1. ‘Terrible
damage’

2. We’re going to talk about some natural disasters.
(VOLCANOES AND GEISERS; FLOODS;
LANDSLIDES)
(Now, look at the scadle model)
A natural disaster is a natural phenomenon which
could cause many deaths and damage.
Most of the natural disasters are caused by the
human being, who disturbs the environment.
Some of the most dangerous disasters might be:
tornadoes
earthquakes
hurricane
landslides
…
Landslides are going to be the central topic of my
Natural
Disasters:

4. Whatisalandslide?
It’s a geological and natural event,
a ground movement which can sweep
away a large mass of land and
anything it
finds in its path.
(Such as, rocks, trees, houses, snow(avalanches)…)

5. Whatcouldcausealandslide?
Landslides can be caused by a
lot of reasons:
On the one hand, the most common
ones are natural reasons:
- Both earthquakes and volcanic eruptions
shake the ground and cause land displacements.
- Any fragment of unstable ground could slide
because of
force of gravity.
- In areas of heavy rainfall, ground becomes mud
and it
makes possible landslides.
- Water and wind erode the basses of rocks. As a

6. On the other hand, there are artificial reasons too. Anything
man does could change so many things…
Some things (like the following ones) could be the cause of
landslides.
-An explosion caused by men in order
to get
some lands for building.
- Huge buildings, heavier than they
should
be, make the ground becomes more
unsteady and unstable.
These reasons, taken in conjunction
with some natural events, cause
landslides.

7. TypesofLandslides
Landslides
Debris flow:
Slope material, that
becomes saturated with
water, may develop into
a mud flow.
It may pick up trees,
houses, cars…
Earth flow:
A big mass of
ground slides
from an
unsteady
place to a
stable one.
Sandy flow:
Earthquakes shake
the ground and
sandy materials
flow like water.

8. Precedents
A landslide is
one of the most
difficult
geological
disasters to
predict.
Before a landslide takes place we
could notice:
-Little subdidences.
-Ground becomes soft because of
the abundance of water.
-Some cracks on the ground and
even on houses’ walls apperar due
to instability of ground.

9. CouldaLandslidecause
anotherone?
The most powerful
landslides might
cause an aftershock,
a replica of the first
one caused by the
force of the first
landslide fall.

10. Consequences
A landslide is a rather
dangerous disaster. You
could run these risks:
-Buried buildings.
-Cracked ground.
-Pull up trees.
-Torn-up street furniture.
-Earth everywhere.
-Overflowed rivers.
-And unfortunately, death people.

11. Howtopreventthem?
A landslide is quite
difficult to prevent
becuase of its difficult
forecast.
Anyway, we can take
some precautions.
Buildings’ foundiations must
be as strong as possible in
order to avoid any crack.
Buildinds mustn’t be near
hillsides or mountains.
A good practices’ system in
earthquakes and landslides.
In addition, governments and police must have a great policy to
act in these kinds of sitiuations:
Good equipments and rescue teams to rescue victims.
Evacuations plans.
Ditches can stop the adavnce of the ground movement.

12. Someexamples:
Spain, due to its slopes and climate, is a country prone to
suffer landslides.
(April, first 1986) In Spain, Granada, a huge six-million-tonne
mass started to slide. It devastated the crops, a quarry,…
Few days later, the ground movement, which was moving at one
meter per hour, arrived to the school of a village.
Police evacuate all the small town.
April, 19th the ground
movement was arriving to
Velillos river. What would
happens if this movement
arrives to the river? It could
overflow the river.
Government tried to drain the
river when it started to
become full, but it didn’t work.
Fortunately, it didn’t rain and
flow didn’t become full.

13. The most unstable areas in
Spain:

14. Febrary, 14th 2010, in Italy, Sicily,
uncessant rainfalls make a mountain
fall down.
Inhabitants just can wait for ground
movement stopping.
Two days later, a fragment of the
mountain where this village takes place
collapsed, and more than 23.000
people were evacueted by the police.
Cracked roads and destroyed houses
are the result of this great landslide.
Three days later, Mayor proclaimed state of emergency
and calamity and, just some days later, villages around
were evacueted too.

15. José
Antonio
Buzón
Carbajo.
I hope
you had
enjoyed
it!
Thank
you for
watching
!
Please,
take me
there! 
T
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