Migração dos meandros do baixo curso do rio Claro, Goiás: processos e fatores controladores
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFG |
Texto Completo: | http://repositorio.bc.ufg.br/tede/handle/tede/4979 |
Resumo: | Meanders rivers have sinuous channel with singular dynamic of lateral migration by eroding its concave bank and depositing on its convex bank. This dynamic is able to expand and restore fluvial environments when creates a sedimentary environments complex linked to development of floodplain. The nature of preexistent deposits on floodplain, which are remobilized by lateral migration, is important to interpret deposicional dynamics, being central to the identification evolution of meanders. Heterogeneity of the facies is formed by several cycles of sedimentary evolution through channel migration, generating a succession of deposits with different degree cohesion. These depositional environments affect the continuity migration and the evolution of meanders. It was researched the current evolution of meander and riparian vegetation influence and theirs deposit about lateral migration process on downstream Claro river. It was used aerial photographs, satellite images, facies analysis and pin set on the banks to identify the influences of vegetation and material in the migration processes of meanders. The channel showed high mobility verified by the high amount of migration process in 47 years, due to the planforms diffusion and oxbow lakes and by deposits and paleochannel sedimentary facies. The vegetation has not shown attenuating effect against the bank erosion in the two curves analyzed meanders, erosion rates for the segments with vegetation cover were up to 1,3m ahead of the environments of floodplain. It was found that the intensity of channel migration differs between the curves. Migration advances with little resistance from unconsolidated deposits of the current floodplain, whereas in older deposits, pedogenesis and consistent terraces have hindered lateral advance, due to theirs material. |
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Campos, Alfredo Borges dehttp://lattes.cnpq.br/3249635044992714Zancopé, Márcio Henrique de Camposhttp://lattes.cnpq.br/4592570099084884Campos, Alfredo Borges deBayer, MaximilianoRocha, Paulo Cézarhttp://lattes.cnpq.br/5154349506487621Castro, Wallas de Souza2015-12-03T07:39:02Z2015-06-24CASTRO, W. S. Migração dos meandros do baixo curso do rio Claro, Goiás: processos e fatores controladores. 2015. 98 f. Dissertação (Mestrado em Geografia) - Universidade Federal de Goiás, Goiânia, 2015.http://repositorio.bc.ufg.br/tede/handle/tede/4979Meanders rivers have sinuous channel with singular dynamic of lateral migration by eroding its concave bank and depositing on its convex bank. This dynamic is able to expand and restore fluvial environments when creates a sedimentary environments complex linked to development of floodplain. The nature of preexistent deposits on floodplain, which are remobilized by lateral migration, is important to interpret deposicional dynamics, being central to the identification evolution of meanders. Heterogeneity of the facies is formed by several cycles of sedimentary evolution through channel migration, generating a succession of deposits with different degree cohesion. These depositional environments affect the continuity migration and the evolution of meanders. It was researched the current evolution of meander and riparian vegetation influence and theirs deposit about lateral migration process on downstream Claro river. It was used aerial photographs, satellite images, facies analysis and pin set on the banks to identify the influences of vegetation and material in the migration processes of meanders. The channel showed high mobility verified by the high amount of migration process in 47 years, due to the planforms diffusion and oxbow lakes and by deposits and paleochannel sedimentary facies. The vegetation has not shown attenuating effect against the bank erosion in the two curves analyzed meanders, erosion rates for the segments with vegetation cover were up to 1,3m ahead of the environments of floodplain. It was found that the intensity of channel migration differs between the curves. Migration advances with little resistance from unconsolidated deposits of the current floodplain, whereas in older deposits, pedogenesis and consistent terraces have hindered lateral advance, due to theirs material.Rios meandrantes possuem canais fluviais sinuosos com dinâmica particular de migração lateral ao erodir suas margens côncavas e depositar nas margens convexas. Esta dinâmica é capaz de ampliar e renovar os ambientes fluviais ao criar um complexo ambiente sedimentar ligado ao desenvolvimento das planícies