MORPHOMETRY OF THE FORMIGA RIVER BASIN USING THE ECOLOGICAL-ECONOMIC ZONING OF MINAS GERAIS, BRAZIL

Abstract

Many cities, due to lack of urban planning or other reasons, constantly suffer from floods, so it is necessary to create mechanisms that help prevent these disasters. This work brings the morphometric study of the basin that influences the occurrence of floods in the urban area of the municipality of Formiga, state of Minas Gerais, Brazil, using data from the Ecological-Economic Zoning of Minas Gerais, available on the IDE-Sisema Platform, as the main tool. Geomorphometric data were collected and processed to obtain information such as area, perimeter, axial length, etc. These elements allowed the estimation of indicators of the physical and hydrological behavior of the basin, such as shape factor, drainage network density, among others. The basin has a median propensity for flooding, as shown by the roundness index (Ic = 0.51), shape factor (Ff = 0.52) and elongation ratio (Re = 0.82). This average propensity for flooding in the hydrographic basin analyzed is mainly due to its shape and the waterproofing of the soil by civil constructions on the banks of its main rivers.