Analysis of the Spatio-temporal Dynamics of Nitrogen, Carbon Compounds and Indicators of Oxidability in the Natural Waters of the Ob Swamp

Abstract

The purpose is to analyze the spatio–temporal changes in physical and chemical parameters associated with the migration of organic matter in the waters of the Ob swamp. Materials and methods. The research methodology included the generalization and analysis of data obtained from 2002 to 2021, including spatio-temporal changes in the concentration of biophilic elements and indicators associated with the migration of organic matter. Results and discussion. In the course of research, it was found that the waters of the Ob swamp can be characterized as slightly alkaline or neutral, with an increased content of carbonates, hydrocarbonates and ammonium nitrogen, compared with oligotrophic swamps. According to the general chemical composition, the waters of the anthropogenic disturbed area are characterized as brackish, sodium bicarbonate. The waters of the background area are fresh, calcium bicarbonate, with increased total mineralization. The trends of changes in physical and chemical parameters in space and time are revealed. The regularities of changes in the redox situation in swamp waters have been studied. Conclusion. Оver the past decades there have been no significant changes in the macro-component composition of the waters of the Ob swamp in various areas, which indicates the high ability of the swamp to maintain a stable ecological and geochemical state, however, the dynamics of the macro-component composition and pH of the waters of the anthropogenically disturbed area they indicate the gradual spread of the pollution front, expressed in an increase in the total mineralization of water and an increase in pH values.