Question: Tree transpiration rate

Geoff Vanderkooy gvanderk at visions.UVic.CA
Fri Dec 9 15:58:40 EST 1994

Greetings everyone!

  My wife is trying to discover how much water a tree transpires during a day.
Does anyone know, or can suggest a reference she could look at?
For example, how much water does an average, 100 year-old Douglas fir transpire?
How much does this vary with weather conditions?

  She is trying to design & build an interactive computer presentation for a
non-profit nature sanctuary here.

  Thanks in advance for your help!

Geoff (gvanderk at

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