Grande Eau

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Grande Eau
The Grande Eau at Aigle

The Grande Eau at Aigle

Data
Water code CH : 147
location Canton of Vaud , Switzerland
River system Rhone
Drain over Rhone  → Mediterranean
source at Ormont-Dessus
46 ° 18 ′ 52 ″  N , 7 ° 10 ′ 4 ″  E
Source height approx.  2025  m
muzzle at Aigle in the Rhone coordinates: 46 ° 19 '32 "  N , 6 ° 55' 57"  E ; CH1903:  561016  /  130573 46 ° 19 '32 "  N , 6 ° 55' 57"  O
Mouth height approx.  381  m
Height difference approx. 1644 m
Bottom slope approx. 64 ‰
length 25.5 km
Catchment area 109.8 km²
Right tributaries Dar , Raverette , Torrent d'Yvorne
Communities Les Diablerets , Ormont-Dessous , Aigle , Yvorne

The Grande Eau is a 26 km long right tributary of the Rhone in the Swiss canton of Vaud . It drains a section of the Vaudois Alps . The catchment area of ​​the Grande Eau has an area of ​​about 132 km². The current name of the Grande Eau ( big water ) did not appear for the first time in the documents until the end of the 16th century . Before the river was named Rionziaz , first mentioned in 1287 in the form Ruysi , 1315 as Rionsiaz . Other written forms of name are Rionzo (1317), Ruisy (1323), Rionsy (1326), Rionsettaz (1327) and Rionse (1373).

course

Gorges de la Grande Eau near Ormont-Dessus

The headwaters of the Grande Eau are located on the parish of Ormont-Dessus south of the village of Les Diablerets. Several source streams gather in the Creux de Champ valley basin at around 1,400 m above sea level. M. to the Grande Eau. This basin is surrounded by the steep rock faces of the Les Diablerets massif, which is up to 3200 m high . The streams are fed, among other things, by meltwater from the firn fields Glacier de Pierredar , Mauvais Glacier and Glacier de Prapio (all located at 2,600 to 3,000 m above sea level).

After a short run, the Grande Eau reaches the wide valley of the resort of Les Diablerets. Here it takes the Torrent de Culan from the left (originates in the area of ​​the Col de la Croix ) and from the right the Dar (drains the west side of the Col du Pillon ). Below Les Diablerets, the brook turns to the west and initially flows through an open valley basin with a flood plain up to 500 m wide. Then the Grande Eau gradually sinks into the landscape and forms a deep, impassable valley in which it takes in another important side stream with the Raverette from the Col des Mosses .

At Aigle the Grande Eau enters the Rhone Valley one. Over time, it has raised an alluvial cone at its valley exit. It flows west of Aigle at 385 m above sea level. M. in the Rhône.

The Grande Eau is characterized by a nival runoff regime . The middle and upper reaches are largely preserved in their natural state, except in the area of ​​Les Diablerets. In the Aigle area and in the Rhone Valley, the course of the river was channeled, straightened and provided with flood protection structures. In the past, the Grande Eau often caused floods in Aigle. There are two hydropower plants along the course of the river.

See also

Web links

Commons : Grande Eau  - collection of images, videos and audio files

Individual evidence

  1. ^ Source on the geoserver of the Swiss Federal Administration
  2. ↑ estuary on the Geoserver the Swiss Federal Administration
  3. ↑ Length ( Memento of the original from August 19, 2014 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. Hydrological Atlas of Switzerland @1@ 2Template: Webachiv / IABot / www.hadesdaten.unibe.ch
  4. ^ Catchment area on the geoserver of the Swiss federal administration.