Biblioteca Digital de VanguardiaMorphological and Geological Susceptibility to Landslides in the Paraitinga-Paraibuna Plateau (SP)
The Paraitinga - Paraibuna Plateau is composed by high and elongated hills, with convex tops and steep slopes. This relief is conditioned by the geological structures, such as folds and strike-slip faults; the lithology is composed by medium grade metamorphic rocks and intrusive sintectonic igneous...
| Autores principales: | , , |
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| Formato: | info:eu-repo/semantics/article |
| Lenguaje: | Portugués |
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Universidade de São Paulo. Faculdade de Filosofia, Letras e Ciências Humanas
2018
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| Acceso en línea: | https://www.revistas.usp.br/rdg/article/view/148486 http://biblioteca-repositorio.clacso.edu.ar/handle/CLACSO/42313 |
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| author | Oliveira, Maria Rita Pelegrin de Carvalho Vieira, Bianca Ross, Jurandyr Luciano Sanches |
| author_facet | Oliveira, Maria Rita Pelegrin de Carvalho Vieira, Bianca Ross, Jurandyr Luciano Sanches |
| author_sort | Oliveira, Maria Rita Pelegrin de |
| collection | Repositorio |
| description | The Paraitinga - Paraibuna Plateau is composed by high and elongated hills, with convex tops and steep slopes. This relief is conditioned by the geological structures, such as folds and strike-slip faults; the lithology is composed by medium grade metamorphic rocks and intrusive sintectonic igneous rocks. These morphological and lithostructural features can behave as conditioning factors of landslides- recurring processes on the Paraitinga – Paraibuna Plateau. Thus, the aim of this work was to evaluate the susceptibility to landslides considering geological and morphological aspects of the relief. To evaluate the susceptibility to landslides, the Landslide Potential Index (LP) method was applied. This index is defined by the ratio of the number of scars of each class by the area of each class, the results expressed in percentage (%).The partial results showed that the lithological class of the nebulitc metatexite was the most prone to failure, with a landslide potential value of 222%; and the slope angle class of 30 ° -58 ° was the less stable, with a landslide potential value of 250%. It was also observed that the landslides were concentrated along fold axes and strike-slip faults, indicating a possible structural control. |
| format | info:eu-repo/semantics/article |
| id | clacso-CLACSO42313 |
| institution | CLACSO, Repositorio Digital |
| language | Portugués |
| publishDate | 2018 |
| publisher | Universidade de São Paulo. Faculdade de Filosofia, Letras e Ciências Humanas |
| record_format | greenstone |
| spelling | clacso-CLACSO423132022-03-17T15:14:41Z Morphological and Geological Susceptibility to Landslides in the Paraitinga-Paraibuna Plateau (SP) Suscetibilidade Morfológica e Geológica aos Escorregamentos no Planalto de Paraitinga-Paraibuna (SP) Oliveira, Maria Rita Pelegrin de Carvalho Vieira, Bianca Ross, Jurandyr Luciano Sanches Landslide Scar Landslide Potential Index Lithostructure Slope Angle Cicatriz de Escorregamento Índice de Potencial de Escorregamento Litoestrutura Ângulo de Encosta The Paraitinga - Paraibuna Plateau is composed by high and elongated hills, with convex tops and steep slopes. This relief is conditioned by the geological structures, such as folds and strike-slip faults; the lithology is composed by medium grade metamorphic rocks and intrusive sintectonic igneous rocks. These morphological and lithostructural features can behave as conditioning factors of landslides- recurring processes on the Paraitinga – Paraibuna Plateau. Thus, the aim of this work was to evaluate the susceptibility to landslides considering geological and morphological aspects of the relief. To evaluate the susceptibility to landslides, the Landslide Potential Index (LP) method was applied. This index is defined by the ratio of the number of scars of each class by the area of each class, the results expressed in percentage (%).The partial