Este estudo avaliou a viabilidade do aproveitamento da água das chuvas no Tanque de Provas, utilizado em ensaios de modelos reduzidos de embarcações da Faculdade de Tecnologia de Jahu -Fatec Jahu, SP. O trabalho considerou os dados pluviométricos locais, a área de cobertura para captação e a demanda de água. Foi estimada a necessidade de água no processo de limpeza por filtragem, lavagem e evaporação do Tanque de Provas. O dimensionamento do reservatório foi calculado conforme as metodologias descritas na NBR 15527, que determina os requisitos para o aproveitamento de coberturas em áreas urbanas para fins não potáveis. O volume do reservatório selecionado como a melhor alternativa após as análises comparativas considerou as restrições locais e o risco de não atendimento, permitiu o máximo aproveitamento da água pluvial e resultou na maior redução possível da demanda de água potável do sistema de abastecimento público.Palavras-chave: captação de água pluvial, não potável, índice pluviométrico. Use of rooftop rainwater of buildings: reservoir volume estimation by methods described in the NBR 15527 ABSTRACTThis paper explores the possibility of harvesting rainwater in a Testing Tank used to test scale models of boats and ships in Jahu College of Technology, São Paulo State. We considered local rainfall data, the coverage area for catchment and the demand for water. Water demand was estimated for cleaning, filtering and evaporation processes in the Testing Tank. The dimensions of the reservoir were calculated according to the methodologies described in the NBR 15527, which prescribes the requirements for the use of roofs in urban areas for the catchment of rainwater for non-potable purposes. The volume of the reservoir selected enabled the best use of rainwater and resulted in a better reduction of water demand on the public supply system. It was chosen as the best alternative after comparative analysis considering the local restrictions and the risk of non-compliance.
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