Sources (AQA A-Level Geography): Flashcards
📚Flashcards
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Practise the cards
10 cards from this deck
Water security
Water security
Reliable access to sufficient quantities of clean water
People in absolute water scarcity by 2025
People in absolute water scarcity by 2025
1.8 billion people
Three main sources of water
Three main sources of water
Surface water, groundwater aquifers, seawater (desalination)
% of global water used by agriculture
% of global water used by agriculture
69%
Water stress threshold (m³/person/year)
Water stress threshold (m³/person/year)
Below 1,700 m³ per person annually
Over-abstraction
Over-abstraction
Reduces water volume available for other users & environment
3 quality impacts of water stress
3 quality impacts of water stress
Organic pollution, eutrophication, saltwater intrusion
4 physical factors for water availability
4 physical factors for water availability
Reliable rainfall, freshwater bodies, low evaporation, geology
Africa's agricultural water use (%)
Africa's agricultural water use (%)
82%
Reservoirs
Reservoirs
Artificial water storage created by dams across river valleys