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
snow heights (scanned and probed values) and the measured snow density behind the nets are
used. The knowledge of the spatial and temporal variable snow depth in the test site enables
also the calculation of the spatially distributed snow pressure on the snow nets.
3. RESULTS
3.1 Experimental results
The following graphs visualize the main data that has been measured in the components of the
Trumer snow net during the winter 2006/07 (for the matching of the used variables check
Figure 3 and Figure 6). The forces applied to the components of the Geobrugg net during the
same winter were much smaller. This difference is caused by a heterogeneous snow depth
distribution due to the unequal wind and geomorphological conditions within the test site. The
mean deviation of the scanned snow heights behind the two net systems represents 32 cm.
Figure 4 Tension forces in the anchors and wire ropes of the Trumer net, winter 2006/07.
44 Snow loads on defensive snow net systems