Natural hazards
- Created by: isobelrh
- Created on: 22-09-20 11:54
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- Natural hazards
- Atmospheric
- Drought
- Deficiency of rainfall over an extended period of time
- Can result in lack of food, famine, desertification, malnutrition, epidemics, and displacement of populations
- Wildfires
- Uncontrolled fire that burns in vegetation normally in rural areas.
- Can cause damage to forests, agriculture and buildings
- Drought
- Hydrological
- Avalanches
- Quantity of snow or ice that slides down a mountain under the force of gravity
- Happens if load on the upper snow layer is more than the forces of the mass of all the snow
- Floods
- general floods can be predicted, flash flood cannot
- Destroy houses, crops, cattle, people
- Avalanches
- Geophysical
- Landslides
- The movement of soil or rock controlled by gravity
- Difficult to estimate
- Little to no warning if the cause is an earthquake
- Some warning if it is due to heavy rain
- Prevented by monitoring systems, land use and public regulations, public awareness programs
- Tsunamis
- Caused by rapid displacement of a body of water.
- Long wavelength
- Can be caused by earthquakes, volcanic eruptions and mass movement
- Earthquakes
- Collisions of tectonic plates and build up of pressure.
- Little or no early warning
- Can cause landslides, tidal waves, and tsunamis.
- Measured by the Richter and Mercalli scale
- How to reduce damage: development of warning indicators, land-use regulations, building regulations, relocating communities, awareness programs.
- Volcanoes
- When lava and gas are discharged from a volcanic vent.
- Can cause temporary food shortages
- Landslides
- Atmospheric
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