Evolução da paisagem costeira da Zona de Expansão de Aracaju/SE

• Autor(a) principal: Oliveira, Luana Santos
• Data de Publicação: 2012
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UFS
• Texto Completo: https://ri.ufs.br/handle/riufs/5496
• topic: Unidades de paisagem; Linha de costa; Ocupação antrópica; Landscape units; Shoreline; Anthropic occupation; CNPQ::CIENCIAS HUMANAS::GEOGRAFIA

The coastal landscape of the named area Zona de Expansão (Expansion Zone) located in the city of Aracaju, the capital of the state of Sergipe, in the Northeast of Brazil, can be characterized by its genetic features and, by anthropic and natural dynamics. Thus, this study, based on the landscape analytical category, aimed to analyze the short, medium and long terms evolution of the physical and anthropic structurings. For this, the vectors and axes of occupation, the landscape units and shoreline evolution were analyzed. The method used was based on literature review, field work and, shoreline and landscape units mapping for a range of different time (1965, 1971, 1978, 1986, 2003 and 2008). It was established as occupation vectors: the state policies; the real estate action; the 2nd residences s and; the tourism. Moreover, the occupation axes were determined by the urban infra-structures such as Náufragos´s road, José Sarney´s road and Joel Silveira´s bridge, as well as the installation of urban equipment dedicated to human occupancy and tourism. The landscape units identified were: Marine Terrace, Dune/Interdune, Tidal Plain, Beach/Foredune and Anthropogenic Intervention. The combination of occupation and development variables has directly influenced the landscape which experimented an increasing of occupancy over the natural units, specially from the 1980´s on. Nevertheless, the natural landscape units still predominate in the landscape. Concerning the evolutionary studies of the shoreline, the data obtained from this research show that most of the investigated shoreline has remained relatively stable over the last 40 years. Only short shoreline variations caused by erosion or progradation have been verified. The only exception of the stable status aforementioned was observed in the shoreline of the southernmost section, as well at Vaza-Barris river mouth, where a high variability of sedimentation determined by the ebb-tidal delta dynamics has been found. This study has also verified the formation of a sandy spit on the left margin of the Vaza-Barris river which has influenced the configuration of the shoreline and landscape of that area. Based on the occupancy level verified in the vicinity of the studied shoreline , there are few areas that pose risks to occupation. However, the coastal zone may suffer due to a potential risk related to the population increase. Finally, the result of this study has emphasized the importance of human occupation planning over the natural landscape units as well as the nearby shorelines, in order to avoid potentially irreversible urban and environmental damages.