Drying and wetting characteristics of a two-layer soil column.

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Drying and wetting characteristics of a two-layer soil column.

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Title: Drying and wetting characteristics of a two-layer soil column.
Author: Indrawan, I. Gde Budi.; Rahardjo, Harianto.; Leong, Eng Choon.
Copyright year: 2007
Abstract: The drying and wetting characteristics of a two-layer soil column consisting of a 50 cm thick soil mixture over a 50 cm thick gravelly sand were investigated in this study. A series of infiltration tests were conducted in the laboratory through an infiltration column apparatus equipped with a tensiometer–transducer system, time-domain reflectometry, and water flow measurement system. Numerical analyses were performed using a finite element model to simulate water infiltration into the laboratory model under steady-state and transient conditions. The experimental data and numerical simulation results showed that static nonequilibrium profiles of pore-water pressure head were developed in the gravelly sand shortly after a drying process was started. The low unsaturated permeability of the gravelly sand resulted in a delay in downward water flow into the lower soil layer during a wetting process portion of the rainfall test.
Subject: DRNTU::Engineering::Civil engineering::Geotechnical.
Type: Journal Article
Series/ Journal Title: Canadian geotechnical journal
School: School of Civil and Environmental Engineering
Rights: © 2007 Canadian Science Publishing
Version: Accepted version

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