Comportamento erosivo de um sistema pedológico de Umuarama, noroeste do Paraná

Abstract

The town of Umuarama, Northwest of Paraná, presents sandy and medium-textured soil, derived from Cretaceous Caiuá Formation Sandstone. Besides the natural fragility of these soils, deforestation, use and generalized occupation have contributed to the identification of erosive processes. A slope next to the urban area was selected for a toposequence study aiming at a macro and micromorphological pedologic characterization followed by a physicohydric characterization of the pedologic horizons. The data allowed to reach some important conclusions concerning material behavior, hydric flows, and soil erosion dynamics, making it possible to distinguish slope sections of greater or smaller erosion risks.