thanks so much for posting this!! I had saved something like it long time back, and lost the bookmark. Brilliant thinking. This is how to do permaculture--And swimming!!!! and have a portion of the water feed the garden... and use the greywater for the pond. I was thinking about doing this for my mom's place. Now you've got me thinking stained concrete again. Remember, you can "ground"/earth through concrete, but not through wood., And now, you can do such beautiful things with concrete, outdoors and indoors, with staining, painting, impressing, enscribing,(words for Christopher and Schulze) waxing...
:-) Ah, the distinct pleasures of the armchair designer. :-)