Application of portable free-fall penetrometer for geotechnical investigation of Arctic nearshore zone
The Arctic is currently undergoing rapid changes with regard to sea ice extent permafrost thaw, and coastal erosion. In addition to hydrodynamic processes, the sediments in the Arctic nearshore zone are affected by freeze–thaw cycles, as well as an increase of abundant suspended sediment introduced...
Published in: | Canadian Geotechnical Journal |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Canadian Science Publishing
2017
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1139/cgj-2016-0087 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cgj-2016-0087 http://www.nrcresearchpress.com/doi/pdf/10.1139/cgj-2016-0087 |
id |
crcansciencepubl:10.1139/cgj-2016-0087 |
---|---|
record_format |
openpolar |
spelling |
crcansciencepubl:10.1139/cgj-2016-0087 2024-06-23T07:49:45+00:00 Application of portable free-fall penetrometer for geotechnical investigation of Arctic nearshore zone Stark, Nina Radosavljevic, Boris Quinn, Brandon Lantuit, Hugues 2017 http://dx.doi.org/10.1139/cgj-2016-0087 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cgj-2016-0087 http://www.nrcresearchpress.com/doi/pdf/10.1139/cgj-2016-0087 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Geotechnical Journal volume 54, issue 1, page 31-46 ISSN 0008-3674 1208-6010 journal-article 2017 crcansciencepubl https://doi.org/10.1139/cgj-2016-0087 2024-06-06T04:11:18Z The Arctic is currently undergoing rapid changes with regard to sea ice extent permafrost thaw, and coastal erosion. In addition to hydrodynamic processes, the sediments in the Arctic nearshore zone are affected by freeze–thaw cycles, as well as an increase of abundant suspended sediment introduced by permafrost-induced mass movements, such as retrogressive thaw slumps, and increased river discharge. During the YUKON14 expedition to Herschel Island, Yukon, in situ geotechnical testing of nearshore zone sediments was conducted using a portable free-fall penetrometer. Approximately 200 sites were tested, and four different geotechnical signatures identified and grouped. Most locations were characterized by a soft sediment top layer that exhibited a noticeably lower sediment strength than the underlying sediment. In some cases, multiple layers of different sediment strength were detected in the upper meter of the seabed surface. The results were correlated to existing sediment grain size records and backscatter information from a phase measuring bathymetric sonar. Strong spatial variations in sediment type and stiffness were observed, as well as in abundance and thickness of a top layer of very soft and loose sediment. The geotechnical signatures were correlated to site-specific hydrodynamic conditions, morphology, and vicinity to thaw slumps. Article in Journal/Newspaper Arctic Herschel Herschel Island Ice permafrost Sea ice Yukon Canadian Science Publishing Arctic Herschel Island ENVELOPE(-139.089,-139.089,69.583,69.583) Yukon Canadian Geotechnical Journal 54 1 31 46 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
description |
The Arctic is currently undergoing rapid changes with regard to sea ice extent permafrost thaw, and coastal erosion. In addition to hydrodynamic processes, the sediments in the Arctic nearshore zone are affected by freeze–thaw cycles, as well as an increase of abundant suspended sediment introduced by permafrost-induced mass movements, such as retrogressive thaw slumps, and increased river discharge. During the YUKON14 expedition to Herschel Island, Yukon, in situ geotechnical testing of nearshore zone sediments was conducted using a portable free-fall penetrometer. Approximately 200 sites were tested, and four different geotechnical signatures identified and grouped. Most locations were characterized by a soft sediment top layer that exhibited a noticeably lower sediment strength than the underlying sediment. In some cases, multiple layers of different sediment strength were detected in the upper meter of the seabed surface. The results were correlated to existing sediment grain size records and backscatter information from a phase measuring bathymetric sonar. Strong spatial variations in sediment type and stiffness were observed, as well as in abundance and thickness of a top layer of very soft and loose sediment. The geotechnical signatures were correlated to site-specific hydrodynamic conditions, morphology, and vicinity to thaw slumps. |
format |
Article in Journal/Newspaper |
author |
Stark, Nina Radosavljevic, Boris Quinn, Brandon Lantuit, Hugues |
spellingShingle |
Stark, Nina Radosavljevic, Boris Quinn, Brandon Lantuit, Hugues Application of portable free-fall penetrometer for geotechnical investigation of Arctic nearshore zone |
author_facet |
Stark, Nina Radosavljevic, Boris Quinn, Brandon Lantuit, Hugues |
author_sort |
Stark, Nina |
title |
Application of portable free-fall penetrometer for geotechnical investigation of Arctic nearshore zone |
title_short |
Application of portable free-fall penetrometer for geotechnical investigation of Arctic nearshore zone |
title_full |
Application of portable free-fall penetrometer for geotechnical investigation of Arctic nearshore zone |
title_fullStr |
Application of portable free-fall penetrometer for geotechnical investigation of Arctic nearshore zone |
title_full_unstemmed |
Application of portable free-fall penetrometer for geotechnical investigation of Arctic nearshore zone |
title_sort |
application of portable free-fall penetrometer for geotechnical investigation of arctic nearshore zone |
publisher |
Canadian Science Publishing |
publishDate |
2017 |
url |
http://dx.doi.org/10.1139/cgj-2016-0087 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cgj-2016-0087 http://www.nrcresearchpress.com/doi/pdf/10.1139/cgj-2016-0087 |
long_lat |
ENVELOPE(-139.089,-139.089,69.583,69.583) |
geographic |
Arctic Herschel Island Yukon |
geographic_facet |
Arctic Herschel Island Yukon |
genre |
Arctic Herschel Herschel Island Ice permafrost Sea ice Yukon |
genre_facet |
Arctic Herschel Herschel Island Ice permafrost Sea ice Yukon |
op_source |
Canadian Geotechnical Journal volume 54, issue 1, page 31-46 ISSN 0008-3674 1208-6010 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cgj-2016-0087 |
container_title |
Canadian Geotechnical Journal |
container_volume |
54 |
container_issue |
1 |
container_start_page |
31 |
op_container_end_page |
46 |
_version_ |
1802640430278377472 |