This document provides an overview of floods and flooding for educational purposes. It defines a flood as occurring when normally dry areas are covered by water for a limited time period. The document then covers various topics related to floods, including what causes floods such as heavy rain, melting snow or ice, or dams and dikes breaking. It discusses where floods can occur, including coastal areas, near streams and lakes, or low-lying flat lands. Signs of flooding and why floods are dangerous are also addressed. The goal is to educate about floods and flooding for prevention, preparedness and response.

1. PREVENTION
SECONDARY LEVEL
e-Learning for the Prevention, Preparedness and Response to Natural Disasters

2. IN THIS LESSON YOU WILL LEARN
 What is a flood
e-Learning for the Prevention, Preparedness and Response to Natural Disasters

3. IN THIS LESSON YOU WILL LEARN
 What is a flood
 Where does it come from
e-Learning for the Prevention, Preparedness and Response to Natural Disasters

4. IN THIS LESSON YOU WILL LEARN
 What is a flood
 Where does it come from
 Where can it hit
e-Learning for the Prevention, Preparedness and Response to Natural Disasters

5. IN THIS LESSON YOU WILL LEARN
 What is a flood
 Where does it come from
 Where can it hit
 What shows you that there is a flood
e-Learning for the Prevention, Preparedness and Response to Natural Disasters

6. IN THIS LESSON YOU WILL LEARN
 What is a flood
 Where does it come from
 Where can it hit
 What shows you that there is a flood
 Why is flood dangerous
e-Learning for the Prevention, Preparedness and Response to Natural Disasters

7. IN THIS LESSON YOU WILL LEARN
 What is a flood
 Where does it come from
 Where can it hit
 What shows you that there is a flood
 Why is flood dangerous
 What kind of damage does the flood cause
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8. FLOOD – WHEN NORMALLY DRY AREAS ARE
COVERED WITH WATER DURING A LIMITED
TIME PERIOD
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9. To be able to prevent
a flood, you must be
able to identify the
flood. The definition
of a flood can be a
variety of things and
the same applies to
the cause.
Image courtesy of nattavut at
FreeDigitalPhotos.net
Do you know what is the flood?

10. To be able to prevent
a flood, you must be
able to identify the
flood. The definition
of a flood can be a
variety of things and
the same applies to
the cause.
The word "flood" covers
a wide spectrum, as it
can be everything from a
flooded basement to a
more permanent flood in
connection with natural
incidents, such as a rise
in sea level, tectonic
subsidence or when
man-made structures
such as dams or dikes
break open.Image courtesy of nattavut at
FreeDigitalPhotos.net
Do you know what is the flood?

11. What is a flood?
Flooding in Europe is divided into
categories measured by the following
criteria:
Image courtesy of khuruzero at
FreeDigitalPhotos.net

12. What is a flood?
Flooding in Europe is divided into
categories measured by the following
criteria:
•The source of the flood
Image courtesy of khuruzero at
FreeDigitalPhotos.net

13. What is a flood?
Flooding in Europe is divided into
categories measured by the following
criteria:
•The source of the flood
•Geographical extent of the flooded
area
Image courtesy of khuruzero at
FreeDigitalPhotos.net

14. What is a flood?
Flooding in Europe is divided into
categories measured by the following
criteria:
•The source of the flood
•Geographical extent of the flooded
area
•Cause of the flood
Image courtesy of khuruzero at
FreeDigitalPhotos.net

15. What is a flood?
Flooding in Europe is divided into
categories measured by the following
criteria:
•The source of the flood
•Geographical extent of the flooded
area
•Cause of the flood
•Speed of the flood Image courtesy of khuruzero at
FreeDigitalPhotos.net

16. DURING THE FLOOD YOU CAN SEE THIS
PLAYGROUND UNDER WATER
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17. DURING THE FLOOD YOU CAN SEE THIS
PLAYGROUND UNDER WATER CARS FLOATING IN WATER
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18. DURING THE FLOOD YOU CAN SEE THIS
PLAYGROUND UNDER WATER CARS FLOATING IN WATER
WHOLE
HOUSES
SURROUNDED
BY WATER
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19. Sources of a flood
Heavy rain

