The illustration portrays the step-by-step process at which the electricity is created in a hydroelectric power station. Overall, it is evident that water flows from and to the high-level reservoir throughout the day.
First, the river water is stored the high-level reservoir by a dam during the night and it is released in the day. Then, the released supply of water flows through the tubes that connect the turbines and dam, the flow is lead to the turbines. The turbines spin manufacturing current with the help of the generator, and the water is sent to the low-level reservoir. After that, the current is passed to the power grid and then to the national grid.
However, in the night, the process is reversed, in which the water from low-level reservoir is pumped upwards by the turbines. The turbines direct the water from bottom to the high-level reservoir, in which it is stored from the next day’s electricity production.