UKTC Archive

Tree hazard potential assessment study Question about tree assessment apart from risk assessment

Subject: Tree hazard potential assessment study Question about tree assessment apart from risk assessment
From: Wayne Tyson
Date: Jun 01 2018 09:49:00
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This question may appear to be too elementary, but I'm serious.

Am I to believe that tree assessment is always part of risk assessment? It
appears to me that risk assessment is primarily intended to justify the
retention of a tree with significant potential for failure.

I fully agree that large old trees are treasures that should not be felled
until there is sufficient evidence to justify it. I also fully realize that
those who do this work are in a double-bind. *Theoretically*, it should be
possible to "reduce" the issue to a problem in physics, but the number of
variables seems daunting. However, in the "systems" I have seen, there
seems to be a lack of measurement and quantification and an abundance of
guesswork, professional opinion, "experience," and approximation. I
realize, too, that certainty, especially given the time dimension, is
almost impossibly out of reach. Still, it would seem that the approximation
envelope could be narrowed.

When a tree fails (all or a significant part of it falls) that has been
determined to be at "low risk" or "moderate risk" of failure, are studies
conducted to determine the causes, and is there a feedback process to
improve assessment procedures?

Wayne



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