A expansão dos aglomerados subnormais e a ocorrência dos movimentos de massa

Abstract

The occupation of Brazilian urban areas is troubled and has occurred in an accelerated manner, different from efficient and predictable urban planning, from the macro-population point of view. Urban settlements generate social and environmental problems. Without due assistance of public authorities, the population may face some difficulties when dwelling in inappropriate regions. As a result, they start a process of instability of slopes and occupy areas which are informally called hills. This type of natural conformation is seen by geotechnics as natural slopes, which are geological units whose dynamic is variable and where several phenomena occur and may bring environmental risks. In this study, we will discuss the relationship between disordered occupation and the consequences of mass movements. In addition to that, we will examine some causes of susceptibility for the occurrence of environmental phenomena, associated risks and, as an example, we will present the measures adopted by the state of São Paulo in order to prevent the occurrence of natural disasters in areas that are inappropriate for dwelling.

Keywords

• risks. slopes. mass movements.