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Unit 1 Dynamic Planet Revision. Topic 4: Waterworld. 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

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Unit 1 dynamic planet revision

Unit 1 Dynamic Planet Revision

Topic 4: Waterworld


What you need to know
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


The hydrological cycle
The Hydrological Cycle

  • As you watch the clips, write down at least 3 key words from each clip.

  • Clip links:

  • http://www.bbc.co.uk/learningzone/clips/the-water-cycle/2148.html

  • http://www.bbc.co.uk/learningzone/clips/the-hydrological-cycle/406.html


Which words did you get
Which words did you get?

  • Precipitation

  • Evaporation

  • Interception

  • Surface runoff

  • Percolation

  • Throughflow

  • Infiltration

  • Groundwater flow

  • Storage

  • Evaporate

  • Water vapour

  • Condenses

  • Droplets


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)


Possible answers for 2 marks you need 2 correct statements
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


Comparing climates
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?


Reasons for an unreliable water supply
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?


You must know the difference
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


Economic water scarcity case study the sahel
Economic Water Scarcity Case Study: The Sahel

Where?

Write the title

and describe

the location

of the Sahel.



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

  • http://www.bbc.co.uk/learningzone/clips/expansion-of-the-sahara-desert/1500.html

  • http://www.bbc.co.uk/learningzone/clips/burkina-faso-local-impact-of-desertification/4323.html



Fill in the table as you watch these clips1
Fill in the table as you watch these clips USA

  • http://www.bbc.co.uk/learningzone/clips/the-sonoran-desert-under-threat/3098.html

  • http://www.bbc.co.uk/learningzone/clips/the-sonoran-desert-over-extraction-of-water/3099.html


Practice question
Practice Question USA

  • Explain some social and economic effects of water scarcity. (4 marks)


Water management large scale example
Water Management – Large Scale Example USA

  • Large Scale: top-down project, expensive, big impacts on people, economy environment (good and bad)


Dam example katse dam lesotho
Dam example: USAKatse Dam, Lesotho

1. Watch the clip writing at least 2 advantages and 2 disadvantages.

  • http://www.bbc.co.uk/learningzone/clips/the-advantages-and-disadvantages-of-dams/539.html

    2. Are your (dis)advantages social, economic or environmental?


Water management intermediate technology example
Water Management – Intermediate Technology Example USA

  • Intermediate technology = cheap, suits the local climate, landscape people, easily repaired, local people involved.


Intermediate technology playpumps south africa
Intermediate Technology: Playpumps, South Africa USA

  • http://www.youtube.com/user/1difference#p/search/19/mAfuKPItFQw

  • What is the scheme?

  • What are its advantages and disadvantages?


Practice question1
Practice Question USA

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)


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