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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 |
| | | | |
| | ==Planning considerations== | | ==Planning considerations== |