Análise ambiental dos lagos Bolonha e Água preta, Pará, Brasil.

Abstract

Due to intense urban pressure, caused by some neighborhoods in Belém (PA) that surround the Bolonha and Água Preta lakes, the Murucutu hydrographic microbasin has been suffering several significant environmental impacts that can affect the quality of the water supply in the Metropolitan Region of Belém (RMB), these residential neighborhoods that surround the lakes are mostly devoid of basic sanitation, which constitutes a possible source of water contamination. In recent years, it has been noticed that the Lake Bologna water body has been taken over by a type of vegetation that is called macrophyte, the species found in the lake is predominantly water hyacinth (Eichhornia crassipes Solms), which can be used as an indicator of poor quality, and its appearance may be linked both to the dynamics of the physical environment, as well as to the supply of nutrients due to the “disorganized” occupation of the lake shores, causing countless losses to the population that uses this water body. Thus, in this study, the levels of trace elements in surface waters will be quantified, in order to identify areas that have greater accumulation of these metals, pH, turbidity and chloride data of these waters will also be obtained. The influence of seasonality on the distribution of elements, pH, turbidity and chloride will be verified, which will be referenced with CONAMA resolution 357/2005.