Wohlensee

Wohlensee
Location:	northwest of Bern
Tributaries:	Aare , Gäbelbach
Drain:	Aare
Larger places on the shore:	Hinterkappelen
Larger places nearby:	Mühleberg
	Canton of Bern , Switzerland
Coordinates	588 266 / 201960 coordinates: 46 ° 58 '7 " N , 7 ° 17' 4" O ; CH1903: five hundred eighty-eight thousand two hundred sixty-six / 201960
	Data on the structure
Lock type:	Gravity dam
Construction time:	1917-1920
Height of the barrier structure :	29 m
Height above the river bed :	20 m
Building volume:	50 000 m³
Crown length:	250 m
Power plant output:	45 MW
Operator:	BKW energy
	Data on the reservoir
Altitude (at congestion destination )	481 m
Water surface	3.25 km²
Reservoir length	12.1 km
Reservoir width	0.7 km maximum
Storage space	9 million m³
Total storage space :	25 million m³
Catchment area	2 969 km²
Design flood :	975 m³ / s
	map

Aerial photograph by Walter Mittelholzer (1932)

The Wohlensee is a reservoir on the Aare , located in the Swiss canton of Bern, northwest of the city of Bern, between Herrenschwanden in the municipality of Kirchlindach and Mühleberg .

geography

Because the Wohlensee is located in a ravine dug into the molasse underground by the Aare, it is narrow and long. The flow speed in the reservoir is low, which is why the silting up of the lake below the Halen Bridge is progressing rapidly.

The Kappelenbrücke , a concrete bridge that was opened in 1920 and replaced the old river crossing that was flooded by the lake, crosses the Wohlensee . A side street leads over the dam.

power plant

The lake is dammed near Mühleberg by the gravity dam of the ⊙ Mühleberg hydroelectric power station . In the machine house, six Francis turbines , each with an output of 6 MW, generate 50 Hz electricity for the national network, and a Kaplan turbine with an output of 9 MW generates 16.7 Hz electricity for the rail network . 46.969222222222 7.2844444444444

The Bern government council granted the concession to build the power station in 1917. For this purpose, the Gümmenen – Mühleberg trackless railway was set up in 1918 . When the damming of the water began after the construction was completed in July 1920, more than 300 hectares of land disappeared into the water. The power plant went into operation on August 23, 1920.

In 2017 the power plant license was renewed for 80 years.

About 1.5 km below the hydropower plant is the Mühleberg nuclear power plant , which was in operation between 1972 and 2019.

leisure

The Rowing Club Bern was founded in 1919 . The clubhouse is in the Eymatt near Bern, in the upper area of the Wohlensee, which is considered to be one of the most suitable waters in Switzerland for rowing.

The 1973 founded SC Wohlensee , a football club in the municipality of Wohlen, plays directly on the lake below the Kappelenring development.

In 1997, the Wohlensee rowing club was founded. He promotes rowing on the Wohlensee as a popular sport and regularly offers courses for beginners and advanced.

sewage

Among other things, the wastewater mixed with chlorine is fed from the Weyermannshaus swimming pool in Bern into the Wohlensee.

literature

Thomas Brodbeck, Franz Haag, Andrea Schüpfbach (eds.): Wohlen near Bern in the 19th and 20th centuries: a community between town and country . With a preface by the mayor Christian Müller and the head of department Cristina Camponovo. With contributions by Marianne Blankenhorn and Franz Haag. Project management: Franz Haag. Municipality of Wohlen 2006, ISBN 978-3-033-00945-5 .

Web links

Commons : Wohlensee - collection of images, videos and audio files

Swiss Dam Committee, characteristics ( Memento from May 14, 2012 in the Internet Archive )
The power plant ( memento from November 16, 2012 in the Internet Archive ) on the BKW website.
Protection Association Wohlensee

photos

Wohlensee near Hinterkappelen with part of the Kappelenring development
Wohlensee near Hinterkappelen with the Hintere Aumatt settlement
Mühleberg hydropower plant
Reminder plaque for those involved

Individual evidence

↑ Federal Office of Energy (Ed.): Statistics of the hydropower plants in Switzerland . January 1, 2018 (Central No. 203500).
↑ Federal Office of Energy (Ed.): Statistics of the hydropower plants in Switzerland . January 1, 1928 (Central No. 16).
↑ BKW may continue to operate the Mühleberg hydropower plant In: Der Bund , September 7, 2017, accessed on August 16, 2019.
↑ Bern Weyermannshaus outdoor swimming pool is getting closer to its renovation. In: bluewin.ch . May 16, 2019, accessed June 17, 2019 .

[1] Federal Office of Energy (Ed.): Statistics of the hydropower plants in Switzerland . January 1, 2018 (Central No. 203500).

[2] Federal Office of Energy (Ed.): Statistics of the hydropower plants in Switzerland . January 1, 1928 (Central No. 16).

[3] BKW may continue to operate the Mühleberg hydropower plant In: Der Bund , September 7, 2017, accessed on August 16, 2019.

[4] Bern Weyermannshaus outdoor swimming pool is getting closer to its renovation. In: bluewin.ch . May 16, 2019, accessed June 17, 2019 .