Landslides and morphological characterization in the Serra do Mar, Brazil

摘要

The aim of this paper is to demonstrate the influence of the morphological and geological parameters in the occurrence of landslides in the Serra do Mar and verify the influence of March 1967 rainfall event to landslides, that was considered one of the most catastrophic in Brazilian territory. The morphological and geological analysis were carried out, respectively, based on Digital Model Elevation (DEM) obtained from LiDAR data, and by digital map at 1.50.000 scale. A landslide scar map was elaborated based on orthophotos from 1967 and 1973. The results may indicate that there is a connection between landslides scar and some morphological classes, such as the occurrence of these features on concave slope with 30° of inclination. These results and land use map may contribute to identify risk areas, reducing the social and economic damage.