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| Titel |
The relevance of glacier melt in the water cycle of the Alps: the example of Austria |
| VerfasserIn |
G. R. Koboltschnig, W. Schöner |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 15, no. 6 ; Nr. 15, no. 6 (2011-06-29), S.2039-2048 |
| Datensatznummer |
250012868
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| Publikation (Nr.) |
 copernicus.org/hess-15-2039-2011.pdf |
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| Zusammenfassung |
| This paper quantifies the contribution of glacier melt to river runoff from
compilation and statistical interpretation of data from available studies
based on observations or glacio- hydrological modelling for the region of
Austria (Austrian Salzach and Inn river basin). A logarithmic fit between
the glacier melt contribution and the relative glacierized area was found
not only for the long-term mean glacier contributions but also for the
glacier melt contribution during the extreme hot an dry summer of 2003.
Interestingly, the mean contributions of glacier melt to river runoff do not
exceed 15 % for both river catchments and are uncorrelated to
glacierization for glacierization values >10 %. This finding, however,
has to be seen in the light of the general precipitation increase with
altitude for the study region which levels out the increase of absolute melt
with glacierization thus resulting in the rather constant value of glacier
melt contribution. In order to qualitatively proof this finding another
approach has been applied by calculating the quotient qA03 of the mean
monthly August runoff in 2003 and the long-term mean August runoff for 38
gauging stations in Austria. The extreme summer 2003 was worth to be
analysed as from the meteorological and glaciological point of view an
extraordinary situation was observed. During June and July nearly the entire
snow-cover melted and during August mainly bare ice melt of glaciers
contributed to runoff. The qA03 quotients were calculated between 0.32
for a non-glacierized and 2.0 for a highly glacierized catchment. Using the
results of this study the mean and maximum possible glacier melt
contribution of catchments can be estimated based on the relative
glacierized area. It can also be shown that the found correlation of
glacierized area and glacier melt contribution is applicable for the Drau
basin where yet no results of modelled glacier melt contributions are
available. |
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