APLICAÇÃO DA ANÁLISE MORFOMÉTRICA DE BACIAS HIDROGRÁFICAS COMO SUBSÍDIO AO ENTENDIMENTO DOS PROCESSOS CRESCENTES DE INUNDAÇÕES NA MALHA URBANA DA CIDADE DE UBÁ-MG

Abstract

Morphometric analyzes are important methodological tools in the interpretation of the hydrological behavior and geomorphological dynamics of a watershed. This assertion gains importance, from the moment that the flooding phenomena comprise one of the main environmental problems in Latin America and Brazil. In this sense, the objective of the present study is to evaluate comparatively, based on linear, zonal and hypsometric characteristics, the morphometry of eleven contribution sub-basins of Ribeirão Ubá, in order to apprehend qualitative aspects that allow the understanding of factors intrinsic to the floods in the city of Ubá-MG. To carry out the morphometric analysis, a cartographic base was created, consisting of vector and matrix files; they were managed, managed and treated using ArcGIS 10.1 Software. Subsequently, a qualitative integration of the results was performed, indicating the sub-basins of Ribeirão Ubá that present morphological characteristics more conducive to flooding. In this sense, three sub-basins were categorized as having high geomorphological susceptibility to flooding, and should receive special attention. They were named as sub-basins 5,6 and 7, with characteristics of high declivity, high altimetric amplitude and significant number of first order channels