Rainfall thresholds and flood warning: an operative case study
| Autor: | Valeria Montesarchio, Francesco Napolitano, Federico Lombardo |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
lcsh:GE1-350
Hydrology Flood warning Meteorology Flood myth Hydrological modelling lcsh:QE1-996.5 lcsh:Geography. Anthropology. Recreation Structural basin lcsh:TD1-1066 Constant false alarm rate lcsh:Geology lcsh:G Hit rate General Earth and Planetary Sciences Environmental science Precipitation lcsh:Environmental technology. Sanitary engineering lcsh:Environmental sciences Reliability (statistics) |
| Zdroj: | Scopus-Elsevier Natural Hazards and Earth System Sciences, Vol 9, Iss 1, Pp 135-144 (2009) |
| ISSN: | 1684-9981 |
| DOI: | 10.5194/nhess-9-135-2009 |
| Popis: | An operative methodology for rainfall thresholds definition is illustrated, in order to provide at critical river section optimal flood warnings. Threshold overcoming could produce a critical situation in river sites exposed to alluvial risk and trigger the prevention and emergency system alert. The procedure for the definition of critical rainfall threshold values is based both on the quantitative precipitation observed and the hydrological response of the basin. Thresholds values specify the precipitation amount for a given duration that generates a critical discharge in a given cross section and are estimated by hydrological modelling for several scenarios (e.g.: modifying the soil moisture conditions). Some preliminary results, in terms of reliability analysis (presence of false alarms and missed alarms, evaluated using indicators like hit rate and false alarm rate) for the case study of Mignone River are presented. |
| Databáze: | OpenAIRE |
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