Análise da proposta de intervenção para o processo erosivo da falésia do cabo branco, João Pessoa – PB

Abstract

The process of degradation of slopes by marine erosion takes place through a complex mechanism, composed of the actions of rain, wind, man and mainly by the sea. This process takes place throughout the coast of Brazil, including the study site of the related work, Falésia do Cabo Branco. A great debate revolves around this gigantic and very important postcard of the city of João Pessoa – PB, and this work addresses the main causes of its degradation and the main triggering agents of this situation. A bibliographical analysis of the theme is made, in order to describe and characterize the mass movements, together with the characterization of the study area regarding the main observed movements, climate, local vegetation, among others. This document also presents an overview of the various solutions implemented around the world that constitute alternatives to contain marine erosion, such as adherent and non-adherent longitudinal works, transversal works, artificial feeding of beaches and solutions with geosynthetics. In addition, the proposed intervention designed and implemented by the Prefeitura Municipal de João Pessoa was technically described and analyzed, with the support of the knowledge and opinion of some local experts, regarding the solution used and its consequences, also citing the impacts on the sediment transport from Cabo Branco Beach. It is observed that the project and work carried out have negative points, such as the lack of implementation of project elements, such as the fattening of the beach and embankments next to the chosen rockfill. The work ends with suggestions for possible improvements to the executed project, taking into account the knowledge collected and organized during the research. Points such as the replacement of rockfill by the use of geotubes, adoption of the artificial beach feeding mechanism and management of coastal dynamics in the city and neighboring regions are described, in order to predict and observe erosion phenomena and the most vulnerable places.