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Article: Landslides in the transitional slopes between a loess platform and river terrace, northwest China

TitleLandslides in the transitional slopes between a loess platform and river terrace, northwest China
Authors
KeywordsAgricultural Irrigation
Groundwater Table Rise
Landslide
Loess Platform
Issue Date2011
Citation
Environmental And Engineering Geoscience, 2011, v. 17 n. 3, p. 267-279 How to Cite?
Abstract
Irrigation-induced loess landslides are common in the transitional slopes between loess platforms and river terraces in northwest China. A typical area of the south Jingyang platform, Shaanxi Province, was selected to investigate such phenomena. Approximately 50 landslides involving loess flowslides and loess slides have occurred since the irrigation of this platform began in 1976. Flowslides can travel a long runout distance at high speed and show a small apparent friction angle. Due to long-term irrigation, the groundwater table in the study area has been substantially raised. To clarify the failure mechanism of loess under these conditions, anisotropically consolidated undrained triaxial tests (ACU) and constant shear drained tests (CSD) were conducted on undisturbed specimens retrieved from the study area. The test results revealed that loess exhibited a sudden collapse behavior with the increase of porewater pressure in a drained condition. The resultant loss of strength in an undrained condition was related to the development of pore-water pressure that reduced the effective stress. For a flowslide, we conclude that the groundwater rises first and causes the collapse of loess in the bottom portion of the slope, which then leads to undrained mobilization. Following the initiation, excess pore-water pressure is generated near the contact between sliding material and river terrace, leading to mobility of the flowslide.
Persistent Identifierhttp://hdl.handle.net/10722/150651
ISSN
2013 Impact Factor: 0.596
2013 SCImago Journal Rankings: 0.440
References

 

Author Affiliations
  1. The University of Hong Kong
  2. Institute of Geology and Geophysics Chinese Academy of Sciences
  3. Reconnaissance and Design Institute of Guangxi Power Industry
DC FieldValueLanguage
dc.contributor.authorXu, Len_US
dc.contributor.authorDai, Fen_US
dc.contributor.authorTham, LGen_US
dc.contributor.authorTu, Xen_US
dc.contributor.authorJin, Yen_US
dc.date.accessioned2012-06-26T06:06:28Z-
dc.date.available2012-06-26T06:06:28Z-
dc.date.issued2011en_US
dc.identifier.citationEnvironmental And Engineering Geoscience, 2011, v. 17 n. 3, p. 267-279en_US
dc.identifier.issn1078-7275en_US
dc.identifier.urihttp://hdl.handle.net/10722/150651-
dc.description.abstractIrrigation-induced loess landslides are common in the transitional slopes between loess platforms and river terraces in northwest China. A typical area of the south Jingyang platform, Shaanxi Province, was selected to investigate such phenomena. Approximately 50 landslides involving loess flowslides and loess slides have occurred since the irrigation of this platform began in 1976. Flowslides can travel a long runout distance at high speed and show a small apparent friction angle. Due to long-term irrigation, the groundwater table in the study area has been substantially raised. To clarify the failure mechanism of loess under these conditions, anisotropically consolidated undrained triaxial tests (ACU) and constant shear drained tests (CSD) were conducted on undisturbed specimens retrieved from the study area. The test results revealed that loess exhibited a sudden collapse behavior with the increase of porewater pressure in a drained condition. The resultant loss of strength in an undrained condition was related to the development of pore-water pressure that reduced the effective stress. For a flowslide, we conclude that the groundwater rises first and causes the collapse of loess in the bottom portion of the slope, which then leads to undrained mobilization. Following the initiation, excess pore-water pressure is generated near the contact between sliding material and river terrace, leading to mobility of the flowslide.en_US
dc.languageengen_US
dc.relation.ispartofEnvironmental and Engineering Geoscienceen_US
dc.subjectAgricultural Irrigationen_US
dc.subjectGroundwater Table Riseen_US
dc.subjectLandslideen_US
dc.subjectLoess Platformen_US
dc.titleLandslides in the transitional slopes between a loess platform and river terrace, northwest Chinaen_US
dc.typeArticleen_US
dc.identifier.emailTham, LG:hrectlg@hkucc.hku.hken_US
dc.identifier.authorityTham, LG=rp00176en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.2113/gseegeosci.17.3.267en_US
dc.identifier.scopuseid_2-s2.0-84863066603en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-84856477267&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume17en_US
dc.identifier.issue3en_US
dc.identifier.spage267en_US
dc.identifier.epage279en_US
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridXu, L=54940461400en_US
dc.identifier.scopusauthoridDai, F=7102055666en_US
dc.identifier.scopusauthoridTham, LG=7006213628en_US
dc.identifier.scopusauthoridTu, X=54944399400en_US
dc.identifier.scopusauthoridJin, Y=36869876500en_US

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