International Symposium on Mitigative Measures against Snow ...

<strong>International</strong> <strong>Symposium</strong> on Mitigative Measures against Snow Avalanches
Egilsstaðir, Iceland, March 11–14, 2008
annual Avalanche protection budget in Tyrol. Maintenance of check dams in gullies is much
higher because of the age of the dams (approx.30%). A lot of them were built in the first half
of the 19 th century and earlier. A topic for the next decades must be a stepping up in effort for
quality control and maintenance programs. Necessary is the
o Implementation of a life cycling program based on a database, where all protection
work is collected, described and valued particularly in view of its function during a
design event. An Austrian standard is under development on the Austrian Standard
Institute. The first part of this regulation came into force in Autumn 2007 (ONR
24803 – Schutzbauten der Wildbachverbauung, Betrieb, Überwachung, Instandhaltung
und Kontrolle), the second part is to expect in Autumn 2008 (ONR 24807 –
Technischer Lawinenschutz; Instandhaltung und Kontrolle).
o Consequent cost/benefit investigation and a ordering of requests for mitigation
measures based on this results.
o Comprehensive risk based regional protection systems which contain permanent
technical protection methods as well as forest biological methods and temporary
methods.
4. CONCLUSION
A great amount of protection work has been implemented in Austria in the last 120 years.
Despite this intensive effort to reduce the threat by Natural Hazards, a much property is still
situated and many people are still living in hazardous areas. An exact view to the future is not
possible because of the unknown socio-economical and political circumstances in the future.
Climate change may bring some additional aggravation, in particular in flood hazard. Exact
forecast is not possible. Nevertheless, life cycling management programs have to be
established with high emphasis.
5. REFERENCES
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lebensfeindlicher Gefahrenzone. Wildbach – und Lawinenverbau, 153, 13–16.
Keuschnigg, G. 2005. Bauer im Jahr 2020 – Chancen und Risken alpiner Regionen aus
landwirtschaftlichen Sicht. Wildbach – und Lawinenverbau, 153, 64–66.
Gabl, K. 2005. Chancen des alpinen Lebensraumes unter geänderten klimatischen Bedingungen
– Szenarien aus der Sicht der Meteorologie. Wildbach – und Lawinenverbau,
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Martin, E., G. Giraud, Y. Lejeune and G. Boudart. 2001. Impact of a climate change on
avalanche hazard. A. Glaciol., 32, 163–167.
Formayer, H., and Ch. Frischauf. 2004. Extremereignisse und Klimawandel in Österreich aus
der Sicht der Forschung. BOKU Wien, Studie im Auftrag des WWF (unpublished).
IPCC. 2007. Summary for Policymakers. In: Climate change 2007: The Physical Science
Basis. Contribution of Working Group I to the Fourth Assessment Report of the
Intergovernmental Panel on Climate Change.
114 Avalanche protection in Austria − present stage and future development