Redução de perdas reais em sistema de abastecimento de água através da aplicação de modelagem hidráulica, criação e gestão de distritos de medição e controle: case de Formoso do Araguaia

Abstract

The supply system scenario in Brazil faces problems, mainly in relation to water losses, which generate economic, technical, social and environmental impacts. In search of alternatives to change this reality, the research used hydraulic modeling and the creation of macro-metering and control districts (DMC) to reduce real water losses in the city of Formoso do Araguaia/TO, a municipality with above-average rates national. To this end, the city's supply and asset networks were updated, the hydraulic model was created, and areas were sectored and macro- metering and control districts were created. Continuous monitoring of the DMCs and geophoning of the areas being carried out. Between the month of March, the beginning of the project's application, and the month of November, the last month of monitoring, there was a 41% reduction in the minimum night flow. The Research Factor (FP) also reduced around 39%, from a global average of 0.44 in March to 0.27 in November. In the last month of the project, a 5% reduction in the distribution loss rate can be seen, going from an average of 43% in 2019 to 38% in 2020, during the same period. Furthermore, after September, the IPD remained under control at 34%. The volume of losses presented a reduction of 14,614 m³ if compared to the scenario without the execution of the project, bringing an avoided cost of more than R$ 90,315.00 in just the first 9 months of the project. The performance of step-tests before the geophoning execution allowed an efficiency gain of 110%, increasing the number of leaks found per hour, enabling the reduction of costs and time to locate the leaks. With regard to economic viability, a payback of 12.9 months was presented.