Bonne (Drac)

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Bonne
The river below the Pont des Fayettes bridge

The river below the Pont des Fayettes bridge

Data
Water code FR :  W23-0400
location France , Auvergne-Rhône-Alpes region
River system Rhône
Drain over Drac  → Isère  → Rhône  → Mediterranean
source in the municipality of Valjouffrey
44 ° 52 ′ 14 ″  N , 6 ° 11 ′ 27 ″  E
Source height approx.  2760  m
muzzle on the municipal boundary of Ponsonnas and Saint-Pierre-de-Méaroz in the Drac coordinates: 44 ° 52 '52 "  N , 5 ° 47' 43"  E, 44 ° 52 '52 "  N , 5 ° 47' 43"  E
Mouth height approx.  510  m
Height difference approx. 2250 m
Bottom slope approx. 56 ‰
length 40 km
Right tributaries Malsanne, Roizonne
Bonne Viaduct

Bonne Viaduct

The Bonne is a mountain river in France that runs in the Isère department in the Auvergne-Rhône-Alpes region . It rises in the Écrins National Park from the Glacier de Font Turbat glacier , on the southeast flank of the Aiguille de l'Olan summit (3373 m), in the municipality of Valjouffrey . The river generally drains in a westerly direction through the valley of the Valjouffrey , later that of the Valbonnais, and after 40 kilometers it flows into the Drac as a right tributary at the municipal boundary of Ponsonnas and Saint-Pierre-de-Méaroz .

Hydrology

Below La Chapelle en Valjouffrey , water is taken from the river and branched off into the Canal du Beaumont . This irrigation canal connects the valley of the Valbonnais with that of Beaumont, which lies further south in a very poorly irrigated zone and is also fully oriented to the south. Since the Valbonnais, in contrast, is very well supplied by the rich water supply of the Bonne, the canal was planned and built in the 1st half of the 19th century; it opened in 1873. It is still in use today and there is a tourist trail for hikers and cyclists along its route.

Places on the river

Attractions

  • Pont des Fayettes , wooden bridge with roof on the D526, in the municipality of Valbonne.
  • Bonne Viaduct , a railway viaduct built in the 1920s , is now used for road traffic and connects the D26 with the D526 (curved course, 7 arches, 180 m long, 55 m high).
  • Natura 2000 protected area in the upper reaches north of the river is registered under number FR8201751.

Web links

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

Individual evidence

  1. ↑ Source geoportail.gouv.fr
  2. ↑ estuary geoportail.gouv.fr
  3. ↑ a b The information on the length of the river is based on the information about the Bonne at SANDRE (French), accessed on January 23, 2013, rounded to full kilometers.