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. Write at least 150 words.

The

process

of producing

electricity

from

water

behind a

dam

is depicted in the diagram.

Overall

, in

this

process

potential

energy

of

water

transforms into kinetic

energy

and turns into

electricity

. As is shown in the diagram, the

process

is quite simple, on the one hand, a high-level

dam

stores

water

,

then

in the

electricity

peak consumption periods, during day time,

water

travels from

this

dam

to a low-level reservoir and

due to

losing altitude the

water

's potential

energy

transforms into kinetic

energy

, and

water

with a great amount of kinetic

energy

hits the blades of the turbine and makes it rotate and because of

this

rotation the generator delivers

electricity

to National grid.

On the other hand

, the amount of

water

is not unlimited, to solve

this

problem when the

electricity

peak consumption periods, generally during night time, is passed, the

process

reverses and the turbine acts as a pump and uses the grid

electricity

to send low potential

water

to

high-level

Add an article

the high-level

show examples

dam

to reuse the

water

in peak time.