Captação de água de chuva para fins não potáveis na escola técnica estadual Dr. Rubens da Rosa Guedes, Caçapava do Sul – RSCaptação de água de chuva para fins não potáveis na escola técnica estadual Dr. Rubens da Rosa Guedes, Caçapava do Sul – RS

Abstract

Water for human consumption has become increasingly restricted, resulting in major concern today. The situation is attributed to unplanned use, irregular distribution of water in the world, population increase and increasing degradation of water resources, resulting in waste and a possible insufficiency of this indispensable resource for future generations. A simple solution for the preservation of drinking water that is becoming more and more known to society is the use of rainwater, which still has the benefit of reducing runoff, flooding and the demands of sanitation companies. In view of this, considering the sustainable development and conservation of water, an essential natural resource for life, the objective of this work was to verify the technical and economic feasibility of implementing a rainwater harvesting system for use in cleaning and irrigation activities in the region. Dr. Rubens da Rosa Guedes State Technical School, in the city of Caçapava do Sul - RS. To carry out the research, a brief characterization of the area and object of study, the climate of the region about the average temperatures and precipitation, a determination of the total water consumption and an estimate of the non-potable consumption considering the cleaning and irrigation activities of vegetables. It was also made the choice of catchment areas, gutter sizing, conductors and storage reservoirs, calculation of usable rainfall volumes, potential for saving in drinking water, financial savings and payback period by surveying a number of materials needed in project implementation. As a result of the study, it was possible to verify that with the project installed in the adopted collection areas, there will be a saving in drinking water of 36.92m³/ month and 443.04 m³/year and a financial saving of R$ 235.55 per month and R$ 2,826.60 per year. The estimated cost to be spent on project implementation was R$5.742,62, with the return on investment also considering the relatively short financial savings of approximately 2 years. In addition, the rainfall rate of the municipality is very favorable, so the implementation of the project in the school is feasible.