Inundações e alagamentos em Teófilo Otoni, Minas Gerais, Brasil, segundo indicadores geomorfológicos

Abstract

Floods are frequent in Brazilian cities, not only because of the country's climatic characteristics, but also because of changes promoted by urban expansion, commonly unaccompaniedby effective planning and policies for land occupation and use. In Teófilo Otoni, Minas Gerais, they cause economic and social damage to the municipality, aggravating the increase in their frequency in recent decades. In order to present a map of the susceptibility to flooding and flooding in the city. From the assessment of conditioning factors, this research was based on fieldwork, analysis of remote sensing products and evaluation of data obtained from public security agencies, identifying areas with different degrees of danger. It was observed that floods are related to changes in the hydrological behavior of the main watercourse that drains the municipality, resulting from disorderly occupation. Floods also result from direct changes in the channel andriver plains. Flooding occurs predominantly in convergent features of the model, which also experienced waterproofing of the slopes and valley bottoms, often accompaniedby underground channeling of watercourses. Deficiencies in planning are practices that occurred in the past and are repeated in the present, configuring a model for the continued production of danger in the city.