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A poluição ambiental é um dos maiores problemas com que as grandes cidades se confrontam atualmente. Este é também um problema da cidade de Lisboa e ao longo dos anos foram sendo implementadas medidas para reduzir as emissões de poluentes atmosféricos. Neste trabalho pretende-se apresentar um estudo estatístico sobre os principais poluentes atmosféricos existentes na zona da Avenida da Liberdade, nomeadamente, o monóxido de carbono, o dióxido de azoto e as partículas finas de matéria em suspensão com diâmetro aerodinâmico inferior a 10 micrómetros. Foram usados dados recolhidos na estação de monitorização da qualidade do ar situada nesse local. Tentou-se, ainda, avaliar o impacto ambiental associado à construção do túnel do Marquês de Pombal, quer na poluição provocada pelas obras de construção/ampliação, quer nas mudanças no tráfego automóvel provocadas pela sua implementação, focando-nos na qualidade do ar. A análise comparou o nível de poluição dos três poluentes em seis períodos diferentes, considerando-se um período anterior à construção do túnel, períodos associados às várias obras realizadas, um período após a finalização das obras e, por fim, o período associado ao confinamento devido à pandemia provocada pelo vírus SARS-CoV-2.
Abstract The Environmental pollution is one of the biggest problems that large cities are facing today. This is also a problem in the Lisbon city, and over the years, measures have been implemented to reduce air pollutant emissions. In this paper, we present a statistical study of the main air pollutants in the Avenida da Liberdade area, like carbon monoxide, nitrogen monoxide, and fine matter particles suspended with an aerodynamic diameter of less than 10 micrometers. The data collected of the air quality was monitorized by the station located in that place. We also attempted to assess the environmental impact associated with the construction of the Marquês Tunnel, both in terms of pollution caused by the construction/expansion works and in the changes in vehicle traffic, resulting from its implementation, with a focus on air quality. The analysis compared the pollution levels of the three pollutants in six different periods, considering a period prior to the construction of the tunnel, periods associated with the various works carried out, a period after the completion of the works and, finally, the period associated with the confinement due to the pandemic caused by the SARS-CoV-2 virus.
Abstract The Environmental pollution is one of the biggest problems that large cities are facing today. This is also a problem in the Lisbon city, and over the years, measures have been implemented to reduce air pollutant emissions. In this paper, we present a statistical study of the main air pollutants in the Avenida da Liberdade area, like carbon monoxide, nitrogen monoxide, and fine matter particles suspended with an aerodynamic diameter of less than 10 micrometers. The data collected of the air quality was monitorized by the station located in that place. We also attempted to assess the environmental impact associated with the construction of the Marquês Tunnel, both in terms of pollution caused by the construction/expansion works and in the changes in vehicle traffic, resulting from its implementation, with a focus on air quality. The analysis compared the pollution levels of the three pollutants in six different periods, considering a period prior to the construction of the tunnel, periods associated with the various works carried out, a period after the completion of the works and, finally, the period associated with the confinement due to the pandemic caused by the SARS-CoV-2 virus.
Descrição
Palavras-chave
Poluição ambiental Monóxido de carbono Dióxido de azoto Partículas finas de matéria em suspensão Estação de monitorização da qualidade do ar ANOVA Teste de Kruskall-Wallis Teste de Nemenyi Análise discriminante linear Environmental pollution Carbon monoxide Nitrogen monoxide Fine matter particles suspended Air quality monitoring station Kruskal-Wallis test Nemenyi test Linear discriminant analysis
