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dc.contributor.authorKluger, Max Okeen_NZ
dc.contributor.authorJorat, M. Ehsanen_NZ
dc.contributor.authorMoon, Vicki G.en_NZ
dc.contributor.authorKreiter, Stefanen_NZ
dc.contributor.authorde Lange, Willem P.en_NZ
dc.contributor.authorMörz, Tobiasen_NZ
dc.contributor.authorRobertson, Thomasen_NZ
dc.contributor.authorLowe, David J.en_NZ
dc.date.accessioned2019-10-21T22:41:55Z
dc.date.available2019-10-19en_NZ
dc.date.available2019-10-21T22:41:55Z
dc.date.issued2019en_NZ
dc.identifier.citationKluger, M. O., Jorat, M. E., Moon, V. G., Kreiter, S., de Lange, W. P., Mörz, T., … Lowe, D. J. (2019). Rainfall threshold for initiating effective stress decrease and failure in weathered tephra slopes. Landslides. https://doi.org/10.1007/s10346-019-01289-2en
dc.identifier.issn1612-510Xen_NZ
dc.identifier.urihttps://hdl.handle.net/10289/12994
dc.description.abstractRainfall is one of the most important triggers of slope failure. Weathered pyroclastic (tephra) deposits are especially vulnerable to slope failure because they commonly form slopes of high porosity and high clay content. Empirically derived thresholds for the triggering of landslides are commonly based on rainfall conditions and have been widely applied in volcanic soils. However, so far only few researchers utilized pore water pressure in the slope as additional variable for the threshold calibration. Here, we derived a new rainfall threshold for initiating the decrease in effective stress in the slope by analyzing a long-term record of rainfall and piezometer data from a slide-prone coastal area in northern New Zealand that consists of clayey, halloysitic tephra deposits. The level of effective stress decrease increased with rainfall intensity and duration. We observed highest effective stress decrease of up to 36% during rainfall events that triggered landslides in our study area. The effective stress threshold exhibits a satisfactory predictive capability. The probability of correctly predicting a decrease in effective stress is 53%. The effective stress threshold contributes towards the implementation of the decrease in effective stress into rainfall thresholds for the occurrence of landslides.en_NZ
dc.format.mimetypeapplication/pdf
dc.language.isoenen_NZ
dc.publisherSpringer (part of Springer Nature)en_NZ
dc.rights© Springer-Verlag GmbH Germany, part of Springer Nature 2019. This is the author's accepted version. The final publication is available at Springer via dx.doi.org/10.1007/s10346-019-01289-2
dc.subjectlandslidesen_NZ
dc.subjecteffective stressen_NZ
dc.subjectrainfall thresholden_NZ
dc.subjectweathered tephraen_NZ
dc.subjectspheroidal halloysiteen_NZ
dc.subjectrainfall-induced slope failureen_NZ
dc.titleRainfall threshold for initiating effective stress decrease and failure in weathered tephra slopesen_NZ
dc.typeJournal Article
dc.identifier.doi10.1007/s10346-019-01289-2en_NZ
dc.relation.isPartOfLandslidesen_NZ
pubs.elements-id241248


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