From field data to numerical modeling: evaluating simplified physical models for assessing pyroclastic density current hazard at Somma-Vesuvio (Italy).

Tadini A., Neri A., Cioni R., Bevilacqua A., Esposti Ongaro T.
  Venerdì 30/09   09:00 - 12:00   Edificio Psicologia 2 - Aula 2A   IV - Geofisica, Fisica dell'ambiente
Pyroclastic Density Currents (PDC) are one of the main sources of hazard from explosive eruptions. Despite the fact that such processes are still poorly understood, there is the need to quantitatively assess their hazard with the aim to produce reliable eruptive scenarios and probabilistic hazard maps. Consideration of the main uncertainty sources affecting the data and the models is also needed. This study aims to evaluate the applicability and accuracy of simplified PDC flow modeling, based on empirical evidences, integral models and shallow-water approximations of the process dynamics, in reproducing field data from two eruptions of Somma-Vesuvius ($i.e.$ the AD 79 Pompeii and AD 472 "Pollena" eruptions).