1. Unit 1 Dynamic Planet Revision
Topic 4: Waterworld

2. What you need to know The hydrological cycle
Why some areas have unreliable water supply
How too little or too much water affects people
How humans affect water quality and quantity
How climate change affects the water cycle
Large scale water management example
Intermediate technology water management example

3. The Hydrological Cycle
As you watch the clips, write down at least 3 key words from each clip.
Clip links:

4. Which words did you get? Precipitation Evaporation Evaporate
Interception
Surface runoff
Percolation
Throughflow
Infiltration
Groundwater flow
Storage
Evaporate
Water vapour
Condenses
Droplets

5. Practice Question (2 mins, 4 lines to write): The diagram shows the hydrological cycle. State how 2 processes will be affected if there is a long, hot and dry summer. (2 marks)

6. Possible answers (For 2 marks you need 2 correct statements)
There will be more evaporation
There will be less precipitation
There will be less percolation
There will be less throughflow
etc

7. Comparing climates How is rainfall shown? How is temperature shown?
Compare the climate graphs
(similarities and differences)
What biomes would you
expect to find in these
places?

8. Reasons for an unreliable water supply
In a table with “economic”, “social” and “environmental” headings, put the following statements in the correct column.
Unreliable rainfall
Increasing population (migration or natural change)
Agricultural demand (for crops etc)
Pollution from agriculture and factories
Rising living standards (more showers, dishwashers…)
Climate change affecting rainfall patterns
Ex: Which of these affects water quality rather than quantity?

9. You must know the difference:
PHYSICAL WATER SCARCITY =
Demand > availability eg SW USA
ECONOMIC WATER SCARCITY = supply available but people can’t afford to exploit them. Lack of money to build storage facilities or distribute water eg Sahel

10. Economic Water Scarcity Case Study: The Sahel
Where?
Write the title
and describe
the location
of the Sahel.

11. Draw the table: Causes of water scarcity
Impact on people/ their responses

12. Fill in the table as you watch these clips.

13. Physical Water Scarcity Case Study: The Sonoran Desert, SW USA
Why is the area facing water scarcity?
Effects of the lack of water

14. Fill in the table as you watch these clips

15. Practice Question
Explain some social and economic effects of water scarcity. (4 marks)

16. Water Management – Large Scale Example
Large Scale: top-down project, expensive, big impacts on people, economy environment (good and bad)

17. Dam example: Katse Dam, Lesotho
1. Watch the clip writing at least 2 advantages and 2 disadvantages.
2. Are your (dis)advantages social, economic or environmental?

18. Water Management – Intermediate Technology Example
Intermediate technology = cheap, suits the local climate, landscape people, easily repaired, local people involved.

19. Intermediate Technology: Playpumps, South Africa
What is the scheme?
What are its advantages and disadvantages?

20. Practice Question
a) Use the diagram to state two humans cause water scarcity through pollution. (2 marks)
b) Explain ways people can overcome water scarcity. (4 marks)