Caracterização da influência de cargas poluidoras difusas na qualidade da água no córrego Botafogo, Goiânia, Goiás

• Autor(a) principal: Salgado, Aline de Arvelos
• Data de Publicação: 2013
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UFG
• Texto Completo: http://repositorio.bc.ufg.br/tede/handle/tede/3496
• topic: First flush; Poluentes; Escoamento superficial; First flush; Pollutants; Runoff; RECURSOS HIDRICOS::PLANEJAMENTO INTEGRADO DOS RECURSOS HIDRICOS

Accelerated urbanization and disorganized has caused many impacts on the environment, either by modifying the conditions of living and the quality of water resources. The present work aims to characterize the quality and quantity of water and pollutant loads from Botafogo stream, during the dry and rainy, through analysis of quality and quantity, in order to know the behavior of the water quality of the water body and provide impacts of runoff in the water body. During the dry season, nine monitoring were performed in eight sampling points and during the rainy season, only one point was rated 5 rainfall events. Analyses discriminatory (boxplot), cluster and correlation were essential to understand the variations of water quality in dry periods, demonstrating that monitoring in future there is the possibility of reducing the number of sampling points and parameters. It was observed that the parameters COD, BOD5, color, turbidity, coliforms and E.coli showed clear seasonal variation. In the five rain events was evaluated possible to see large fluctuations in concentration during the monitored parameters, especially coliforms and E.coli, suspended solids and turbidity, clearly demonstrating the impact of stormwater drainage on surface water in urban areas, and it is possible to note that many of the parameters showed much higher concentrations than the limits recommended by CONAMA Resolution 357/05, for rivers Class II. It was also found that the BOD5, the COD, turbidity, and total solids best parameters were the first flush indicators. With the results obtained load was observed that the rainfall events are large contributors to the concentration of pollutants in water bodies, since high loads are transported solids and COD. Thus, the results show that the runoff can carry high concentrations of pollutants into the stream Botafogo and this may suffer siltation and eutrophication. Thus, it is demonstrated the urgent need to study the diffuse loads in water bodies, especially in urban areas and assess the measures that can be undertaken in the basin as a preventive, adoption of alternatives for the control and treatment of pollution and mitigation of impacts caused by human actions.