Kompressionstests etc.

**patrick** · 08.01.2010, 17:46

http://www.trigs.eu/wp-content/deliverable_441.pdf

**patrick** · 08.01.2010, 18:11

Winkler, Kurt, Schweizer, Jürgen(2009): comparison of snow stability tests: extended column test, rutschblock test and compression test, in: Cold Regions Science and Technology 59, 2-3, S.217-226.

Gekürzte Zusammenfassung:

6. Conclusions
We compared various stability tests and indicators of snow instability in particular to assess the performance of the extended column test (ECT) that has recently been developed by Simenhois and Birkeland (2006, 2007). The data contained 146 sets of various tests performed side by side on potential avalanche slopes. They were collected above tree line in the Swiss Alps during the winter of 2007â€“2008.Based on our limited dataset we have shown that the ECT was able to well differentiate stable from unstable slopes. By reducing the number of loading taps to 21, the number of false alarms was slightly reduced, so that the speci ï¬ city and the sensitivity was 82% and 83%, respectively. This means that the portion of false alarms and false stable prediction was similar. The performance was clearly better than for the CT, which was bothered with a low speci ï¬ city. The unweighted average accuracy for the ECT was about 80%, comparable to the performance of the RB test.