Mapping units based on spatial uncertainty of magnetic susceptibility and clay content
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , , , , |
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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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 |
|
_version_ |
1808129369025019904 |