ANALYSIS OF THE PHYSICO-CHEMICAL CHARACTERISTICS OF JARDIM BOTÂNICO LAKE WATER IN THE CITY OF GOIÂNIA-GO
Keywords:
Surface water, Conservation unit. Physicochemical parameters.Abstract
The research work presents an analysis of the physical and chemical parameters of the water of the Amália Hermano Teixeira Botanic Garden (JBAHT), located in Goiânia-Goiás, being totally inserted in the urban environment, being subject to the anthropic actions. The present study had as objective to present to the analyzes of physical-chemical parameters of the lake water of the JBAHT. Physical-chemical parameters analyzed: water temperature; Turbidity; conductivity; Dissolved oxygen; BOD; COD; PH; Nitrogen and total phosphorus, which were carried out in the laboratory. The sub-superficial collection of water samples was carried out at three different points of the Jardim Botânico lake, covering two similar stages, but at different periods of the year. With the information collected, the analyzes were compared in the rainy and dry periods, and if they obey the rules of the current legislation Art. 3 of CONAMA Resolution nº. 357/2005 regarding the category that this body of surface water is framed. It observed non-compliance with the environmental standard in the parameter total phosphorus, which presents 0.09 mgP/L. This difference can be explained by the location in the park, being subject to natural processes such as the land transportation mainly during the rainy season. During the dry season, total phosphorus levels were higher than those allowed for lentic environments at the three collection points; 0.10 mgP/L; 0.09 mgP/L and 0.07 mgP/L. The presence of phosphorus levels above that allowed throughout the lake can be explained by the presence of anthropogenic actions in the urban environment in which it is found, adding a large amount of this nutrient through pollutants, in addition to the low rainfall index allowing a greater dilution of this body of water.
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