Urban drainage designs

Over at Edward Tufte's site, there are some interesting photos and thoughts about drainage in urban environments. The page doesn't go into "rainwater harvesting" but some of the designs and ideas could definitely be applied to permaculture designs.

You're right! In fact these methods have indeed been used for water harvesting. Check out the work done by the following:

--Watershed Management Group: http://watershedmg.org/green-streets
--Brad Lancaster: http://www.harvestingrainwater.com/

Brilliant stuff!