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

The diagram illustrates the procedure of producing electricity by one

renwable

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renewable

source of energy. It is evident that operations held

at

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during

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daytime

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the daytime

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and during

night

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the night

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are different. The first step during the day is when

water

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from a river fills the High-level

reservoir

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.

Following

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this

Linking Words

step

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step,

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the

water

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flows to the Power station to generate electricity, where it operates a

generator

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and either

then

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lifts up to the Power lines and the National grid or to

fulfill

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fulfil

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the Low-level

reservoir

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.

In contrast

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, at night the High-level

reservoir

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is closed by means of the Dam and the

water

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is being pumped by the

Generator

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. After the

water

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leaves the Low-level

reservoir

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, it flows in pipes

though

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through

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the

generator

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and

finally

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to the bigger

reservoir

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.

Overall

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, a Hydroelectric power station produces energy and electricity

via

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by

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pumping

water

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from the river by the

Generator

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. The process varies depending on the time of the day.