Dora Riparia
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The Dora Riparia (; pms, Dòira Rivaira; french: Doire Ripaire or ''Doire''; la, Duria minor) is an alpine river, a left-hand tributary of the Po. It is long (of which 5 km in France), with a
drainage basin A drainage basin is an area of land where all flowing surface water converges to a single point, such as a river mouth, or flows into another body of water, such as a lake or ocean. A basin is separated from adjacent basins by a perimeter ...

drainage basin
. It originates in the Cottian Alps, close to the
Col de Montgenèvre The Col de Montgenèvre (; elevation 1860 m.) is a high mountain pass in the Cottian Alps, in France 2 kilometres away from Italy. Description The pass takes its name from the village Montgenèvre (Hautes-Alpes), which lies in the vicinity ...
in France, where it is called the Piccola Dora. Its name becomes the Dora Riparia after the confluence with the Ripa in the Argentera Valley and the Thuras de Bousson close to Cesana. Further down the valley, in
Oulx Oulx ( oc, label=Vivaro-Alpine dialect, Occitan, Ors) is a ''comune'' (municipality) in the Metropolitan City of Turin in the Italy, Italian region Piedmont, located about west of Turin, in the Susa Valley on the border with France. Names Like m ...

Oulx
, the river grows thanks to its main upper tributary, the Dora di Bardonecchia, and before
Susa Susa ( ; Middle elx, 𒀸𒋗𒊺𒂗, translit=Šušen; Middle and Neo- elx, 𒋢𒋢𒌦, translit=Šušun; Neo-Elamite language, Elamite and Achaemenid Empire, Achaemenid elx, 𒀸𒋗𒐼𒀭, translit=Šušán; Achaemenid Empire, Achaem ...
is augmented by the Galambra and Cenischia. After Susa, it only receives minor tributaries: from the left, Gravio by Condove, Sessi by Caprie, and Messa by Almese, from the right Scaglione by Meana and Gravio by Villar Focchiardo. It runs through the
Susa Valley The Susa Valley ( it, Val di Susa; pms, Valsusa; french: Val de Suse; oc, Val d'Ors) is a valley in the Metropolitan City of Turin, Piedmont region of northern Italy, located between the Graian Alps in the north and the Cottian Alps in the south ...
, and after having crossed part of the plain of the Po and the territories of the comunes of
Avigliana Avigliana (Piedmontese language, Piedmontese: ''Vijan-a'' ; French language, French : ''Veillane'') is a town and ''comune'' (municipality) in the Metropolitan City of Turin in the Piedmont region or Italy, with 12,480 inhabitants as of January 1, ...
, Alpignano, Pianezza and Collegno, joins the Po at
Turin Turin ( , Piedmontese language, Piedmontese: ; it, Torino ) is a city and an important business and cultural centre in Northern Italy. It is the capital city of Piedmont and of the Metropolitan City of Turin, and was the first Italian capital ...

Turin
. It is considered a "stream" (''torrente'') until Susa, and a river (''fiume'') to Turin. It was at the confluence of the Dora Riparia and the Po that present-day Turin was founded in
Roman Roman or Romans most often refers to: *Rome, the capital city of Italy *Ancient Rome, Roman civilization from 8th century BC to 5th century AD *Roman people, the people of ancient Rome *''Epistle to the Romans'', shortened to ''Romans'', a letter ...
times. Dora Riparia was there for a long time the main source of energy: already in medieval times its water was collected in
canal Canals or artificial waterways are waterways or engineered channels built for drainage management (e.g. flood control and irrigation) or for conveyancing water transport vehicles (e.g. water taxi). They carry free, calm surface flo ...

canal
s (') that drove ,
water wheel A water wheel is a machine for converting the energy of flowing or falling water into useful forms of power, often in a watermill. A water wheel consists of a wheel (usually constructed from wood or metal), with a number of blades or buckets ...

water wheel
s and other contraptions. In the area between the confluence of Dora Riparia and in the Po, where before the destruction caused by the Battle of Turin in 1706 one could find the ''Regio'' park, lies today the ''Parco della Colletta''. One of the bridges spanning the river at Turin is Ponte Mosca. In the 20th century, industrial and urban development significantly degenerated environmental conditions in the river; renovation work did not start until the 1990s. In 1999, the environmental protection agency ARPA (the Regional Agency for Environmental Protection) conducted a study of the entire Dora Riparia and the river Sangone, revealing a condition of serious pollution. Then, in 2002, the agro-natural park of Dora Riparia was born, financed by the comune of Collegno and the region of Po, to preserve the natural habitat, but also to integrate agricultural and river area.


References

{{Authority control Rivers of Provence-Alpes-Côte d'Azur Rivers of France Rivers of the Province of Turin International rivers of Europe Rivers of Italy Rivers of Hautes-Alpes Rivers of the Alps