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Line 82:
→Sizing and Modelling
Bioretention facilities should be sized to accommodate runoff from approximately 5 to 20 times the footprint area of the facility. i.e. they should have an I/P ratio of 5 to 20.
Bioretention facilities should be sized to accommodate runoff from approximately 5 to 20 times the footprint area of the facility. i.e. they should have an I/P ratio of 5 to 20.
When the drainage area is too large, silt can accumulate very rapidly, overwhelm the [[pretreatment]] devices, and lead to clogging of the facility.
When the drainage area is too large, silt can accumulate very rapidly, overwhelm the [[pretreatment]] devices, and lead to clogging of the facility.
When the drainage area is relatively small compared to a bioretention facility, it can make the facility unreasonably costly.
When the drainage area is relatively small compared to the bioretention facility, it can make the facility unreasonably costly.
*'''[[Bioretention: Sizing| Sizing]]'''
*'''[[Bioretention: Sizing| Sizing]]'''
*'''[[Bioretention: TTT| Modelling]]'''
*'''[[Bioretention: TTT| Modelling]]'''