Unterer Grindelwaldgletscher

The glacial lake in 2008 and 2009

In May 2008 the lake reached a volume of 800'000 cubic metres and then drained. In April 2009 the lake formed again, very rapidly. On May 15th it attained a volume of 1.7 million cubic metres. Current information about the lake and the construction of drainage tunnel is given (in German) at "Gletschersee Grindelwald".

Unterer Grindelwaldgletscher, landslide, glacial lake
The lake at its maximum level in 2008, on May 18th. It now contains 800'000 cubic metres of water.
Unterer Grindelwaldgletscher, landslide, glacial lake
Flood caused by the draining of the lake on May 30th, 2008; view towards "Gletscherschlucht".
Unterer Grindelwaldgletscher, Bergsturz, landslide, glacial lake
The flood in the river Lütschine did not cause any significant damage in Grindelwald.
Unterer Grindelwaldgletscher, Bergsturz, landslide, glacial lake
The glacial lake after draining, June 5th, 2008
Unterer Grindelwaldgletscher, landslide, glacial lake
On May 12th, 2009 the lake had filled again to a volume of 1.7 million cubic metres, which is more than twice as much as in 2008 (compare first image of this series!).
Unterer Grindelwaldgletscher, landslide, glacial lake
Overview on May 12th, 2009 looking downvalley towards Grindelwald. The snowfield at centre marks the landslide deposit which dams the lake.
Unterer Grindelwaldgletscher, landslide, glacial lake
Landslide debris damming the glacial lake. Near the right margin of the photo, but below the present water level, the drainage tunnel will terminate and lower the lake level, as of spring 2010.
Unterer Grindelwaldgletscher, landslide, glacial lake
Bruno Petroni, who took the photos on this page, tries (without much success) to move a landslide boulder ;-) One week previously, it had not been here yet!
Fotos Bruno Petroni