Black water (scythe)
| Black water | ||
 Confluence of the black water with the scythe; in the background the black water bridges |
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| Data | ||
| Water code | CH : 452 | |
| location | Canton of Bern ; Switzerland | |
| River system | Rhine | |
| Drain over | Sense → Saane → Aare → Rhine → North Sea | |
| Headwaters | near Rüschegg between the peaks of Pfyffe in the west and Schüpfenflue in the east 46 ° 44 ′ 1 ″ N , 7 ° 24 ′ 23 ″ E |
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| Source height | approx. 1500 m above sea level M. | |
| muzzle | in the sense coordinates: 46 ° 51 '47 " N , 7 ° 21' 35" E ; CH1903: 593 983 / 190217 46 ° 51 '47 " N , 7 ° 21' 35" O |
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| Mouth height | 577 m above sea level M. | |
| Height difference | approx. 923 m | |
| Bottom slope | approx. 44 ‰ | |
| length | 21.1 km | |
The Schwarzwasser is a 21.1 kilometer long right tributary of the Sense in the canton of Bern in Switzerland . It drains a section of the pre-alpine hill country north of the Gantrisch chain and belongs to the catchment area of the Rhine .
Headwaters
The headwaters of the black water are located at about 1500 m above sea level. M. on the parish of Rüschegg north of the Gantrisch area, in a valley basin on the northern slope of the Süftenegg between the peaks of Pfyffe ( 1666 m above sea level ) in the west and Schüpfenflue ( 1720 m above sea level ) in the east. In the first 5 km, the Schwarzwasser overcomes as a torrent a height difference of more than 700 m; the Kerbtal is mostly sunk deep into the slope. At the foot of the slope in the area of Heubach and Eigrund , the valley floor is filled with erosion material (rubble and gravel). Here the Schwarzwasser joins the Wissenbach , the Biberze (both from the right) and the Gambach (from the left), all brooks that drain the Gurnigel area.
Further course
Below Heubach the gradient of the black water decreases rapidly, initially it is 3%, in the further course it is only about 1%. The river now emerges into the hilly area of the Schwarzenburgerland, flowing with several turns, initially predominantly to the north, later to the northwest. In this middle and lower areas, the black water a canyon in the molasse of higher Swiss midlands deepened. The valley flanks are sometimes up to 200 m high and feature sandstone cliffs that are characteristic of the region . The valley floor is usually between 100 and 200 m wide and filled with rubble through which the river seeks its way. With every flood the black water changes its course through the gravel and rubble banks. In the lowest section, the floodplain with meadow is passed. The side streams, the larger of which are the Lindenbach , the Dorfbach and the Bütschelbach , have carved deep erosion valleys into the hill country over time.
At ( 577 m above sea level ) the black water flows into the Sense. Shortly before the mouth of the black water from the gorge is black water bridges , a truss arch bridge 1882 for road and a concrete arch bridge for the S6 of the BLS , at a height of 65 m spans.
The black water is characterized by a nivopluvial discharge regime . Flood events can occur in spring at the time of snowmelt as well as during the summer half-year as a result of strong thunderstorms or prolonged heavy rainfall in the northern Gantrisch area.
Large stretches of the black water river bed are still in their natural state today. The Schwarzwasserschlucht with its steep forest and rocky slopes is under nature protection. On the upper reaches, torrent barriers and flood protection dams were built at individual locations in the area of Heubach; but here too the river has predominantly a natural bed.
Web links
Individual evidence
- ↑ 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
