The diagram below shows how electricity is generated in hudroelectric power station. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

The diagram illustrates the

process

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of

electricity

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production in a hydroelectric

power

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station

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. The

process

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begins when the

water

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flows

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from the

river

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to the high-level

reservoir

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, and it ends with the transmission of

electricity

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to the national grid.

Overall

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, what stands out from the diagram is that the

process

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is broadly distributed into

day

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and

night

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stages, with a daylight stage involving

electricity

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production from the

river

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and storage of

water

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in the

reservoir

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. At

night

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, the

water

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flows

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back in the opposite direction towards an initial

reservoir

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and the

river

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. The

day

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stage of the

process

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involves

channeling

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channelling

show examples

the

river

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water

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into a high-level

reservoir

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backed up by a dam. There is an intake area leading to the

power

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station

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that opens during the

day

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and closes at

night

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.

Water

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flows

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during the

day

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to generate

electricity

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through the

power

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station

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turbines. The generated

electricity

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is

then

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sent to a national grid through

power

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lines

while

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the excess

water

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runs to a low-level

reservoir

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. During the

night

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stage, the

water

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stored in the low-level

reservoir

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is reverted to the

power

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station

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, and the turbines of the generator pump it back into the high-level

reservoir

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, which is closed during the

night

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. The

river

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water

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is stored at the upper level, and later, it

flows

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down, starting the cycle again.