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Estimation question

How many litres of water does a large oak tree release through its leaves in one year?

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The answer

151,000 litres

About 151,000 litres, roughly 1,000 full bathtubs.

How to get there

  1. On a warm summer day a large tree releases about 800 litres (assumption)
  2. The oak has leaves for about 190 days a year (assumption)
  3. 800 × 190 ≈ 152,000 litres, so about 151,000 litres

Source: USGS, The Water Cycle: a large oak tree can transpire up to 151,000 litres per year

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