Dranse (Haute-Savoie)
| Dranse | |
|---|---|
The Dranse de Morzine
|
|
| Native name | la Dranse |
| Country | France |
| Basin features | |
| Main source | Confluence of La Dranse d'Abondance and La Dranse de Morzine |
| River mouth | Lake Geneva |
| Progression | Rhône→ Mediterranean Sea |
| Basin size | 495 km2 (191 sq mi) |
| Physical characteristics | |
| Length | 49.1 km (30.5 mi) including La Dranse d'Abondance |
| Discharge |
|
The Dranse (French: la Dranse) is a French river in the department of Haute-Savoie, that empties into Lake Geneva between Thonon-les-Bains and Évian-les-Bains.
The name "" comes from the former Drantia, based on the hydronym dur-, dora and the suffix -antia.
The Dranse is formed from the combination of three mountainous rivers originating from the peaks of the upper Chablais Alps, which converge 9 to 10 kilometres (5.6 to 6.2 mi) upstream from the delta:
The Dranse d'Abondance is considered the higher-ordered stream of the Dranse. The Dranse de Morzine is consequently considered its tributary, according to Sandre, the French National Service for Water Data and Common Repositories Management.
The Dranse empties into Lake Geneva and forms a delta, which is integrated into the Delta de la Dranse National Nature Reserve, situated to the east of the commune of Thonon-les-Bains, which although small at an area of 53 hectares (130 acres), offers an incomparable botanic diversity.
The river is 49.1 kilometres (30.5 mi) long.Whitewater kayakers and commercial rafting companies frequently run this river.
The Dranse is a high-volume river, as are all the rivers which originate in the Alpine mountain ranges. Its discharge was observed for a period of 97 years (1906–2003) in Reyvroz, a locality in the department of Haute-Savoie situated on the southern bank of Lake Geneva at the same elevation as its outlet. The drainage basin for the river is in its totality 495 square kilometres (191 sq mi), which is not quite three times the surface area of the city of Paris.
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Wikipedia