Field and laboratory analysis of the runout characteristics of hillslope debris flows in Switzerland

Hillslope debris flows are unconfined flows that originate by shallow failures in unconsolidated material at steep slopes. In spite of their significant hazard for persons and infrastructure in mountainous regions, research on hillslope debris flows is rather scarce in comparison to other landslide...

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Autores: Hurlimann Ziegler, Marcel|||0000-0003-0119-1438, McArdell, Brian, W., Rickli, Christian
Tipo de recurso: artículo
Fecha de publicación:2015
País:España
Institución:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:upcommons.upc.edu:2117/77265
Acceso en línea:https://hdl.handle.net/2117/77265
https://dx.doi.org/10.1016/j.geomorph.2014.11.030
Access Level:acceso abierto
Palabra clave:Debris avalanches
Switzerland--Geology
Hillslope debris flow
Runout distance
Landslide inventory
Laboratory experiment
Switzerland
Esllavissades
Suïssa
Àrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de roques
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spelling Field and laboratory analysis of the runout characteristics of hillslope debris flows in SwitzerlandHurlimann Ziegler, Marcel|||0000-0003-0119-1438McArdell, Brian, W.Rickli, ChristianDebris avalanchesSwitzerland--GeologyHillslope debris flowRunout distanceLandslide inventoryLaboratory experimentSwitzerlandEsllavissadesSuïssaÀrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de roquesHillslope debris flows are unconfined flows that originate by shallow failures in unconsolidated material at steep slopes. In spite of their significant hazard for persons and infrastructure in mountainous regions, research on hillslope debris flows is rather scarce in comparison to other landslide types. This study focusses on the runout characteristics of hillslope debris flows applying two different approaches. First, detailed landslide inventories, which include field measurements of 548 slope failures that occurred during the last two decades in seven parts of Switzerland, were analysed. Second, laboratory tests were carried out to study the effect of the soil water content, grain-size distribution and mobilized volume on the runout behaviour of hillslope debris flows. Most of the failures in the field started as shallow translational slides at terrain slopes between 25° and 45° and involved volumes of some tens to a few hundred cubic meters. An analysis of the runout distance of 117 hillslope debris flows showed that they normally travelled some tens of meters, but sometimes the runout exceeded 300 m. A positive relation between volume and runout distance and between volume and affected area was observed, although there is considerable scatter in the data. The affected area of 63 hillslope debris flows ranged from ~ 100 to ~ 1500 m2. Based on the field data, a 7.5 m long laboratory hillslope was designed with a geometrical scale factor of 20. A total of 75 runs with volumes from 4 to 20 dm3, water contents from 18% to 38%, and four grain-size distributions were carried out. The laboratory tests revealed that water content is the dominant control, but also the clay content strongly influences the runout distance and the affected area. Even a small increase in water or clay content produces a considerably larger or smaller runout distance, respectively. In contrast, the influence of the volume on the runout was smaller, and a positive relation was observed between these two parameters. The field and laboratory results are in general agreement and consistent with the results of other studies. The results of this work improve the understanding of hillslope debris flows and may aid in the hazard assessments of these processes.Peer Reviewed20152015-03-0120152015-10-01journal articlehttp://purl.org/coar/resource_type/c_6501AMhttp://purl.org/coar/version/c_ab4af688f83e57aainfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/77265https://dx.doi.org/10.1016/j.geomorph.2014.11.030reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2http://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/772652026-05-27T15:37:01Z
dc.title.none.fl_str_mv Field and laboratory analysis of the runout characteristics of hillslope debris flows in Switzerland
title Field and laboratory analysis of the runout characteristics of hillslope debris flows in Switzerland
spellingShingle Field and laboratory analysis of the runout characteristics of hillslope debris flows in Switzerland
Hurlimann Ziegler, Marcel|||0000-0003-0119-1438
Debris avalanches
Switzerland--Geology
Hillslope debris flow
Runout distance
Landslide inventory
Laboratory experiment
