Leonardo da Vinci designed sluice gates to control the flow and level of water in canals and rivers.
A sluice gate is a movable barrier that can be raised or lowered to regulate water. Leonardo studied canals extensively, especially in connection with transportation, irrigation, drainage, and flood control. His notebooks contain designs for gates and other hydraulic mechanisms.
Leonardo’s hydraulic work was practical as well as theoretical. He observed currents, eddies, erosion, and the behavior of water around obstacles. These observations helped him plan systems for moving boats and managing water levels, although not every drawing represents a completed invention.
A sluice gate differs from a lock gate. Sluices regulate flow or water height, while lock gates form part of a chamber that raises or lowers boats between water levels. Leonardo also investigated canal locks, so the two ideas are historically related but not identical.