I recently visited Cira Green, a park in Philadelphia that's located on top of a parking garage, about 100' off the ground. The park features numerous garden beds and native trees. There are a number of challenges that come with planting trees on elevated surfaces including soil volume and mixture, wind, and a dynamic load. However, when done correctly, these green roofs can offer numerous benefits including wildlife food and habitat, storm water control, and providing the public with a nice public place to visit.
More info:
https://ciragreen.com/
https://developingresilience.uli.org/case/cira-green/
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That huge below surface cistern and the efforts to anchor the trees against wind would seem to add significantly to the cost over artificial shading structures with ranking plants for example.
I suppose it would depend on the costs and benefits which I haven’t seen quantified. But in general those things don’t provide anywhere near the benefits trees do.
That huge below surface cistern and the efforts to anchor the trees against wind would seem to add significantly to the cost over artificial shading structures with ranking plants for example.
I suppose it would depend on the costs and benefits which I haven’t seen quantified. But in general those things don’t provide anywhere near the benefits trees do.