Band 6+: 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 comaprisons where relevant. Write at least 150 words.

The illustration depicts how electricity is produced in a hydroelectric power station.

Overall the intake opens in the daytime through which the water flows into the reversible turbines that operates generator to produce electricity. The leftover water again pumped back to the high-level reservoir in the night.

The water come from a river which is stopped by a dam to fill the high-level reservoir. In day time, the intake opens from which the water flows into the reversible turbines to generate electricity. The water then goes into the low-level reservoir. These turbines operate generator in the daytime that produce electricity. The electricity goes into the power line and then into the national grid.

At night, the water from the low-level reservoir pumped back into the high-level reservoir with the help of reversible turbines. Moreover, the intake is closed at night time.