AUTOMATED TECHNIQUES FOR INTEGRATED ANALYSIS IN LINEAR EROSIONS OF SUB-BASINS IN THE MUNICIPALITY OF CACEQUI/RS

Abstract

The study area is located in the municipality of Cacequi, which stands out for the high occurrence of gullies in its territory. The geological and morphostructural framework can interfere with the shape, intensity and orientation of the gullies in Cacequi. Thus, this article seeks to analyze the relationship between morphostructural lineaments and relief elements in the occurrence of gullies in the Sanga Areal da Limeira, Sanga da Tapera, Sanga da Vaca Velha and Arroio Areal Grande basins in Cacequi – RS, through the application of techniques automated in MDEs. The automated extraction of morphostructural lineaments produced results consistent with the physiographic characteristics of the area. The orientation of gullies and lineaments coincides in a predominant East – West direction. With the analysis of the relief elements, it is possible to verify the microstructures they constitute, in addition to being possible to identify areas of gully advancement. The morphostructures are related to the valleys and ridges and the gullies are related to the valleys, excavations and slopes. Therefore, it is concluded that the morphostructural control characterized by geological and geomorphological conditions is a condition for the genesis and evolution of the erosion incisions present in the study area.