Geomorphologic units of the Middle São Francisco River alluvial plain, Northeastern Brazil
Autor(a) principal: | |
---|---|
Data de Publicação: | 2022 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.20502/RBG.V23I1.1999 http://hdl.handle.net/11449/223377 |
Resumo: | The Sao Francisco rivers is the largest river draining the cratonic areas of Cerrado savanas and semiarid Caatinga environments in NE Brazil. This study presents the first geomorphologic map of the Middle Sao Francisco River, and describe the main morphosedimentary units of the alluvial plain. The use of high-resolution satellite images, digital elevation models, cores data from previous studies, and morphosedimentary field descriptions were the procedures applied. The morphological composition indicates that the alluvial plain is a mosaic of morphosedimentary units. Eight geomorphological units were recognized. The unit classified as Impeded Floodplain is the richest in terms of diversity of geomorphological features, and was sub-classify in seven morphosedimentary subunits. At least three fluvial stages must be responsible for building the current mosaic of morphologies displayed on the floodplain. It is likely that a braided channel is the oldest type of system that operated in the region and left marks on the preserved floodplain. Subsequently, an important wetter stage induced a change in the behavior of the main river to a multichannel type, responsible for the main features observed current. Finally, the current, drier stage, with lower river flow, has controlled the development of the bank accretion floodplain and fluvial-aeolian floodplain during the Late Holocene. Therefore, these paleohidrological variations of the São Francisco River must play a key role in the construction of the complex and floodplain relic of the Middle São Francisco River. |
id |
UNSP_b4eaf27be6bfd081d874cded60693f56 |
---|---|
oai_identifier_str |
oai:repositorio.unesp.br:11449/223377 |
network_acronym_str |
UNSP |
network_name_str |
Repositório Institucional da UNESP |
repository_id_str |
2946 |
spelling |
Geomorphologic units of the Middle São Francisco River alluvial plain, Northeastern BrazilUnidades geomorfológicas da planície aluvial do Médio Rio São Francisco, Nordeste do BrasilAlluvial plainGeomorphologyMiddle São Francisco RiverThe Sao Francisco rivers is the largest river draining the cratonic areas of Cerrado savanas and semiarid Caatinga environments in NE Brazil. This study presents the first geomorphologic map of the Middle Sao Francisco River, and describe the main morphosedimentary units of the alluvial plain. The use of high-resolution satellite images, digital elevation models, cores data from previous studies, and morphosedimentary field descriptions were the procedures applied. The morphological composition indicates that the alluvial plain is a mosaic of morphosedimentary units. Eight geomorphological units were recognized. The unit classified as Impeded Floodplain is the richest in terms of diversity of geomorphological features, and was sub-classify in seven morphosedimentary subunits. At least three fluvial stages must be responsible for building the current mosaic of morphologies displayed on the floodplain. It is likely that a braided channel is the oldest type of system that operated in the region and left marks on the preserved floodplain. Subsequently, an important wetter stage induced a change in the behavior of the main river to a multichannel type, responsible for the main features observed current. Finally, the current, drier stage, with lower river flow, has controlled the development of the bank accretion floodplain and fluvial-aeolian floodplain during the Late Holocene. Therefore, these paleohidrological variations of the São Francisco River must play a key role in the construction of the complex and floodplain relic of the Middle São Francisco River.