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, ...

. It originates in the

Cottian Alps The Cottian Alps (; french: Alpes Cottiennes ; it, Alpi Cozie ) are a mountain range in the southwestern part of the Alps. They form the border between France (Hautes-Alpes and Savoie) and Italy (Piedmont). The Fréjus Road Tunnel and Fréjus Ra ...

, 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 Cesana Torinese (French ''Césanne'') is a '' comune'' (municipality) in the Metropolitan City of Turin in the Italian region Piedmont, located about west of Turin, on the border with France. Cesana is a popular winter ski resort, being connect ...

. Further down the valley, in

Oulx Oulx ( oc, label= Occitan, Ors) is a ''comune'' (municipality) in the Metropolitan City of Turin in the Italian region Piedmont, located about west of Turin, in the Susa Valley on the border with France. Names Like many other towns in the Susa V ...

, the river grows thanks to its main upper tributary, the Dora di Bardonecchia, and before Susa 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, and after having crossed part of the plain of the Po and the territories of the comunes of

Avigliana Avigliana (Piedmontese: ''Vijan-a'' ; 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, 2017. It lies about west of Turin ...

, Alpignano, Pianezza and

Collegno Collegno (; pms, Colegn ) is a ''comune'' (municipality) in the Metropolitan City of Turin in the Italian region Piedmont, located about west of Turin. It occupies an alluvial plain at the end of the Val di Susa, between Rivoli and Turin, at ...

, joins the Po at

Turin Turin ( , 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 from 1861 to 1865. The ...

. 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 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 ...

s (') that drove

mills Mills is the plural form of mill, but may also refer to: As a name * Mills (surname), a common family name of English or Gaelic origin * Mills (given name) *Mills, a fictional British secret agent in a trilogy by writer Manning O'Brine Places Uni ...

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 bucket ...

s and other contraptions. In the area between the confluence of Dora Riparia and

Stura Stura was a department of the French Consulate and of the First French Empire in present-day Italy. It was named after the river Stura di Demonte. It was formed in 1802, when the Subalpine Republic (formerly the mainland portion of the Kingdo ...

in the Po, where before the destruction caused by the

Battle of Turin The siege of Turin took place from June to September 1706, during the War of the Spanish Succession, when a French army led by Louis de la Feuillade besieged the Savoyard capital of Turin. The campaign by Prince Eugene of Savoy that led to i ...

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 Urban means "related to a city". In that sense, the term may refer to: * Urban area, geographical area distinct from rural areas * Urban culture, the culture of towns and cities Urban may also refer to: General * Urban (name), a list of people ...

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 Sāngone ( Samoan: , 'tribe', Fijian: , 'child'), was the name of a turtle from divine origin and featuring in Tongan myths about the Tui Tonga king named Tuitātui in the beginning of the 12th century AD. Part of the history features prominentl ...

, 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