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dc.contributor.authorEkanayake, Jagath C.
dc.date.accessioned2010-04-27T23:06:20Z
dc.date.available2010-04-27T23:06:20Z
dc.date.issued1990
dc.identifier.urihttps://hdl.handle.net/10182/1761
dc.description.abstractThe present work is a contribution to description and understanding of the distribution and movement of water in swelling soils. In order to investigate the moisture distribution in swelling soils a detailed knowledge of volume change properties, flow characteristics and total potential of water in the soil is essential. Therefore, a possible volume change mechanism is first described by dividing the swelling soils into four categories and volume change of a swelling soil is measured under different overburden pressures. The measured and calculated (from volume change data) overburden potential components are used to check the validity of the derivation of a load factor, ∝. Moisture diffusivity in swelling soil under different overburden pressures is measured using Gardner's (1956) outflow method. Behaviour of equilibrium moisture profiles in swelling soils is theoretically explained, solving the differential equation by considering the physical variation of individual soil properties with moisture content and overburden pressure. Using the measured volume change data and moisture potentials under various overburden pressures, the behaviour of possible moisture profiles are described at equilibrium and under steady vertical flows in swelling soils. It is shown that high overburden pressures lead to soil water behaviour quite different from any previously reported.en
dc.language.isoen
dc.publisherLincoln University
dc.rights.urihttps://researcharchive.lincoln.ac.nz/page/rights
dc.subjectsoil moistureen
dc.subjectsoil absorptionen
dc.subjectsoil adsorptionen
dc.subjectsoil water movementen
dc.subjectswelling soilen
dc.subjectmoisture contenten
dc.subjectequilibrium moisture profilesen
dc.subjectunsaturated soilsen
dc.subjectsoil hydrologyen
dc.titleSoil water movement through swelling soilsen
dc.typeThesisen
thesis.degree.grantorLincoln Universityen
thesis.degree.levelDoctoralen
thesis.degree.nameDoctor of Philosophyen
dc.subject.marsdenFields of Research::290000 Engineering and Technology::299900 Other Engineering and Technology::299901 Agricultural engineeringen
dc.subject.marsdenFields of Research::260000 Earth Sciences::260500 Hydrologyen
dc.subject.marsdenFields of Research::300000 Agricultural, Veterinary and Environmental Sciences::300100 Soil and Water Sciences::300105 Applied hydrology (drainage, flooding, irrigation, quality etc)en
lu.thesis.supervisorPainter, D. J.
lu.contributor.unitDepartment of Environmental Management


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