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Rainfall threshold definition using an entropy decision approach and radar data
Sapienza University of Rome, Rome, Italy.
Sapienza University of Rome, Rome, Italy.ORCID-id: 0000-0002-4714-2511
Sapienza University of Rome.
Sapienza University of Rome.
2012 (engelsk)Inngår i: Natural hazards and earth system sciences, ISSN 1561-8633, E-ISSN 1684-9981, Vol. 7, s. 2061-2074Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

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.

sted, utgiver, år, opplag, sider
2012. Vol. 7, s. 2061-2074
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URN: urn:nbn:se:uu:diva-401007DOI: 10.5194/nhess-11-2061-2011ISI: 000293266300023OAI: oai:DiVA.org:uu-401007DiVA, id: diva2:1382702
Tilgjengelig fra: 2020-01-03 Laget: 2020-01-03 Sist oppdatert: 2020-01-08bibliografisk kontrollert

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