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 given diagram illustrates the various stages in a hydroelectric

power

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station for generating electronic.

Overall

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, it can be seen that a total of stages are involved in the whole procedure, starting with reserving river

water

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behind Dam, followed by the flow of

water

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to the

power

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station and

finally

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, producing electricity and transmitting them to National Grid. To being with, there is a dam in the path of the river which leads to the high-level

reservoir

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and its intake flows to generate electricity during the day.

Whereas

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,

this

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exit is closed at night. Afterwards, in the daytime,

water

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is transmitted to reversible turbines and it is turned to an operator for the generator. (Meanwhile,

water

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goes to the low-level

reservoir

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.)

Finally

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, the

power

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which is produced by the generator provides national electricity with

power

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lines.

By contrast

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, at night,

water

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which comes from the low-level

reservoir

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drives the turbines and

then

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, is pumped to the high-level

reservoir

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to reuse.