Uso de dados srtm e plataforma sig na caracterização morfométrica da bacia hidrográfica do braço norte do rio são mateus - Brasil

Abstract

The delineation of a watershed and it's morphometric characterization procedures are commonly used in environmental and hydrological analysis. The advent and consolidation of Geographic Information Systems (GIS) and the improvement in the generation of Digital Elevation Models (DEM's) have contributed significantly to the development of automatic methodologies to obtain explanatory variables in a more efficient and reliable manner, ensuring scientific reproducibility. The objective of this study was to generate a Conditioning Hydrographic Digital Elevation Model (CHDEM) for the basin of the northern tributary of the São Mateus River, from the SRTM remote data. Generated the CHDEM for the studied area, we obtained the following morphometric characteristics: drainage area, perimeter, shape of the basin (Kc, Kf), prioritization of water courses, drainage density, density of intersections, an average slope for the basin, average elevation of the basin and slope of the main water course. Space operations of neighborhood and connectivity, implemented in a matrix environment, showed excellent results in obtaining the physical characteristics in a fast, reliable manner and with guaranteed scientific reproducibility.