Análise dos impactos gerados por lançamentos de esgotos domésticos em reservatórios: um estudo de caso no interior do Brasil, Caçu- GO

Abstract

The increasing concern about the hydric resources, specially its quality and availability to future generations, has shown the need of an appropriate hydric management that seeks to ensure aspects of sustainability. This paper analyzes the impacts generated by the sewage discharge into the Barra dos Coqueiros's resevoir, at Caçu - GO, by calculating the organic loads daily, annually and the concentration of sewage discharge of some physico-chemical constituents typical of domestic sewage, like biochemical oxygen demand (BOD), chemical oxygen demand (COD), total suspended solids (TSS), total nitrogen (TN) and total phosphorus (TP). There was no regular system of sewage treatment in Caçu, so it was adopted typical values of removal efficiency for load calculation actually discharged into the reservoir. It was found that the loads of nitrogen and phosphorus discharged probably will not be able to produce an eutrophic environment, mainly due to the dimensions of the reservoir.