GEOGRAPHIC INFORMATION SYSTEM APLICADO AO CALCULO DE INDICES MORFOMETRICOS EM BACIA HIDROGRAFICA

• Published in: Geo UERJ : revista do Departamento de Geografia 2016-01 (28), p.44
• Main Authors: Leite, Marcos Esdras, Rocha, Andre Medeiros
• Format: Article
• Language: Spanish
• ISSN: 1415-7543
• DOI: 10.12957/geouerj.2016.18520

The geomorphology constitutes a scientific branch who aims to study the relief forms, with special focus in the analysis of its genesis and evolution. About that, basing in the main theories over the existence of variety of relief forms (as Penck and Davis theories), Guerra and Guerra (2011) state that the simultaneous or alternating action of the internal and external forces over the surface are responsible for its irregularities. Thereafter, this set of forms presented by relief since its genesis until present day describe its development or evolution cycle. Based on the above and with special attention on the geomorphological studies of drainage basins, Horton (1945) attests his worrying about the lack of tools for adequate investigation of the level of relief development, judging that the researches so far were based fundamentally in qualitative aspects. So, in order to fix such questions, the mentioned author advises the use of quantitative tools for more incise studies over the level of relief development. In that way, the present paper aims to analyze the relief of Vieira river drainage basin through morphometric indices presented by Christofoletti (1980), having as fundamental base the studies of Horton (1945) and Strahler (1952 and 1957). In order to obtain the morphometric variables, in Geographic Information System (GIS) environment, the altimetry data of Digital Elevation Model (DEM) from SRTM mission were used as base. At end, the indexes indicated mainly that the Basin of Vieira River has relief predominantly between flat and wavy, with a drainage system weakly drained and erosive activity in stability stage.Keywords: Drainage Basin; Morphometric Variables; GIS; DEM.A Geomorfologia constitui ramo cientifico que objetiva estudar as formas de relevo, com foco em especial na analise de sua genese e evolucao. Sobre isso, tendo por base as principais teorias sobre a existencia da variedade de formas do relevo (como as teorias penckiana e davisiana), Guerra e Guerra (2011) afirma que a acao simultanea ou alternada das forcas internas e externas sobre a superficie terrestre e responsavel por suas irregularidades. Por sua vez, esse conjunto de formas apresentado pelo relevo desde sua genese ate os dias atuais descreve seu desenvolvimento ou ciclo evolutivo. Com base no exposto e com foco em especial nos estudos geomorfologicos de bacias hidrograficas, Horton (1945) atesta sua preocupacao sobre a falta de ferramentas para investigacao adequada do nive