potential slab avalanche release area identification from estimated winter terrain: a multi-scale, fuzzy logic approach
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2016
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Abstract
Avalanche hazard assessment requires a very precise estimation of the release
area, which still depends, to a large extent, on expert judgement of avalanche
specialists. Therefore, a new algorithm for automated identification of
potential avalanche release areas was developed. It overcomes some of the
limitations of previous tools, which are currently not often applied in
hazard mitigation practice. By introducing a multi-scale roughness parameter,
fine-scale topography and its attenuation under snow influence is captured.
This allows the assessment of snow influence on terrain morphology and,
consequently, potential release area size and location. The integration of a
wind shelter index enables the user to define release area scenarios as a
function of the prevailing wind direction or single storm events. A case
study illustrates the practical usefulness of this approach for the
definition of release area scenarios under varying snow cover and wind
conditions. A validation with historical data demonstrated an improved
estimation of avalanche release areas. Our method outperforms a slope-based
approach, in particular for more frequent avalanches; however, the
application of the algorithm as a forecasting tool remains limited, as
snowpack stability is not integrated. Future research activity should
therefore focus on the coupling of the algorithm with snowpack conditions.
| Reference Key |
veitinger2016naturalpotential
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|---|---|
| Authors | ;J. Veitinger;R. S. Purves;B. Sovilla |
| Journal | anziam journal |
| Year | 2016 |
| DOI |
10.5194/nhess-16-2211-2016
|
| URL | |
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