Risco de escorregamentos na bacia hidrográfica do Ribeirão Caieiro em Barbacena/MG

Abstract

The environmental analyses aimed at investigation and prediction of mass movement in urban areas assist in risk management, contributing to decision making and also in meeting the standards established by federal, state and municipal laws regarding construction in places where these previous studies would serve as a support for the creation and implementation of urban planning. Caieiro and Rio das Mortes Rivers, a tributary of Rio Grande, are the main watercourses in the municipality of Barbacena, Minas Gerais. Caieiro Creek is a state watercourse with approximately 27 km in length, from its headwaters in the Mantiqueira Mountains to its mouth in Rio das Mortes and its hydrographic basin with an area of 135.7 km². In this sense, the objective was to create the mapping of the landslide risk areas in the Ribeirão Caieiro basin in Barbacena through the weighted superposition between the land use and occupation mapping and the modeling of susceptibility to mass movement, using SINMAP with the ARCGIS software. The data survey for the execution of the work was performed using Google Earth Pro and Alos Palsar images. The SINMAP modeling pointed out the areas of greatest susceptibility. The integration between the aforementioned maps presented the spatialization of the areas of greatest risk for the occurrence of landslides on the population and/or enterprises. It is concluded that the areas of greatest risk may undergo changes, since the model validation occurs in areas that present themselves as unstable due to their slope and urban expansion over these areas can generate new sites with high risk to life or material damage.