Dimensionamento de sistema de aproveitamento de águas pluviais em bloco de água da UFCG – Campus Pombal.

Abstract

Water is essential for living beings and for the environment, but over the years the demand for water is increasing, and since it is an exhaustible natural resource, the need for rational use of water and finding alternative sources to preserve the environment arises, and rainwater harvesting is a viable solution. Educational institutions have great potential for the implementation of rainwater harvesting, because they have a large catchment area, and economically reduce the cost of drinking water. The purpose of this study was to propose a system for rainwater harvesting for non-potable purposes in the "Margarida Pereira da Silva (Block 3)" classroom at the Federal University of Campina Grande, Pombal Campus. It was made a verification of the components of capture already existent in the building and from these new components were dimensioned. Through a survey of the rainfall data of Pombal andthe demand for non-potable water in Block 3 an estimate of the accumulation volume was made using the Rippl Method and the Azevedo Neto Method. Due to the lack of rainfall in some months in the region, the sizing of the accumulation reservoir by the two methods showed high volumes, thus to be technically feasible the implementation of the proposal was considered that the system will meet the demand of 25% of the block's non-potable water, it was adopted for the lower reservoir the volume of 20 m³ and for the upper one 1 m³. With the implementation of a rainwater harvesting system to meet 25% of the non-potable water demand of Block 3, it will be possible to save up to R$ 1000 reais in the UFCG's water bills. Through this study it was possible to verify the potential of rainwater harvesting in Block 3 and that it is feasible to implement the system, as an alternative for the preservation of water resources and reduction of water costs in a university campus.