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dc.contributor.authorSchulz, William H.en
dc.contributor.authorSmith, Joel B.en
dc.contributor.authorWang, Gonghuien
dc.contributor.authorJiang, Yaoen
dc.contributor.authorRoering, Joshua J.en
dc.contributor.alternative王, 功輝ja
dc.description.abstractLargely unknown mechanisms restrain motion of clay‐rich, slow‐moving landslides that are widespread worldwide and rarely accelerate catastrophically. We studied a clayey, slow‐moving landslide typical of thousands in Northern California, USA, to decipher hydrologic‐mechanical interactions that modulate landslide dynamics. Similar to some other studies, observed pore‐water pressures correlated poorly with landslide reactivation and speed. In situ and laboratory measurements strongly suggested that variable pressure along the landslide's lateral shear boundaries resulting from seasonal soil expansion and contraction modulated its reactivation and speed. Slope‐stability modeling suggested that the landslide's observed behavior could be predicted by including transient swell pressure as a resistance term, whereas modeling considering only transient hydrologic conditions predicted movement five to six months prior to when it was observed. All clayey soils swell to some degree; hence, our findings suggest that swell pressure likely modulates motion of many landslides and should be considered to improve forecasts of clayey landslide initiation and mobility.en
dc.publisherAmerican Geophysical Union (AGU)en
dc.rights©2018. The Authors. This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial‐NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.en
dc.subjectswell pressureen
dc.titleClayey Landslide Initiation and Acceleration Strongly Modulated by Soil Swellingen
dc.typejournal article-
dc.type.niitypeJournal Article-
dc.identifier.jtitleGeophysical Research Lettersen
dc.addressU.S. Geological Surveyen
dc.addressU.S. Geological Surveyen
dc.addressDisaster Prevention Research Institute, Kyoto Universityen
dc.addressDisaster Prevention Research Institute, Kyoto Universityen
dc.addressDepartment of Geological Sciences, University of Oregonen
dcterms.accessRightsopen access-
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