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| *Treating runoff collected from nearby impervious surfaces}} | | *Treating runoff collected from nearby impervious surfaces}} |
| '''The fundamental components of a bioretention cell are:''' | | '''The fundamental components of a bioretention cell are:''' |
| *A surface ponding area | | *a surface ponding area |
| *A 'filter bed' containing a [[Bioretention: Filter media| filter media]] | | *a 'filter bed' containing a [[Bioretention: Filter media| filter media]] |
| *A water storage layer of [[reservoir aggregate]] | | *a water storage layer of [[reservoir aggregate]] |
| *[[Plant lists|plants]], and | | *[[Plant lists|plants]], and |
| *a finishing surface layer (e.g. [[mulch]] and/or [[stone]]) | | *a finishing surface layer (e.g. [[mulch]] and/or [[stone]]) |
| '''Additional components may include:''' | | '''Additional components may include:''' |
| *An [[underdrain]] to redistribute or remove excess water | | *an [[underdrain]] to redistribute or remove excess water |
| *Soil [[additives]] intended to enhance nutrient and related water quality pollutant removal | | *soil [[additives]] intended to enhance nutrient and related water quality pollutant removal |
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| ==Planning considerations== | | ==Planning considerations== |