Análise da erosão costeira e estruturas de proteção nas praias urbanas do litoral sul de Maceió - AL

Abstract

The present work portrays the analysis of data obtained from the beaches of the South Coast of Maceió, Alagoas, proposing to analyze the level of beach erosion through the existing containment structures. The three beaches studied were Pontal da Barra, Sobral and Avenida, in which containment structures were found only in Pontal. The aim is to know the levels of coastal erosion, classify the degree of erosion in these areas and identify the types of coastal protection structures. One of the methodologies used was the geoindicators, which subsidized the identification of erosion levels. Three types of distinct structures were found, including rockfill, bagwall and retaining wall. Praia da Avenida is the most densely urbanized area, located close to the center of the city, without any type of containment structure, but contains caves, channels and many effluents; areas partially with the presence of vegetation, leading to being classified based on the geoindicators with erosion level II to III, with processes of low intensity to moderate. Praia do Sobral, is a residential area and special preservation zone, containing no marks of construction remains and the like, with low level II coastal erosion detailing, which confirms the no need for containment structures on site. Pontal da Barra, is located in a high-density residential area, almost entirely occupied by an industrial zone, an area of tourist interest. therefore, it is a level IV geoindicator of advanced processes, evidence of advanced processes of coastal erosion. Based on these indices, it is clear that Pontal needs a more careful look with regard to the results obtained from coastal erosion levels. Also leading to understanding the importance of works aimed at this line of research that contributes to the understanding of the advancement of these levels. Thus, these methodological procedures make it possible to manage the use and occupation of coastal environments.