Flash Flood, Pluvial Flood. The model has been forced with obserbed data. The simulation spatial resolution is 300m.
The simulation temporal resolution is 1h and lasts 168 hours in total:
It begins on 5th November 2013, 00UTC and ends 15th November 2013, 00UTC.
From Sunday, November 10, 2013 a deep trough of Atlantic origin has approached,
deepening, to the Italian peninsula. The cold air coming in from the Rhone door has induced
a cyclogenesis on the Ligurian Gulf; the vortex during the evening of Sunday 10 has led to the Tyrrhenian Sea south-central, then deepening during the early hours of Monday 11 along the coast.
The pluviometric event was particularly consistent with a total duration of approx
60 hours: the most intense precipitations were observed between the morning of November 10th and the
12 November 2013.
(CFD Umbria Report).
The meteoric stress has caused the increase of the hydrometric levels in the greater
part of the waterways that are located in the central-eastern part of the region, causing
flooding in different locations. (Tevere, Chiascio and Topino rivers).
The basin of the Alto-Medio Tevere is characterized by the presence of some important reservoirs
artificial, whose behavior can greatly influence the evolution of the flood wave and the
its transfer along the hydrographic network, at least for events characterized by return times
indicatively less than 50 years. These barriers are the dams of Montedoglio and Corbara sul F.
Tevere and Casanuova on F. Chiascio.
The Montedoglio dam, in the province of Arezzo, underlies a water catchment area of 276 Km 2 and has
currently a useful capacity decreased compared to the potential 168 million m 3 due to the
breakdown occurred in December 2010.
The Corbara dam, which subtends a water catchment area of 6075 Km 2, has a useful capacity of 135
millions of m 3 and a total capacity of 190 million m 3.
The Casanuova (Valfabbrica) dam on the F. Chiascio, still not fully operational as it is, underlies a
water catchment area of 471 km 2 and operates with the drain gates open at such a height
("calibrated mouth" operation) to dynamically laminate the full downstream (critical section
Petrignano of Assisi).
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