Caracterização geomorfológica e morfométrica do gráben do rio Goiana – Pernambuco (Geomorphological and morphometric characterization of Graben the Goiana river – Pernambuco)
DOI:
https://doi.org/10.26848/rbgf.v9.6.p1928-1942Keywords:
Gráben do Rio Goiana, neotectônica, intervenções antropogênicas.Abstract
Esse trabalho visa fazer a caracterização neotectônica da área de estudo por meio da análise morfológica da rede de drenagem e de cálculos morfométricos destinados à detecção de tectônica recente. A área em questão está localizada em um gráben pós-mioceno onde podem ser observados riscos geológico-geomorfológicos e impactos ambientais provenientes da intensa intervenção antropogênica. Para a realização desse estudo fez-se necessário uma pesquisa e o levantamento de dados pretéritos sobre a área de estudo tomando como base os dados obtidos por meio da vetorização das cartas topográficas de Goiana e Tejucupapo na escala de 1:25.000 com equidistância das curvas de nível de 10 m. Foram utilizadas técnicas de geoprocessamento para geração dos produtos cartográficos: cartas hipsométrica, de declividade e o Modelo Digital de Elevação (MDE). Os cálculos morfométricos aplicados para a análise neotectônica foram o Índice Relação Declividade/Extensão (RDE) e o índice Razão Fundo/Altura de Vale (RFAV). Os resultados obtidos indicam uma forte influência neotectônica no padrão de drenagem da área, assim como também, fica evidenciado a interferência antropogênica presente na área investigada e suas adjacências.
A B S T R A C T
This article aims to make neotectonics characterization of the study area by making the morphological analysis of the drainage network and morphometric calculations for the recent tectonics detection. The area in question is located in a post-Miocene graben where it can be observed geological and geomorphological hazards and environmental impacts from intense anthropogenic intervention. For the realization of this study was necessary research and survey of past data on the study area based on the data obtained through vectorization of topographic maps of Goiana and Tejucupapo on the scale of 1:25.000 with equidistance of 10 m curves level. Geoprocessing techniques were used for generation of cartographic products: hipsometric letters, slope and digital elevation model (DEM). Morphometric calculations applied to the neotectonic analysis were the Index Value Slope/Extension (RDE) and the index Reason Fund/Valley Height (RFAV). The results indicate a strong neotectonics influence in the drainage pattern of the area, as also evidenced anthropogenic interference present in the investigated area and its surroundings.
Keywords: Graben of the Goiana River; neotectonics; anthropogenic interventions.
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Copyright (c) 2016 Jaqueline Carla Roque Vicente, Max Furrier, Gabriel da Nóbrega Monteiro
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