In permaculture design we are keenly interested in how water moves through a landscape, and how we can intervene in that movement to increase the duties of water in the landscape and ensure it is a positive, life and soil building presence rather than an eroding or destructive presence.

Anyways, yesterday Dan was hanging out in his backyard when he noticed a beautiful water harvesting and directing lanscape nestled within the bark of an old oak tree:

David Holmgren checking out the oak tree a few months back. Note the very productive loquat producing in heavy shade underneath the oak!