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Sociedade & Natureza

versión On-line ISSN 1982-4513

Resumen

TRENTIN, Romario; SANTOS, Leonardo José Cordeiro  y  ROBAINA, Luís Eduardo de Souza. Geomorphological compartmentation the Itu River basin: west of Rio Grande do Sul - Brazil. Soc. nat. [online]. 2012, vol.24, n.1, pp. 127-142. ISSN 1982-4513.  http://dx.doi.org/10.1590/S1982-45132012000100011.

The geomorphology is used to identify the forms of relief, through a study of its origin, structure, nature of the rocks, and climate of endogenous and exogenous factors responsible for the formation of patterned or certain elements of the earth's surface. In this sense, it was established a proposal for compartmentation the geomorphological Itu River basin. As a methodological basis of the work, we used the proposed Ross (1990, 1992), maps and discussions presented by Robaina et. al (2010) Ibicuí River basin. In mapping used topographic maps 1:50.000, satellite images and fieldwork. There were certain attributes of the drainage network, the terrain characteristics, the geological substrate and soil types. The integration of data and compilation of maps allowed the definition of different taxonomic levels. In the first three levels of compartmentation was used as the basis Ibicuí River basin. From the fourth level taxonomic settled geomorphological units specifically for the Itu River basin (BHRI), which defined eight units of landforms: hills of sandstone, sandstone hillock, sandstone cornices, Ramp alluvial colluvium, flat-topped volcanic hills, steep terrain, hillock hills of volcanic rock and volcanic rock. In the fifth and sixth levels are presented, the shapes of the sections and the distinctive features of the landscape units, being more frequent bends straight-convergent and features sand and voçorrocas. The geomorphological analysis presents the key elements to managing the environment and, therefore, is an indispensable tool for environmental planning.

Palabras llave : Compartmentation geomorphological; Watershed; Gullies; Sands.

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