[permaculture] guesstimating rainwater runoff on green roof

Paul Cereghino paul.cereghino at comcast.net
Fri Dec 14 23:46:58 EST 2007


>    Does anyone have any reference or estimate of runoff % on green roofs?
>  
>

Our local eco-building guild is working toward monitoring several 
projects... they put their proposed methods online and they dig in 
pretty deep... looking at change of discharge per rainfall event between 
green roof and control.

You could also talk more in terms of 'potential storage' and compare 
'field capacity' soil to dry soil for the volume of the roof.

http://www.ecobuilding.org/chapters/central_puget_sound/green_roof_project/monitoring



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