The document describes various hydraulic structures including cisterns, arabic baths, sewers, aqueducts, water wheels, water mills, water tanks, dikes, bridges, docks, dikes, ports, dams, and locks. These structures are used for storing water, transporting water, obtaining energy from water flow, crossing rivers, harboring boats, preventing erosion, and controlling water levels. They are typically constructed using materials like stone, timber, concrete, and steel and have architectural features such as arches, triangular shapes, post-and-beam systems, and massive constructions.