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Table 1

GI data table

NameInitial cost low ($/m2)Annual cost low ($/m2)Life time low (yr)Initial cost high ($/m2)Annual cost high ($/m2)Life time high (yr)Source
Tree 10.76 8.61 25 263.93 8.61 25 CNT (2007)  
Rain barrel/cistern 6.67 0.11 20 42.19 0.32 20 
Downspout disconnection 3.23 0.01 30 12.38 2.69 100 
Permeable pavement 43.06 0.06 20 141.01 2.05 50 
Curbside swale 897.71 0.16 30 4,972.92 15.61 50 
Rain garden 8.37 0.15 25 512.58 15.61 50 
Blue roof 43.06 0.00 20 261.02 0.00 20 
Green roof 129.17 1.08 25 579.21 31.11 40 
NameInitial cost low ($/m2)Annual cost low ($/m2)Life time low (yr)Initial cost high ($/m2)Annual cost high ($/m2)Life time high (yr)Source
Tree 10.76 8.61 25 263.93 8.61 25 CNT (2007)  
Rain barrel/cistern 6.67 0.11 20 42.19 0.32 20 
Downspout disconnection 3.23 0.01 30 12.38 2.69 100 
Permeable pavement 43.06 0.06 20 141.01 2.05 50 
Curbside swale 897.71 0.16 30 4,972.92 15.61 50 
Rain garden 8.37 0.15 25 512.58 15.61 50 
Blue roof 43.06 0.00 20 261.02 0.00 20 
Green roof 129.17 1.08 25 579.21 31.11 40 
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