This lecture covers the design and construction of canals, galleries, and hydraulic installations, focusing on elements such as supply lines, thresholds, and hydraulic platforms. It discusses the use of canals for water transportation, the construction of aqueducts, and the optimal design of water supply systems. The lecture also addresses the operational parameters, maintenance, and stability considerations of hydraulic constructions, emphasizing the importance of uniform flow and hydraulic sizing. Additionally, it explores the impact of pressure drops, construction costs, and environmental factors on the design process, highlighting the need for durability and efficiency in hydraulic structures.