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| Titel |
Integrating point glacier mass balance observations into hydrologic model identification |
| VerfasserIn |
B. Schaefli, M. Huss |
| 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. 4 ; Nr. 15, no. 4 (2011-04-14), S.1227-1241 |
| Datensatznummer |
250012748
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| Publikation (Nr.) |
 copernicus.org/hess-15-1227-2011.pdf |
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| Zusammenfassung |
The hydrology of high mountainous catchments is often predicted with
conceptual precipitation-discharge models that simulate the snow accumulation
and ablation behavior of a very complex environment using as only input
temperature and precipitation. It is hereby often assumed that some
glacier-wide annual balance estimates, in addition to observed discharge, are
sufficient to reliably calibrate such a model. Based on observed data from
Rhonegletscher (Switzerland), we show in this paper that information on the
seasonal mass balance is a pre-requisite for model calibration. And we
present a simple, but promising methodology to include point mass balance
observations into a systematic calibration process.
The application of this methodology to the Rhonegletscher catchment
illustrates that even small samples of point observations do contain
extractable information for model calibration. The reproduction of these
observed seasonal mass balance data requires, however, a model structure
modification, in particular seasonal lapse rates and a separate snow
accumulation and rainfall correction factor.
This paper shows that a simple conceptual model can be a valuable tool to
project the behavior of a glacier catchment but only if there is enough
seasonal information to constrain the parameters that directly affect the
water mass balance. The presented multi-signal model identification framework
and the simple method to calibrate a semi-lumped model on point observations
has potential for application in other modeling contexts. |
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