Mass Movement

Mass Movement

1. natural hazards

   • tornadoes
   • landslides/mudslides
   • tsunamis
   • volcanoes
   • floods
   • avalanches
   • bushfires/sandstorms

2. causes

   • human
     • deforestation
     • building/urbanisation
     • quarrying
     • added weight/stress
   • physical
     • slope angle
     • weathering
     • vegetation
     • climate/weather
     • rock types
       • e.g. clay- easily moved
   • slope failure= shear stress > shear strength

3. Event: extreme natural event- doesn't cause damage to humans.

4. Natural Hazard: event with perceived threat to humans and resources (e.g. damage to env/property.)

5. Natural Disaster: the effect (aftermath) of a hazard that has happened.

6. Management

   • drainage of water from hillsides
   • rock fall catchment fences
   • causing small landslides to prevent large buildup of stress
   • modification to slopes
     • e.g. reducing steepness to increase stability and reduce stress
   • reforestation

7. Human responses

   • dispatch of emergency services
   • aid: clean water, food, sanitation

8. Affects

   • property damage
   • loss of life and casualties
   • social unrest
   • loss of jobs and unemployment
   • homelessness
   • loss of resources
   • downfall of economy