Changes in the Regime of River Ice Characteristics of the Votkinsk Reservoir Catchment in 1936–2018

Statistically significant changes in the times of the appearance of stable ice formations and the duration of the freeze-up period were revealed at 12 hydrological gages on the rivers of the Votkinsk Reservoir catchment area for the period 1936–2018. Statistically significant shifts by 7–14 days toward later times were found in the appearance of ice formations along with a decrease in the duration of the freeze-up period by 6–18 days.