Expected Learning:
To learn about:
- different types of flooding
- what causes flooding
- climate change
- effects of climate change and
- why some places flood more than others .
Water Fun Facts:
• Water covers 70% of the Earth’s surface, including
lakes, oceans, seas, rivers and much more.
• The existence of water is essential for life on
Earth.
• Water has three different states: liquid, solid and
gas.
• The three largest oceans on Earth are the Pacific
Ocean (largest), the Atlantic Ocean (second
largest) and the Indian Ocean (third largest).
What is a flood?
• Put your hand up and discuss words or
definitions for flooding/floods:
A simple definition of flooding is: Water where it is
not wanted. The flood may develop slowly or
quickly.
Another is: A flood results from days of heavy
rain and/or melting snows, where a body of
water overflows onto normally dry land.
What different types of floods exist?
River Flood
This is the most common type of flooding.
River floods happen when rivers and
streams cannot carry away all the extra
water that comes from heavy rain or
melting snow. The water rises in the rivers
and streams and overflows onto normally
dry land.
Flash Flood
A flash flood is a quick flood cause by
sudden thunderstorms. Huge amounts of
water fall in a short time and in cities and
towns the drains overflow and roads
become flooded.
What different types of floods exist?
Coastal Flood
Coastal floods usually occur along
coastal areas. Coastal floods occur when
hurricanes and tropical storms produce
heavy rains or giant tidal waves which
cause land to be flooded by sea water.
Urban Flood
In most of the urban area, roads are
usually paved. When heavy rain occurs,
the large amounts of water cannot be
absorbed into the ground and this leads
to urban floods.
Floods in Australia 2009
• BTN Clip:
http://www.abc.net.au/btn/story/s3007341.h
tm
What causes flooding?
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Heavy rain
Snow melting
Dam and levee failure
Soil which cannot absorb the water
Business and residential growth in flood areas
Flood Effects
• Most communities have some risk of flooding.
Effects include:
• Losing your home
• Animals losing habitats
• Drinking water becoming contaminated (dirty)
• Death (usually as a result of drowning)
• Reduced access to essential places such as:
- Schools, supermarkets, work, home, hospital etc
Your Task:
Jennings: You are to looks at a particular flood that has occurred in Australia and
present this to the class.
Rodda: You are to looks at a particular flood that has occurred somewhere around
the world and present this to the class.
Meyers: You are going to look at the positive
impacts of floods.
Tolkien: Your are going to create a
presentation which informs people of what
they should do before, during and after a
flood.