Ourse

L'Ourse, or Ourse de Ferrère, is a French river in the Pyrenees, a tributary of la Garonne.

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
ProgressionGaronne→ Gironde estuary→ Atlantic Ocean

It forms the Barousse valley.

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 area covered « Ruisseau de Seuès-Ourse de Ferrère-Ourse » is 25,4 km long,[1] for a watershed of 139 km wide.[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 km, left bank,[4]
  • l'Ourse de Sost, 12,4 km, right bank.[5]
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References
  1. Sandre. "L'Ourse (O00-0460)". Retrieved 15 July 2011.
  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. "Ruisseau de Salabe (O0060570)". Retrieved 16 July 2011.
  5. Sandre. "L'Ourse de Sost (O0070500)". Retrieved 16 July 2011.
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