Water water beings everywhere. Us landfolk are just plain outta luck.

As Gideon mentioned in another post I think, there's a makeshift stream near the tree. We can assume it's there as an easy method of keeping such a massive tree hydrated.

Man made, but it's still a stream.

EDIT: I'm noticing that CardCaptor, Kuro, Berzie, and Completlie haven't posted in awhile. Anybody know why they're absent? I can bug Berzie myself, but the other three I don't have direct contact with, anybody know anything that I don't?