Use este identificador para citar ou linkar para este item: http://repositorio.ufla.br/jspui/handle/1/49728
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dc.creatorMelo, Marina Luciana Abreu de-
dc.creatorVan Lier, Quirijn de Jong-
dc.creatorArmindo, Robson André-
dc.date.accessioned2022-04-11T21:16:56Z-
dc.date.available2022-04-11T21:16:56Z-
dc.date.issued2021-
dc.identifier.citationMELO, M. L. A. de; VAN LIER, Q. de J.; ARMINDO, R. A. Conversion of soil water retention and conductivity parameters from van Genuchten–Mualem to Groenevelt and Grant model. Soil Research, Rome, v. 59, n. 8, p. 837-847, 2021. DOI: 10.1071/SR21051.pt_BR
dc.identifier.urihttps://doi.org/10.1071/SR21051pt_BR
dc.identifier.urihttp://repositorio.ufla.br/jspui/handle/1/49728-
dc.description.abstractThe van Genuchten–Mualem (VGM) model is used largely to represent the relative soil hydraulic conductivity and soil water retention functions [Kr(Θ) and Θ(h)]. Alternative equations proposed by Groenevelt and Grant (GRT) present advantages regarding mathematical versatility. Considering the VGM model cannot be analytically converted into the GRT model, this study empirically related parameters n and α (VGM) to parameters p and k (GRT). We used 90 value combinations of n and α and minimised the sum of squared differences between VGM and GRT models. Linear equations were fitted and validated using soil samples from the UNSODA database. A singular equation of p as a function of n was fitted, while a two-step procedure was required to correlate k and α. All fits resulted in very high precision (r ≥ 0.999) and accuracy (RMSD ≤ 0.025 m3 m−3) for the water retention function and very high precision (r ≥ 0.994) for the hydraulic conductivity function. The accuracy for the Kr(Θ) function was high (RMSD ≤ 0.50) for 34 of the 40 tested soils. The derived empirical equations can be used to convert the equation parameters for Θ(h) regardless of soil type, and for Kr(Θ) with some restrictions upon parameter combinations.pt_BR
dc.languageen_USpt_BR
dc.publisherCSIRO Publishingpt_BR
dc.rightsrestrictAccesspt_BR
dc.sourceSoil Researchpt_BR
dc.subjectHydraulic conductivitypt_BR
dc.subjectIncomplete beta functionpt_BR
dc.subjectIncomplete gamma functionpt_BR
dc.subjectMathematical modelspt_BR
dc.subjectSoil hydraulic propertiespt_BR
dc.subjectSoil physicspt_BR
dc.subjectSoil water retentionpt_BR
dc.subjectCondutividade hidráulicapt_BR
dc.subjectFunção beta incompletapt_BR
dc.subjectFunção gama incompletapt_BR
dc.subjectModelos matemáticospt_BR
dc.subjectPropriedades hidráulicas do solopt_BR
dc.subjectFísica do solopt_BR
dc.subjectRetenção de água no solopt_BR
dc.titleConversion of soil water retention and conductivity parameters from van Genuchten–Mualem to Groenevelt and Grant modelpt_BR
dc.typeArtigopt_BR
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