Leonardo da Vinci studied canal locks with movable gates for controlling water levels and boat movement.
While working in northern Italy, Leonardo investigated canals, irrigation, and hydraulic engineering. His notes and designs included lock arrangements that allowed vessels to pass between sections of water at different elevations. The gates could close a chamber, after which water levels could be raised or lowered.
A canal lock is not simply a gate across a waterway. It is a chamber system with gates at its ends, allowing boats to move between elevations without requiring a continuous slope. Leonardo also studied related mechanisms, including sluices and canal improvements.
Leonardo’s work belongs to a long history of Italian canal engineering rather than representing the first lock ever made. His importance lies in the detailed analysis and refinement of hydraulic structures during the Renaissance.