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 diagram provides information about generating energy by hydroelectricity in a river.

Overall

Linking Words

, the processes of

this

Linking Words

figure are cyclic,

furthermore

Linking Words

, they are shown both

in

Change preposition

during

show examples

the day and at night. In the mornings, intake is opened to the river, which is a high-level reservoir,

then

Linking Words

flows under the dam. It is transferred downward to generate electricity through the tube. When the water goes across the reversible turbines to reach a low-level reservoir, it is used to operate the generator, namely a power station.

Thus

Linking Words

, the power lines help to export the electricity to the national grid. In terms of the nights, the water is not allowed to flow into the low-level reservoir, directly pumped into the high-level by the reversible turbines.

Consequently

Linking Words

, it is flown back to the river by going up the tube.

In addition

Linking Words

to these stages, the intake is not confirmed to be open at night.