Hydrochemical analysis of surface water parameters dynamics in the Rika and Tereblia river (Ukraine)

Abstract

This study assesses the hydrochemical dynamics of the Rika and Tereblia Rivers in Ukraine to evaluate water quality trends. Key water quality parameters, including biological oxygen demand, dissolved oxygen, total suspended solids, ammonium, nitrate, nitrite, phosphate, and sulphate, were analysed over a 10-year monitoring period. Statistical tools, such as Pearson correlation and regression analysis, were applied to determine relationships among these parameters and identify pollution sources. Results show that nutrient loading from agricultural activities, natural processes, erosion, and occasional industrial discharge contribute to water quality variability, impacting dissolved oxygen levels and increasing the risk of eutrophication. The results underscore the need for integrated water management practices to mitigate nutrient and organic matter influx and maintain the ecological health of these river systems.