DRRR Flashcards
What is a HAZARD
HAZARD is a threat. A future source
of danger.
A hazard is any source of potential
damage, harm or adverse health effects on
something or someone.
Environmental events become hazards
once they (blank) and/or the environment adversely.
once they threaten to affect society
It is the (blank) of the hazard event that causes the harm.
physical parameter
A physical event, such as a volcanic
eruption, that does not affect human
beings is a (blank) but not a (blank)
natural phenomenon and natural hazard.
There are threemain types of HAZARDS.
- Natural Hazard
- Manmade Hazard
- Quasi-natural Hazard
such as earthquakes or floods from purely natural processes in the environment
Natural hazard
such as accidental release of chemicals or
nuclear power plant.
Technological or Man-made hazard
this type of hazard (man-made) arise
directly as a result of human activities
such as smog or desertification arise through the interaction of natural process & human activity.
Quasi-natural hazards
NATURAL HAZARDS is subdivided into three
types.
- Geological Hazard
- Hydro-meteorological Hazard
- Biological Hazard
geo” meaning earth) pertains to the hazards which are caused by natural processes or processes which originates from the solid earth geosphere.
Geological Hazard
example of Geological Hazard
Earthquake & Volcanic Eruption
(“hydro” meaning water & “meteoros” meaning sky) pertains to the type of hazard which are
caused bya process or phenomenon of atmospheric, hydrological or oceanographic
nature
Hydro-meteorological Hazard
example of Hydro-meteorological Hazard
Typhoon, Storm-surge
(“bio” meaning life) pertains to the type of hazard which is caused by a process or phenomenon of organic origin or conveyed by biological vectors/ agents, including exposure to pathogenic microorganisms, toxins and bioactive substances
Biological hazard
example of Biological hazard
Airborne pathogens such as
common cold
what is a DISASTER?
serious disruption of the functioning of a
community or a society.
A (BLANK) occurs when a hazard
impacts on vulnerable people.
disaster
What is disaster risk?
exposure to natural or man-made hazard x
vulnerability
Disasters are often described as a result of the combination of: (3 points)
I. The exposure to a hazard;
II. The conditions of vulnerability that are present, and;
III. Insufficient capacity or measures to reduce or cope with the potential negative consequences.
What is an EARTHQUAKE?
a sudden and violent shaking of the ground, sometimes causing great destruction, as a result of movements within the earth’s crust or volcanic action.
is caused by a sudden slip on a fault.
Earthquake
Earthquake-related Hazards (5)
I. Ground Shaking
II. Ground Rupture
III.Tsunami
IV.Liquefaction
V. Earthquake-induced Landslide
This is a disruptive up-down sideways
movement or motion experienced during
earthquake.
Ground Shaking
This is a displacement on the ground due to
movement of fault
Ground Rupture