DOLENT GL. DU
Event description
On July 10, 1990, part of the historical terminal
moraine of the Dolent Glacier collapsed and triggered
a debris flow of approximately 40`000 m3 which endangered a campsite
and a village in the Val Ferret, Valais, Swiss Alps.
Damage
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Data source
IUGG(CCS)/UNEP/UNESCO
(2005): Fluctuations of glaciers 1995 � 2000, Volume VIII (Haeberli, W., Zemp, M., Frauenfelder, R., Hoelzle, M. und K��b, A.; Eds.). World Glacier Monitoring Service,
University of Zurich, Z�rich.
Remarks
Investigation were carried out to determine the
triggering factors of the debris flows and to investigate wether
a degradation of the permafrost could explain the instability of the moraine. The
triggering factors of the debris flows are not yet clear. The instability of
the moraine was not induced by an extreme rainfall event.