Schwarzwasser (Sense)

Schwarzwasser is an approximately 21.1 kilometre (13.3 mi) long right tributary of the Sense River in the canton of Bern in Switzerland. It drains a section of pre-Alpine hill country north of the Gantrisch chain and is part of the Rhine catchment area.

Source area
The headwaters of the Schwarzwasser are located at about 1500 m a.s.l. on the municipal ground of Rüschegg north of the Gantrisch area, in a basin on the northern slope of the Süftenegg between the peaks of Pfyffe (1666 m a.s.l.) in the west and Schüpfenflue (1720 m a.s.l.) in the east. In the first 5 km, the Schwarzwasser torrent overcomes a difference in altitude of more than 700 m; the notch valley is mostly deeply sunken into the slope. At the foot of the slope in the area of Heubach and Eigrund, the valley is filled with erosion material (boulders and gravel). Here the Schwarzwasser joins the Wissenbach, the Biberze (both from the right) and the Gambach (from the left), all streams that drain the Gurnigel area.