Caracterização da influência de cargas poluidoras difusas na qualidade da água no córrego Botafogo, Goiânia, Goiás
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2013-09-04
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Universidade Federal de Goiás
Resumo
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.
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SALGADO, Aline de Arvelos. Caracterização da influência de cargas poluidoras difusas na qualidade da água no córrego Botafogo, Goiânia, Goiás. 2013. 127 f. Dissertação (Mestrado em Engenharia do Meio Ambiente) - Universidade Federal de Goiás, Goiânia, 2013.