Morpholithological units determination in the Itu River Basin: west part of the state of Rio Grande do Sul

Abstract

The following paper aims at presenting studies and mappings of the morpholitological units of the basin of the Itu River, which lies in the west of the state of Rio Grande do Sul,Brazil. The working approach was based on the landscape characteristics identification and the analysis of topography and drainage system. The lithological map presents the types of rocks found in the hydrographic basin and the main structural control, defining five big blocks. The nine morpholitological units were defined through the comparison of landscape and geological substrate where each unit presents different responses to the processes of superficial dynamics.