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dc.contributor.authorMatthews, CJ
dc.contributor.authorCook, FJ
dc.contributor.authorKnight, JH
dc.contributor.authorBraddock, RD
dc.date.accessioned2017-05-03T11:35:47Z
dc.date.available2017-05-03T11:35:47Z
dc.date.issued2005
dc.date.modified2009-08-11T05:52:08Z
dc.identifier.issn0004-9573
dc.identifier.doi10.1071/SR05069
dc.identifier.urihttp://hdl.handle.net/10072/4428
dc.description.abstractIn general, the water content (?) form of Richards' equation is not used when modeling water flow through layered soil since ? is discontinuous across soil layers. Within the literature, there have been some examples of models developed for layered soils using the ?-form of Richards' equation. However, these models usually rely on an approximation of the discontinuity at the soil layer interface. For the first time, we will develop an iterative scheme based on Newton's method, to explicitly solve for ? at the interface between 2 soils within a numerical scheme. The numerical scheme used here is the Method of Lines (MoL); however, the principles of the iterative solution could be used in other numerical techniques. It will be shown that the iterative scheme is highly effective, converging within 1 to 2 iterations. To ensure the convergence behaviour holds, the numerical scheme will be tested on a fine-over-coarse and a coarse-over-fine soil with highly contrasting soil properties. For each case, the contrast between the soil types will be controlled artificially to extend and decrease the extent of the ? discontinuity. In addition, the numerical solution will be compared against a steady-state analytical solution and a numerical solution from the literature.
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.languageEnglish
dc.language.isoeng
dc.publisherCSIRO Publishing
dc.publisher.placeCollingwood, Vic.
dc.publisher.urihttp://www.publish.csiro.au/nid/84.htm
dc.relation.ispartofstudentpublicationN
dc.relation.ispartofpagefrom945
dc.relation.ispartofpageto955
dc.relation.ispartofissue8
dc.relation.ispartofjournalAustralian Journal of Soil Research
dc.relation.ispartofvolume43
dc.rights.retentionN
dc.subject.fieldofresearchcode260599
dc.titleHandling the water content discontinuity at the interface between layered soils within a numerical scheme
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.facultyGriffith Sciences, Griffith School of Environment
gro.rights.copyright© 2005 CSIRO. Please refer to the journal link for access to the definitive, published version.
gro.date.issued2005
gro.hasfulltextNo Full Text
gro.griffith.authorBraddock, Roger D.


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