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As the tide ebbs the water is released through a sluice, which pushes a water wheel, which turns the grinding stones.

For a time, her concept included a water wheel that would draw the water up to the level of the park.

Tang Dynasty monks developed a mechanical clock powered by a water wheel, Hwang says.

We walked along the edge of the furnace dam; several people were fishing on the banks of the hand-dug pond that provided a source of water for the water wheel in times of dry weather.

Residents of a Derbyshire village have constructed a handmade water wheel from two bicycle wheels and washing up bowls to power their Christmas lights.