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| Titel |
Rainfall threshold definition using an entropy decision approach and radar data |
| VerfasserIn |
V. Montesarchio, E. Ridolfi, F. Russo, F. Napolitano |
| 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 ; 11, no. 7 ; Nr. 11, no. 7 (2011-07-27), S.2061-2074 |
| Datensatznummer |
250009574
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| Publikation (Nr.) |
 copernicus.org/nhess-11-2061-2011.pdf |
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| Zusammenfassung |
| Flash flood events are floods characterised by a very rapid response of
basins to storms, often resulting in loss of life and property damage. Due
to the specific space-time scale of this type of flood, the lead time
available for triggering civil protection measures is typically short.
Rainfall threshold values specify the amount of precipitation for a given
duration that generates a critical discharge in a given river cross section.
If the threshold values are exceeded, it can produce a critical situation in
river sites exposed to alluvial risk. It is therefore possible to directly
compare the observed or forecasted precipitation with critical reference
values, without running online real-time forecasting systems. The focus of
this study is the Mignone River basin, located in Central Italy. The
critical rainfall threshold values are evaluated by minimising a utility
function based on the informative entropy concept and by using a simulation
approach based on radar data. The study concludes with a system performance
analysis, in terms of correctly issued warnings, false alarms and missed
alarms. |
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