Abstract
The article gives the results of studies of the hydroecological characteristics (water temperature, dissolved oxygen, chemical characteristics, production, methane concentration and emission, and the abundance of phytoplankton and benthos) in the Ivankovo Reservoir in August 2020–2021. Data of integrated surveys were used to show that the specific weather conditions and flowage have led to difference in these closely interrelated characteristics. The hot weather and the low flowage in 2021 contributed to an increase in oxygen consumption by bed soil, intensification of exchange processes at the water–bottom sediment interface, an increase in mineral phosphorus flux, more active blooming of the water body, decay of dead organic matter at higher temperature of the bottom layer. The role of bioturbation in changes in the rate of exchange processes between bottom water layer and sediments is demonstrated. The changes in the combination of processes in the water body caused an increase in methane flux into the atmosphere in 2021 compared with the previous year.
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Funding
The field and laboratory studies were carried out under subject “Studying Geoenvironmental Processes in Hydrological Continental Systems, Quality Formation of Surface Water and Groundwater, Problems of Water Resources Management and Water Use under the Conditions of Climate Changes and Anthropogenic Impact” (FMWZ-2022-0002). Methane emission and concentration were studied under subject “Analysis, Simulation, and Forecasting of Changes in Hydrological Systems, Water Resources, and Continental Water Quality ” (121051400038-1).
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Grechushnikova, M.G., Lomova, D.V., Lomov, V.A. et al. Space and Time Variations of Hydroenvironmental Characteristics of the Ivankovo Reservoir in Years with Different Weather Conditions. Water Resour 50, 109–116 (2023). https://doi.org/10.1134/S0097807823010074
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DOI: https://doi.org/10.1134/S0097807823010074