Resource Security - Water (AQA A-Level Geography): Flashcards
📚Flashcards
Practise the cards
10 cards from this deck
ShowHide
Practise the cards
10 cards from this deck
Water stress threshold (m³ per person per year)
Water stress threshold (m³ per person per year)
Less than 1,700 m³ per person per year
Regions with extremely high water stress (>80% withdrawal)
Regions with extremely high water stress (>80% withdrawal)
North Africa, Middle East, Central Asia, parts of South Asia
Two ways water stress deteriorates freshwater supplies
Two ways water stress deteriorates freshwater supplies
Quantity issues (over-extraction) & quality issues (pollution)
Four physical factors affecting water availability
Four physical factors affecting water availability
Rainfall, surface water bodies, low evaporation, geology
Effect of over-abstraction on river pollutants
Effect of over-abstraction on river pollutants
Concentrates existing pollutants, worsening water quality
Ideal reservoir topography
Ideal reservoir topography
Long, narrow valley basin with steep sides
Aquifer definition
Aquifer definition
A layer of rock that holds groundwater underground
Porosity in aquifer rocks
Porosity in aquifer rocks
Proportion of rock which is 'space' and can hold fluids
Over-abstraction from aquifers occurs when
Over-abstraction from aquifers occurs when
Extraction rate exceeds recharge rate
Saltwater incursion in coastal aquifers caused by
Saltwater incursion in coastal aquifers caused by
Over-abstraction lowering groundwater levels