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| Titel |
Identification of glacial meltwater runoff in a karstic environment and its implication for present and future water availability |
| VerfasserIn |
D. Finger, A. Hugentobler, M. Huss, A. Voinesco, H. Wernli, D. Fischer, E. Weber, P.-Y. Jeannin, M. Kauzlaric, A. Wirz, T. Vennemann, F. Hüsler, B. Schädler, R. Weingartner |
| 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 ; 17, no. 8 ; Nr. 17, no. 8 (2013-08-20), S.3261-3277 |
| Datensatznummer |
250085914
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| Publikation (Nr.) |
 copernicus.org/hess-17-3261-2013.pdf |
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| Zusammenfassung |
| Glaciers all over the world are expected to continue to retreat due to the
global warming throughout the 21st century. Consequently, future seasonal
water availability might become scarce once glacier areas have declined
below a certain threshold affecting future water management strategies.
Particular attention should be paid to glaciers located in a karstic
environment, as parts of the meltwater can be drained by underlying karst
systems, making it difficult to assess water availability. In this study
tracer experiments, karst modeling and glacier melt modeling are combined in
order to identify flow paths in a high alpine, glacierized, karstic
environment (Glacier de la Plaine Morte, Switzerland) and to investigate
current and predict future downstream water availability. Flow paths through
the karst underground were determined with natural and fluorescent tracers.
Subsequently, geologic information and the findings from tracer experiments
were assembled in a karst model. Finally, glacier melt projections driven
with a climate scenario were performed to discuss future water availability
in the area surrounding the glacier. The results suggest that during late
summer glacier meltwater is rapidly drained through well-developed channels
at the glacier bottom to the north of the glacier, while during low flow
season meltwater enters into the karst and is drained to the south. Climate
change projections with the glacier melt model reveal that by the end of the
century glacier melt will be significantly reduced in the summer,
jeopardizing water availability in glacier-fed karst springs. |
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