Aqueduct (bridge)

Aqueducts or water bridges are bridges for transporting water. They 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.[1] 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 aqua ("water") and ducere ("to lead"),[2] therefore meaning "to lead water". A modern version of an aqueduct is a pipeline bridge. They may take the form of tunnels, networks of surface channels and canals, covered clay pipes or monumental bridges.

For bridges used by boats, see navigable aqueduct. For water supply, see Aqueduct (water supply). For other uses, see Aqueduct.

Pont du Gard, France, a Roman aqueduct built circa 40–60 CE. It is one of France's top tourist attractions and a World Heritage Site.
Aqueduct of Vanvitelli, Italy, built by Luigi Vanvitelli. It is a World Heritage Site and one of the finest examples of an aqueduct in Europe.

Ancient bridges for water
Mathur Aqueduct, India

Although particularly associated with the Romans, aqueducts were likely first used by the Minoans around 2000 BCE. The Minoans had developed what was then an extremely advanced irrigation system, including several aqueducts.[3]

In the seventh century BCE, the Assyrians built an 80 km long limestone aqueduct, which included a 10 m high section to cross a 300 m wide valley, to carry water to their capital city, Nineveh.[4]

Roman Empire
Main article: List of Roman bridges

Bridges were a distinctive feature of Roman aqueducts, which were built in all parts of the Roman Empire, from Germany to Africa, and especially in the city of Rome, where they supplied water to public baths and for drinking. Roman aqueducts set a standard of engineering that was not surpassed for more than a thousand years.

Ancient Indian aqueduct in Hampi

Modern aqueducts
Main article: Navigable aqueduct

Navigable aqueducts, also called water bridges, are water-filled bridges to allow vessels on a waterway to cross ravines or valleys. During the Industrial Revolution of the 18th century, navigable aqueducts were constructed as part of the boom in canal-building. A notable revolving aqueduct has been made on the Bridgewater Canal. This allowed vessels to cross at high and low levels while conserving water that would be lost in the operation of locks.

Notable aqueducts
Further information: List of aqueducts in the city of Rome and List of aqueducts in the Roman Empire

Roman aqueducts
Aqueduct of Segovia
Aqueduct Santiago de Queretaro, Mexico

Other aqueducts
An Aqueduct in Vila do Conde, Portugal
The Aqueduto dos Pegões in Tomar, Portugal
Kavala aqueduct, Greece
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See also

Notes
  1. "aqueduct", Britannica CD 2000
  2. "aqueduct", Britannica CD 2000
  3. Minoan Aqueducts: A Pioneering Technology, ancient.eu
  4. Thorkild Jacobsen and Seton Lloyd, Sennacherib's Aqueduct at Jerwan, Oriental Institute Publication 24, University of Chicago Press, 1935]
  5. Mexico – Travel

References
  • Sextus Julius Frontinus, De Aquaeductu Urbis Romae (On the water management of the city of Rome), Translated by R. H. Rodgers, 2003, University of Vermont
  • Aqueduct entry from Encyclopædia Britannica Eleventh Edition
  • Chanson, H. (2002). Certains Aspects de la Conception hydrauliques des Aqueducs Romains. ('Some Aspect on the Hydraulic Design of Roman Aqueducts.') Journal La Houille Blanche, No. 6/7, pp. 43–57 (ISSN 0018-6368)
  • Chanson, H. (2008). "The Hydraulics of Roman Aqueducts: What do we know? Why should we learn?" in Proceedings of World Environmental and Water Resources Congress 2008 Ahupua'a, ASCE-EWRI Education, Research and History Symposium, Hawaii, USA, Invited Keynote lecture, 13–16 May, R.W. Badcock Jr and R. Walton Eds., 16 pages (ISBN 978-0-7844-0976-3)
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