Last updated on Jun 09, 2026

Case Study → Humans Disrupting the Drainage Basin, Amazonia (Edexcel A-Level Geography): Revision Notes

📚 Revision Notes

Case Study \to Humans Disrupting the Drainage Basin, Amazonia Context ● Amazon rainforest contains 60% of the world's rainforest ● Known as the'green lungs' of the world ● Over 20% of rainforest has been destroyed at an accelerating rate in the last 50 yrs Impacts ● Used to release 20km³ of water to the atmosphere per day but this is reducing ● Deforested areas are 3°C warmer than forested areas ● Dry seasons are getting longer, with a 21% ↓ in rainfall by 2050 ● Previously 75% of intercepted water returned by EVT, now 25% The Amazon Rainforest*

Context	● Amazon rainforest contains 60% of the world's rainforest ● Known as the 'green lungs' of the world ● Over 20% of rainforest has been destroyed at an accelerating rate in the last 50 yrs
Impacts	● Used to release 20km³ of water to the atmosphere per day but this is reducing ● Deforested areas are 3°C warmer than forested areas ● Dry seasons are getting longer, with a 21% ↓ in rainfall by 2050 ● Previously 75% of intercepted water returned by EVT, now 25%

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