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Geography Revision For Natural Hazards (Plate Boundaries : (Constructive…
Geography Revision For Natural Hazards
Plate Boundaries :
Constructive Plate Boundary
Conservative Plate Boundary
Destructive Plate Boundary
How Plate Boundaries Work :
Destructive : Uses a Oceanic and Continental plate, they move towards each other causing one to go under into the subduction zone. This causes Volcanoes and Earthquakes.
Constructive Plate Boundary : The 2 plates move apart from each other causing magma to rise and cause shield volcanoes or earthquakes.
Conservative Plate Boundary : The 2 plates move at opposite directions or the same direction at different speeds, The friction of the plates cause earthquakes (No Volcanoes).
Haiti Case Study
Location : Haiti, Caribbean
Conservative Plate boundary
Short and long term effects :
Short
300,000 injured
230,000 deaths
Long
9000 deaths by cholera
Contaminated water supplies
800,000 infected with cholera
52 aftershocks
New Zealand Case Study 2011
Location : Christchurch
Pacific plate subducted underneath the Indo-Australian (Conservative)
Short and Long term effects :
Short Term
Over 50% of buildings were damaged
The city's cathedral collapsed
Communication lines were destroyed
80% of water and sewage systems were severely damaged
185 people died
Long Term
Buisnesses were closed for a long time
They couldn't hold 5 Rugby World Cup matches
The government declared a state of national emergency which stayed in force until April 30 2011
Schools were closed for 2 weeks
Impacts
Primary Impacks
Buildings were destroyed,
Over 217,000 dead
Secondary impacts
People were made homeless
Diseases could spread