Spatial and temporal variability of pore-water pressures in residual soil slopes in a tropical climate

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Spatial and temporal variability of pore-water pressures in residual soil slopes in a tropical climate

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dc.contributor.author Rahardjo, Harianto
dc.contributor.author Rezaur, R. B.
dc.contributor.author Leong, Eng Choon
dc.date.accessioned 2011-11-16T00:56:04Z
dc.date.available 2011-11-16T00:56:04Z
dc.date.copyright 2002
dc.date.issued 2011-11-16
dc.identifier.citation Rahardjo, H., Rezaur. R. B. & Leong, E. C. (2002). Spatial and Temporal Variability of Pore-Water Pressures in Residual Soil Slopes in a Tropical Climate. Earth Surface Processes and Landforms, 27(3), 317-338.
dc.identifier.uri http://hdl.handle.net/10220/7310
dc.description.abstract It is critical to understand and quantify the temporal and spatial variability in hillslope hydrological data in order to advance hillslope hydrological studies, evaluate distributed parameter hydrological models, analyse variability in hydrological response of slopes and design efficient field data sampling networks. The spatial and temporal variability of field-measured pore-water pressures in three residual soil slopes in Singapore was investigated using geostatistical methods. Parameters of the semivariograms, namely the range, sill and nugget effect, revealed interesting insights into the spatial structure of the temporal situation of pore-water pressures in the slopes. While informative, mean estimates have been shown to be inadequate for modelling purposes, indicator semivariograms together with mean prediction by kriging provide a better form of model input. Results also indicate that significant temporal and spatial variability in porewater pressures exists in the slope profile and thereby induces variability in hydrological response of the slope. Spatial and temporal variability in pore-water pressure decreases with increasing soil depth. The variability decreases during wet conditions as the slope approaches near saturation and the variability increases with high matric suction development following rainfall periods. Variability in pore-water pressures is greatest at shallow depths and near the slope crest and is strongly influenced by the combined action of microclimate, vegetation and soil properties.
dc.format.extent 22 p.
dc.language.iso en
dc.relation.ispartofseries Earth surface processes and landforms
dc.rights @ copyright 2002 John Wiley & Sons, Ltd.
dc.subject DRNTU::Engineering::Civil engineering::Geotechnical.
dc.title Spatial and temporal variability of pore-water pressures in residual soil slopes in a tropical climate
dc.type Journal Article
dc.contributor.school School of Civil and Environmental Engineering
dc.identifier.doi 10.1002/esp.322
dc.description.version Accepted version

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