Proposição de checklist para avaliação de risco de movimento de massa nas falésias na Praia de Morro Branco - CE

Abstract

The cliffs are part of the coastal zone present in various parts of the world, being formed by different stratigraphies. This type of formation naturally suffers wear, either by the action of the sea, wind or even rain, with its degradation intensified due to disorderly occupation. Its use takes place in different ways, for example, some are conservation areas, others have residences and/or beach huts, and they also serve as access to the beach by pedestrians or vehicles. The cliffs are geological formations that attract hundreds of tourists due to their natural beauty. In recent years, the occurrence of several accidents due to earth moving on the cliffs has become quite evident in the media, being the main motivation of this research. In order to contribute to the prevention of recurrence of accidents, this study proposes to carry out a checklist to assess the risk of mass movement on the cliffs. Therefore, a research was carried out in the literature on the cliffs and then Praia de Morro Branco - CE was chosen as the study site. In view of this, geotechnical data of the cliffs were analyzed, which indicated that the soil of the region is a poorly graded silty sand and it was identified that the slopes of the cliffs can be considered unstable. For the proposal of the checklist, previous studies were taken into account, this tool being used in several areas, and checklists developed by government institutions. In the research, a field visit was carried out, seeking to make photographic records and identify existing problems on the cliffs. The checklist created resulted in a worksheet to be filled in by a responsible technician, divided into topics in order to standardize the inspection and help in the identification of the risk of mass movement on the cliffs, identifying the need for an intervention.