The diagram below shows how electricity is generated in a hydroelectric power station. Summarise the information by selecting and reporting the main features, and make comparisons where relevant

The given diagram illustrates the various stages in a hydroelectric

power

station for generating electronic.

Overall

, it can be seen that a total of stages are involved in the whole procedure, starting with reserving river

water

behind Dam, followed by the flow of

water

to the

power

station and

finally

, producing electricity and transmitting them to National Grid. To being with, there is a dam in the path of the river which leads to the high-level

reservoir

and its intake flows to generate electricity during the day.

Whereas

,

this

exit is closed at night. Afterwards, in the daytime,

water

is transmitted to reversible turbines and it is turned to an operator for the generator. (Meanwhile,

water

goes to the low-level

reservoir

.)

Finally

, the

power

which is produced by the generator provides national electricity with

power

lines.

By contrast

, at night,

water

which comes from the low-level

reservoir

drives the turbines and

then

, is pumped to the high-level

reservoir

to reuse.