Estudo de áreas suscetíveis a movimentos gravitacionais de massa na porção nordeste do bairro Santo Antônio, Barra do Garças-MT

Abstract

The origin of the occupation process of region of Barra do Garças-MT began in the early twentieth century. The appearance was marked by the extraction of diamonds' on the banks of the Garças and Araguaia rivers. The 1930's began the development plan of the central region and having strengthened its economy, allowed it to quickly become the regional center of the Araguaia valley causing its population to rapidly expand. At this time, there were no public policies for urban planning of peripheral areas and the city, which grew spontaneously so that the buildings were quickly approaching the hillsides of Sierra Azul. Similar action took place in the Saint Anthony Village neighborhood, which was worrysome, given that the spontaneous growth of cities and the occupation of inappropriate areas raising the risk of natural disasters in terms of geological factors. Due to this, it became necessary to assess the current conditions of risk that the population of the northeastern portion of the Santo Antônio Village neighborhood would be exposed. This lead to a quantitative and qualitative research being conducted, tactile visual analysis in the field and in the laboratory and a photographic record and literature review. This research also identified the presence of blocks in the background of numerous residences, as well as steep trees. There were reported episodes of bearing part of the rock mass, especially in periods of high rainfall. The main result was a registration of risk levels being discovered promptly. It was concluded then that the hypothesis that there are locals residing on condition of risk that has been confirmed and that collective and individual prophylactic actions are necessary in order to reduce the risk exposure condition.