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The Ondaine or Ondenon is a river in the Loire department of France. It is a right tributary of the Loire.

Ondaine
Location
CountryFrance
Physical characteristics
Source 
  locationPlanfoy
  coordinates45°22′49″N 4°25′31″E
  elevation1,020 m (3,350 ft)
MouthLoire
  location
Unieux
  coordinates
45°25′03″N 4°14′55″E
  elevation
430 m (1,410 ft)
Length18.6 km (11.6 mi)
Basin size125 km2 (48 sq mi)
Basin features
ProgressionLoire→ Atlantic Ocean
Tributaries 
  leftCotatay , Valchérie , Echapre , Gampille
  rightEgotay , Borde-Morning

Geography


The Ondaine has its source in the woods of Neyranche in the commune of Planfoy[1] at an elevation of 1,020 metres (3,350 ft),[2] where it is called the Ondenon. When passing through the town of La Ricamarie it takes the name Ondaine. Its basin covers 122 square kilometres (47 sq mi)[1] mostly in the department of the Loire, but also in part of Haute-Loire.

The Ondaine is one of the rivers of the Loire Valley covered by "river contracts" that are supported by the General Council of the Loire, the Rhône-Alpes region, the Water Agencies, and the State. It flows into the Loire at the locality called Pertuiset in the commune of Unieux at 430 metres (1,410 ft) above sea level opposite Caloire.


Communes and cantons crossed


Cotatay Dam
Cotatay Dam

The Ondaine flows through the department of the Loire, passing from upstream to downstream through the communes of Planfoy (source), Saint-Genest-Malifaux, La Ricamarie, Le Chambon-Feugerolles, Firminy, Fraisses, Saint-Paul-en-Cornillon, Unieux (confluence) and Caloire.[lower-alpha 1] In terms of cantons, The Ondaine rises in the canton of Saint-Genest-Malifaux, passes through or beside the cantons of Le Chambon-Feugerolles, Saint-Genest-Malifaux and the canton of Firminy at its mouth.


Tributaries


The Ondaine has twelve named tributaries[1] of which the seven major tributaries are:


Hydrology and flooding


Ondenon Dam
Ondenon Dam

On 5 June 2007 a major flood on the Ondaine and small tributaries upstream caused by major storms flooded part of the city of Le Chambon-Feugerolles and caused extensive damage but no casualties.[10] Despite the rapid nature of the flood (about half an hour), the water rose to 1.7 metres (5 ft 7 in) in some homes. The weather service had issued a warning that storms could be locally strong.[11]


Facilities and ecology


The river was an open sewer in the late 1990s. It now houses fish species such as brown trout, minnow, gudgeon, sculpin, stone loach, European chub and perch. It is again a first class stream.


References


Notes

  1. SANDRE 2012 adds the communes of Saint-Romain-les-Atheux, Roche-la-Molière and Saint-Étienne

Citations

  1. Sandre. "Fiche cours d'eau - L'Ondaine (K0584000)". Retrieved 18 May 2012.
  2. Géoportail (France) - IGN. "Géoportail". Retrieved 18 May 2012.
  3. Sandre. "Fiche cours d'eau - Le Cotatay (K0584700)". Retrieved 18 May 2012.
  4. Sandre. "Fiche cours d'eau - La Valchérie (K0585500)". Retrieved 18 May 2012.
  5. Sandre. "Fiche cours d'eau - Le Malval (K0586200)". Retrieved 18 May 2012.
  6. Sandre. "Fiche cours d'eau - L'Echarpe (K0586300)". Retrieved 18 May 2012.
  7. Sandre. "Fiche cours d'eau - Le Borde Matin (K0586900)". Retrieved 18 May 2012.
  8. Sandre. "Fiche cours d'eau - La Gampille (K0587200)". Retrieved 18 May 2012.
  9. Sandre. "Fiche cours d'eau - L'Egotay (K0588700)". Retrieved 18 May 2012.
  10. Dépêche AFP sur le site de France 3 Archived 2004-11-07 at the Wayback Machine
  11. Carte vigilance Meteo France

На других языках


[de] Ondaine

Die Ondaine (im Oberlauf Odenon genannt) ist ein Fluss in Frankreich, der im Département Loire in der Region Auvergne-Rhône-Alpes verläuft. Sie entspringt an der Gemeindegrenze von Planfoy und Saint-Genest-Malifaux, im Regionalen Naturpark Pilat, entwässert generell Richtung West bis Nordwest durch das Ballungszentrum westlich von Saint-Étienne und mündet nach rund 19[3] Kilometern im Gemeindegebiet von Unieux im Rückstau der Barrage de Grangent als rechter Nebenfluss in die Loire.
- [en] Ondaine



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