Abstract: On extreme precipitation in autumn 2011 in the Liguria: meteo-climatic analysis of the-weather events and aggravating factors. The Liguria territory is frequently affected by heavy storms characterized by "flash flood" or "alluvioni lampo". Since 1970, floods associated with this type of strong phenomena have caused over 110 deaths, including over 50 in the city of Genoa. In this paper, we reconstructed the synoptical evolution In this work we reconstructed the evolution for the two synoptic weather events of 25 October and 4 November 2011 Finally, through analysis of satellite and radar animations, we could quite understand the spatio-temporal evolution of storm systems. On 25 October, the formation of an Mesoscale convective system (MCS) has caused precipitations between 300 -540 millimeters in six hours, in the area between the Val di Magra and Cinqueterre. On November 4th, a heavy storm affects the city of Genoa, where there is a precipitation of about 545 mm in less than five hours. The general morphology of the city and its urban area, the topography of the site but also the excessive urbanization has played a key role in disaster. This shows, in a Mediterranean context where that the urban vulnerability in the face of this risk, it remains important.
SUR LES PRÉCIPITATIONS EXTRÊMES DE L'AUTOMNE 2011 EN LIGURIE : ANALYSE MÉTÉO-CLIMATIQUE DES ÉVÈNEMENTS ET FACTEURS AGGRAVANTS
FAZZINI, Massimiliano;BISCI, Carlo;
2012-01-01
Abstract
Abstract: On extreme precipitation in autumn 2011 in the Liguria: meteo-climatic analysis of the-weather events and aggravating factors. The Liguria territory is frequently affected by heavy storms characterized by "flash flood" or "alluvioni lampo". Since 1970, floods associated with this type of strong phenomena have caused over 110 deaths, including over 50 in the city of Genoa. In this paper, we reconstructed the synoptical evolution In this work we reconstructed the evolution for the two synoptic weather events of 25 October and 4 November 2011 Finally, through analysis of satellite and radar animations, we could quite understand the spatio-temporal evolution of storm systems. On 25 October, the formation of an Mesoscale convective system (MCS) has caused precipitations between 300 -540 millimeters in six hours, in the area between the Val di Magra and Cinqueterre. On November 4th, a heavy storm affects the city of Genoa, where there is a precipitation of about 545 mm in less than five hours. The general morphology of the city and its urban area, the topography of the site but also the excessive urbanization has played a key role in disaster. This shows, in a Mediterranean context where that the urban vulnerability in the face of this risk, it remains important.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
