[CANUFNET] Relationship DBH/canopy width

[Peter Shields]

‎Hi Darren,
I too have been thinking about this! I have been applying the CRZ root protection formula type thought process to this. With a‎ 12:1 CRZ protection distance to give you the distance to stay away from trees; using a 24:1 and calculating area,  will give a real rough estimate.
Using this very rough estimate, and given our 17,000 Ash trees (streets and manicured parks) we ‎lost roughly 0.4km2 or 41 ha of canopy due to EAB here in Markham.
This does not apply to ‎woodlot trees of course.
As a tool that has some way to quantify high numbers, this may be a good Avenue to talk to the higher ups without paying for constantly updating aerials.

Just a thought still...

Peter‎ Shields
Forestry, City of Markham

Sent from my BlackBerry 10 smartphone on the Rogers network.
From: Darren Platakis
Sent: Tuesday, June 28, 2016 11:01 AM
To: Canadian Urban Forest Network
Reply To: Canadian Urban Forest Network
Subject: [CANUFNET] Relationship DBH/canopy width


Hello everyone,

Is anyone aware of information or a chart of some sort that indicates the relationship between DBH and canopy width for various tree species?

Eg,

Sugar maple with diameter "x" on average, has a canopy width of "y".

I understand that this is a very over generalized question and there are multiple variables involved. I was hoping that there might be something akin to a trigonometry table available somewhere.

I'm looking to perform some canopy analysis and would like to create buffers representing canopy width for different tree species based on their diameters.

Any links would be greatly appreciated.


Best Regards,

Darren Platakis
(H)BSc. Geog., GIS (PG), FRCGS
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