REGULARITIES AND FACTORS OF FORMATION OF WINTER HYDRO/CHEMICAL REGIME OF THE UGLICH RESERVOIR

The article presents the results of the study of the winter hydro/chemical regime of the Uglich reservoir which is the second stage of the Volga-Kama cascade of reservoirs. In winter period the main influence on the formation of the hydrochemical regime of the Uglich reservoir is exerted by water coming from the Ivankovsk reservoir which located upstream. It was found that water in the reservoir is hydrocarbonate, mineralization varies from 243 to 351 mg per liter, calcium and magnesium concentrations reach 60.9 and 17.5 mg per liter. Concentrations of mineral phosphorus in the reservoir are 0.043–0.076 mg per liter, total gross phosphorus in the upper relief of the Uglich HPP reach 0.138 mg per liter, nitrate concentrations are 0.14–0.84 mg per liter. The main indicators of hydro/chemical regime of the Uglich reservoir have spatio-temporal variability. Its change from year to year, as well as from target to target. Global climate changes have not yet had a significant impact on the winter hydro/chemical regime of the reservoir.