Rainfall threshold definition using an entropy decision approach and radar data
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 thr...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2011-07-01
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| Series: | Natural Hazards and Earth System Sciences |
| Online Access: | http://www.nat-hazards-earth-syst-sci.net/11/2061/2011/nhess-11-2061-2011.pdf |
| _version_ | 1828312365491290112 |
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| author | V. Montesarchio E. Ridolfi F. Russo F. Napolitano |
| author_facet | V. Montesarchio E. Ridolfi F. Russo F. Napolitano |
| author_sort | V. Montesarchio |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-04-13T16:15:09Z |
| format | Article |
| id | doaj.art-ae29a63bf8db43598d3b85c1701ba394 |
| institution | Directory Open Access Journal |
| issn | 1561-8633 1684-9981 |
| language | English |
| last_indexed | 2024-04-13T16:15:09Z |
| publishDate | 2011-07-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Natural Hazards and Earth System Sciences |
| spelling | doaj.art-ae29a63bf8db43598d3b85c1701ba3942022-12-22T02:40:06ZengCopernicus PublicationsNatural Hazards and Earth System Sciences1561-86331684-99812011-07-011172061207410.5194/nhess-11-2061-2011Rainfall threshold definition using an entropy decision approach and radar dataV. MontesarchioE. RidolfiF. RussoF. NapolitanoFlash 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.http://www.nat-hazards-earth-syst-sci.net/11/2061/2011/nhess-11-2061-2011.pdf |
| spellingShingle | V. Montesarchio E. Ridolfi F. Russo F. Napolitano Rainfall threshold definition using an entropy decision approach and radar data Natural Hazards and Earth System Sciences |
| title | Rainfall threshold definition using an entropy decision approach and radar data |
| title_full | Rainfall threshold definition using an entropy decision approach and radar data |
| title_fullStr | Rainfall threshold definition using an entropy decision approach and radar data |
| title_full_unstemmed | Rainfall threshold definition using an entropy decision approach and radar data |
| title_short | Rainfall threshold definition using an entropy decision approach and radar data |
| title_sort | rainfall threshold definition using an entropy decision approach and radar data |
| url | http://www.nat-hazards-earth-syst-sci.net/11/2061/2011/nhess-11-2061-2011.pdf |
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