Published in Scientific Papers. Series "Journal of Young Scientist", Vol. 2
Written by Bianca Georgiana OLARU
The aim of this writing is to identify the water quality through physico- chemical and biological indicators. Considering this the water state and quality class of the agrement lake “ Miresei” had been analyzed from 2012 to 2013. The investigation had been based on the quantitative and qualitative methods of the phytoplankton, zooplankton and phytobenthos. The main indicators of this study had been the following: the physico- chemical indicators ( the temperature, pH, O2, CBO5, NH4, NO3, NO2, orthophosphates, P and N) and the biological indicators represented by the plankton and phytobentos saprobity index. The writing had been made in the Faculty of Land Reclamation and Environmental Engineering laboratory. The ecological analyses results, led in June 2012, showed that the lake was strongly eutrophic, and as a result the water belonged to the fourth quality class. After the ecological reconstruction from the autumn of 2013 the water quality improved significantly. The physico- chemical and biological analyses made in 2013, placed the lake water in the second quality class.
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