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

Detalhes bibliográficos
Autor(a) principal: Teixeira, Daniel D.B.
Data de Publicação: 2018
Outros Autores: Marques, José [UNESP], Siqueira, Diego S. [UNESP], Vasconcelos, Vinicius, Carvalho, Osmar A., Martins, Éder S., Pereira, Gener T. [UNESP]
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1016/j.catena.2017.12.038
http://hdl.handle.net/11449/175840
Resumo: This 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.
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spelling Mapping units based on spatial uncertainty of magnetic susceptibility and clay contentGeostatisticsPedometricsSequential Gaussian simulationThis 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.Center of Agrarian Sciences University of Marília (Unimar)Department of Soils and Fertilizers State University of São Paulo (UNESP) Research Group CSME — Soil Characterization for Specific Management, JaboticabalDepartment of Ecology University of Brasília (UNB) LSIE — Laboratory of Spatial Information SystemsDepartment of Geography University of Brasília (UNB) LSIE — Laboratory of Spatial Information SystemsEmbrapa CerradosDepartment of Exact Sciences State University of São Paulo (UNESP) Research Group CSME — Soil Characterization for Specific Management, JaboticabalDepartment of Soils and Fertilizers State University of São Paulo (UNESP) Research Group CSME — Soil Characterization for Specific Management, JaboticabalDepartment of Exact Sciences State University of São Paulo (UNESP) Research Group CSME — Soil Characterization for Specific Management, JaboticabalUniversity of Marília (Unimar)Universidade Estadual Paulista (Unesp)LSIE — Laboratory of Spatial Information SystemsEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA)Teixeira, Daniel D.B.Marques, José [UNESP]Siqueira, Diego S. [UNESP]Vasconcelos, ViniciusCarvalho, Osmar A.Martins, Éder S.Pereira, Gener T. [UNESP]2018-12-11T17:17:48Z2018-12-11T17:17:48Z2018-05-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article79-87application/pdfhttp://dx.doi.org/10.1016/j.catena.2017.12.038Catena, v. 164, p. 79-87.0341-8162http://hdl.handle.net/11449/17584010.1016/j.catena.2017.12.0382-s2.0-850415699802-s2.0-85041569980.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengCatena1,246info:eu-repo/semantics/openAccess2024-06-07T14:24:07Zoai:repositorio.unesp.br:11449/175840Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T21:52:53.681349Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Mapping units based on spatial uncertainty of magnetic susceptibility and clay content
title Mapping units based on spatial uncertainty of magnetic susceptibility and clay content
spellingShingle Mapping units based on spatial uncertainty of magnetic susceptibility and clay content
Teixeira, Daniel D.B.
Geostatistics
Pedometrics
Sequential Gaussian simulation
title_short Mapping units based on spatial uncertainty of magnetic susceptibility and clay content
title_full Mapping units based on spatial uncertainty of magnetic susceptibility and clay content
title_fullStr Mapping units based on spatial uncertainty of magnetic susceptibility and clay content
title_full_unstemmed Mapping units based on spatial uncertainty of magnetic susceptibility and clay content
title_sort Mapping units based on spatial uncertainty of magnetic susceptibility and clay content
author Teixeira, Daniel D.B.
author_facet Teixeira, Daniel D.B.
Marques, José [UNESP]
Siqueira, Diego S. [UNESP]
Vasconcelos, Vinicius
Carvalho, Osmar A.
Martins, Éder S.
Pereira, Gener T. [UNESP]
author_role author
author2 Marques, José [UNESP]
Siqueira, Diego S. [UNESP]
Vasconcelos, Vinicius
Carvalho, Osmar A.
Martins, Éder S.
Pereira, Gener T. [UNESP]
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv University of Marília (Unimar)
Universidade Estadual Paulista (Unesp)
LSIE — Laboratory of Spatial Information Systems
Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
dc.contributor.author.fl_str_mv Teixeira, Daniel D.B.
Marques, José [UNESP]
Siqueira, Diego S. [UNESP]
Vasconcelos, Vinicius
Carvalho, Osmar A.
Martins, Éder S.
Pereira, Gener T. [UNESP]
dc.subject.por.fl_str_mv Geostatistics
Pedometrics
Sequential Gaussian simulation
topic Geostatistics
Pedometrics
Sequential Gaussian simulation
description This 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.
publishDate 2018
dc.date.none.fl_str_mv 2018-12-11T17:17:48Z
2018-12-11T17:17:48Z
2018-05-01
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.1016/j.catena.2017.12.038
Catena, v. 164, p. 79-87.
0341-8162
http://hdl.handle.net/11449/175840
10.1016/j.catena.2017.12.038
2-s2.0-85041569980
2-s2.0-85041569980.pdf
url http://dx.doi.org/10.1016/j.catena.2017.12.038
http://hdl.handle.net/11449/175840
identifier_str_mv Catena, v. 164, p. 79-87.
0341-8162
10.1016/j.catena.2017.12.038
2-s2.0-85041569980
2-s2.0-85041569980.pdf
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Catena
1,246
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 79-87
application/pdf
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
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