Design of Integrated Bioinfiltration-Detention Urban Retrofits with Continuous Simulation Methods
Author(s)
Lucas, Bill
Griffith University Author(s)
Year published
2009
Metadata
Show full item recordAbstract
This paper presents the elements involved in the design of a bioretention planter/trench infiltration-detention system as an urban retrofit project. The system was designed to intercept all of the runoff from a synthetic 5.08mm 24-hr rainfall event. Diverted flows were conveyed into bioretention planter for treatment. The bioretention systems were fingerprinted into areas comprising 0.8% of the contributory drainage areas, with an associated stone trench comprising another 3.4%. The system was modeled using SWMM 5.0.014 continuous simulation (CS) software. Under existing conditions, over 80% of annual runoff exceeded ...
View more >This paper presents the elements involved in the design of a bioretention planter/trench infiltration-detention system as an urban retrofit project. The system was designed to intercept all of the runoff from a synthetic 5.08mm 24-hr rainfall event. Diverted flows were conveyed into bioretention planter for treatment. The bioretention systems were fingerprinted into areas comprising 0.8% of the contributory drainage areas, with an associated stone trench comprising another 3.4%. The system was modeled using SWMM 5.0.014 continuous simulation (CS) software. Under existing conditions, over 80% of annual runoff exceeded the 3.50 L-s-1-ha-1 (0.05 cfs-ac-1) threshold for initiation of combined sewer overflows (CSOs). Nearly all runoff was intercepted by the planter/trench infiltration system, and even with a soil infiltration rate of only 2.54 mm-h-1, nearly 46% was infiltrated, and less than 8% was discharged at rates that could initiate CSOs. The number of CSO events was reduced from 74 to 4, a reduction of 95%. The volume of flows exceeding the threshold decreased by over 91%.
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View more >This paper presents the elements involved in the design of a bioretention planter/trench infiltration-detention system as an urban retrofit project. The system was designed to intercept all of the runoff from a synthetic 5.08mm 24-hr rainfall event. Diverted flows were conveyed into bioretention planter for treatment. The bioretention systems were fingerprinted into areas comprising 0.8% of the contributory drainage areas, with an associated stone trench comprising another 3.4%. The system was modeled using SWMM 5.0.014 continuous simulation (CS) software. Under existing conditions, over 80% of annual runoff exceeded the 3.50 L-s-1-ha-1 (0.05 cfs-ac-1) threshold for initiation of combined sewer overflows (CSOs). Nearly all runoff was intercepted by the planter/trench infiltration system, and even with a soil infiltration rate of only 2.54 mm-h-1, nearly 46% was infiltrated, and less than 8% was discharged at rates that could initiate CSOs. The number of CSO events was reduced from 74 to 4, a reduction of 95%. The volume of flows exceeding the threshold decreased by over 91%.
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Conference Title
World Environmental and Water Resources Congress 2009