Moorish aqueduct Elvas Aquaduct Portugal Roman aqueduct water supply channel constructed convey engineering canal canals
An aqueduct is a water supply or navigable channel constructed to convey water. In modern engineering, the term is used for any system of pipes, ditches, canals, tunnels, and other structures used for this purpose. In a more restricted use, aqueduct (occasionally water bridge) applies to any bridge or viaduct that transports water—instead of a path, road or railway—across a gap. Large navigable aqueducts are used as transport links for boats or ships. Aqueducts must span a crossing at the same level as the watercourses on each side. The word is derived from the Latin aqua ("water") and ducere ("to lead").
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