BLAAMANNSISEN
Event description
Subglacial drainage of a glacier-dammed lake. The
event lasted 35 hours with an estimated peak discharge of 800-900 m3/s.
The drained lake was almost completly emtied, and its water level dropped about 50 m, causing
water level in the hydropower reservoir to increase by about 2.5 m. The
drainage added an unforseen 40 mill m3 of
water to the Siso powerplant
reservoir.
Damage
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Data source
- http://www.nimbus.it/glaciorisk/Glacier_view.asp?IdGlacier=3277&Vista=rischio&Paese=&IdTipoRischio=8
Remarks
This is the first recorded j�kulhlaup
from the lake, and is probably a direct cause of climate change that has made
the glacier thinner so that it no longer dams the lake efficiently.