Bridges for conveying water, called
aqueducts or
water bridges are constructed to convey
watercourses across gaps such as valleys or ravines. The term
aqueduct may also be used to refer to the
entire watercourse, as well as the bridge. 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 end. The word is derived from the
Latin ("water") and ("to lead"). A modern version of an
aqueduct is a
pipeline bridge.