Areuse

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Areuse
The Areuse, spanned by the SBB viaduct

The Areuse, spanned by the SBB viaduct

Data
Water code CH : 206
location Switzerland
River system Rhine
Drain over Zihl Canal  → Aare  → Rhine  → North Sea
source in the cluse of Saint-Sulpice
46 ° 54 ′ 42 "  N , 6 ° 32 ′ 56"  E
Source height 790  m above sea level M.
muzzle near Boudry in Lake Neuchâtel Coordinates: 46 ° 56 ′ 44 ″  N , 6 ° 52 ′ 16 ″  E ; CH1903:  556 787  /  199 529 46 ° 56 '44 "  N , 6 ° 52' 16"  O
Mouth height 429  m above sea level M.
Height difference 361 m
Bottom slope 11 ‰
length 32 km
Catchment area 394 km²
Discharge
A Eo : 378 km²
Location: 3 km above the mouth 		NNQ (1994)
MNQ 1983–2016
MQ 1983–2016
Mq 1983–2016
 MHQ 1983–2016
HHQ (1990) 		270 l / s
6.73 m³ / s
11.3 m³ / s
29.9 l / (s km²)
 16.2 m³ / s
168 m³ / s
Left tributaries Noiraigue
Right tributaries Buttes

The Areuse is 32 kilometers in length and a catchment area of around 400 square kilometers of the main river in the canton of Neuchâtel in western Switzerland. It flows from the west-southwest into Lake Neuchâtel .

Surname

Its name is probably derived from the late Vulgar Latin " arrogium " (river) and is mentioned in 1280 as Arosa and in 1590 as La Reuse .

geography

Source de l'Areuse

Karst spring of the Areuse.

The Source de l'Areuse (German source of the Areuse ) is located at 800 m above sea level. M. in the Neuchâtel Jura in the clus of Saint-Sulpice (NE) . The river rises there at the foot of a rock ( Vauclusetyp ) with an average discharge of 700 liters per second. During the snowmelt (and especially with long-lasting precipitation events at the same time) the discharge can rise to well over 10,000 l / s. The karst spring is fed by the water from the Lac des Taillères , which has no surface drainage and is located six kilometers further north in the high valley of La Brévine . The source pond is dammed by a concrete weir.

course

The Areuse flows east through the gorge of Saint-Sulpice and reaches the wide Val de Travers Jura valley at Fleurier between the Chasseron and Soliat mountain ranges in the south and Crêt du Cervelet in the north. In Fleurier, it takes in the water of the Buttes river from the right , which at around 15 kilometers is a lot longer than the Areuse to this point, but has significantly less water.

Bridge in the Gorges de l'Areuse between Noiraigue and Boudry.

The second notable tributary is the Noiraigue , which is only 700 meters long and flows into the Areuse near the town of the same name. The Noiraigue also rises from a karst spring, which is fed by the water of the Bied that seeps into a pond in the high valley of Les Ponts-de-Martel .

Areuse (Switzerland)
source
source
muzzle
muzzle
Source and mouth of the Areuse

Below Noiraigue , the Areuse breaks through the southeastern Jura chain in a deep gorge. The Gorges de l'Areuse are one of the most important natural monuments in the Jura and are accessible via a hiking trail. In the area of ​​the elongated gorge, the river plunges 270 meters over several waterfalls. Between Noiraigue and the railway viaduct at Boudry , 17 bridges and footbridges cross the Areuse over a distance of 9.5 kilometers; the most famous Areusebrücke is the stone arch bridge at Saut de Brot . At the foot of the Jura , the Areuse flows through the large village of Boudry and the hamlet of Grandchamp (bearing the same Communauté ) and ends six kilometers southwest of Neuchatel with a broad alluvial fans in the Lake Neuchatel .

Catchment area

The catchment area of ​​the Areuse is 394.44 km² in size and consists of 48.1% wooded area , 46.4% agricultural area and 4.1% settlement area .

The mean height of the catchment area is 1070  m above sea level. M. , the minimum height is 428  m above sea level. M. and the maximum height at 1603  m above sea level. M.

Tributaries

  • Le Rio ( right )
  • L'Ubena ( left )
  • Le Ruisseau de Fin des Iles ( right )
  • Le Buttes ( right )
  • Le Fleurier ( right )
  • Le Bied de Môtier ( right )
  • La Vieille Areuse ( right fork )
  • Le Grand Fossé ( left )
  • Les Bochats ( right )
  • Petit Marais ( right )
  • Le Sucre ( left )
  • Le Croset ( left )
  • La Presta ( right )
  • Mosset ( right )
  • Le Loclat ( left )
  • Les Domaines ( right )
  • La Belleta ( right )
The Noiraigue
  • Le Passet ( right )
  • Le Crêt de l'anneau ( left )
  • Les Chenevières ( left )
  • La Noiraigue ( left )
  • Les Planchettes ( left )
  • Les Moyats ( left )
  • Le Vielvaux ( left )
  • Lanvouennes ( right )
  • Pontareuse ( right )
  • Les Sagnes ( right )
  • Le Merdasson ( left )
  • Les Gougillettes ( left )
  • Le Vivier ( right fork )

Special

The course of the river was corrected from 1867 to 1869 between Fleurier and Couvet . Further major corrections were made from 1949 to 1984.

The hydropower of the Areuse has been used in various places since the 14th century by mills , sawmills , and more recently also by cement works and electricity works.

Web links

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

Individual evidence

  1. ↑ a b Geoserver of the Swiss Federal Administration ( information )
  2. ↑ Evaluations of the water network. (XLSX) FOEN , December 2013, accessed on August 9, 2017 (listing of Swiss rivers> 30km).
  3. ↑ Topographical catchment areas of Swiss waters: area outlets. Retrieved May 30, 2019 .
  4. ↑ Boudry measuring station 1983–2016 (PDF) Federal Office for the Environment FOEN
  5. ↑ Topographic catchment areas of Swiss waters: Areuse