A methodology for examining soil-water characteristics of loess and loess-derived soils on Banks Peninsula, New Zealand

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dc.contributor.authorFenton CH
dc.contributor.authorYates K
dc.date.accessioned2018-07-24T00:15:17Z
dc.date.available2018-07-24T00:15:17Z
dc.date.issued2017en
dc.date.updated2018-05-18T03:54:02Z
dc.description.abstractLoess and loess-derived soils cover much of Canterbury, from the foothills of the Southern Alps to the Pacific Coast. These soils are of variable thickness, ranging from several metres up to 40m at the base of slopes on Banks Peninsula. In many areas primary, air-fall loess has been reworked by slope processes to form a loess colluvium. These soils are comprised predominantly of silt but can contain up to 45 % clay, giving rise to low plasticity clay behaviour. Loess and loess-derived soils are relatively dense, and can form vertical exposures. Dry densities are typically between 1.6 t/m3 and 1.8 t/m3, hence these soils do not display collapse behaviour common to other loess deposits around the World. Across Canterbury these soils display high dry strength but weaken rapidly with small increases in moisture content. Periodic wetting leads to a variety of slope failures related to internal erosion (tunnel gullying) and rapid loss of shear strength (debris flows and soil slides). In this paper, we present a methodology to investigate the effects of soil microstructure and soil suction on the shear strength and stability of loess soils in Akaroa Harbour.en
dc.identifier.urihttp://hdl.handle.net/10092/15694
dc.language.isoen
dc.subjectloessen
dc.subjectslope stabilityen
dc.subjectsoil suctionen
dc.subjectmicrostructureen
dc.subject.anzsrcFields of Research::37 - Earth sciences::3705 - Geology::370509 - Sedimentologyen
dc.subject.anzsrcField of Research::04 - Earth Sciences::0403 - Geology::040312 - Structural Geologyen
dc.subject.anzsrcField of Research::05 - Environmental Sciences::0503 - Soil Sciences::050305 - Soil Physicsen
dc.titleA methodology for examining soil-water characteristics of loess and loess-derived soils on Banks Peninsula, New Zealanden
dc.typeConference Contributions - Publisheden
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