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| Titel |
Static and dynamic calibration of radar data for hydrological use |
| VerfasserIn |
S. J. Wood, D. A. Jones, R. J. Moore |
| 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 ; 4, no. 4 ; Nr. 4, no. 4, S.545-554 |
| Datensatznummer |
250001878
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| Publikation (Nr.) |
 copernicus.org/hess-4-545-2000.pdf |
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| Zusammenfassung |
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HYREX dense raingauge network over the Brue catchment in Somerset, England is
used to explore the accuracy of calibrated (raingauge-adjusted) weather radar
data. Calibration is restricted to the use of any single gauge within the
catchment so as to simulate the conditions in a typical rainfall monitoring
network. Combination of a single gauge and a radar estimate is used to obtain
calibrated radar estimates, with the "calibration factor" varying
dynamically from one time-frame to the next. Comparing this dynamic calibration
with a static (long-term) calibration factor indicates the distance from a gauge
over which the dynamic calibration is useful. A tapered calibration factor is
implemented which behaves in the same way as the raw dynamic calibration at
short distances, tending towards the static calibration factor at larger
distances. This hybrid approach outperforms raingauge, uncalibrated radar, and
statically-calibrated radar estimates of rainfall for the majority of raingauges
in the catchment. The results provide valuable guidance on the density of
raingauge network to employ in combination with a weather radar for flood
estimation and forecasting.
Keywords: radar, raingauge, calibration, rainfall, accuracy |
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