Originally Posted by The Mule
Would it be possible to excavate a little more on the opposite side of the pond (from the tree), place that earth at the tree's base to cover the existing roots and then put some sort of impermeable barrier down between the roots and the pond?


This may be possible, but I still think you have an issue with the source of the water which I was addressing before you made your last post.

Excerpt from Robert Crais' "The Monkey's Raincoat:"
"She took another microscopic bite of her sandwich, then pushed it away. Maybe she absorbed nutrients from her surroundings."