Ourse

The Ourse, or Ourse de Ferrère, is a French river in the Pyrenees, a tributary of the Garonne. It is 25.4 km (15.8 mi) long.[1] It forms the Barousse valley.

Ourse
Confluence of the Ourse de Sost (left) and the Ourse de Ferrère (right) at Mauléon
Location
CountryFrance
Physical characteristics
Source 
  locationPyrenees
Mouth 
  location
Garonne
  coordinates
43.0217°N 0.6153°E / 43.0217; 0.6153 (Garonne-Ourse)
Length25.4 km (15.8 mi)
Basin size139 km2 (54 sq mi)
Basin features
ProgressionGaronneGironde estuaryAtlantic Ocean

Geography

According to the Sandre, its mother-course is the ruisseau de Seuès[1] which begins at 1,770 m high, NNW of the lac de Crouès.[2]

After a few km, it is joined left by the Salabe runlet and then becomes l'Ourse de Ferrère, which joins l'Ourse de Sost at Mauléon-Barousse and then becomes l'Ourse.

It joins the Garonne left bank at 441 m high in the commune of Loures-Barousse.[2]

The stream length of the path « Ruisseau de Seuès-Ourse de Ferrère-Ourse » is 25.4 km,[1] for a watershed of 139 km2.[3]

L'Ourse runs through 13 communes in the Hautes-Pyrénées, all located in the canton of Mauléon-Barousse, from high to low : Ferrère, Ourde, Mauléon-Barousse, Troubat, Bramevaque, Gembrie, Antichan, Créchets, Anla, Aveux, Sarp, Izaourt, et Loures-Barousse.

It has 20 tributaries recorded by the Sandre,[1] of which two are more than 5 km long :

  • the Salabe, 6.0 km, left bank,[4]
  • l'Ourse de Sost, 12,4 km, right bank.[5]

References

  1. Sandre. "Fiche cours d'eau - L'Ourse (O00-0460)".
  2. Géoportail
  3. Superficie du bassin versant « L'Ourse du confluent de l'Ourse de Sost au confluent de la Garonne (O008) » sur Sandre. "(O0081010)". Retrieved 15 July 2011.
  4. Sandre. "Fiche cours d'eau - Ruisseau de Salabe (O0060570)".
  5. Sandre. "Fiche cours d'eau - L'Ourse de Sost (O0070500)".
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