this lesson discuess about causes of natural hazards, impacts of natural hazards, process of naural disaster and types of natural hazards based of different reasons

1. Natural Hazards
Mr. Yonas Gemeda
September 2019
Addis Ababa

2. Learning outcomes
 At the end of this lesson , you will be able to:
Describe different types of natural hazards
Explain the cause and global distribution of these natural
hazards, and relate them to the Earth’s structure
Explain the impacts on people and the environment
Explain different strategies for managing these natural
hazards

3. What does natural hazard mean?
A natural hazard is a physical event
that has a potential to cause loss of life
or injury and damage property and
infrastructure.

4. Time
 They can be short term events that last just
a few minutes or long term events that can
happen several years.

5. Classification
 Natural hazards can be classified in a number of
different ways. The most common classification is based
on the cause of the hazard, including:
 Geological hazard
 example : earthquake and volcanic eruption
 Climatic hazard
 example : droughts, tropical cyclone and floods

6. Cont’d
 Natural hazard can also classified are based on
the :
 Magnitude or intensity of the event
 Speed at which the event takes place
 Duration of the event
 Frequency of the event

7. Natural Disaster
 A natural disaster is when there is serious
disruption to a community caused by a
natural hazard, which can involve social,
economic and environmental losses or
impacts.
 A natural disaster follows a natural hazard.

8. conditions
 The conditions to be counted as a disaster by
UN:
A report of 10 or more people killed
A report of 100 or more people affected
A state of emergency declared by the government
of the affected country
A request by the relevant national government for
international assistance.

9. Impact
 The impact of natural disaster on a community
will depend on the :
 Length of time people are exposed to the natural
hazard.
 Vulnerability of people affected
 People’s ability to cope with the effects.

10. Topic revision question
1. Define the term natural hazards.
2. Explain about the classification of natural
hazards
3. Describe the difference of natural hazards
and disasters.