A laboratory study of the retarding effects of braking mounds on snow avalanches
A series of laboratory experiments in a 6 m long chute using glass particles of mean diameter 100 μm were performed to investigate the interaction of a supercritical, granular flow with obstacles. It was found that the collision of the flow with a row of mounds led to the formation of a jet, whereby...
Main Authors: | , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2003
|
Subjects: | |
Online Access: | https://hdl.handle.net/1983/85d54cc2-c907-4577-b3bd-0435c9cc9c6b https://research-information.bris.ac.uk/en/publications/85d54cc2-c907-4577-b3bd-0435c9cc9c6b http://www.scopus.com/inward/record.url?scp=0348017044&partnerID=8YFLogxK |
id |
ftubristolcris:oai:research-information.bris.ac.uk:publications/85d54cc2-c907-4577-b3bd-0435c9cc9c6b |
---|---|
record_format |
openpolar |
spelling |
ftubristolcris:oai:research-information.bris.ac.uk:publications/85d54cc2-c907-4577-b3bd-0435c9cc9c6b 2024-04-28T08:26:51+00:00 A laboratory study of the retarding effects of braking mounds on snow avalanches Hákonardóttir, Kristín Martha Hogg, Andrew J. Jóhannesson, Tómas Tómasson, Gunnar G. 2003-01-01 https://hdl.handle.net/1983/85d54cc2-c907-4577-b3bd-0435c9cc9c6b https://research-information.bris.ac.uk/en/publications/85d54cc2-c907-4577-b3bd-0435c9cc9c6b http://www.scopus.com/inward/record.url?scp=0348017044&partnerID=8YFLogxK eng eng https://research-information.bris.ac.uk/en/publications/85d54cc2-c907-4577-b3bd-0435c9cc9c6b info:eu-repo/semantics/restrictedAccess Hákonardóttir , K M , Hogg , A J , Jóhannesson , T & Tómasson , G G 2003 , ' A laboratory study of the retarding effects of braking mounds on snow avalanches ' , Journal of Glaciology , vol. 49 , no. 165 , pp. 191-200 . article 2003 ftubristolcris 2024-04-03T15:00:36Z A series of laboratory experiments in a 6 m long chute using glass particles of mean diameter 100 μm were performed to investigate the interaction of a supercritical, granular flow with obstacles. It was found that the collision of the flow with a row of mounds led to the formation of a jet, whereby a large fraction of the flow was launched from the top of the mounds and subsequently landed back on the chute. The retarding effect of the mounds was investigated quantitatively by direct measurements of the velocity of the flow, its runout length and the geometry of the jet. The effects of several aspects of the layout of the mounds on their retarding effects were examined. It was observed that a row of steep mounds with an elongated shape in the transverse direction to the flow and with a height several times the flow depth led to dissipation of a large proportion of the kinetic energy of the flow. Article in Journal/Newspaper Journal of Glaciology University of Bristol: Bristol Research |
institution |
Open Polar |
collection |
University of Bristol: Bristol Research |
op_collection_id |
ftubristolcris |
language |
English |
description |
A series of laboratory experiments in a 6 m long chute using glass particles of mean diameter 100 μm were performed to investigate the interaction of a supercritical, granular flow with obstacles. It was found that the collision of the flow with a row of mounds led to the formation of a jet, whereby a large fraction of the flow was launched from the top of the mounds and subsequently landed back on the chute. The retarding effect of the mounds was investigated quantitatively by direct measurements of the velocity of the flow, its runout length and the geometry of the jet. The effects of several aspects of the layout of the mounds on their retarding effects were examined. It was observed that a row of steep mounds with an elongated shape in the transverse direction to the flow and with a height several times the flow depth led to dissipation of a large proportion of the kinetic energy of the flow. |
format |
Article in Journal/Newspaper |
author |
Hákonardóttir, Kristín Martha Hogg, Andrew J. Jóhannesson, Tómas Tómasson, Gunnar G. |
spellingShingle |
Hákonardóttir, Kristín Martha Hogg, Andrew J. Jóhannesson, Tómas Tómasson, Gunnar G. A laboratory study of the retarding effects of braking mounds on snow avalanches |
author_facet |
Hákonardóttir, Kristín Martha Hogg, Andrew J. Jóhannesson, Tómas Tómasson, Gunnar G. |
author_sort |
Hákonardóttir, Kristín Martha |
title |
A laboratory study of the retarding effects of braking mounds on snow avalanches |
title_short |
A laboratory study of the retarding effects of braking mounds on snow avalanches |
title_full |
A laboratory study of the retarding effects of braking mounds on snow avalanches |
title_fullStr |
A laboratory study of the retarding effects of braking mounds on snow avalanches |
title_full_unstemmed |
A laboratory study of the retarding effects of braking mounds on snow avalanches |
title_sort |
laboratory study of the retarding effects of braking mounds on snow avalanches |
publishDate |
2003 |
url |
https://hdl.handle.net/1983/85d54cc2-c907-4577-b3bd-0435c9cc9c6b https://research-information.bris.ac.uk/en/publications/85d54cc2-c907-4577-b3bd-0435c9cc9c6b http://www.scopus.com/inward/record.url?scp=0348017044&partnerID=8YFLogxK |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Hákonardóttir , K M , Hogg , A J , Jóhannesson , T & Tómasson , G G 2003 , ' A laboratory study of the retarding effects of braking mounds on snow avalanches ' , Journal of Glaciology , vol. 49 , no. 165 , pp. 191-200 . |
op_relation |
https://research-information.bris.ac.uk/en/publications/85d54cc2-c907-4577-b3bd-0435c9cc9c6b |
op_rights |
info:eu-repo/semantics/restrictedAccess |
_version_ |
1797586070333816832 |