CHANGES IN HYDROGEOCHEMICAL CONDITIONS OF ACADEMICHESKOE UNDERGROUND WATER FIELD DURING EXPLOITATION (TOMSK REGION, TOMSK)

Abstract

The research is relevant due to the need to study the direction and dynamics of the variability of the chemical composition of groundwater used for drinking water supply in a large residential area of Tomsk as a result of the long-term operation of the deposit. Confirmation of previously identified laws and mechanisms leading to changes in hydrogeochemical conditions will make it possible to develop recommendations on optimizing the mode of operation of the water intake, its technical equipment, and improving the water treatment system. The main aim of the work is to evaluate the trends in temporal changes in the concentrations of total iron, sulfate ion, the value of total hardness and pH in natural waters as a result of a long period of operation of the water intake; based on the revealed regularities, propose possible mechanisms for the variability of the hydrogeochemical conditions of a groundwater deposit. Methods: generalization and statistical analysis of the chemical composition of groundwater obtained as a result of long-term regime observations. Results. Analysis of source materials based on the results of a study by water intake services of the concentrations of components and indicators of the chemical composition of groundwater (total iron, sulfate ion, pH, total hardness) of the operated field, presented in the form of long-term observation series, clearly shows that the values of the estimated parameters over the studied period of operation water intake changed significantly and unevenly. Such fluctuations in the dynamics of water composition indicators are explained by the redistribution of the load over the volume of water taken, uneven in time and in production wells of water intake. Nevertheless, the general trends of the main directions of variability, such as a decrease in the content of total iron, an increase in the concentration of sulfate ion, an increase in total hardness, and a decrease in the pH value, established by previous studies, remain the same.

Keywords

• underground water field
• groundwater chemistry
• groundwater monitoring
• hydrogeochemical regime change
• water supply
• academicheskoe field