Português (Brasil)

Resumen

There is an urgent need to expand knowledge about the physical environment in order to establish guidelines for the rational use of coastal areas, predicted by the Intergovernmental Panel on Climate Change (IPCC) by the year 2100. The present research aimed to determine the level of environmental vulnerability of the northern coast of the Municipality of Barra de São Miguel / AL, due to the elevation of the Relative Sea Level, as well as to suggest Non-Edifying Terrestrial Limits (LTNE), for the protection of the landscape and damping of wave energy. Methodological procedures consisted of inferring coastal retrogradation through the Brunn Rule (1962); establish the Coastal Vulnerability Index (CVI) through the analysis of six environmental variables by Gornitz (1991) and Germani et al. (2015); and delimit the LTNE considering the protective guidelines according to BRASIL (1988), Muehe (2001), BRASIL (2004), and Scherer (2013). Regarding the results obtained, the retrogradation, even in an optimistic scenario and despite presenting a high level of environmental conservation, showed a decrease of 9.12m. The LTNE limits the previous limit of 200 meters can be adopted in the future as a reference value to absorb the future impacts generated by the marine elevation. As for the CVI, the region was classified as highly vulnerable to the action of erosion processes, either by removing sediments or by retrograding the coast. Thus, it can be inferred that the results obtained are important for understanding the coastal environment of the Municipality of Barra de São Miguel / AL, and can be used as a guiding source in the monitoring and management of coastal regions of Alagoas.