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Universidade de São PauloUNESP Instituto de Geociência e Ciências Exatas Programa de Pós-Graduação em Geociências e Meio Ambiente, SPUFG Programa de Pós-Graduação em Ciências Ambientais, GOUNESP Instituto de Geociência e Ciências Exatas Programa de Pós-Graduação em Geociências e Meio Ambiente, SPUniversidade Estadual Paulista (UNESP)Programa de Pós-Graduação em Ciências AmbientaisSantos, Landerlei Almeida [UNESP]Latrubesse, Edgardo Manuel2022-04-28T19:50:16Z2022-04-28T19:50:16Z2022-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1097-1115http://dx.doi.org/10.20502/RBG.V23I1.1999Revista Brasileira de Geomorfologia, v. 23, n. 1, p. 1097-1115, 2022.2236-56641519-1540http://hdl.handle.net/11449/22337710.20502/RBG.V23I1.19992-s2.0-85123838045Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPporRevista Brasileira de Geomorfologiainfo:eu-repo/semantics/openAccess2022-04-28T19:50:16Zoai:repositorio.unesp.br:11449/223377Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T18:46:06.194049Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Geomorphologic units of the Middle São Francisco River alluvial plain, Northeastern Brazil Unidades geomorfológicas da planície aluvial do Médio Rio São Francisco, Nordeste do Brasil |
title |
Geomorphologic units of the Middle São Francisco River alluvial plain, Northeastern Brazil |
spellingShingle |
Geomorphologic units of the Middle São Francisco River alluvial plain, Northeastern Brazil Santos, Landerlei Almeida [UNESP] Alluvial plain Geomorphology Middle São Francisco River |
title_short |
Geomorphologic units of the Middle São Francisco River alluvial plain, Northeastern Brazil |
title_full |
Geomorphologic units of the Middle São Francisco River alluvial plain, Northeastern Brazil |
title_fullStr |
Geomorphologic units of the Middle São Francisco River alluvial plain, Northeastern Brazil |
title_full_unstemmed |
Geomorphologic units of the Middle São Francisco River alluvial plain, Northeastern Brazil |
title_sort |
Geomorphologic units of the Middle São Francisco River alluvial plain, Northeastern Brazil |
author |
Santos, Landerlei Almeida [UNESP] |
author_facet |
Santos, Landerlei Almeida [UNESP] Latrubesse, Edgardo Manuel |
author_role |
author |
author2 |
Latrubesse, Edgardo Manuel |
author2_role |
author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) Programa de Pós-Graduação em Ciências Ambientais |
dc.contributor.author.fl_str_mv |
Santos, Landerlei Almeida [UNESP] Latrubesse, Edgardo Manuel |
dc.subject.por.fl_str_mv |
Alluvial plain Geomorphology Middle São Francisco River |
topic |
Alluvial plain Geomorphology Middle São Francisco River |
description |
The Sao Francisco rivers is the largest river draining the cratonic areas of Cerrado savanas and semiarid Caatinga environments in NE Brazil. This study presents the first geomorphologic map of the Middle Sao Francisco River, and describe the main morphosedimentary units of the alluvial plain. The use of high-resolution satellite images, digital elevation models, cores data from previous studies, and morphosedimentary field descriptions were the procedures applied. The morphological composition indicates that the alluvial plain is a mosaic of morphosedimentary units. Eight geomorphological units were recognized. The unit classified as Impeded Floodplain is the richest in terms of diversity of geomorphological features, and was sub-classify in seven morphosedimentary subunits. At least three fluvial stages must be responsible for building the current mosaic of morphologies displayed on the floodplain. It is likely that a braided channel is the oldest type of system that operated in the region and left marks on the preserved floodplain. Subsequently, an important wetter stage induced a change in the behavior of the main river to a multichannel type, responsible for the main features observed current. Finally, the current, drier stage, with lower river flow, has controlled the development of the bank accretion floodplain and fluvial-aeolian floodplain during the Late Holocene. Therefore, these paleohidrological variations of the São Francisco River must play a key role in the construction of the complex and floodplain relic of the Middle São Francisco River. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-04-28T19:50:16Z 2022-04-28T19:50:16Z 2022-01-01 |
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/10.20502/RBG.V23I1.1999 Revista Brasileira de Geomorfologia, v. 23, n. 1, p. 1097-1115, 2022. 2236-5664 1519-1540 http://hdl.handle.net/11449/223377 10.20502/RBG.V23I1.1999 2-s2.0-85123838045 |
url |
http://dx.doi.org/10.20502/RBG.V23I1.1999 http://hdl.handle.net/11449/223377 |
identifier_str_mv |
Revista Brasileira de Geomorfologia, v. 23, n. 1, p. 1097-1115, 2022. 2236-5664 1519-1540 10.20502/RBG.V23I1.1999 2-s2.0-85123838045 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
Revista Brasileira de Geomorfologia |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
1097-1115 |
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_ |
1808128976459137024 |