After some anecdotal advice I have planted a 3 meter high Weeping Willow
meters from the edge of a heavily lined lake. The lining of the lake is
industrial grade, i.e. approx 25 microns thick.
The roots of the tree
be constantly wet and receiving a constant trickle from underground
reticulation. I'm told that the hair like growing roots at the ends of
roots will eventually hit the liner and turn away.
Are you able to
Obviously I'm hoping that I do not need to transplant.
roots may grow alongside it, but as the roots thicken in diameter they may
exert enough pressure on the liner to distort, break or tear it.
I suggest moving the tree further away, but, being a willow, it will
probably find its way to the liner in short order.
My recommendation is to
contact a local arborist knowledgeable in these matters and ask his or her
advice. I know there are many members of the International Society of
Arboriculture in Australia, so you should be able to find someone who can