Standing a few paces from the tree I use a Suunto aligned visually for rough
average angle. For more accuracy a plumb line is good provided the reference
points are secure. If a building is handy in the line of sight to the angle
of lean then a piece of tracing paper or acetate placed into the corner of a
window allows for the edge of the trunk to be drawn onto it. Provided that
the paper/acetate is stored flat and the position of the eye is noted, this
provides as remarkably accurate comparative record. I tend to suggest it to
householders who are concerned about leaning trees, but it has more
evidential use.
Jim
-----Original Message-----
From: Luke Steer [mailto:luketreescapes@xxxxxxxxxxx.com]
Sent: 10 February 2012 16:58
To: UK Tree Care
Subject: Re: Leaning Tree
It can but I find that there is a risk of user error creeping in which can
skew results. Its ok for a one off descriptive assessment but probably not
sufficiently accurate to be used as a benchmark.
------Original Message------
From: Ian Brewster
To: UKTC Forum
ReplyTo: UKTC Forum
Subject: RE: Leaning Tree
Sent: Feb 10, 2012 4:05 PM
A clinometer can also be similarly used ;)
-----Original Message-----
From: luke steer [mailto:luketreescapes@xxxxxxxxxxx.com]
Sent: 10 February 2012 15:53
To: UK Tree Care
Subject: RE: Leaning Tree
There is an illustration in Lonsdale 1999 showing how to use two plumb lines
to monitor the angle of leaning trees. A great way to show to owners that a
tree isn't progressively leaning more and more over time. It also provides
evidence that can be presented to an LPA to show when a protected tree is
increasingly leaning.
Best wishes
Luke
http://www.arun.gov.uk
NLPG UPRN 100062237016
DX 57406 Littlehampton
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Regards
Luke Steer
Chartered Arboriculturist
Treescapes Consultancy Ltd.
Tel: 015394 34698
Mobile: 07734 113964
www.treescapesconsultancy.co.uk
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