The diagrams below show the design for a wave-energy machine and its location. Summarize the information by selecting and reporting the main features and make comparisons where relevant.

The diagram illustrates data about the process of producing electricity in hydroelectric

power

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stations.

Overall

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, the process is cyclical, and it starts when a river flows to a high-level

reservoir

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. The

water

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of the river is stored behind a dam, which has an intake. The entrance is open during the day and it is closed at night. In the daytime, the stored

water

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in the high-level

reservoir

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passes the intake and goes down to the

power

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station, where the reversible

turbines

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are, and it moves them. Having moved by the

water

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,

then

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the

turbines

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operate the generator, and

that is

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when the electricity is produced.

Subsequently

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, the generated

power

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goes into

power

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lines and the national grid. The

water

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that was used to move the

turbines

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flows to a low-level

reservoir

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, and it is held there until night. At night time, the

water

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that was kept in the lower

reservoir

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goes back to the station, where the

turbines

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are. After that,

turbines

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pump it towards the higher

reservoir

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. Having been pumped to the high-level

reservoir

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,

then

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the

water

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is restored in that

,

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apply

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and is ready to be reused.