Dissipação de plásticos da plataforma continental interna adjacente a cidade de Fortaleza

Abstract

Plastic production in 1950 was 1.5 million tons, in 2016 jumped to an estimated 335 million tons. These residues in large urban centers can be transported by municipal drainage systems and reach the sea, causing several impacts for the marine ecosystem and also for the economy of coastal cities. Simulate plastic dispersion in Fortaleza - CE, has the goal to understand how plastics launched in the coastal zone int eract with the engineering works present in the west side of the city. To simulate the dispersion, a mapping of the drainage system that throw residue into the sea, was made. The Delft3D program was used to model the particles thrown at the points of drainage and verify their dispersion. It can be observed that in Fortaleza the dispersion occurred in the west direction, the largest accumulations occurred in the windward side of the groyne s, the tidal currents were responsible for accumulating and dispersing the residues between the structures. The place where the largest accumulation took place, in all the simulations, was the groynes of Rua Santa Elisa meeting Rua Boa Esperança . Physical processes occurred due to engineering works that favored dispersal and revealed that there is complexity in the way that environmental components act at specific points on the coast. Thus, it was possible to understand how dispersion of floating plastics occurs in the coastal zone of Fortaleza, how the engineering works on the coast influence thedispersion and also identify areas of accumulation.