Leonardo da Vinci studied sluice gates as water-control devices for regulating flow in canals.
A sluice gate is a movable barrier that can be raised or lowered to control water passing through an opening. Leonardo’s engineering notebooks contain studies of gates, channels, locks, and the movement of water. These designs supported his broader interest in improving transport and water management in northern Italy.
A sluice gate is not the same as a water wheel. A wheel uses flowing water to produce motion, while a gate controls the water itself. Leonardo also examined canal locks, which raise or lower boats between water levels; a gate can form part of a lock but is not the entire lock system.
His water studies combined observation with practical design. They helped him reason about currents, pressure, turbulence, and the geometry needed to move boats and water through engineered channels.