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Abstract(s)
Alguns dos efeitos da Revolução Industrial do século XVIII como, o êxodo rural e o consequente aumento dos processos de urbanização, causaram um desequilíbrio territorial entre o balanço biofísico, o que trouxe consequências urbanísticas para as cidades. A necessidade de mitigação dessas implicações depende de um planeamento urbano sustentável, que considere a integração funcional da infraestrutura urbana com os serviços ecossistémicos prestados pelos espaços verdes. É a partir disso que o conceito de corredores ecológicos se faz necessário, como meio de devolver parte da ligação perdida pelos processos de expansão territorial. Logo, o objetivo deste trabalho consistiu em inventariar os espaços verdes da cidade de Bragança e as suas zonas periféricas, de modo a avaliar a conectividade entre a estrutura verde principal e as áreas adjacentes e permitir a definição de novas espaços verdes com vista à potenciação de corredores ecológicos. Por meio do uso das técnicas de sensoriamento remoto aplicadas ao software QGIS e os seus complementos, foi possível dimensionar os corredores ecológicos para a biodiversidade, a partir da seleção de áreas potenciais para incrementação das áreas verdes e consequente mitigação dos efeitos da fragmentação. O estudo demonstrou que há 12 hectares degradados as margens dos cursos de água que podem ser recuperados, bem como há a possibilidade de interligar os principais fragmentos verdes por meio da inclusão de 262 hectares estrategicamente distribuídos ao longo da área localizada no perímetro urbano de Bragança, o que representaria um aumento de 55,2% quando comparado a parcela de áreas verdes atualmente existentes.
Some of the effects of the 18th century Industrial Revolution, such as the rural exodus and the consequent increase in urbanization processes, caused a territorial imbalance between the biophysical balance, which brought urban consequences for cities. The need to mitigate these implications depends on sustainable urban planning, to consider the functional integration of urban infrastructure with the ecosystem services provided by green spaces. It is from this that the concept of ecological corridors is necessary, as a means of returning part of the connectivity lost by the territorial expansion processes. Therefore, the objective of this work was to inventory the green spaces of the city of Bragança and its peripheral areas, to assess the connectivity between the main green structure and adjacent areas, and allow the definition of new green areas with a view to the potentiation of ecological corridors. Using remote sensing techniques applied to QGIS software and its complements, it was possible to scale the ecological corridors for biodiversity, from the selection of potential areas to increase green areas and consequently mitigate the effects of fragmentation. The study showed that 12 degraded hectares of the banks of the watercourses can be recovered, as well as that there is the possibility of interconnecting the main green fragments through the inclusion of 262 hectares, strategically distributed along the area located within the urban perimeter of Bragança, which would represent an increase of 55.2% when compared to the share of green areas currently existing.
Some of the effects of the 18th century Industrial Revolution, such as the rural exodus and the consequent increase in urbanization processes, caused a territorial imbalance between the biophysical balance, which brought urban consequences for cities. The need to mitigate these implications depends on sustainable urban planning, to consider the functional integration of urban infrastructure with the ecosystem services provided by green spaces. It is from this that the concept of ecological corridors is necessary, as a means of returning part of the connectivity lost by the territorial expansion processes. Therefore, the objective of this work was to inventory the green spaces of the city of Bragança and its peripheral areas, to assess the connectivity between the main green structure and adjacent areas, and allow the definition of new green areas with a view to the potentiation of ecological corridors. Using remote sensing techniques applied to QGIS software and its complements, it was possible to scale the ecological corridors for biodiversity, from the selection of potential areas to increase green areas and consequently mitigate the effects of fragmentation. The study showed that 12 degraded hectares of the banks of the watercourses can be recovered, as well as that there is the possibility of interconnecting the main green fragments through the inclusion of 262 hectares, strategically distributed along the area located within the urban perimeter of Bragança, which would represent an increase of 55.2% when compared to the share of green areas currently existing.
Description
Keywords
Biodiversidade Ecologia Fragmentação Geoprocessamento Urbanização