results showed that the lithological class of the nebulitc metatexite was the most prone to failure, with a landslide potential value of 222%; and the slope angle class of 30 ° -58 ° was the less stable, with a landslide potential value of 250%. It was also observed that the landslides were concentrated along fold axes and strike-slip faults, indicating a possible structural control. O Planalto de Paraitinga – Paraibuna é uma morfoescultura cujo modelado de relevo é de morros altos, alongados, com topos convexos e encostas de alta declividade. Este modelado de relevo está condicionado às estruturas geológicas de dobras, falhas transcorrentes e uma litologia composta por rochas de médio grau metamórfico e rochas ígneas intrusivas sintectônicas. A conjugação destas características morfológicas e litoestruturais podem agir como fatores condicionantes dos movimentos de massa - processos recorrentes na região. Assim, objetivo deste trabalho foi avaliar a suscetibilidade aos escorregamentos considerando aspectos geológicos e morfológicos do relevo. Aplicou-se o método do índice de potencial de escorregamento para avaliar o grau de suscetibilidade aos escorregamentos, considerando a relação entre o inventário de ciatrizes, o ângulo de encosta e a litologia. Os resultados parciais mostraram que a classe litológica do metatexito nebulítico foi a mais suscetível à ruptura, com valor de potencial de escorregamento de 222%; e a classe de ângulo de encosta de 30°-58° foi a mais suscetível aos escorregamentos, apresentando um valor de potencial de escorregamento de 250%. Notou-se também que os escorregamentos se concentraram ao longo de eixos de dobra e de falhas transcorrentes, indicando um possível controle estrutural. Para ser confirmado, necessita-se dados sobre a relação entre a geometria dos planos de descontinuidades (foliação, xistosidade e/ou bandamento), geometria das encostas e os escorregamentos. 2018-09-09 2022-03-17T15:14:41Z 2022-03-17T15:14:41Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion https://www.revistas.usp.br/rdg/article/view/148486 10.11606/rdg.v0ispe.148486 http://biblioteca-repositorio.clacso.edu.ar/handle/CLACSO/42313 por https://www.revistas.usp.br/rdg/article/view/148486/147237 Copyright (c) 2018 Maria Rita Pelegrin de Oliveira, Bianca Carvalho Vieira, Maurício Liska Borba, Jurandyr Luciano Sanches Ross application/pdf Universidade de São Paulo. Faculdade de Filosofia, Letras e Ciências Humanas Revista do Departamento de Geografia; II Workshop Programa de Pós-Graduação em Geografia Física; 93-106 Revista do Departamento de Geografia; II Workshop Programa de Pós-Graduação em Geografia Física; 93-106 Revista do Departamento de Geografia; II Workshop Programa de Pós-Graduação em Geografia Física; 93-106 2236-2878 0102-4582 |
| spellingShingle | Landslide Scar Landslide Potential Index Lithostructure Slope Angle Cicatriz de Escorregamento Índice de Potencial de Escorregamento Litoestrutura Ângulo de Encosta Oliveira, Maria Rita Pelegrin de Carvalho Vieira, Bianca Ross, Jurandyr Luciano Sanches Morphological and Geological Susceptibility to Landslides in the Paraitinga-Paraibuna Plateau (SP) |
| title | Morphological and Geological Susceptibility to Landslides in the Paraitinga-Paraibuna Plateau (SP) |
| title_full | Morphological and Geological Susceptibility to Landslides in the Paraitinga-Paraibuna Plateau (SP) |
| title_fullStr | Morphological and Geological Susceptibility to Landslides in the Paraitinga-Paraibuna Plateau (SP) |
| title_full_unstemmed | Morphological and Geological Susceptibility to Landslides in the Paraitinga-Paraibuna Plateau (SP) |
| title_short | Morphological and Geological Susceptibility to Landslides in the Paraitinga-Paraibuna Plateau (SP) |
| title_sort | morphological and geological susceptibility to landslides in the paraitinga-paraibuna plateau (sp) |
| topic | Landslide Scar Landslide Potential Index Lithostructure Slope Angle Cicatriz de Escorregamento Índice de Potencial de Escorregamento Litoestrutura Ângulo de Encosta |
| url | https://www.revistas.usp.br/rdg/article/view/148486 http://biblioteca-repositorio.clacso.edu.ar/handle/CLACSO/42313 |