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Vaiont Dam Resovoir - Coggle Diagram
Vaiont Dam Resovoir
Event
10:39 huge slab of rock 200m wide slid into reservoir
created a 100m wave which overtopped the dam
30 million cubic meters of water surged into the valley
killed 2,043 people
dam itself remained in place
Causes (physical)
Rocks were dipping down providing natural slip plane
Fault lines created the slip plane
Valley had previous slip planes that were then unstable
heavy rainfall
earthquake activity in region although this wasn't a trigger
Human Reaction (long term)
survivors moved to new village Vajont
Villages rebuily with houses and factories
used disaster to promote industry in NE italy
Survivors given start up loans
Lake kept at constant level
Causes (human)
Increased pore water pressure as the water table rose in the bedrocks as the reservoir was created
tree removal increased weathering
Site shouldn't have been choosen
Impacts(environmental)
Soil and trees removed
water course damaged
ecosystem and biodiversity damaged
Impacts (social)
2,043 people killed
Education and health facilities destroyed
Towns (Longarone) and villages destroyed
Human reaction (Short term)
Communications destroyed roads
death toll 2,043
homes destroyed
Where?
Piave river valley in the Italian alps
located in a narrow gorge below Monte Toc
When?
It was completed in 1959 and it was one of the highest dams in the world
event occurred on 9/10/1963
Warnings given:
15/09/1963 22cm slope slide so government slowly emptied dam
No warning issued to locals
Impacts (economic)
Overall cost $200 million
no water held in dam today