Assessment of Cyclic and Asynchronous River Flow Patterns of the Angara – Yenisei and Volga – Kama Cascades as a Condition for a Possible HHP Operation Using a Compensated Energy Generation Mode

The assessment of cyclic river flow fluctuations of the Angara – Yenisei and Volga – Kama cascades was performed to reveal the streamflow variation patterns of the Angara, Yenisei, Volga, and Kama rivers, which can be further used to optimize the operating conditions of the hydroelectric power plants located within these cascades.