(1) ISPRA, Institute for Environmental Protection and Research, Via Curtatone, 3, 00185 Rome (2) CNR‐IAMC, Institute for Coastal Marine Environment, National Research Council, Porto di Napoli, Calata Porta di Massa, 80133 Neaples
FLASH FLOOD EVENTS ON SALERNO COAST
FLASH FLOOD EVENTS ON SALERNO COAST
(SOUTHERN TYRRHENIAN SEA)
(SOUTHERN TYRRHENIAN SEA)
Giovanni Braca (1), Eliana Esposito (2), Giuseppina Monacelli (1),
Geomorphology of the area
y Little basins (max 30‐ 40 km2) y high orographic gradient from the sea level and short and steep streams y factors that have a decisive influence on the occurrence of flash floodsRecurrence and seasonality of events
y More than 100 relevant events from 16th century, 7 of
The most intense event
Rain gauge of SALERNO 25-26 october 1954 evento 0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0 80.0 90.0 100.0 110.0 120.0 130.0 140.0 150.0 160.0 25/10/54 1 4.00 25/10/54 1 5.00 25/10/54 1 6.00 25/10/54 1 7.00 25/10/5 4 18.00 25/10/5 4 19.00 25/10/54 2 0.00 25/10/54 2 1.00 25/10/5 4 22.0 0 25/10/5 4 23.0 0 26/10 /54 0. 00 26/10 /54 1. 00 26/10 /54 2. 00 26 /10/54 3. 00 26 /10/54 4. 00 26 /10/54 5. 00 26/10 /54 6. 00 Data e ora h o u rly r a in fa ll d e p th [ m m /o ra] 0.0 100.0 200.0 300.0 400.0 500.0 600.0 700.0 800.0 cu m u lat ive r a in fa ll d e p th [ m m ]
hourly rainfall depth cumulative rainfall depth
y Total 504 mm during
about 11 hours
y Max 150 mm/h
October 25‐26 1954 Salerno flash flood
Risk map of Bonea torrent
Risk map of Ragina Major stream
Today
