Mapping units based on spatial uncertainty of magnetic susceptibility and clay content

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dc.contributor.authorTeixeira, Daniel D.B.
dc.contributor.authorMarques, José [UNESP]
dc.contributor.authorSiqueira, Diego S. [UNESP]
dc.contributor.authorVasconcelos, Vinicius
dc.contributor.authorCarvalho, Osmar A.
dc.contributor.authorMartins, Éder S.
dc.contributor.authorPereira, Gener T. [UNESP]
dc.contributor.institutionUniversity of Marília (Unimar)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionLSIE — Laboratory of Spatial Information Systems
dc.contributor.institutionEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
dc.date.accessioned2018-12-11T17:17:48Z
dc.date.available2018-12-11T17:17:48Z
dc.date.issued2018-05-01
dc.description.abstractThis study aimed to use spatial uncertainty of magnetic susceptibility (MS) and clay content to improve soil-mapping units. In an experimental area of 870 ha, a regular sampling grid containing 371 points was set, in which MS and clay content were assessed at a depth range of 0–0.25 m. Using a digital elevation model and field observations, a 4440-m transect was established on the study area from hilltop to the foothill, toward the gentlest slope. Standard deviation maps based on 200 realizations of the sequential gaussian simulation measured spatial estimate uncertainties. To limit transition zones along the transect, uncertainty isolines representative of the transition between soil-mapping units were selected. Both attributes presented peaks of uncertainties near the change of mapping units, previously known. Uncertainty zones, previously delineated, ranged from 45 to 210 m and from 60 to 170 m, for MS and clay content, respectively. However, after extrapolating the uncertainties to the side of the transect, amplitude changes of the uncertainty zones were observed, especially in the transition regions between landscape shape and geology. Delineation of mapping units, which incorporated the uncertainties of MS and clay content, was similar. However, due to lower cost and promptness, MS becomes the most feasible alternative. Knowing spatial uncertainties enables readjusting limits in maps of soil-mapping units and may support identification of most favorable regions for determining modal pedon representative of each unit.en
dc.description.affiliationCenter of Agrarian Sciences University of Marília (Unimar)
dc.description.affiliationDepartment of Soils and Fertilizers State University of São Paulo (UNESP) Research Group CSME — Soil Characterization for Specific Management, Jaboticabal
dc.description.affiliationDepartment of Ecology University of Brasília (UNB) LSIE — Laboratory of Spatial Information Systems
dc.description.affiliationDepartment of Geography University of Brasília (UNB) LSIE — Laboratory of Spatial Information Systems
dc.description.affiliationEmbrapa Cerrados
dc.description.affiliationDepartment of Exact Sciences State University of São Paulo (UNESP) Research Group CSME — Soil Characterization for Specific Management, Jaboticabal
dc.description.affiliationUnespDepartment of Soils and Fertilizers State University of São Paulo (UNESP) Research Group CSME — Soil Characterization for Specific Management, Jaboticabal
dc.description.affiliationUnespDepartment of Exact Sciences State University of São Paulo (UNESP) Research Group CSME — Soil Characterization for Specific Management, Jaboticabal
dc.format.extent79-87
dc.identifierhttp://dx.doi.org/10.1016/j.catena.2017.12.038
dc.identifier.citationCatena, v. 164, p. 79-87.
dc.identifier.doi10.1016/j.catena.2017.12.038
dc.identifier.file2-s2.0-85041569980.pdf
dc.identifier.issn0341-8162
dc.identifier.scopus2-s2.0-85041569980
dc.identifier.urihttp://hdl.handle.net/11449/175840
dc.language.isoeng
dc.relation.ispartofCatena
dc.relation.ispartofsjr1,246
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectGeostatistics
dc.subjectPedometrics
dc.subjectSequential Gaussian simulation
dc.titleMapping units based on spatial uncertainty of magnetic susceptibility and clay contenten
dc.typeArtigo

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