Borgne d'Arolla

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Borgne d'Arolla
Torrent de Bertol
The Borgne d'Arolla with Mont Collon in the background

The Borgne d'Arolla with Mont Collon in the background

Data
Water code CH : 110
location Switzerland
River system Rhone
Drain over Borgne  → Rhone  → Mediterranean
confluence of two short melt streams of water below the Bertolgletschers
46 ° 0 '15 "  N , 7 ° 30' 52"  O
Source height approx.  2815  m above sea level M.
confluence with Borgne de Ferpècle to Borgne Coordinates: 46 ° 14 ′ 38 ″  N , 7 ° 22 ′ 57 ″  E ; CH1903:  595 667  /  121391 46 ° 14 '38 "  N , 7 ° 22' 57"  O
Mouth height 1422  m above sea level M.
Height difference approx. 1393 m
Bottom slope approx. 11%
length 12.9 km
Catchment area 90.3 km²
Discharge  at the mouth of
A Eo : 90.3 km² 		MQ
Mq
 		3.5 m³ / s
38.8 l / (s km²)
Left tributaries Torrent d'Arolla, Torrent des Aiguilles Rouges, Torrent de la Maresse, Bornetta
Right tributaries Torrent des Douves Blanches, Torrent de la Roussette, Torrent de Veisivi
Communities Evolène

The Borgne d'Arolla is the approximately 13 kilometers long left source river of the Borgne in the Swiss canton of Valais . It flows through the Val d'Arolla in the municipality of Evolène .

course

The Borgne d'Arolla arises at about 2815  m above sea level. M. at the confluence of two short meltwater streams that arise from the Bertol Glacier . This extends over the western slope of the Pointe de Bertol , which is a little south of the 3668  m above sea level. M. high Aiguille de la Tsa rises. After a short walk to the southwest, she reaches the Val d'Arolla, where the water of the Arolla Glacier flows in from the left . This has a much larger catchment area at the mouth than the Borgne d'Arolla. The young river turns to the northwest and from the right takes in the Torrent des Douves Blanches , which rises from the Glacier des Douves Blanches .

A little later she turns to the north-northeast and passes Arolla , which is above the river . Here at the Petit Praz campsite, it picks up the water of the Torrent de la Roussette from the right . It flows past Pramousse and Satarma , where the Torrent des Aiguilles Rouges flows in from the left, which is below 3262  m above sea level. M. high La Roussette rises. It passes La Gouille takes a short out from the right from Petite Dent de Veisivi ( 3184  m above sea level. M. herkommenden) Torrent de Veisivi on. Immediately afterwards, at La Ventura, the Torrent de la Maresse follows from the left, which rises at Mont de l'Etoile ( 3184  m above sea level ).

The Borgne d'Arolla now passes Pralovin and takes the Bornetta from the left, before it at 1422  m above sea level. M. just a little west of the village of Les Haudères with the Borgne de Ferpècle flows into the Borgne .

Individual evidence

  1. ↑ a b c Geoserver of the Swiss Federal Administration ( information )
  2. ↑ a b Topographical catchment areas of Swiss waters: sub-catchment areas 2 km². Retrieved August 20, 2017 .