1. Chapter 4
Water Supply

2. Fresh Water
> 2% locked in ice caps and under ground

3. The hydrological cycle
What is it?
Why is it important?
It renews fresh water so that it can be used again and again
surface runoff

4. Difference between surface runoff and infiltration
- rain water absorbs by the ground/surface
surface runoff
- can form ground water
- water can no longer be absorbed by the ground
- water flows across a surface

5. Infiltration or surface runoff?
How to annotate a photograph

6. A flood Title Location? at a road side, in a city
What are the effects of the flood?
road congestion
businesses will be affected
What is the water level as measured by your observations?
What other observations?
It is raining heavily
lots of dead leaves floating
ankle deep on the foreground
Up to the car’s bumper in the background

7. Uses Of Water

8. Uses of water consumption households hygiene amenity farming factories
Domestic
Economic
agricultural
Industrial
hygiene
amenity
farming
see page 126
factories
see page 127

10. Obvious water usage at home

11. Hidden water
7 000 litres of water ?

12. The uses of water with reference to graphs.

16. Is the data reliable? Is the data useful?

17. How to calculate water footprint of a country?
Total population divided by
Total amount of water used to produce goods and services for a person

18. !Kung Bushmen vs Singaporean Boy
Who has a higher water footprint? Why?