Avaliação do potencial de uso de água de chuva como medida complementar à demanda de abastecimento no Complexo Aluízio Campos.

Abstract

Population growth has increased the demand for water and has negatively pressured water resources, which in turn have limited reserves both qualitatively and quantitatively. Within this context, it is necessary to adopt measures to develop the rational and sustainable use of these resources. Rainwater harvesting is one of these tools, even for regions with low rainfall, such as the Brazilian semiarid region. Thus, we seek to know the real potential of rainwater use as a complementary measure to the demand for drinking water in the Aluízio Campos Housing Complex, which has the capacity to accommodate 4100 families in the Ligeiro neighborhood, in Campina Grande, PB. For this, simulations were performed in the Netuno program, obtaining not only the potential for saving drinking water, but also the ideal reservoir volumes for single and multi-family buildings. The residences presented higher potential of economy than the buildings, this is related to the occupation factor and the area of interception of the dwellings. Overall, rainwater harvesting is a technology of relevant impact at the study site and can considerably reduce the demand for drinking water from the regularization reservoir that will supply it. It was also found that adding rainwater storage reservoirs to the initial project would not greatly increase the total cost of the work. Thus, the use of rainwater proves to be an effective measure in the management of water demand in new residential clusters, reducing the impacts caused on water bodies used as a source of supply.