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Controlo de afluências indevidas em sistemas de drenagem: estudo de bacia piloto
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Orientador(es)
Resumo(s)
As afluências indevidas têm interferência no desempenho dos sistemas de drenagem de águas residuais domésticas e pluviais, sendo uma causa importante para a deterioração do desempenho funcional dos mesmos e para a ocorrência de descargas de águas residuais domésticas não tratadas para o meio hídrico. Na maioria dos casos desconhece-se a sua real dimensão e localização. As afluências indevidas são um tema com bastante relevância para as entidades gestoras dos sistemas urbanos de água, uma vez que tem impactos muito relevantes, como por exemplo o funcionamento hidráulico, a redução do desempenho ambiental, custos financeiros, entre outros.
Para avaliação das afluências indevidas é necessário um conhecimento detalhado da rede e o diagnóstico dos principais problemas, nomeadamente, quais os tipos de afluências indevidas, qual a magnitude da sua ocorrência e quais os locais onde os impactos são mais relevantes.
A presente dissertação de mestrado consiste em identificar as afluências indevidas existentes numa bacia piloto do município do Barreiro, avaliar a sua magnitude e identificar as zonas de atuação prioritária de forma a reduzir o seu impacto. Para o efeito, foi seguida uma metodologia que se baseia em modelação matemática e avaliação de desempenho.
Rainfall-derived infiltration and inflow (RDII) can interfere with the performance of domestic wastewater drainage and rainwater systems. It is also a major cause for the deterioration of the functional performance of those drainage systems and for the occurrence of untreated discharges of domestic wastewater to the water environment. In most cases, the actual magnitude and location of these inflows are unknown. This issue is quite relevant to the management utilities of urban water systems, since it has very significant impacts such as in hydraulic operation, in the reduction of environmental performance, in financial costs, among others. The assessment of RDII requires a detailed knowledge of the network and a previous diagnosis of its major problems, namely, the type of inflows, the magnitude of their occurrence and the location where impacts are most relevant. The aim of this master thesis was the identification of rainfall-derived infiltration and inflow (RDII) in a pilot basin in the Municipality of Barreiro. It is important to assess its magnitude and identify priority intervention actions in order to reduce its impact. To achieve the thesis objectives, a methodology that relies on hydraulic modelling and performance assessment was followed.
Rainfall-derived infiltration and inflow (RDII) can interfere with the performance of domestic wastewater drainage and rainwater systems. It is also a major cause for the deterioration of the functional performance of those drainage systems and for the occurrence of untreated discharges of domestic wastewater to the water environment. In most cases, the actual magnitude and location of these inflows are unknown. This issue is quite relevant to the management utilities of urban water systems, since it has very significant impacts such as in hydraulic operation, in the reduction of environmental performance, in financial costs, among others. The assessment of RDII requires a detailed knowledge of the network and a previous diagnosis of its major problems, namely, the type of inflows, the magnitude of their occurrence and the location where impacts are most relevant. The aim of this master thesis was the identification of rainfall-derived infiltration and inflow (RDII) in a pilot basin in the Municipality of Barreiro. It is important to assess its magnitude and identify priority intervention actions in order to reduce its impact. To achieve the thesis objectives, a methodology that relies on hydraulic modelling and performance assessment was followed.
Descrição
Mestrado em Engenharia Civil
Área de Especialização: Construção
Palavras-chave
Afluências indevidas Àguas residuais domésticas e pluviais Bacia piloto Sistemas de drenagem de águas SWMM Domestic wastewater and rainwater Pilot basin Rainfall-derived infiltration and inflow Water drainage systems