fluviais. A natureza dos depósitos preexistentes na planície, que são remobilizados pela migração lateral, é importante para a interpretação da dinâmica deposicional, sendo fundamental para identificação da evolução dos meandros. A heterogeneidade das fácies é formada por vários ciclos de evolução sedimentar pela migração do canal fluvial, gerando uma sucessão de depósitos com grau de coesão diferentes. Os próprios ambientes deposicionais afetam a continuidade da migração lateral e a evolução dos meandros. Investigou-se a evolução atual dos meandros e a influência da vegetação ripária ou ciliar e os seus antigos depósitos sobre os processos de migração lateral do baixo curso do rio Claro. Utilizou-se de fotografias aéreas, imagens orbitais, análise faciológica e pinos fixados nas margens para identificar as influências da vegetação e material nos processos de migração dos meandros. O canal fluvial apresentou alta mobilidade, verificada pela a elevada quantidade de processos de migração em 47 anos, em virtude da difusão de feições marginais e lagoas de meandros (oxbow lakes) e pelos depósitos e fácies sedimentares do paleocanal. A vegetação não apresentou efeito atenuador diante da erosão marginal nas duas curvas de meandros analisadas, as taxas de erosão para os segmentos com cobertura vegetal foram de até 1,3m de avanço sobre os ambientes da planície. Atestou que a intensidade da migração do canal apresenta diferenças entre as curvas. A migração avança com pouca resistência entre depósitos inconsolidados da planície fluvial atual, enquanto que nos depósitos mais antigos, pedogeneizados e consistentes dos terraços, tem avanço lateral dificultado, em função dos seus materiais.Submitted by Luciana Ferreira (lucgeral@gmail.com) on 2015-12-03T07:36:31Z No. of bitstreams: 2 Dissertação - Wallas de Souza Castro - 2015.pdf: 6091228 bytes, checksum: 3a8c31295dc00c579cd64b79adafcefb (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5)Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2015-12-03T07:39:02Z (GMT) No. of bitstreams: 2 Dissertação - Wallas de Souza Castro - 2015.pdf: 6091228 bytes, checksum: 3a8c31295dc00c579cd64b79adafcefb (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5)Made available in DSpace on 2015-12-03T07:39:02Z (GMT). No. of bitstreams: 2 Dissertação - Wallas de Souza Castro - 2015.pdf: 6091228 bytes, checksum: 3a8c31295dc00c579cd64b79adafcefb (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) Previous issue date: 2015-06-24application/pdfporUniversidade Federal de GoiásPrograma de Pós-graduação em Geografia (IESA)UFGBrasilInstituto de Estudos Socioambientais - IESA (RG)http://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessGeomorfologia fluvialErosão marginal e associação de fácies sedimentaresFluvial geomorphologyBank erosionAnalysis sedimentary faciesCIENCIAS HUMANAS::GEOGRAFIAMigração dos meandros do baixo curso do rio Claro, Goiás: processos e fatores controladoresImigration of meanders of Claro river’s downstream, Goias: processes and factors controllinginfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesis78882710595057041476006006004536785967207850203-599424733620574926reponame:Repositório Institucional da UFGinstname:Universidade Federal de Goiás (UFG)instacron:UFGLICENSElicense.txtlicense.txttext/plain; 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dc.title.por.fl_str_mv |
Migração dos meandros do baixo curso do rio Claro, Goiás: processos e fatores controladores |
dc.title.alternative.eng.fl_str_mv |
Imigration of meanders of Claro river’s downstream, Goias: processes and factors controlling |
title |
Migração dos meandros do baixo curso do rio Claro, Goiás: processos e fatores controladores |
spellingShingle |
Migração dos meandros do baixo curso do rio Claro, Goiás: processos e fatores controladores Castro, Wallas de Souza Geomorfologia fluvial Erosão marginal e associação de fácies sedimentares Fluvial geomorphology Bank erosion Analysis sedimentary facies CIENCIAS HUMANAS::GEOGRAFIA |
title_short |
Migração dos meandros do baixo curso do rio Claro, Goiás: processos e fatores controladores |
title_full |
Migração dos meandros do baixo curso do rio Claro, Goiás: processos e fatores controladores |
title_fullStr |
Migração dos meandros do baixo curso do rio Claro, Goiás: processos e fatores controladores |
title_full_unstemmed |
Migração dos meandros do baixo curso do rio Claro, Goiás: processos e fatores controladores |
title_sort |
Migração dos meandros do baixo curso do rio Claro, Goiás: processos e fatores controladores |
author |
Castro, Wallas de Souza |
author_facet |
Castro, Wallas de Souza |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Campos, Alfredo Borges de |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/3249635044992714 |
