What type of mechanism did Leonardo da Vinci design to lift water for canals and irrigation?

Leonardo da Vinci designed versions of the Archimedes’ screw to lift water for canals and irrigation.

An Archimedes’ screw is a helical surface or blade wrapped around a shaft inside a tube or trough. When the shaft rotates, water is carried upward along the spiral. The mechanism is named after Archimedes, who is traditionally associated with the device in ancient Greece, although similar water-lifting principles may have older origins.

Leonardo studied and drew screw-based water-lifting machines as part of his investigations into hydraulics. His versions could be adapted to move water between different levels, a practical problem in drainage, irrigation, and canal construction. The device works best for relatively modest lifting heights and continuous flow.

Leonardo did not invent the underlying ancient mechanism. His contribution was to analyze, redraw, and develop engineering applications for it. This distinction matters because Renaissance notebooks often contain improvements to known machines as well as original proposals. Modern screw conveyors and screw pumps still use the same basic principle.