Switzerland
Esllavissades
Suïssa
Àrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de roques
title_short Field and laboratory analysis of the runout characteristics of hillslope debris flows in Switzerland
title_full Field and laboratory analysis of the runout characteristics of hillslope debris flows in Switzerland
title_fullStr Field and laboratory analysis of the runout characteristics of hillslope debris flows in Switzerland
title_full_unstemmed Field and laboratory analysis of the runout characteristics of hillslope debris flows in Switzerland
title_sort Field and laboratory analysis of the runout characteristics of hillslope debris flows in Switzerland
dc.creator.none.fl_str_mv Hurlimann Ziegler, Marcel|||0000-0003-0119-1438
McArdell, Brian, W.
Rickli, Christian
author Hurlimann Ziegler, Marcel|||0000-0003-0119-1438
author_facet Hurlimann Ziegler, Marcel|||0000-0003-0119-1438
McArdell, Brian, W.
Rickli, Christian
author_role author
author2 McArdell, Brian, W.
Rickli, Christian
author2_role author
author
dc.subject.none.fl_str_mv Debris avalanches
Switzerland--Geology
Hillslope debris flow
Runout distance
Landslide inventory
Laboratory experiment
Switzerland
Esllavissades
Suïssa
Àrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de roques
topic Debris avalanches
Switzerland--Geology
Hillslope debris flow
Runout distance
Landslide inventory
Laboratory experiment
Switzerland
Esllavissades
Suïssa
Àrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de roques
description Hillslope debris flows are unconfined flows that originate by shallow failures in unconsolidated material at steep slopes. In spite of their significant hazard for persons and infrastructure in mountainous regions, research on hillslope debris flows is rather scarce in comparison to other landslide types. This study focusses on the runout characteristics of hillslope debris flows applying two different approaches. First, detailed landslide inventories, which include field measurements of 548 slope failures that occurred during the last two decades in seven parts of Switzerland, were analysed. Second, laboratory tests were carried out to study the effect of the soil water content, grain-size distribution and mobilized volume on the runout behaviour of hillslope debris flows. Most of the failures in the field started as shallow translational slides at terrain slopes between 25° and 45° and involved volumes of some tens to a few hundred cubic meters. An analysis of the runout distance of 117 hillslope debris flows showed that they normally travelled some tens of meters, but sometimes the runout exceeded 300 m. A positive relation between volume and runout distance and between volume and affected area was observed, although there is considerable scatter in the data. The affected area of 63 hillslope debris flows ranged from ~ 100 to ~ 1500 m2. Based on the field data, a 7.5 m long laboratory hillslope was designed with a geometrical scale factor of 20. A total of 75 runs with volumes from 4 to 20 dm3, water contents from 18% to 38%, and four grain-size distributions were carried out. The laboratory tests revealed that water content is the dominant control, but also the clay content strongly influences the runout distance and the affected area. Even a small increase in water or clay content produces a considerably larger or smaller runout distance, respectively. In contrast, the influence of the volume on the runout was smaller, and a positive relation was observed between these two parameters. The field and laboratory results are in general agreement and consistent with the results of other studies. The results of this work improve the understanding of hillslope debris flows and may aid in the hazard assessments of these processes.
publishDate 2015
dc.date.none.fl_str_mv 2015
2015-03-01
2015
2015-10-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
AM
http://purl.org/coar/version/c_ab4af688f83e57aa
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/77265
https://dx.doi.org/10.1016/j.geomorph.2014.11.030
url https://hdl.handle.net/2117/77265
https://dx.doi.org/10.1016/j.geomorph.2014.11.030
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2

http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2

http://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:UPCommons. Portal del coneixement obert de la UPC
instname:Universitat Politècnica de Catalunya (UPC)
instname_str Universitat Politècnica de Catalunya (UPC)
reponame_str UPCommons. Portal del coneixement obert de la UPC
collection UPCommons. Portal del coneixement obert de la UPC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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