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Article: Topographic features and initiation of earth flows on Heifangtai loess plateau

TitleTopographic features and initiation of earth flows on Heifangtai loess plateau
Authors
KeywordsAgricultural Irrigation
Groundwater Flow Modeling
Heifangtai
Laboratory Tests
Loess Earth Flow/Landslide
Issue Date2011
Publisher中國科學院武漢巖土力學研究所. The Journal's web site is located at http://ytlx.chinajournal.net.cn/
Citation
Yantu Lixue/Rock And Soil Mechanics, 2011, v. 32 n. 6, p. 1767-1773 How to Cite?
AbstractAgricultural irrigation on Heifangtai loess plateau has triggered dozens of loess earth flows. In this paper, IKONOS image was first used to interpret the topographic features of those earth flows, complimented with a detailed field-walk survey. The results indicated that loess earth flows had a travel distance of over 300 m, constituting the most destructive threat. The failed material was deposited in a flow-like lobe form. The elevation of the underlying impermeable clay was measured from the outcrops and boreholes, indicating that the eastern part of the plateau was lower than the west. It was observed from groundwater flow modeling that groundwater flow was controlled by the topography of underlying impermeable clay, and converged and partially discharged in the east margin of Heifangtai. This is in coincident with the phenomena that most loess earth flows occurred in the east margin. Laboratory stress path tests were then performed on undisturbed specimens to explain the failure mechanism of loess. The test results show that the initiation of loess earth flow is probably triggered by static liquefaction resulting from rise of groundwater table.
Persistent Identifierhttp://hdl.handle.net/10722/150575
ISSN
2014 SCImago Journal Rankings: 0.789
References

 

DC FieldValueLanguage
dc.contributor.authorWu, CXen_US
dc.contributor.authorXu, Len_US
dc.contributor.authorDai, FCen_US
dc.contributor.authorMin, Hen_US
dc.contributor.authorTham, LGen_US
dc.contributor.authorKwong, AKLen_US
dc.contributor.authorZhou, YFen_US
dc.date.accessioned2012-06-26T06:05:52Z-
dc.date.available2012-06-26T06:05:52Z-
dc.date.issued2011en_US
dc.identifier.citationYantu Lixue/Rock And Soil Mechanics, 2011, v. 32 n. 6, p. 1767-1773en_US
dc.identifier.issn1000-7598en_US
dc.identifier.urihttp://hdl.handle.net/10722/150575-
dc.description.abstractAgricultural irrigation on Heifangtai loess plateau has triggered dozens of loess earth flows. In this paper, IKONOS image was first used to interpret the topographic features of those earth flows, complimented with a detailed field-walk survey. The results indicated that loess earth flows had a travel distance of over 300 m, constituting the most destructive threat. The failed material was deposited in a flow-like lobe form. The elevation of the underlying impermeable clay was measured from the outcrops and boreholes, indicating that the eastern part of the plateau was lower than the west. It was observed from groundwater flow modeling that groundwater flow was controlled by the topography of underlying impermeable clay, and converged and partially discharged in the east margin of Heifangtai. This is in coincident with the phenomena that most loess earth flows occurred in the east margin. Laboratory stress path tests were then performed on undisturbed specimens to explain the failure mechanism of loess. The test results show that the initiation of loess earth flow is probably triggered by static liquefaction resulting from rise of groundwater table.en_US
dc.languageengen_US
dc.publisher中國科學院武漢巖土力學研究所. The Journal's web site is located at http://ytlx.chinajournal.net.cn/zh_HK
dc.relation.ispartofYantu Lixue/Rock and Soil Mechanicsen_US
dc.subjectAgricultural Irrigationen_US
dc.subjectGroundwater Flow Modelingen_US
dc.subjectHeifangtaien_US
dc.subjectLaboratory Testsen_US
dc.subjectLoess Earth Flow/Landslideen_US
dc.titleTopographic features and initiation of earth flows on Heifangtai loess plateauen_US
dc.typeArticleen_US
dc.identifier.emailTham, LG:hrectlg@hkucc.hku.hken_US
dc.identifier.emailKwong, AKL:kwongakl@hkucc.hku.hken_US
dc.identifier.authorityTham, LG=rp00176en_US
dc.identifier.authorityKwong, AKL=rp00129en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-79959885736en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79959885736&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume32en_US
dc.identifier.issue6en_US
dc.identifier.spage1767en_US
dc.identifier.epage1773en_US
dc.publisher.placeChinaen_US
dc.identifier.scopusauthoridWu, CX=42162301100en_US
dc.identifier.scopusauthoridXu, L=35724949900en_US
dc.identifier.scopusauthoridDai, FC=7102055666en_US
dc.identifier.scopusauthoridMin, H=34973198300en_US
dc.identifier.scopusauthoridTham, LG=7006213628en_US
dc.identifier.scopusauthoridKwong, AKL=24385436300en_US
dc.identifier.scopusauthoridZhou, YF=43561944800en_US

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