[CANUFNET] CANUFNET Digest, Vol 40, Issue 2 - Street Planting containers (P Murray)

[Mike James]

Murray,

I would suggest that use a Root Barrier as a container. This will allow you to size the "container" to the tree and tree pit.
It sound like the Public Works dept. plans to do some more work along the main business section of town in 7-10 years, so they are not planning for a long lived tree.  By placing a circular Root Barrier in the tree pit (36" or 36" deep). It will contain the roots.  Usually an 18" root barrier will be requested for a street tree planting to re-direct the roots down and then out of the tree pit.  In your case it sounds like they want to contain them, so a 36" or 48" root barrier will do that.

However, please ask the public works dept. what their reasoning is behind asking for containers.
Are they just trying to mitigate root damage?
Do they plan to do re-construction in 7-10 years and pull out the trees?
Or
Is 7-10 years the average tree life they have been able to achieve so that is when they expect the trees to be replace?

If this is major street renovation and there is no plan to do construction in 7-10 years then you should approach them with options to plant and grow trees that will last 30 - 40 years and not do damage to sidewalks and other hardscapes.
We have the technology and planting methods to grow mature healthy trees in urban centers with out hardscape damage.  As Urban Foresters it is incumbent on you to educate the "engineers" that trees are bio-utilities and that a mature tree in an urban center can pay back the cost of planting many times over in real economic values - rainwater/stormwater management, heat island abatement, pollution pick up, energy savings, increased real estate values...

Mike James

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Subject: CANUFNET Digest, Vol 40, Issue 2

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Today's Topics:

   1. Measuring tree cover from aerial photos (Ian Wilson)
   2. Street Planting containers (P Murray)


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Message: 1
Date: Fri, 7 Mar 2008 07:44:21 -0800
From: "Ian Wilson" <IWilson at kelowna.ca>
Subject: [CANUFNET] Measuring tree cover from aerial photos
To: <canufnet at list.web.net>,    <urbNRnet at LIST.TREELINK.ORG>
Message-ID:
        <63C8F69A3250564AAAEE162EF144217F0D0B1212 at kelexchange.city.kelowna.bc.ca>

Content-Type: text/plain; charset="us-ascii"

Hi, we recently completed a UFORE analysis for our city, using ground
plot measurements.

We want to follow up and do an aerial photo analysis and see how the
tree cover measurements compare between the aerial photos and UFORE
plots.  I was speaking with Dr. David Nowak about this recently, he
suggested that we try the "Aerial photo interpretation tool" that is on
the USFS website, at   http://www.fs.fed.us/ne/syracuse/Tools/tools.htm

However, this tool uses ArcView 3.2 which is quite old, we don't use
that software anymore.  Has anybody developed a newer tool to do this,
or a similar methodology that they could send to me?

thanks, Ian

Ian Wilson, RPF, Certified Arborist
Urban Forestry Supervisor
City of Kelowna
Parks, Recreation and Cultural Services
1359 KLO road,
Kelowna, BC  V1W 3N8
iwilson at kelowna.ca
Phone: (250) 469-8842
Fax:  (250) 862-3335

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Message: 2
Date: Sun, 9 Mar 2008 16:00:33 -0500
From: "P Murray" <pmurray5 at cogeco.ca>
Subject: [CANUFNET] Street Planting containers
To: "Can Urban Forest Net" <canufnet at list.web.net>
Cc: "Bickerton, Doug" <dbick at kos.net>
Message-ID: <000a01c88228$9dc07e40$b5a12648 at user>
Content-Type: text/plain; charset="iso-8859-1"

Hello;  Our town public works department has requested our ( the Gananoque Urban Forest Committee) assistance in implementing their task of planting trees on the main business section of town. They have resolved the criteria for the project : Trees are to be smaller, such as Japanese Liliac ; they will have a life "expectancy " of 7 to 10 years then be replaced; and they are to be planted in some form of "pot" or "liner"  that will limit lateral root growth and will facilitate easy removal. We understand that there are plastic "pots" available for this type of planting, but we don't know where to find them. Is anyone aware of this procedure, where the pots are obtained , and are there words of advice regarding this system of street planting? Peter Murray, RPF retired, Chair GUFC.
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End of CANUFNET Digest, Vol 40, Issue 2
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