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| Titel |
A preliminary investigation of radar rainfall estimation in the Ardennes region and a first hydrological application for the Ourthe catchment |
| VerfasserIn |
A. Berne, M. Heggeler, R. Uijlenhoet, L. Delobbe, Ph. Dierickx, M. Wit |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 5, no. 2 ; Nr. 5, no. 2 (2005-03-04), S.267-274 |
| Datensatznummer |
250002339
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| Publikation (Nr.) |
 copernicus.org/nhess-5-267-2005.pdf |
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| Zusammenfassung |
| This paper presents a first assessment of the hydrometeorological potential
of a C-band doppler weather radar recently installed by the Royal
Meteorological Institute of Belgium near the village of Wideumont in the
southern Ardennes region. An analysis of the vertical profile of
reflectivity for two contrasting rainfall events confirms the expected
differences between stratiform and convective precipitation. The mean areal
rainfall over the Ourthe catchment upstream of Tabreux estimated from the
Wideumont weather radar using the standard Marshall-Palmer reflectivity-rain
rate relation shows biases between +128% and –42% for six selected
precipitation events. For two rainfall events the radar-estimated mean areal
rainfall is applied to the gauge-calibrated (lumped) HBV-model for the
Ourthe upstream of Tabreux, resulting in a significant underestimation with
respect to the observed discharge for one event and a closer match for
another. A bootstrap analysis using the radar data reveals that the
uncertainty in the hourly discharge from the ~1600km2} catchment
associated with the sampling uncertainty of the mean areal rainfall
estimated from 10 rain gauges evenly spread over the catchment amounts to
±25% for the two events analyzed. This uncertainty is shown to be of
the same order of magnitude as that associated with the model variables
describing the initial state of the model. |
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