USE OF THE COASTAL MODELING SYSTEM (SMC - BRAZIL) IN THE STUDY OF THE DYNAMICS OF THE COAST OF THE ARACAJU - SERGIPE

• Main Authors: Tais Kalil, José Maria Landim
• Format: Article
• Language: Portuguese
• Published: Programa de Pós-graduação em Geografia (PPGEO) 2017-12-01
• Series: GeoNordeste
• Subjects: erosion; waves;
• Online Access: https://seer.ufs.br/index.php/geonordeste/article/view/7138/pdf
• ISSN: 1518-6059; 2318-2695

The study of the dynamic processes in coastal environments is very important, since these processes determine the evolution of these environments. This work aims to contribute to an assessment of the marine and sedimentary dynamics in the coastal line of the city of Aracaju, through the application of the Coastal Modeling System (SMC), a tool that includes a set of methodologies and numerical models that allow studying the processes and quantify the variations that the coast suffers as a consequence of natural events and / or human interference. The methodological procedure consisted in the propagation of waves, currents and sediment transport using the MOPLA module of the SMC. Two main wave systems, from east-southeast (ESE) and Southeast (SE), operate in the area investigated. The most frequent waves are those with significant height between 1.0 and 1.5 m, and peak period around 5 and 8 s in 30.84% of the cases. In most of the coastline, the mean positive mean transport Northeast-Southwest (NE-SW) and Southwest-Northeast negative (SW-NE) are approximately equivalent, with a small liquid transport oriented from NE to SW. Divergences in the direction of net transport were verified in Refúgio-Mosqueiro and Coroa do Meio beaches. These are, therefore, the two stretches that present the greatest vulnerability to a possible increase in the frequency of extreme events and rise at sea level. The results obtained will allow a better planning of the occupation of the coastline of the city of Aracaju.