Berninabach

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Bernina
Bach Ova da Bernina
Ova da Bernina.jpg
Data
Water code CH : 47
location Val Bernina , Canton of Graubünden , Switzerland
River system Danube
Drain over Flaz  → Inn  → Danube  → Black Sea
source in Lej Nair
46 ° 25 ′ 3 ″  N , 10 ° 0 ′ 20 ″  E
Source height 2222  m above sea level M.
confluence with the Rosegbach to Flaz near Pontresina Coordinates: 46 ° 29 ′ 33 ″  N , 9 ° 54 ′ 1 ″  E ; CH1903:  788 953  /  151981 46 ° 29 '33 "  N , 9 ° 54' 1"  O
Mouth height 1756  m above sea level M.
Height difference 466 m
Bottom slope 36 ‰
length 12.9 km
Catchment area 109.11 km²
Discharge at the estuary
A Eo : 109.11 km²
MQ
Mq
4.8 m³ / s
44 l / (s km²)
Left tributaries Ova da Diavolezza, Ova da Morteratsch
Right tributaries Ova da la Val Minor, Ova da la Val da Fain, Montebello Bach, Ovel da Languard
Flowing lakes Lej Pitschen
Communities Pontresina
Lej Nair

Lej Nair

The Berninabach ( Rhaeto-Romanic Ova da Bernina ? / I ) is an approximately 13 kilometers long right tributary of the Inn in the Swiss canton of Graubünden . Audio file / audio sample

The river flows in a north-westerly direction through the Val Bernina . Together with its tributaries, it drains the north-facing glaciers of the Bernina group , of which the Morteratsch , Pers and Tschierva glaciers are the most important.

The two longest source branches of the Bernina stream arise from the glaciers and rubble slopes on the northern slope of the Piz d 'Arlas in the east of the Bernina main ridge . On reaching the valley of the Bernina Pass, the right one flows through the Lej Nair (Black Lake) at an altitude of 2223 meters and the La Pitschen . Above the Lej Nair a has spätwürmeiszeitliche moraine this glacier dammed the upper Berninatal and to Puschlav effluent Lago Bianco (White Lake) is formed. Contrary to the general slope of the valley, Lago Bianco does not belong to the area of ​​the Bernina stream, not even before the construction of the dam that marks the top of the pass and the valley watershed .

At Alp da Buond Sur , the Ova da Diavolezza flows from the left into the Bernina stream . In the further course of the Bernina stream receives three tributaries, which are almost equal to it at the mouth. The first two come from the right, from the Val Minor (Smaller Valley) and Val da Fain . Below the Alp Bernina Suot and the Punt da Bernina river bridges , the Berninabach falls in several smaller waterfalls ( Cascata da Bernina ) to the almost two hundred meters lower valley floor of the Ova da Morteratsch , which reaches the Berninabach from the left, and the Bernina Railway that follows the brook needs one Wide sweeping loop to reach the bottom of the valley again at the Morteratsch station . Only from here on are the lower valley slopes characterized by coniferous forest. The stream overcomes the next valley step near Pontresina in a narrow gorge , which is crossed by a new road bridge and the old Punt Ota . Shortly afterwards it flows together with the Rosegbach at an altitude of 1770 meters and from then on forms the Flaz , which flows into the Inn at Samedan .

The Bernina stream as the actual upper reaches of the Flaz (the catchment area of ​​the Bernina stream is around 65 percent larger than that of the Rosegbach) is hydrologically the main source of the Danube system, as the Flaz and Inn are each somewhat larger rivers at the mouths at Samedan and Passau .

The road to the Bernina Pass crosses the Bernina Stream twice, the Bernina Railway five times.

The water quality of the Bernina stream, on which there are no large settlements, is good.

Web links

Commons : Ova da Bernina  - collection of images, videos and audio files

Individual evidence

  1. a b Geoserver of the Swiss Federal Administration ( information )
  2. Hydrological Atlas of Switzerland of the Federal Office for the Environment FOEN, Table_13
  3. a b Modeled mean annual discharge. In: Topographical catchment areas of Swiss waters: sub-catchment areas 2 km². Retrieved August 26, 2017 .
  4. Berninabach cases on berninabahn.ch, accessed on February 21, 2017