http://www.cnr.it/ontology/cnr/individuo/prodotto/ID45215
High resolution simulations of a flash flood near Venice (Articolo in rivista)
- Type
- Label
- High resolution simulations of a flash flood near Venice (Articolo in rivista) (literal)
- Anno
- 2009-01-01T00:00:00+01:00 (literal)
- Alternative label
Davolio S., D. Mastrangelo, M. M. Miglietta, O. Drofa, A. Buzzi and P. Malguzzi (2009)
High resolution simulations of a flash flood near Venice
in Natural hazards and earth system sciences (Print)
(literal)
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- Davolio S., D. Mastrangelo, M. M. Miglietta, O. Drofa, A. Buzzi and P. Malguzzi (literal)
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- ISI Web of Science (WOS) (literal)
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- Titolo
- High resolution simulations of a flash flood near Venice (literal)
- Abstract
- During the MAP D-PHASE (Mesoscale Alpine
Programme, Demonstration of Probabilistic Hydrological
and Atmospheric Simulation of flood Events in the Alpine region)
Operational Period (DOP, 1 June-30 November 2007)
the most intense precipitation event observed south of the
Alps occurred over the Venice Lagoon. In the early morning
of 26 September 2007, a mesoscale convective system
formed in an area of convergence between a south-easterly
low level jet flowing along the Adriatic Sea and a northeasterly
barrier-type wind south of the Alps, and was responsible
for precipitation exceeding 320mm in less than 12 h,
240mm of which in only 3 h.
The forecast rainfall fields, provided by several convection
resolving models operated daily for the D-PHASE project,
have been compared. An analysis of different aspects of the
event, such as the relevant mechanisms leading to the flood,
the main characteristics of the MCS, and an estimation of
the predictability of the episode, has been performed using
a number of high resolution, convection resolving models
(MOLOCH, WRF and MM5).
Strong sensitivity to initial and boundary conditions and to
model parameterization schemes has been found. Although
low predictability is expected due to the convective nature of
rainfall, the forecasts made more than 24 h in advance indicate
that the larger scale environment driving the dynamics of
this event played an important role in favouring the achievement
of a relatively good accuracy in the precipitation forecasts. (literal)
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