Experimental study of dense snow avalanches: velocity profiles in quasi-permanent and fully-developed flows
International audience In order to study channelled snow flows over rough surfaces, a laboratory scale experiment was installed at the col du lac blanc, a 2800 m high pass in the French Alps, near the Alpe d'Huez ski resort. It consists of a 0.2 m wide channel fed with snow by a motorized hoppe...
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ftccsdartic:oai:HAL:hal-02586331v1 2023-05-15T13:29:07+02:00 Experimental study of dense snow avalanches: velocity profiles in quasi-permanent and fully-developed flows Etude expérimentale des avalanches de neige dense : profils de vitesse d`un écoulement développé quasi-permanent Bouchet, Anne-Sophie Naaim, Mohamed Bellot, H. Ousset, F. Érosion torrentielle, neige et avalanches (UR ETGR (ETNA)) Centre national du machinisme agricole, du génie rural, des eaux et forêts (CEMAGREF) 2004 https://hal.inrae.fr/hal-02586331 en eng HAL CCSD International Glaciological Society hal-02586331 https://hal.inrae.fr/hal-02586331 IRSTEA: PUB00017067 ISSN: 0260-3055 Annals of Glaciology https://hal.inrae.fr/hal-02586331 Annals of Glaciology, International Glaciological Society, 2004, 38, pp.30-34 [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2004 ftccsdartic 2021-08-21T22:45:41Z International audience In order to study channelled snow flows over rough surfaces, a laboratory scale experiment was installed at the col du lac blanc, a 2800 m high pass in the French Alps, near the Alpe d'Huez ski resort. It consists of a 0.2 m wide channel fed with snow by a motorized hopper. Both the slope of the channel and the feeding rate of the hopper can be modified. Sensors in the channel provide measurements of the velocity profile, the flow height and the shear and normal stresses at the bottom of the flow. Velocity profiles for different slopes are presented in this paper. Results indicate the presence of a highly active layer at the bottom. This layer is mainly responsible for the avalanche velocity, while the upper layer has a much smaller velocity gradient. A first interpretation of both layers is given. Etude expérimentale des avalanches de neige dense : profils de vitesse d`un écoulement développé quasi-permanent. Article in Journal/Newspaper Annals of Glaciology Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Lac Blanc ENVELOPE(68.917,68.917,-49.217,-49.217) |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDE]Environmental Sciences |
spellingShingle |
[SDE]Environmental Sciences Bouchet, Anne-Sophie Naaim, Mohamed Bellot, H. Ousset, F. Experimental study of dense snow avalanches: velocity profiles in quasi-permanent and fully-developed flows |
topic_facet |
[SDE]Environmental Sciences |
description |
International audience In order to study channelled snow flows over rough surfaces, a laboratory scale experiment was installed at the col du lac blanc, a 2800 m high pass in the French Alps, near the Alpe d'Huez ski resort. It consists of a 0.2 m wide channel fed with snow by a motorized hopper. Both the slope of the channel and the feeding rate of the hopper can be modified. Sensors in the channel provide measurements of the velocity profile, the flow height and the shear and normal stresses at the bottom of the flow. Velocity profiles for different slopes are presented in this paper. Results indicate the presence of a highly active layer at the bottom. This layer is mainly responsible for the avalanche velocity, while the upper layer has a much smaller velocity gradient. A first interpretation of both layers is given. Etude expérimentale des avalanches de neige dense : profils de vitesse d`un écoulement développé quasi-permanent. |
author2 |
Érosion torrentielle, neige et avalanches (UR ETGR (ETNA)) Centre national du machinisme agricole, du génie rural, des eaux et forêts (CEMAGREF) |
format |
Article in Journal/Newspaper |
author |
Bouchet, Anne-Sophie Naaim, Mohamed Bellot, H. Ousset, F. |
author_facet |
Bouchet, Anne-Sophie Naaim, Mohamed Bellot, H. Ousset, F. |
author_sort |
Bouchet, Anne-Sophie |
title |
Experimental study of dense snow avalanches: velocity profiles in quasi-permanent and fully-developed flows |
title_short |
Experimental study of dense snow avalanches: velocity profiles in quasi-permanent and fully-developed flows |
title_full |
Experimental study of dense snow avalanches: velocity profiles in quasi-permanent and fully-developed flows |
title_fullStr |
Experimental study of dense snow avalanches: velocity profiles in quasi-permanent and fully-developed flows |
title_full_unstemmed |
Experimental study of dense snow avalanches: velocity profiles in quasi-permanent and fully-developed flows |
title_sort |
experimental study of dense snow avalanches: velocity profiles in quasi-permanent and fully-developed flows |
publisher |
HAL CCSD |
publishDate |
2004 |
url |
https://hal.inrae.fr/hal-02586331 |
long_lat |
ENVELOPE(68.917,68.917,-49.217,-49.217) |
geographic |
Lac Blanc |
geographic_facet |
Lac Blanc |
genre |
Annals of Glaciology |
genre_facet |
Annals of Glaciology |
op_source |
ISSN: 0260-3055 Annals of Glaciology https://hal.inrae.fr/hal-02586331 Annals of Glaciology, International Glaciological Society, 2004, 38, pp.30-34 |
op_relation |
hal-02586331 https://hal.inrae.fr/hal-02586331 IRSTEA: PUB00017067 |
_version_ |
1765998548833271808 |