two functional wheels not directly but via a pair of cog wheels. This allows individual variation of speeds, diameters, and water levels.

Unlike the water wheels found in watermills, a noria does not provide mechanical power to any other process. A few historical norias were hybrids, consisting of waterwheels assisted secondarily by animal power. There is at least one known instance where a noria feeds seawater into a saltern.

History

Paddle-driven water-lifting

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