Ecological Assessment of Quality Composition of Surface Water Body (on the Example of Psel River)

Abstract

It was found that in the Psel River in 2019 there was a decrease in the total phosphate content from checkpoint 1 to checkpoint 6. At the same time, there is a significant increase in the village of Bishkin. The reason may be the placement of a fence post in a settlement where there are no treatment facilities. There is an increase in nitrate content, while in the village of Kaminne and urban-type settlement Velyka Bagachka there is a decrease in nitrate concentrations, which may be associated with their consumption of phytoplankton, which should lead to increased turbidity and biological oxygen demand. The increased concentration of nitrites indicates the intensity of decomposition of organic matter, and the delay of oxidation of NO₂^– to NO₃^–, which clearly indicates the pollution of the reservoir. Nitrates and nitrites enter the water from the effluents of industrial and agricultural enterprises. The decrease in the concentration of ammonium ions (the village of Chervone) is most likely due to their oxidation, dissolved in water by oxygen, with the formation of nitrate ions. There is an increase in chloride content.