Paleocanais no megaleque do rio Taquari: mapeamento e signifcado geomorfológico
Autor(a) principal: | |
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Data de Publicação: | 2011 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://rbg.sbgeo.org.br/index.php/rbg/article/view/17520 http://hdl.handle.net/11449/72333 |
Resumo: | This paper presents the results of the frst systematic mapping of the paleochannel network on the Taquari megafan (Pantanal, Brazil). We used remote sensing data collected by the ASTER sensor, which captures images with 15 m square pixels. A total of 34 scenes, acquired from 2001-2006, were used in the analysis. These data were processed using a decorrelation stretch technique in order to obtain a better visual identifcation of the paleochannels. The mapping procedure began with the overlay of a 1:50.000 IBGE articulation, in order to systematize the extraction of features and to reduce the subjectivity inherent to visual analysis methods. We mapped a total of 33,205 km of paleochannels. The density of these features is related to the relative ages of distinct geomorphological compartments, known as depositional lobes. The mapped features preserve avulsion events that occurred on the megafan. The results suggest that low-magnitude avulsions occur more frequently than larger events. |
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Paleocanais no megaleque do rio Taquari: mapeamento e signifcado geomorfológicoPaleochannels on Taquari river megafan, Pantanal, Brazil: Their mapping and geomorphological meaningAvulsionFuvial geomorphologyPantanal wetlandRemote sensingThis paper presents the results of the frst systematic mapping of the paleochannel network on the Taquari megafan (Pantanal, Brazil). We used remote sensing data collected by the ASTER sensor, which captures images with 15 m square pixels. A total of 34 scenes, acquired from 2001-2006, were used in the analysis. These data were processed using a decorrelation stretch technique in order to obtain a better visual identifcation of the paleochannels. The mapping procedure began with the overlay of a 1:50.000 IBGE articulation, in order to systematize the extraction of features and to reduce the subjectivity inherent to visual analysis methods. We mapped a total of 33,205 km of paleochannels. The density of these features is related to the relative ages of distinct geomorphological compartments, known as depositional lobes. The mapped features preserve avulsion events that occurred on the megafan. The results suggest that low-magnitude avulsions occur more frequently than larger events.Instituto Nacional de Pesquisas Espaciais (INPE) Programa de Pós-graduação em Sensoriamento Remoto, São José dos Campos, SPUniversidade Estadual Paulista (UNESP) Instituto de Geociências e Ciências Exatas, Rio Claro, SPUniversidade Estadual Paulista (UNESP) Instituto de Geociências e Ciências Exatas, Rio Claro, SPPrograma de Pós-graduação em Sensoriamento RemotoUniversidade Estadual Paulista (Unesp)Zani, HiranAssine, Mario Luis [UNESP]2014-05-27T11:25:30Z2014-05-27T11:25:30Z2011-03-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article37-43application/pdfhttp://rbg.sbgeo.org.br/index.php/rbg/article/view/17520Revista Brasileira de Geociencias, v. 41, n. 1, p. 37-43, 2011.0375-75362177-4382http://hdl.handle.net/11449/723332-s2.0-848568944082-s2.0-84856894408.pdf0471102133658128Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPporRevista Brasileira de Geocienciasinfo:eu-repo/semantics/openAccess2024-01-11T06:32:33Zoai:repositorio.unesp.br:11449/72333Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-01-11T06:32:33Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Paleocanais no megaleque do rio Taquari: mapeamento e signifcado geomorfológico Paleochannels on Taquari river megafan, Pantanal, Brazil: Their mapping and geomorphological meaning |
title |
Paleocanais no megaleque do rio Taquari: mapeamento e signifcado geomorfológico |
spellingShingle |
Paleocanais no megaleque do rio Taquari: mapeamento e signifcado geomorfológico Zani, Hiran Avulsion Fuvial geomorphology Pantanal wetland Remote sensing |
title_short |
Paleocanais no megaleque do rio Taquari: mapeamento e signifcado geomorfológico |
title_full |
Paleocanais no megaleque do rio Taquari: mapeamento e signifcado geomorfológico |
title_fullStr |
Paleocanais no megaleque do rio Taquari: mapeamento e signifcado geomorfológico |
title_full_unstemmed |
Paleocanais no megaleque do rio Taquari: mapeamento e signifcado geomorfológico |
title_sort |
Paleocanais no megaleque do rio Taquari: mapeamento e signifcado geomorfológico |
author |
Zani, Hiran |
author_facet |
Zani, Hiran Assine, Mario Luis [UNESP] |
author_role |
author |
author2 |
Assine, Mario Luis [UNESP] |
author2_role |
author |
dc.contributor.none.fl_str_mv |
Programa de Pós-graduação em Sensoriamento Remoto Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Zani, Hiran Assine, Mario Luis [UNESP] |
dc.subject.por.fl_str_mv |
Avulsion Fuvial geomorphology Pantanal wetland Remote sensing |
topic |
Avulsion Fuvial geomorphology Pantanal wetland Remote sensing |
description |
This paper presents the results of the frst systematic mapping of the paleochannel network on the Taquari megafan (Pantanal, Brazil). We used remote sensing data collected by the ASTER sensor, which captures images with 15 m square pixels. A total of 34 scenes, acquired from 2001-2006, were used in the analysis. These data were processed using a decorrelation stretch technique in order to obtain a better visual identifcation of the paleochannels. The mapping procedure began with the overlay of a 1:50.000 IBGE articulation, in order to systematize the extraction of features and to reduce the subjectivity inherent to visual analysis methods. We mapped a total of 33,205 km of paleochannels. The density of these features is related to the relative ages of distinct geomorphological compartments, known as depositional lobes. The mapped features preserve avulsion events that occurred on the megafan. The results suggest that low-magnitude avulsions occur more frequently than larger events. |
publishDate |
2011 |
dc.date.none.fl_str_mv |
2011-03-01 2014-05-27T11:25:30Z 2014-05-27T11:25:30Z |
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://rbg.sbgeo.org.br/index.php/rbg/article/view/17520 Revista Brasileira de Geociencias, v. 41, n. 1, p. 37-43, 2011. 0375-7536 2177-4382 http://hdl.handle.net/11449/72333 2-s2.0-84856894408 2-s2.0-84856894408.pdf 0471102133658128 |
url |
http://rbg.sbgeo.org.br/index.php/rbg/article/view/17520 http://hdl.handle.net/11449/72333 |
identifier_str_mv |
Revista Brasileira de Geociencias, v. 41, n. 1, p. 37-43, 2011. 0375-7536 2177-4382 2-s2.0-84856894408 2-s2.0-84856894408.pdf 0471102133658128 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
Revista Brasileira de Geociencias |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
37-43 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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1803047321661865984 |