If you have planters at the top with hanging plants, they will need many times the amount of water than plants in the ground. Not very eco-friendly. Will future generations be glad to inherit such a high maintenance structure?
wild edges said:
I can imagine a SUDs scheme where the rain water off the roof is directed through the hollow columns watering the plants on the way then gets directed into reens and on to a collection pond at ground level. Overflow the pond into a underground tank to be pumped back up onto the roof like one huge water feature.
As dangerous as it is, would Japanese Knot Weed be any use? Assuming it could be contained? (Though, there will be some legal hoops to jump through..) Thank You,Ash
http://www.knotweed-uk.com/Knotweed-and-The-Law.htm One would have hoped , that , as an architect, you'd be aware of this.