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The image illustrates a hydroelectric power station diagram, where a river flows into a high-level reservoir through a dam. An intake is open during the day and closed at night, regulating the flow of water to reversible turbines. In the daytime, the turbines operate a generator to produce electricity, which then flows through power lines to the national grid. At night, water is pumped back into the high-level reservoir. The power station is depicted as a building housing the generator and turbines, with an arrow indicating the flow of water during the day (downwards) and night (upwards) between the high and low-level reservoirs.
Given the complexity of the image, the above description may not be entirely accurate.
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The diagram depict the process of creating electricity in a hydroelectric power station.
Overall, there are two different flows of water in the daytime and at night. During the day, water flows from high-level reservoirs to low-level reservoirs. By contrast, the flow of water at night is from low-level reservoirs to high-level reservoirs.
In the daytime, intakes are opened for water from high-level reservoirs go through to generate electricity. Then, the water arrive in power stations, generators create energy with it, then power lines deliver that electricity to the national grid. Finally, the water goes through reversible turbines into low-level reservoirs.
At night, the water from low-level reservoirs go through the reversible turbines and is pumped into high-level reservoirs. The flow of water during pumping contrasts with the flow of water to generate electricity. However, at night, the intakes are closed.
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