Influência Neotectônica Identificada Através de Dados Morfométricos e de Produtos Cartográficos na Bacia Hidrográfica do Rio Guruji (PB), Brasil (Influence Neotectonics Identified by Means of Morphometric Data and Cartographic Products in the Guruji...)
DOI:
https://doi.org/10.26848/rbgf.v4i1.232668Keywords:
Neotectônica, Morfometria, Drenagem assimétrica, Rio Guruji.Abstract
O presente estudo tem como objetivo apontar evidências de neotectônica na bacia hidrográfica do rio Guruji através de análise morfométrica e produtos cartográficos. A área investigada está localizada no litoral sul do Estado da Paraíba, Nordeste do Brasil; e a bacia hidrográfica em análise possui drenagem assimétrica com afluentes muito mais avantajados em sua porção sul. A metodologia empregada para detecção de influências neotectônicas consiste na análise e interpretação de dados numéricos obtidos nas cartas topográficas e no Modelo Numérico do Terreno (MNT) e de seus produtos derivados (carta clinográfica e modelo em 3D). O cálculo morfométrico aplicado para a análise neotectônica foi Razão Fundo/Altura de Vale (RFAV) e o Índice Relação Declividade-Extensão (RDE); e para averiguação da declividade de todas as vertentes que compõem a bacia hidrográfica foi confeccionada a carta clinográfica, que possibilitou uma visão mais abrangente e precisa de recuos de cabeceira, entalhamentos fluviais e desníveis de origem neotectônica.
Palavras - chave: Neotectônica; Morfometria; Drenagem assimétrica; Rio Guruji
Influence Neotectonics Identified by Means of Morphometric Data and Cartographic Products in the Guruji River Watershed (PB), Brazil
ABSTRACT
This study aims to point out evidence of neotectonics in Guruji’s river watershed through morphometric analysis and cartographic products. The study area is located on the south coast of Paraiba State, Northeast Brazil; and the watershed in question has asymmetric drainage with tributaries more advantageous in the south portion. The methodology used for detection of neotectonic influences consist in the analysis and interpretation of numerical data obtained in the topographic maps and Digital Elevation Model (DEM) and its derivatives (Slope map and 3D terrain model). The calculation used for the morphometric analysis neotectonic was Valley Floor-Valley Height (Vf) and the Hack Method – Slope Vs. Length (SL); and to investigate the slope of all mountain slope that make up the watershed was made the Slope map, which allowed a more comprehensive and accurate regressive erosion of drainage, incising fluvial and unevenness of tectonic origin.
Keywords: Neotectonics; Morphometric; Drainage asymmetric; Guruji River
Downloads
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2011 Maria Emanuella Firmino Barbosa, Max Furrier
This work is licensed under a Creative Commons Attribution 4.0 International License.
Authors who publish with Revista Brasileira de Geografia Física agree to the following terms:
Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under the Creative Commons Attribution 4.0 International (CC BY 4.0) license that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
Authors are permitted to make their work available online before or during the editorial process, on academic social networks, digital repositories, or preprint servers. After publication in Revista Brasileira de Geografia Física, authors are expected to update the preprint or postprint versions on the platforms where they were originally made available, providing a link to the final published version and any other relevant information, with proper recognition of authorship and the initial publication in this journal.
You are free to:
Share — copy and redistribute the material in any medium or format for any purpose, even commercially.
Adapt — remix, transform, and build upon the material for any purpose, even commercially.
The licensor cannot revoke these freedoms as long as you follow the license terms.
Under the following terms:
Attribution — You must give appropriate credit , provide a link to the license, and indicate if changes were made . You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.
