Transcript Folie 1 - AINEVA

Auxiliary Matrix – Level 5
Probability of Avalanche Release
Lawinenwarnzentrale
generally only
with large
surcharge
single hazard sites
Distribution of Hazard Sites
(specifiable in avalanche
report *)
hazard sites on some
steep slopes
(specifiable in avalanche
report *)
hazard sites on many
steep slopes
(specifiable in avalanche
report *)
hazard sites on many
steep slopes **)
particularly with
large surcharge already with small
(possibly also
surcharge
with small
possible
surcharge)
with small
surcharge
probable
or
Spontaneous
release of small
avalanches
possible
Spontaneous
Spontaneous
release of
release of many
medium, in some
medium, in
cases large
several cases
avalanches
large avalanches
possible
probable
Spontaneous
release of many
large avalanches
probable
1
2
2
2
1
2
2
2
3
3
2
3
3
2
2
3
4
2
3
4
4
2
3
4
4
3
4
4
5
4
5
5
Hazard sites
also in moderately
steep slopes
*) specifiable with respect to altitude, exposition and/or relief
**) the hazard sites are too numerous or too diffusely distributed
to be specifiable with respect to altitude, exposition and/or relief
5
Auxiliary matrix
for the avalanche report
26.04.2005
Analysis February 1999
Galtür: (31 +)
23.02.1999
 Valzur: (7 +)
24.02.1999
Weather situation
 Steady weather-fronts from north-west
(starting on January 27th/28th 1999)
 Steady sequence of warm-weather and
cold-weather fronts
 Nearly daily very intensive snow falls
 Stormy winds
 Intensive snow-drift
Weather-chart from
15.02.1999
T
H
T
T
Meteorological statistics Februar 1999
600
500
Neuschnee
Februar '99
400
300
bisheriges Neuschneemaximum
200
NS
Schröcken
483
Warth
490
Partenen
297
Langen
458
Holzgau
351
St. Anton a.A. 230
Nauders
206
Galtür
375
%
284
350
333
318
508
324
479
595
NSmax
540
470
285
417
254
398
240
266
Jahr
1970
1970
1946
1946
1984
1970
1970
1970
Galtür
Nauders
St. Anton
a.A.
Holzgau
Langen
Partenen
Warth
0
Schröcken
100
Rang 99 Periode
2 1926-1996
1 1945-1996
1 1933-1996
1 1926-1996
1 1895-1996
4 ?? 1895-1996
2 1895-1996
1 1895-1996
Avalanche situation - February 1999
street-closure
Big avalanche accidents
Helicopter fligths (evacuation, inquiries, transport)
Images of the avalanche in Galtür on
Tuesday, 23th of February 1999, 04:00 p.m….
Avalanche dimensions, victims and
balance of damage in Galtür





Wasserleiter- and Weiße Riefe- Lawine
Width 400m, elevation difference 1000m
Fracture line between 5m and 10m
Mass of the avalanche 130.000 tons
100 buried people, of them
 31 fatalities (last was found on Feb. 27th)
 11 severly injuried people
 25 little injured people

60 houses, 100 cars destroyed,
approximately
150 Mio ATS damage to
property
Images of the Innere RievenbachAvalanche in Valzur on
Wednesday, 24th of February 1999, 04:24
p.m.
Avalanche dimensions, victims and
balance of damage in Valzur
 Innere Rievenbach-Lawine
 Width 400m
 8 houses destroyed
 18 cars destroyed
 19 buried people, of them
 7 fatalities
 1 kid was found after 2 hours of burial time
and could survive
 Stop of the search at 8:00 p.m. (danger!)
 End of search on Feb. 26th