CORRELATION ANALYSIS OF THE INFLUENCE OF CLIMATIC AND BIOLOGICAL FACTORS ON HYDROCHEMICAL INDICATORS OF THE GENERAL ECOLOGICAL CONDITION OF THE TRUBIZH RIVER

Abstract

The article deals with the issue of correlation analysis of the influence of external factors on the hydrochemical composition of the Trubizh River in the conditions of an urbanised environment within the city of Pereyaslav. The aim of the study is to investigate the correlation between climatic and biological factors in order to identify the key factors determining the variation component of hydrochemical parameters. An integrated approach to the analysis was implemented, which included the use of a number of analytical methods and quantitative analysis. The following methods were used to assess the quality of the surface water of the Trubizh River: Winkler’s iodometric titration to quantify the dissolved oxygen content, Kubel’s permanganate oxidation to analyse the concentration of organic compounds, Mohr’s argentometry to determine the level of chloride ions, complexometric titration to assess the total hardness of the water, acid-base titration to analyse the temporary hardness and total acidity, and a qualitative method to determine the concentration of iron. These methods provided comprehensive information on the chemical composition and water quality of the Trubizh River. The analysis of the surface water of the Trubizh River has provided new scientific results that significantly expand the existing knowledge in the field of environmental monitoring of water resources, providing up-to-date data on changes in the chemical composition of the water, which requires measures to optimise the impact of agricultural practices and industrial emissions on the watercourse. It has been found that an increase in the concentration of elements stimulates the active development of phytoplankton, leading to a decrease in the oxygen regime and a deterioration in the conditions for most aquatic organisms. The phenomenon of local “blooming” of the water was recorded, which is an indicator of massive development of phytoplankton on the surface of the reservoir. It was confirmed that the quality of the surface water of the Trubizh River is subject to significant biotic and abiotic factors.