dc.contributor.advisor-co1.fl_str_mv |
Zancopé, Márcio Henrique de Campos |
dc.contributor.advisor-co1Lattes.fl_str_mv |
http://lattes.cnpq.br/4592570099084884 |
dc.contributor.referee1.fl_str_mv |
Campos, Alfredo Borges de |
dc.contributor.referee2.fl_str_mv |
Bayer, Maximiliano |
dc.contributor.referee3.fl_str_mv |
Rocha, Paulo Cézar |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/5154349506487621 |
dc.contributor.author.fl_str_mv |
Castro, Wallas de Souza |
contributor_str_mv |
Campos, Alfredo Borges de Zancopé, Márcio Henrique de Campos Campos, Alfredo Borges de Bayer, Maximiliano Rocha, Paulo Cézar |
dc.subject.por.fl_str_mv |
Geomorfologia fluvial Erosão marginal e associação de fácies sedimentares |
topic |
Geomorfologia fluvial Erosão marginal e associação de fácies sedimentares Fluvial geomorphology Bank erosion Analysis sedimentary facies CIENCIAS HUMANAS::GEOGRAFIA |
dc.subject.eng.fl_str_mv |
Fluvial geomorphology Bank erosion Analysis sedimentary facies |
dc.subject.cnpq.fl_str_mv |
CIENCIAS HUMANAS::GEOGRAFIA |
description |
Meanders rivers have sinuous channel with singular dynamic of lateral migration by eroding its concave bank and depositing on its convex bank. This dynamic is able to expand and restore fluvial environments when creates a sedimentary environments complex linked to development of floodplain. The nature of preexistent deposits on floodplain, which are remobilized by lateral migration, is important to interpret deposicional dynamics, being central to the identification evolution of meanders. Heterogeneity of the facies is formed by several cycles of sedimentary evolution through channel migration, generating a succession of deposits with different degree cohesion. These depositional environments affect the continuity migration and the evolution of meanders. It was researched the current evolution of meander and riparian vegetation influence and theirs deposit about lateral migration process on downstream Claro river. It was used aerial photographs, satellite images, facies analysis and pin set on the banks to identify the influences of vegetation and material in the migration processes of meanders. The channel showed high mobility verified by the high amount of migration process in 47 years, due to the planforms diffusion and oxbow lakes and by deposits and paleochannel sedimentary facies. The vegetation has not shown attenuating effect against the bank erosion in the two curves analyzed meanders, erosion rates for the segments with vegetation cover were up to 1,3m ahead of the environments of floodplain. It was found that the intensity of channel migration differs between the curves. Migration advances with little resistance from unconsolidated deposits of the current floodplain, whereas in older deposits, pedogenesis and consistent terraces have hindered lateral advance, due to theirs material. |
publishDate |
2015 |
dc.date.accessioned.fl_str_mv |
2015-12-03T07:39:02Z |
dc.date.issued.fl_str_mv |
2015-06-24 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
CASTRO, W. S. Migração dos meandros do baixo curso do rio Claro, Goiás: processos e fatores controladores. 2015. 98 f. Dissertação (Mestrado em Geografia) - Universidade Federal de Goiás, Goiânia, 2015. |
dc.identifier.uri.fl_str_mv |
http://repositorio.bc.ufg.br/tede/handle/tede/4979 |
identifier_str_mv |
CASTRO, W. S. Migração dos meandros do baixo curso do rio Claro, Goiás: processos e fatores controladores. 2015. 98 f. Dissertação (Mestrado em Geografia) - Universidade Federal de Goiás, Goiânia, 2015. |
url |
http://repositorio.bc.ufg.br/tede/handle/tede/4979 |
dc.language.iso.fl_str_mv |
por |
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por |
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7888271059505704147 |
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600 600 600 |
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4536785967207850203 |
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-599424733620574926 |
dc.rights.driver.fl_str_mv |
http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess |
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http://creativecommons.org/licenses/by-nc-nd/4.0/ |
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openAccess |
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Universidade Federal de Goiás |
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Programa de Pós-graduação em Geografia (IESA) |
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UFG |
dc.publisher.country.fl_str_mv |
Brasil |
dc.publisher.department.fl_str_mv |
Instituto de Estudos Socioambientais - IESA (RG) |
publisher.none.fl_str_mv |
Universidade Federal de Goiás |
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