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dc.contributorStockle, Claudioen_US
dc.creatorSommer, Rolfen_US
dc.date.accessioned2021-07-08T12:54:56Z
dc.date.available2021-07-08T12:54:56Z
dc.identifierhttps://mel.cgiar.org/dspace/limiteden_US
dc.identifier.citationRolf Sommer, Claudio Stockle. (1/8/2010). Correspondence between the Campbell and van Genuchten Soil-Water-Retention Models. JOURNAL OF IRRIGATION AND DRAINAGE ENGINEERING, 136 (8).en_US
dc.identifier.urihttps://hdl.handle.net/20.500.11766/13357
dc.description.abstractTwo methods are presented that allow converting the van Genuchten (VG) soil-water-retention (SWR) model parameters to equivalent parameters of the Campbell (C) model. The first method builds on an available solution to convert the VG model to an equivalent Brooks-Corey (BC) model, but accounts for the fact that the effective water content of the BC model and the C model are not the same, because the C model lacks the residual water content parameter, θr. The second method (II) relies on a curve-fitting exercise (minimizing the differences between the VG and C-SWR curves) to derive simultaneously the optimal capacity-matching point and SWR-matching point. Results indicate that the second method outperforms the first method and yields an improved equivalence. To bypass the time-consuming curve-fitting exercise, based on Method II two empirical regression equations are presented that allow rapid calculation of the two C-parameters, air-entry and Campbell-b, by the corresponding VG-SWR parameters.en_US
dc.languageenen_US
dc.publisherAmerican Society of Civil Engineersen_US
dc.sourceJOURNAL OF IRRIGATION AND DRAINAGE ENGINEERING;136,(2009)en_US
dc.subjectparameters (statistics)en_US
dc.subjectempirical equationsen_US
dc.titleCorrespondence between the Campbell and van Genuchten Soil-Water-Retention Modelsen_US
dc.typeJournal Articleen_US
dcterms.available2009-11-25en_US
dcterms.issued2010-08-01en_US
cg.creator.idSommer, Rolf: 0000-0001-7599-9056en_US
cg.subject.agrovocmodelsen_US
cg.subject.agrovocsoil wateren_US
cg.subject.agrovocregression analysisen_US
cg.subject.agrovocsoil water retentionen_US
cg.subject.agrovocwater contenten_US
cg.contributor.centerInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.contributor.centerWashington State University - WSUen_US
cg.contributor.funderInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.contributor.projectCommunication and Documentation Information Services (CODIS)en_US
cg.contributor.project-lead-instituteInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.date.embargo-end-dateTimelessen_US
cg.contactr.sommer@cgiar.orgen_US
cg.identifier.doihttps://dx.doi.org/10.1061/(ASCE)IR.1943-4774.0000204en_US
cg.isijournalISI Journalen_US
dc.identifier.statusTimeless limited accessen_US
mel.impact-factor1.340en_US
cg.issn0733-9437en_US
cg.issn1943-4774en_US
cg.journalJOURNAL OF IRRIGATION AND DRAINAGE ENGINEERINGen_US
cg.issue8en_US
cg.volume136en_US


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