-652
Langue
anglais
Résumé
The unstable rock slope above the village of Flåm shows signs of active
and postglacial gravitational deformation over an area of 11 km2.
We performed detailed structural field mapping, annual differential
Global Navigation Satellite System (GNSS) surveys, and generated
a detailed topographic model based on airborne and terrestrial laser
scanning. Kinematic analyses of the structural data indicates that
deformation is complex and varies over the slope. Both sliding and
toppling are locally feasible. Using differential GNSS, 18 points
were measured annually over a period of up to 6 years. Two of these
points show an average yearly movement of around 10 mm/year. They
are located at the frontal cliff on almost completely detached blocks.
Large fractures indicate deep-seated gravitational deformation of
volumes up to 80 million m3, but the movement rates in these areas
are below 2 mm/year. Based upon these combined observations, we interpret
that small collapses of blocks along the frontal cliff will be more
frequent. Larger collapses of free-standing blocks along the cliff
with volumes >100,000 m3, thus large enough to reach the fjord, cannot
be ruled out. A large collapse involving more than 10 million m3,
however, is of very low likelihood at present.
Création de la notice
25/11/2013 16:26
Dernière modification de la notice
20/08/2019 13:18
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