UKTC Archive

RE: Water Demand of Cotoneaster

Subject: RE: Water Demand of Cotoneaster
From: will ross
Date: Sep 05 2017 09:59:08
I agree with both answers in this case the site has been cleared and the 
engineer is trying to work out the so called water demand of the trees/shrubs 
that were there to design for potential  heave, in reality I agree with Jim 
as far as rooting depth and also general conditions including vitality of 
particular specimens.
Again many thanks , any further thoughts would be welcome.

Will

-----Original Message-----
From: uktc-request@xxxxxx.tree-care.info 
[mailto:uktc-request@xxxxxx.tree-care.info] On Behalf Of Liam McKarry
Sent: 05 September 2017 10:46
To: UK Tree Care
Subject: RE: Water Demand of Cotoneaster

I've always thought 'Water Demand' was a silly term.

Plants remove water from the soil, anything that can root under foundations 
can therefore remove water from clay causing it to reduce in size meaning 
that foundations will move downward. Whether it's high demand or low demand 
seems a bit arbitrary.

If differential movement has occurred where the plant is and there are roots 
beneath the foundations it's a good bet that it's either the sole cause or a 
contributing factor (in combination with other trees/shrubs nearby) to the 
clay shrinkage.



Liam McKarry
Arboricultural Officer (Planning) • Corporate and Place Services   • 
Colchester Borough Council • www.colchester.gov.uk


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-----Original Message-----
From: uktc-request@xxxxxx.tree-care.info 
[mailto:uktc-request@xxxxxx.tree-care.info] On Behalf Of Jim Quaife
Sent: 05 September 2017 10:23
To: UK Tree Care <uktc@xxxxxx.tree-care.info>
Subject: RE: Water Demand of Cotoneaster

Water demand is a term that is understood and in common usage, but the trees 
with the higher WD are generally those better able to root deeply - 
coincidence eh??
I doubt that there are any data so if you need to be definite it would have 
to be a trial hole to discover the rooting depth profile.
I know that pyracantha is a bad boy in subs, but usually when grown against 
the wall.  I have no idea about cotoneaster.
Jim

-----Original Message-----
From: uktc-request@xxxxxx.tree-care.info 
[mailto:uktc-request@xxxxxx.tree-care.info] On Behalf Of will ross
Sent: 05 September 2017 10:06
To: UK Tree Care
Subject: Water Demand of Cotoneaster

Hi,

    Does anyone have an idea of water demand for a cotoneaster, I am working 
from a third party report and the engineer is requesting further detail, the 
estimated height was 8m so I presume it was one of the large shrub/tree type 
such as waterii, also they have asked for the water demand of Pittosporum 
which I can't find. Any help would be welcome.



Will




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