What does it mean for a region to be in water deficit?

Its demand for water is greater than the supply available to it, so some needs go unmet and it is water insecure.

Which parts of the world tend to have the largest water surpluses?

Wet equatorial and temperate regions such as northern South America, Central Africa, northern Europe and Canada, where heavy or reliable rainfall meets a fairly small demand.

Which parts of the world tend to have the deepest water deficits?

Dry subtropical belts such as North Africa, the Middle East, western Asia and inland Australia, and any densely populated or heavily irrigated region such as northern India and the western United States.

Why can a wet country still suffer shortages in places?

Because rainfall is spread unevenly through the country and through the year, so a region or a season can fall into deficit while the national total looks comfortable.

AQA GCSE Geography 8035

Climate Change

Topic overview The evidence, causes and effects of climate change Managing climate change: mitigation and adaptation

Coastal Landscapes in the UKUK landscape option

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Ecosystems

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EnergyResource option

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FoodResource option

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Glacial Landscapes in the UKUK landscape option

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Natural Hazards

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Tropical Rainforests

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UK Physical Landscapes

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WaterResource option

Topic overview Water surplus and deficit, and why demand is rising The impacts of water insecurity Strategies to increase water supply Towards a sustainable water supply

Weather Hazards

Topic overview Global atmospheric circulation: pressure belts and surface winds Where tropical storms form, and why The structure of a tropical storm, and the effect of climate change The effects of and responses to tropical storms Reducing the effects of tropical storms Weather hazards in the UK An extreme weather event in the UK, and evidence of more extreme weather

Water

Water surplus and deficit, and why demand is rising

3 things to know
Paper 2 section C

Overview

Water security, surplus and deficit and their global pattern, why consumption rises with development and population, and how climate, geology, pollution, over-abstraction, limited infrastructure and poverty affect availability.

What you need to know

Answer each one before you reveal it.

Your recallNot started

Key term

Why does the amount of water the world uses keep climbing?

Key term

What is meant by water security?

Key term

When is an area said to have a water surplus?

Questions from this subtopic

Each one with the model answer underneath.

1
What is meant by water security?
Model answer
A country or region has enough clean, safe water to meet the needs of its people, farming and industry, both now and in the future.
2
When is an area said to have a water surplus?
Model answer
When the supply of water available to it is greater than the amount its people, farms and industries demand.
3
What does it mean for a region to be in water deficit?
Model answer
Its demand for water is greater than the supply available to it, so some needs go unmet and it is water insecure.
4
Which parts of the world tend to have the largest water surpluses?
Model answer
Wet equatorial and temperate regions such as northern South America, Central Africa, northern Europe and Canada, where heavy or reliable rainfall meets a fairly small demand.
5
Which parts of the world tend to have the deepest water deficits?
Model answer
Dry subtropical belts such as North Africa, the Middle East, western Asia and inland Australia, and any densely populated or heavily irrigated region such as northern India and the western United States.
6
Why can a wet country still suffer shortages in places?
Model answer
Because rainfall is spread unevenly through the country and through the year, so a region or a season can fall into deficit while the national total looks comfortable.

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