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Line 1: The exceptions are the depth (''d<sub>T</sub>'') and practice permeable (footprint) area (''A<sub>p</sub>''), as only one of these is required to find the other.
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Before beginning the sizing calculations most of the following parameters must be known or estimated.
This article describes recommended design approaches when available space for the practice is constrained.<br>
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Note that some of these parameters are limited:
Before beginning the sizing calculations certain parameters must be known or estimated. See [[Bioretention: Sizing]] for parameter descriptions and conceptual diagram illustrating key components of bioretention practices. Note that some of these parameters are limited:
#The ''maximum'' total depth will be limited by construction practices i.e. not usually > 2 m.
#The ''maximum'' total depth will be limited by construction practices i.e. not usually > 2 m.
#The ''maximum'' total depth may be limited by the [[Infiltration| conditions underground]] e.g. the groundwater or underlying geology/infrastructure.
#The ''maximum'' total depth may be limited by the [[Infiltration| conditions underground]] e.g. the groundwater or underlying geology/infrastructure.