Bourne (Isere)

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Bourne
The river in Pont-en-Royans

The river in Pont-en-Royans

Data
Water code FR :  W33-0400
location France , Auvergne-Rhône-Alpes region
River system Rhône
Drain over Isère  → Rhône  → Mediterranean
source in the local area of Lans-en-Vercore
45 ° 7 '38 "  N , 5 ° 34' 56"  O
Source height approx.  1008  m
muzzle on the municipal boundary of Saint-Nazaire-en-Royans and Saint-Just-de-Claix in the Isère Coordinates: 45 ° 3 ′ 59 ″  N , 5 ° 14 ′ 40 ″  E 45 ° 3 ′ 59 ″  N , 5 ° 14 ′ 40 ″  O
Mouth height approx.  162  m
Height difference approx. 846 m
Bottom slope approx. 20 ‰
length 43 km
Catchment area 818 km²
Discharge at the Saint-Just-de-Claix
A Eo gauge : 787 km² 		MQ
Mq
 		20 m³ / s
25.4 l / (s km²)
Left tributaries Vernaisson , Lyonne
Right tributaries Méaudret
Crossing the river through the Canal de la Bourne

Crossing the river through the Canal de la Bourne

The Bourne is a river in France that runs in the Auvergne-Rhône-Alpes region . It rises in the Vercors Mountains, in the local area of Lans-en-Vercors , generally drains southwest to west through the Vercors Regional Nature Park , where it is dammed near Choranche in Lac de Choranche to generate energy. The Bourne flows into the Isère after 43 kilometers below Saint-Nazaire-en-Royans , on the municipal border with Saint-Just-de-Claix , as a left tributary in the backwater of a hydropower plant . The Bourne runs largely in the Isère department and forms the border to the neighboring Drôme department on some sections, especially in the estuary section between Pont-en-Royans and Saint-Nazaire-en-Royans .

Places on the river

Canal de la Bourne

In the second half of the 19th century, water from the Bourne river was diverted below Pont-en-Royans and channeled into the Valence plain in an artificially constructed canal bed 46 kilometers in length to ensure the water supply for the arable land. The Canal de la Bourne initially follows the Bourne river to its confluence with the Isère, then further south following the river to Bourg-de-Péage , where it branches off to the south and is due to a distribution basin in the vicinity of Valence which in principle dissolves water withdrawals. The canal has a large number of engineering structures ( tunnels , aqueducts , barrages , pumping systems, etc.) and is still in operation. Every year it supplies between 15 and 30 million m³ of water for the irrigation of around 10,000 hectares of cultivated land.

Attractions

  • Gorges of the Bourne (French Gorges de la Bourne )
  • Aqueduct of the Canal de la Bourne in Saint-Nazaire-en-Royans

Web links

Commons : Bourne  - collection of images, videos and audio files

Individual evidence

  1. ↑ source geoportail.fr
  2. ^ Estuary geoportail.fr
  3. ↑ a b c The information on the length of the river is based on the information about the Bourne from SANDRE (French), accessed on February 9, 2011, rounded to full kilometers.
  4. ↑ hydro.eaufrance.fr (station: W3344010 , option: Synthèse )