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| Titel |
Hydrological model performance and parameter estimation in the wavelet-domain |
| VerfasserIn |
B. Schaefli, E. Zehe |
| 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 ; 13, no. 10 ; Nr. 13, no. 10 (2009-10-19), S.1921-1936 |
| Datensatznummer |
250012027
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| Publikation (Nr.) |
 copernicus.org/hess-13-1921-2009.pdf |
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| Zusammenfassung |
| This paper proposes a method for rainfall-runoff model calibration
and performance analysis in the wavelet-domain by fitting the
estimated wavelet-power spectrum (a representation of the
time-varying frequency content of a time series) of a simulated
discharge series to the one of the corresponding observed time
series. As discussed in this paper, calibrating hydrological models
so as to reproduce the time-varying frequency content of the
observed signal can lead to different results than parameter
estimation in the time-domain. Therefore, wavelet-domain parameter
estimation has the potential to give new insights into model
performance and to reveal model structural deficiencies. We apply
the proposed method to synthetic case studies and a real-world
discharge modeling case study and discuss how model diagnosis can
benefit from an analysis in the wavelet-domain. The results show
that for the real-world case study of precipitation – runoff
modeling for a high alpine catchment, the calibrated discharge
simulation captures the dynamics of the observed time series better
than the results obtained through calibration in the time-domain. In
addition, the wavelet-domain performance assessment of this case
study highlights the frequencies that are not well reproduced by the
model, which gives specific indications about how to improve the
model structure. |
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