AVALIAÇÃO DA QUALIDADE DA ÁGUA DO CÓRREGO BARRO PRETO ANTES, DURANTE E APÓS A FESTA DO DIVINO PAI ETERNO EM TRINDADE-GO

Abstract

With the advent of monitoring technologies and analytical assays, water quality assessment has become an essential tool for supporting decision-making processes, both in public policy and in understanding societal behavior. Despite environmental legislation and recovery programs, many water bodies remain in unknown conditions, especially in urban areas. In this context, this study aimed to evaluate the influence of the Festa do Divino Pai Eterno, held in Trindade, Goiás, on the water quality of the Córrego Barro Preto, establishing a comparison of water quality before, during, and after the event. To this end, a literature review was conducted and three sampling points were defined. Water samples were analyzed for color, turbidity, pH, total phosphorus, dissolved oxygen, ammonia, nitrate, nitrite, electrical conductivity, total dissolved solids, and the presence of coliforms and Escherichia coli, in accordance with the parameters of the Water Quality Index (WQI). Laboratory analyses were carried out in partnership with the sanitation company Saneamento de Goiás (SANEAGO). The results indicated that the water body presents a high level of pollution, with emphasis on the presence of coliforms and total phosphorus above the limits established by Resolution CONAMA No. 357/2005. However, it was observed that the population increase during the festival period had little influence on water quality, which remained practically unchanged, reinforcing the role of daily land use as the predominant factor affecting the obtained indices. Therefore, it is concluded that the degradation of the Córrego Barro Preto is more closely related to continuous urban pressures than to the temporary impacts of the event, highlighting the importance of constant monitoring and the adoption of sustainable practices for urban water resource management.