Wind-tunnel study of snowdrift around avalanche defence structures
Avalanche defence structures such as retarding dams and breaking mounds are widely used to protect residential areas and other kinds of infrastructure. The effect of the defence structures depends largely on their effective height relative to the velocity, volume and flow depth of the avalanche. Sno...
Published in: | Annals of Glaciology |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press
2004
|
Subjects: | |
Online Access: | https://hdl.handle.net/11250/3098803 https://doi.org/10.3189/172756404781814799 |
id |
ftngi:oai:ngi.brage.unit.no:11250/3098803 |
---|---|
record_format |
openpolar |
spelling |
ftngi:oai:ngi.brage.unit.no:11250/3098803 2023-11-12T04:01:18+01:00 Wind-tunnel study of snowdrift around avalanche defence structures Jaedicke, Christian Naaim-Bouvet, Florence Granig, Matthias 2004 application/pdf https://hdl.handle.net/11250/3098803 https://doi.org/10.3189/172756404781814799 eng eng Cambridge University Press urn:issn:0260-3055 https://hdl.handle.net/11250/3098803 https://doi.org/10.3189/172756404781814799 The Author(s) 325-330 38 Annals of Glaciology Avalanche-RnD Snøskred-FoU Journal article 2004 ftngi https://doi.org/10.3189/172756404781814799 2023-11-01T23:48:58Z Avalanche defence structures such as retarding dams and breaking mounds are widely used to protect residential areas and other kinds of infrastructure. The effect of the defence structures depends largely on their effective height relative to the velocity, volume and flow depth of the avalanche. Snow depositions from earlier avalanches as well as from drifting snow can significantly alter the effective height of defence structures. Different designs of avalanche-breaking mounds and retarding dams were tested in the Cemagref (Grenoble, France) wind tunnel for their effect on drifting snow. Examples included dams and mounds of different sizes and heights. The models were tested in a wind tunnel with sand particles subjected to different wind directions. The resulting depositions were scanned with a laser system to obtain a three-dimensional picture of the accumulation pattern. The results show that the accumulated snow varies widely with the design of the structure for a given wind direction. Most snow is accumulated around narrow mounds, with least accumulation observed around mounds covering a smaller relative area of the avalanche path. The data obtained can be used to study the effect of the depositions on the retarding effect of the avalanche defence structures. However, because the similarity criteria for studying the interaction between structures and saltating particles in a wind tunnel cannot be met, the transfer of the results to reality must be performed with caution. Article in Journal/Newspaper Annals of Glaciology Norwegian Geotechnical Institute (NGI) Digital Archive Annals of Glaciology 38 325 330 |
institution |
Open Polar |
collection |
Norwegian Geotechnical Institute (NGI) Digital Archive |
op_collection_id |
ftngi |
language |
English |
topic |
Avalanche-RnD Snøskred-FoU |
spellingShingle |
Avalanche-RnD Snøskred-FoU Jaedicke, Christian Naaim-Bouvet, Florence Granig, Matthias Wind-tunnel study of snowdrift around avalanche defence structures |
topic_facet |
Avalanche-RnD Snøskred-FoU |
description |
Avalanche defence structures such as retarding dams and breaking mounds are widely used to protect residential areas and other kinds of infrastructure. The effect of the defence structures depends largely on their effective height relative to the velocity, volume and flow depth of the avalanche. Snow depositions from earlier avalanches as well as from drifting snow can significantly alter the effective height of defence structures. Different designs of avalanche-breaking mounds and retarding dams were tested in the Cemagref (Grenoble, France) wind tunnel for their effect on drifting snow. Examples included dams and mounds of different sizes and heights. The models were tested in a wind tunnel with sand particles subjected to different wind directions. The resulting depositions were scanned with a laser system to obtain a three-dimensional picture of the accumulation pattern. The results show that the accumulated snow varies widely with the design of the structure for a given wind direction. Most snow is accumulated around narrow mounds, with least accumulation observed around mounds covering a smaller relative area of the avalanche path. The data obtained can be used to study the effect of the depositions on the retarding effect of the avalanche defence structures. However, because the similarity criteria for studying the interaction between structures and saltating particles in a wind tunnel cannot be met, the transfer of the results to reality must be performed with caution. |
format |
Article in Journal/Newspaper |
author |
Jaedicke, Christian Naaim-Bouvet, Florence Granig, Matthias |
author_facet |
Jaedicke, Christian Naaim-Bouvet, Florence Granig, Matthias |
author_sort |
Jaedicke, Christian |
title |
Wind-tunnel study of snowdrift around avalanche defence structures |
title_short |
Wind-tunnel study of snowdrift around avalanche defence structures |
title_full |
Wind-tunnel study of snowdrift around avalanche defence structures |
title_fullStr |
Wind-tunnel study of snowdrift around avalanche defence structures |
title_full_unstemmed |
Wind-tunnel study of snowdrift around avalanche defence structures |
title_sort |
wind-tunnel study of snowdrift around avalanche defence structures |
publisher |
Cambridge University Press |
publishDate |
2004 |
url |
https://hdl.handle.net/11250/3098803 https://doi.org/10.3189/172756404781814799 |
genre |
Annals of Glaciology |
genre_facet |
Annals of Glaciology |
op_source |
325-330 38 Annals of Glaciology |
op_relation |
urn:issn:0260-3055 https://hdl.handle.net/11250/3098803 https://doi.org/10.3189/172756404781814799 |
op_rights |
The Author(s) |
op_doi |
https://doi.org/10.3189/172756404781814799 |
container_title |
Annals of Glaciology |
container_volume |
38 |
container_start_page |
325 |
op_container_end_page |
330 |
_version_ |
1782332275209273344 |