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

The diagram illustrates how a hydroelectric power station efficiently produces electricity. The process occurs at two different times, which involve the day and the

night

process. Generally, operation during the day generates electricity,

while

the

night

focuses on storing

water

in the

reservoir

. The

water

is

initially

sourced from the river,

then

it is stored in the high-level

reservoir

.

Consequently

, the

water

flows passing the dam that only opens during the day. It leads the

water

downwards to the low-level

reservoir

.

Next,

the generator starts towing the

water

actively and generates electricity to be transmitted via power lines to the national grid for public use.

On the other hand

, the

night

process has opposite mechanisms. It begins when the reversible turbines pump the

water

upwards, reverting it to the high-level

reservoir

. Afterwards, it passes the dam that remains closed at

night

, which retains the

water

in the high-lever

reservoir

during the

night

to ensure a sustainable supply of

water

for the next cycles.