2022-11-082022-11-082012-11-10SCALIZE, Paulo Sérgio; LEITE, Wellington Cyro de Almeida. Avaliação da contribuição de vazamentos de água no sistema de esgoto. Revista Eletrônica de Engenharia Civil, Goiânia, v. 5, n. 2, 2012. Disponível em: https://revistas.ufg.br/reec/article/view/20956. Acesso em: 4 nov. 2022.2179‐0612  http://repositorio.bc.ufg.br/handle/ri/21583This study evaluated the contribution, at sewerage system, of water from leaks in a city of approximately 200,000 inhabitants, in the state of São Paulo. During the study, teams localized and repaired water leaks in a pipeline with 4,271 water connections by using listening rods, electronic geophone, drill rods and probes. 99 leaks were detected, being 3 in networks stations, 83 in extensions and 13 in easel records. Except the last ones, all the others leaks were no visible leaks (VNV) which infiltrated the sewer system. After its location and repair works, the volume of distributed water decrease from 3,500 m³/day to 2,680 m³/day, reflecting a reduction in nighttime minimum flow (from 15.0 to 2.5 L/s) and maximum flow rate (90 L/s to less than 60L/s). Reflections over the sewer system could be observed by decrease in electricity consumption for the sewage pumping system of pumping’s station of this sector. The observed decrease is related to the water from VNV’s which infiltrated the sewer system, contributing to a longer operation of booster pumps. After repairing of the VNV, the electricity consumption had an average reduction of 44.0 to 30.3 kwh/day, ie 31.05%. The reduction of sewage influent to the Wastewater Treatments Plant could be checked in as a whole,  where the average flow decreased to 457.14 L/s in 2005 to 402.75 L/s in 2006, representing a reduction of 11, 90%, or less than 1,707,993 m³/year sewer. This is due to the intensification of research VNV across the city, where about 1,200 leaks were detected in 2006.porAcesso AbertoVazamento não visívelPerdas de águaVazão mínima noturnaLeak not visibleLossesNight minimum streamflowArtigohttps://doi.org/10.5216/reec.v5i2.20956