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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 (English)In: Natural hazards and earth system sciences, ISSN 1561-8633, E-ISSN 1684-9981, Vol. 7, p. 2061-2074Article in journal (Refereed) 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.

Place, publisher, year, edition, pages
2012. Vol. 7, p. 2061-2074
National Category
Oceanography, Hydrology and Water Resources
Identifiers
URN: urn:nbn:se:uu:diva-401007DOI: 10.5194/nhess-11-2061-2011ISI: 000293266300023OAI: oai:DiVA.org:uu-401007DiVA, id: diva2:1382702
Available from: 2020-01-03 Created: 2020-01-03 Last updated: 2020-01-08Bibliographically approved

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Ridolfi, Elena

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