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34
63 rd EASTERN SNOW CONFERENCE
Newark, Delaware USA 2006
the acquisitions of validating data, with respect to logistic manner, mountainous risks and strictly
weather depending planning of field investigations.
As PREVAH does not include the redistribution of snow by wind or avalanches the spatial
distribution of the SWE cannot be matched perfectly, but the mean values of the modelled SWE
are identical to measured catchment means of the SWE. Hence, it seems that the main part of the
drifted snow originates from the simulated watershed and remains inside. An additional
conceptual module for the snow redistribution by wind and avalanches (Hartmann et al., 1999)
should be applied to the model to satisfy these claims. It seems to be obvious, that only in a very
good observed catchment area reliable simulation results of high quality can be obtained.
ACKNOWLEDGEMENTS
This ongoing research was supported by a grant from the Austrian Academy of Sciences under
the project SNOWTRANS HOE29, part of the IHP PUB (International Hydrological Program,
Prediction in Ungauged Basins). Many thanks to Markus Vollmann for the classification of the
ASTER image. The authors are grateful to all the students, colleagues and friends who helped to
carry out the exhausting field work.
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