Several different options for sizing and designing bioretention are used throughout the United States.  Sizing requirements may vary by State or local municipality. 

The following pages provide brief descriptions of each method and sample computations from the TSA TOOLS Bioretention Module.  Links are provided to appropriate references. 

If you are aware of other credible or accepted sizing methods, we would like to know about it.  Click here to let us know.

RESULTS COMPARISON

The example project shown on the sample computations are for a 0.60 acre drainage area with 0.40 acres of impervious area.  Here are the the methods compare:

* Uses 30' filter bed depth, 0.30 void ration as applicable

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Send mail to bio@bioretention.com with questions or comments about this web site.
The information on this website was compiled by T.E. Scott & Associates, Inc. from various sources.

We make no guarantees or warranties to the applicability of this material to specific applications. 
Last modified: 10/23/09