Caracterização da fragilidade a processos erosivos das unidades de paisagem do município de Marechal Cândido Rondon - Paraná

Abstract

The soil erosion is the process of removal, transport and deposition of materials promoting the relief s sculpturing. Those processes are result of the interaction between natural and anthropic elements, that determinate the existence of different levels of weaknesses to erosion according to the environment in which they occur. In this scene, the anthropic activities are an acceleration factor of the erosive processes due to the hydrous dynamic modification promoted along the versants. In this same perspective, the current work had as main purpose the identification and comprehension of the weakness to erosion in the landscapes units in Marechal Cândido Rondon city, Paraná state. This study starts with the existent partitioning, it offered data basement especially about the characteristics connected to the relation soil versus relief and their constraints about usages and occupations made in each unit. At the same time, the preparation of cartographic documents and the identification and characterization of the erosive processes in each unit have permitted to verify that the municipality erosive processes weakness is not originated from natural aspects, but from the usages and occupations already made. It was possible to notice that the urban usages and occupations have been promoting a higher potential to erosive processes, due to the drastic modification of the runoffs and the rainwater infiltration in the water basins located close to the urban cores, especially Marechal Cândido Rondon, because it has a bigger sealing and the most intense erosive forms. The obtained data has permitted to point out some important suggestions to the urban planning of the municipality