Análise morfométrica da microbacia do maxixe (Alagoas - Brasil)

Abstract

The study of morphometric parameters in hydrographic basins is extremely important for the identification of possible events that may occur in front of the basin area over time, this study consists of calculating data obtained with the aid of Geographic Information Systems or in a manual to analyze possible problems and solutions for the given area. In view of this, in order to assist in the enrichment of the study, the research aims to characterize through morphometric data whether the area of the Maxixe microbasin has susceptibilities or not to floods and erosion. Along with the elaboration of maps and the calculations carried out through geoprocessing, it was identified that the basin has an area of approximately 330,965 km² and a perimeter of 106,178 km, its format is elongated, which does not favor types of floods and its type of dendritic drainage, the watershed is identified as 4th order according to Strahler's method (1952) with its main river being the Maxixe River, its drainage is 0.64 which is considered regular but very close to poor since below 0.5 it is considered poor, the watershed has an index roughness of 341, which is considered high, thus favoring the surface runoff process and intensifying the erosive processes. Its relief is considered strong undulating and undulating for the most part, thus favoring agriculture in the region. With the morphometric calculations of circularity index, form factor and compactness coefficient, it was possible to identify that the watershed has little probability for floods and floods and with the calculations of drainage density and roughness index it can be concluded that the basin has a regular/poor soil in its drainage density and a high roughness index which favors erosion processes in the region.