Aqueduct
An Aqueduct indicates a work intended for the Water conveyance for the consumption of a city.
The word " aqueduc" from the Latin " comes; aquaeductus" , of " aqua" (ae, F; the water) and of " ductus" word derived from " ducere" which wants to say " conduire".
The oldest system of collective water conveyance seems to be that of Jerusalem.
Roman aqueducts
See also: List of the Roman aqueducts, Aqueducts of Rome
The old aqueducts used the simple force of the Gravitation to convey water: it was enough to give a light slope to the conduits so that water runs towards its destination. The disadvantage was that to pass a hill, it was necessary either to dig a Tunnel, or to circumvent it; in the same way, to pass a valley, it was necessary to build a Pont or to use a siphon.
The Roman aqueducts left many vestiges like the Pont of Gard in France, the Aqueduc of Segovia in Spain, the Aqueduc of Carthage in Tunisia, the aqueduct of Jouy-with-Arches close to Metz, etc… (see Liste of the Roman aqueducts). However, most of the course of these aqueducts was underground, and much less spectacular (see the photograph on the right aqueduct broken during the construction of a road, close to Poitiers) . the aqueduct of Mons to Frejus in the VAr (41.567 m length, 515 m of made uneven, 300 l/s) still partiellemnt in service, is in underground on most of its way, but passes in aqueduct bridge little before its arrival to Féjus to keep a sufficient height to highest feed a water tower at the point of the city.
Modern aqueducts
The current aqueducts are connected rather with Pipeline S, on the same model as the Oléoduc S or than the Gazoduc S: water is put in overpressure by Pompe S, which propels it in the conduit of metal, of circular section. This in particular makes it possible to be freed from part of the waves land and at the time of sending water at an altitude higher than that where it is collected.
- Aqueduct of Roquefavour, Ventabren (1842 - 1847)
- Aqueduct of the Valve, Paris (fine of the XIXe century)
- Aqueduct of Avre, Paris (1893)
- Aqueduct of Los Angeles, Los Angeles (XXe century)
- Aqueduct of Päijänne, Helsinki (1972 - 1982)
Other aqueducts
aqueduct|aqueduct
External bonds
- ''' aqueducts of Ile-de-France '''
- ''' the Aqueduct Médicis '''
- the Roman aqueduct of Gier, study and photographs of the Aqueduct of Gier which fed Lugdunum (Lyon)
- the Gallo-Roman aqueduct of the Round underground aqueduct close to Montrésor
- the Roman aqueduct of Pondel, in the Val of Aoste
- Recherches on the Gallo-Roman aqueduct Holy
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