sec 2 unit 5 lesson 3 floods

1. Chong Boon
Secondary School
Geography Unit
Sec 2 Unit 5
Lesson 3:
How do floods affect people living in
cities?

2. How are
communities
affected by
natural
hazards?
Inquiry
Question

3. A poem about Queensland
floods.
PG 172

4. Key Social Impacts
• The effect of an event on the well-
being of people.
• Injuries
• Spread of diseases
• Loss of lives
• Homelessness
• Disruption to clean water supply

5. Injuries, spread of diseases and
loss of lives
• People hurt by debris in floodwaters.
• Buildings may collapse and cause more
damage.
• Diseases may spread due to the
floodwaters.
• Chemical spills from sewage and
industries.
• Spread of waterborne diseases like cholera
and dysentery.
• Emotional stress.

6. Homelessness
• Floodwaters damage property.
• Houses are destroyed.
• People evacuate to emergency
shelters
•Temporary / permeant
• Hurricane Katrina victims put up in
The Astrodome Stadium in Houston.

7. Disruption to clean water
supply
•Damaged water pipes
•Sewage pipes damage
leading to contamination
•Contamination of water
supplies by dirty floodwater.
Read the case-study on
pg 175

8. Polluted water

9. Economic impacts
• The effect of an event on goods and
services produced.
• Floods halt economic activities.
• Machinery, equipment and transport
infrastructure are damaged.
• Energy supply can be disrupted.
• Large costs involved to repair
damage.

10. Damage to machinery &
equipment
• Machinery & equipment submerged
in water are damaged.
• Damage to electrical parts, flooded
motors.
• Factories unable to operate at
maximum capacity.
• Loss of Jobs.

11. Damage to transport
infrastructure
•Transport infrastructure : roads,
railways, subways, etc.
•Flooding submerges or damages
infrastructure.
•Landslides lead to greater
destruction.

12. Disruption to energy supply
• Floods can affect energy supply directly or
indirectly.
• Direct disruption
• Power lines destroyed.
• Power stations flooded.
• Indirect disruption
• Fuel unable to reach consumers
• Trucks cannot supply gasoline / LPG

13. Flooding in Thailand

14. Summary
•What are the social
impacts of floods?
•What are the
economic impacts of
floods?

15. Group Exercise
Time!
Take a look at the
data that you have
been issued.
Discuss and Answer
the questions.

16. Readthearticlebelow.
Underlinethesocialimpactsofthefloodinblue
Underlinetheeconomicimpactsofthefloodinred.
TEAM Members

17. Foreachimpact,describehowitmayhavebeenaffectedbythedisruptiontoenergysupplycaused
bythefloodsinThailand(2011).
Oneimpacthasbeendoneforyouasareference.
Impact Best estimate
(in millions of US
dollars)
Households (buildings and contents) 400
Industries (buildings, contents &
disruption)
800
Vehicles (motor transport) 300
Utilities (electricity, gas, water) 200
Communications (rail, road, telecom) 300
Communications
• No energy, no
streetlamps / traffic
signals.
• No power for subways.
• Roads damaged by
floodwaters.
• Telecommunication
lines damaged, no
telephone networks.
• No energy, mobile
devices unable to be
charged.
UtilitiesVehiclesIndustriesHouseholds