Land Use Changes Affect the Water Cycle (AQA A-Level Geography): Flashcards
📚Flashcards
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Practise the cards
10 cards from this deck
Plough pan
Plough pan
Compacted soil layer beneath plough zone blocking water infiltration
Terracing effect on water flow
Terracing effect on water flow
Slows water down slopes, allows infiltration, subdues hydrograph
Urbanisation impact on peak discharge
Urbanisation impact on peak discharge
Higher peak discharge due to reduced infiltration
Deforestation impact threshold (%)
Deforestation impact threshold (%)
Significant effects at 20-50% of basin deforested
Tile drainage installation depth
Tile drainage installation depth
60-120 cm below soil surface
Chalk stream groundwater source (%)
Chalk stream groundwater source (%)
Up to 95% of flow from underground aquifers
Saline intrusion
Saline intrusion
Saltwater from sea contaminating freshwater aquifers in coastal areas
Bournes
Bournes
Intermittent streams that naturally characterise chalk downlands
London Basin water table depth at peak abstraction (1960s)
London Basin water table depth at peak abstraction (1960s)
88 m below sea level
Eutrophication from agricultural drainage
Eutrophication from agricultural drainage
Nutrients drain to water causing excessive algae & plant growth