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Coordinates: 45°27′8″N 3°18′14″E / 45.45222°N 3.30389°E / 45.45222; 3.30389
Confluence of Alagnon and Alagnonnette
Confluence of Alagnon and Alagnonnette
Country  France
Region Auvergne-Rhône-Alpes
Departments Cantal, Haute-Loire, Puy-de-Dôme
 - left Allanche, Sianne, Bave, Auze
 - right Arcueil, Alagnonnette, Violette
Source Mounts of Cantal
 - location Laveissière, Cantal, France
 - elevation 1,590 m (5,217 ft)
 - coordinates 45°5′58″N 2°43′17″E / 45.09944°N 2.72139°E / 45.09944; 2.72139
Confluence Allier
 - location Auzat-la-Combelle, Puy-de-Dôme, France
 - elevation 390 m (1,280 ft)
 - coordinates 45°27′8″N 3°18′14″E / 45.45222°N 3.30389°E / 45.45222; 3.30389
Length 85.9 km (53 mi)
Basin 1,042 km² (402 sq mi)
Discharge for Lempdes-sur-Allagnon
 - average 11.9 /s (420 cu ft/s)
Wikimedia Commons: Alagnon

The Alagnon is a French river that starts in the Massif Central within the Regional Natural Park of the Volcanoes of Auvergne (French: Parc Naturel Régional des Volcans d'Auvergne) and that flows through the Auvergne-Rhône-Alpes region. It is a left tributary of the Allier.

Geography[change | change source]

The Alagnon river has a length of 85.9 km (53.4 mi) and a drainage basin with an area of 1,042 km2 (402 sq mi).[1]

Its average yearly discharge (volume of water which passes through a section of the river per unit of time) is 11.90 m3/s (420 cu ft/s) at Lempdes-sur-Allagnon in the Haute-Loire department.[2]

Average monthly discharge (m3/s) at Lempdes-sur-Allagnon (50 years)[2]

Course[change | change source]

The Alagnon river starts in the Mounts of Cantal (Massif Central), near the Puy Bataillouse mountain, commune of Laveissière, at an altitude of about 1,590 m (5,217 ft), in the Cantal department.[3] First, it flows to the east, near the Super Lioran ski resort, and gets into a gorge and, then, into a valley near Murat. The river flows in general to the northeast and gets into deep gorges in Lempdes-sur-Allagnon.

The Alagnon river flows through the Auvergne-Rhône-Alpes region, 3 departments and 23 communes. Two communes are named after the river: La Chapelle-d'Alagnon and Lempdes-sur-Allagnon. It flows through the following communes, among others:[1]

Finally, it flows into the Allier river in the town of Auzat-la-Combelle, in the place known as Le Saut du Loup, in the Puy-de-Dôme department.[4]

Main tributaries[change | change source]

The main tributaries, over 20 km long, of the Cère river are:[1]

Gallery[change | change source]

Related pages[change | change source]

References[change | change source]

  1. 1.0 1.1 1.2 "L'Alagnon (K25-0300)" (in French). SANDRE - Portail national d'accès aux référentiels sur l'eau. Retrieved 25 January 2017.
  2. 2.0 2.1 "L'Alagnon à Lempdes". Banque Hydro (in French). Ministère de l'Ecologie, du Développement Durable et de l'Energie. Retrieved 25 January 2017.
  3. "Source de l'Alagnon" (in French). Géoportail. Retrieved 25 January 2017.
  4. "Embouchure de l'Alagnon" (in French). Géoportail. Retrieved 25 January 2017.