UKTC Archive

Re: Water Demand of Photinia

Subject: Re: Water Demand of Photinia
From: Bill Anderson
Date: Jan 08 2021 09:38:54
I don't care for the term "water demand" either Wayne. (It's got overtones
of walking into a bar and demanding drink) but the UK's National House
Building Council (who can be looked upon as an insurance broker more than a
statutory body) produce tables into which tree species can be inputted,
along with soil type and likely maximum height of the tree to produce a
recommended foundation depth. Tree species are categorised into high,
moderate, or low water demanders, which influences the foundation depth.
The level of water demand was determined through various surveys, starting
at Kew Gardens I think. I don't think there's any laboratory science in the
classification, but I think most of us would accept the categorisations at
face value. The guy who did a lot of work on this (for the NHBC) is a
well-respected member of our fraternity, and it's a sufficiently
uncontentious area for me to not spend too much time worrying about it.
Hope this helps.
Bill.

On Thu, 7 Jan 2021 at 21:13, Wayne Tyson <wt750mv@xxxxxx.com> wrote:

Upon what scholarly/scientific evidence doth the term, "water demand" rest?
Or upon what does it?

WT

On Wed, Jan 6, 2021 at 11:27 AM willross583@xxxxxxxxxxx.com <
uktc@xxxxxx.tree-care.info> wrote:

All,

     Has anyone got an idea of the water demand for Photina is it High ,
medium or low ?, an acquaintance of someone I know built a structure
without
PP and now has to go for retrospective and the building inspector has
been
asking questions as the building is within a couple of m of next doors
shrubs and a Birch as it is apparently on clay there may be a problem.



Will




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