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Article: Erosional effects on runout of fast landslides, debris flows and avalanches: A numerical investigation

TitleErosional effects on runout of fast landslides, debris flows and avalanches: A numerical investigation
Authors
KeywordsErosion
Landslides
Numerical modelling and analysis
Slopes
Issue Date2006
PublisherThomas Telford (ICE Publishing). The Journal's web site is located at http://www.geotechnique-ice.com
Citation
Geotechnique, 2006, v. 56 n. 5, p. 305-322 How to Cite?
AbstractThe mechanism of mass changes in debris transportation process is an important topic in the study of fast landslides, debris flows and avalanches. Basal erosion is recognised as a dynamic interaction between the original moving material and the entrained basal topsoil shearing along their non-slip contact surface. In this paper we propose a new concept of yield rate and establish the erosional relationship to bridge these two systems. A pertinent mathematical model and numerical implementation are formulated. Parametric numerical experiments are conducted to compare the erosional effects. The simulated results are consistent with available experimental and field observations. The influence of the involvement of the erosive material on runout behaviour and the global mobility of the moving material are elucidated. The proposed method is then employed to analyse a recent debris flow event in northern Italy. The excellent match to the field data gives it a plausible potential application to the analysis of this type of gravity-driven flow with significant erosion. Defined in a dimensionless form, the proposed yield rate can be estimated conveniently in general geotechnical practices.
Persistent Identifierhttp://hdl.handle.net/10722/71842
ISSN
2015 Impact Factor: 2.0
2015 SCImago Journal Rankings: 2.837
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorChen, Hen_HK
dc.contributor.authorCrosta, GBen_HK
dc.contributor.authorLee, CFen_HK
dc.date.accessioned2010-09-06T06:35:39Z-
dc.date.available2010-09-06T06:35:39Z-
dc.date.issued2006en_HK
dc.identifier.citationGeotechnique, 2006, v. 56 n. 5, p. 305-322en_HK
dc.identifier.issn0016-8505en_HK
dc.identifier.urihttp://hdl.handle.net/10722/71842-
dc.description.abstractThe mechanism of mass changes in debris transportation process is an important topic in the study of fast landslides, debris flows and avalanches. Basal erosion is recognised as a dynamic interaction between the original moving material and the entrained basal topsoil shearing along their non-slip contact surface. In this paper we propose a new concept of yield rate and establish the erosional relationship to bridge these two systems. A pertinent mathematical model and numerical implementation are formulated. Parametric numerical experiments are conducted to compare the erosional effects. The simulated results are consistent with available experimental and field observations. The influence of the involvement of the erosive material on runout behaviour and the global mobility of the moving material are elucidated. The proposed method is then employed to analyse a recent debris flow event in northern Italy. The excellent match to the field data gives it a plausible potential application to the analysis of this type of gravity-driven flow with significant erosion. Defined in a dimensionless form, the proposed yield rate can be estimated conveniently in general geotechnical practices.en_HK
dc.languageengen_HK
dc.publisherThomas Telford (ICE Publishing). The Journal's web site is located at http://www.geotechnique-ice.comen_HK
dc.relation.ispartofGeotechniqueen_HK
dc.rightsGeotechnique. Copyright © Thomas Telford Ltd.en_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.rightsPermission is granted by ICE Publishing to print one copy for personal use. Any other use of these PDF files is subject to reprint fees-
dc.subjectErosionen_HK
dc.subjectLandslidesen_HK
dc.subjectNumerical modelling and analysisen_HK
dc.subjectSlopesen_HK
dc.titleErosional effects on runout of fast landslides, debris flows and avalanches: A numerical investigationen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0016-8505&volume=56&issue=5&spage=305&epage=322&date=2006&atitle=Erosional+effects+on+runout+of+fast+landslides,+debris+flows+and+avalanches:+a+numerical+investigationen_HK
dc.identifier.emailLee, CF: leecf@hkucc.hku.hken_HK
dc.identifier.authorityLee, CF=rp00139en_HK
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1680/geot.2006.56.5.305en_HK
dc.identifier.scopuseid_2-s2.0-33746014451en_HK
dc.identifier.hkuros118280en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33746014451&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume56en_HK
dc.identifier.issue5en_HK
dc.identifier.spage305en_HK
dc.identifier.epage322en_HK
dc.identifier.isiWOS:000238991000002-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridChen, H=7501625581en_HK
dc.identifier.scopusauthoridCrosta, GB=7005690420en_HK
dc.identifier.scopusauthoridLee, CF=8068602600en_HK

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