20. Sources of a flood
Heavy rain
Flash flood

21. Sources of a flood
Heavy rain
Flash flood
Melting snow

22. Sources of a flood
Heavy rain
Flash flood
Melting snow Break on dikes

23. Sources of a flood
Earthquake under water
(tsunami)
Heavy rain
Flash flood
Melting snow Break on dikes

24. WHAT CAUSES FLOODS?
HEAVY
RAIN
AFTER HEAVY RAIN THE LAND IS
COVERED WITH WATER
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25. WHAT CAUSES FLOODS?
FLASH
FLOOD
RAPID FLOODING IN LOW AREAS
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26. WHAT CAUSES FLOODS?
MELTING
SNOW AND
ICE
RAPIDLY MELTING SNOW AND ICE CAN
FLOOD ROADS AND FIELDS
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27. WHAT CAUSES FLOODS?
BREAKING
DYKES
AND
DAMS
WATER BREAKS MAN-MADE DEFENCES
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28. WHAT CAUSES FLOODS?
TSUNAMI
EARTHQUAKES UNDER WATER CAN
CAUSE HIGH WAVES ON THE OCEAN
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29. WHERE CAN IT HIT?
HIGH RISK –
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30. WHERE CAN IT HIT?
HIGH RISK –
COASTAL AREAS
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31. WHERE CAN IT HIT?
HIGH RISK –
COASTAL AREAS
HIGH RISK – NEAR STREAMS
AND LAKES
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32. WHERE CAN IT HIT?
HIGH RISK –
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33. WHERE CAN IT HIT?
HIGH RISK – LOWLAND
AND FLAT TERRAIN
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34. WHERE CAN IT HIT?
HIGH RISK – LOWLAND
AND FLAT TERRAIN
LOW RISK – HIGH GROUND
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35. WHAT SHOWS
YOU THAT THERE
IS A FLOOD?
After and during a
severe storm and
strong winds the fallen
trees might block the
way and water floods
the area
STORMS AND STRONG WINDS
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36. WHAT SHOWS
YOU THAT THERE
IS A FLOOD?
HIGH WATER
LINE
STRONG WINDS AND HEAVY RAIN CAN
CAUSE THE WATER TO RISE
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37. 37
Flooding in lowland coastal areas can have severe consequences
such as fatalities and economic damage. The probability of
disasters from flooding in coastal areas is low and the flooding
can be alerted one or more days in advance as this type of flood
often will be a flash flood. However the flooding can hit a large
geographical area, where a large amount of people live.

38. WHAT SHOWS
YOU THAT THERE
IS A FLOOD?
STREETS AND
TOWN AREAS
UNDER
WATER
STORM AND HEAVY RAIN FILLS THE
STREETS WITH WATER
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39. WHAT SHOWS
YOU THAT THERE
IS A FLOOD?
THERE IS A
LOT OF STILL
WATER AFTER
THE STORM
DRAINS ARE FILLED AND WATER STAYS
ON THE GROUND
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40. Flooding in urban areas,
normally occurs locally after
heavy precipitation incidents.
This type of flooding can spread
to a larger scale, particularly if
there is a large area of low-
pressure. Flooding can have a
particularly severe impact in
densely populated areas.

41. WHY IS FLOODING DANGEROUS?
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42. WHY IS FLOODING DANGEROUS?
DAMAGE IN THE HOUSE – BASEMENT FILLED WITH WATER
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43. WHY IS FLOODING DANGEROUS?
https://www.youtube.com/watch?v=nMEHJPuggHQhttps://www.youtube.com/watch?v
=nMEHJPuggHQ

44. WHY IS FLOODING DANGEROUS?
IT IS DIFFICULT TO MOVE AROUND
https://www.youtube.com/watch?v=nMEHJPuggHQhttps://www.youtube.com/watch?v
=nMEHJPuggHQ

45. WHY IS FLOODING DANGEROUS?
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46. WHY IS FLOODING DANGEROUS?
WATER CAN BE POLLUTED AND HIDE OBSTACLES
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47. WHY IS FLOODING DANGEROUS?
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48. WHY IS FLOODING DANGEROUS?
BUILDINGS CAN COLLAPSE
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49. WHY IS FLOODING DANGEROUS?
e-Learning for the Prevention, Preparedness and Response to Natural Disasters

50. WHY IS FLOODING DANGEROUS?
DAMAGE TO THE NATURE – FALLEN TREES
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51. WHY IS FLOODING DANGEROUS?
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52. WHY IS FLOODING DANGEROUS?
DAMAGE TO NATURE – LANDSLIDES AND MUDSLIDES
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53. WHY IS FLOODING DANGEROUS?
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54. WHY IS FLOODING DANGEROUS?
FLOODING IN WINTER – FREEZING COLD
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55. o Floods can be caused by storms and/or heavy rain
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56. o Floods can be caused by storms and/or heavy rain
o Melting ice and snow can cause flooding
e-Learning for the Prevention, Preparedness and Response to Natural Disasters

57. o Floods can be caused by storms and/or heavy rain
o Melting ice and snow can cause flooding
o Water can break dams and defences and cause flooding
e-Learning for the Prevention, Preparedness and Response to Natural Disasters

58. o Floods can be caused by storms and/or heavy rain
o Melting ice and snow can cause flooding
o Water can break dams and defences and cause flooding
o A tsunami is a very powerful wave caused by an earthquake – they can cause
flooding of very large areas
e-Learning for the Prevention, Preparedness and Response to Natural Disasters

59. o Floods can be caused by storms and/or heavy rain
o Melting ice and snow can cause flooding
o Water can break dams and defences and cause flooding
o A tsunami is a very powerful wave caused by an earthquake – they can cause
flooding of very large areas
o Water levels can sometimes rise very quickly
e-Learning for the Prevention, Preparedness and Response to Natural Disasters

60. e-Learning for the Prevention, Preparedness and Response to Natural Disasters
o Floods can damage houses, cars and the
environment

61. e-Learning for the Prevention, Preparedness and Response to Natural Disasters
o Floods can damage houses, cars and the
environment
o Don’t walk in flood water – it can
contain dangerous obstacles

62. e-Learning for the Prevention, Preparedness and Response to Natural Disasters
o Floods can damage houses, cars and the
environment
o Don’t walk in flood water – it can
contain dangerous obstacles
o Don’t go into cold water

63. e-Learning for the Prevention, Preparedness and Response to Natural Disasters
o Floods can damage houses, cars and the
environment
o Don’t walk in flood water – it can
contain dangerous obstacles
o Don’t go into cold water
o Be careful during floods and always stay
safe!

64. YOU CAN FIND MORE INFORMATION ABOUT THE FLOOD:
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