RELAÇÃO DOS PROCESSOS EROSIVOS LINEARES COM OS ATRIBUTOS DO RELEVO NO MUNICÍPIO DE UNISTALDA - RS / LIST OF EROSION LINEAR WITH ATTRIBUTES OF RELIEF IN MUNICIPALITY UNISTALDA - RS

Abstract

The soil degradation affects large areas in the region West and Midwest of Rio Grande do Sul, where are identified surface features as linear erosion and arenization cores, triggering serious environmental problems. Integrated with this, the work aims, the mapping of linear erosive processes and identify their relationship to the different attributes morphometric of relief in the municipality of Unistalda - RS - Brazil. The methodological procedures were performed in ArcGIS® 10.1 and had the base images optical satellite and RADAR SRTM. Thus, was identified in areas affected by soil erosion as most recurring, elevations below 200 m, with the class of 150-200 m, slopes above 5%, with the class 5-15%, curvature profiles concave, plans curvature converging and forms of the strands concave-converging. Thus, there was satisfactory in this study the use of geoprocessing techniques, integrated with GIS, based on images optical satellite and RADAR SRTM, as validated in the field.