ASSESSMENT OF THE STATE OF WATER QUALITY DUE TO EUTROPHICATION CONDITIONS (ON THE EXAMPLE OF THE SERET RIVER, UKRAINE)

The ecological state of the Seret River was assessed by studying the physicochemical parameters of the river reservoir (the content of dissolved oxygen, water temperature), biogenic substances (phosphorus compounds) and comparing them with the literature data on the development of phytoplankton, in particular, blue-green algae. It is analyzed that an increase in the concentration of phosphorus in the reservoir contributes to an increase in the biomass of phytoplankton, and with a decrease in the content of phosphates, the number of phytoplankton decreases, which may be a consequence of an increased anthropogenic impact on the reservoir. The development of eutrophication processes in the Seret River was established, which can be prevented by a decrease in the flow of pollutants into the river and compliance with sanitary rules at the water intake.