Changes

==Planning considerations==

==Planning considerations==

<h3>Space</h3>  

<h3>Space</h3>  

*For optimal performance bioretention facilities should receive runoff from between 5 to 20 times their own surface area.  

*For optimal performance bioretention facilities should receive runoff from between 5 to 20 times their own surface area.  

*In the conceptual design stage it is recommended to set aside approximately 10 - 20 % of a catchment area to the bioretention facility.  

*In the conceptual design stage it is recommended to set aside approximately 10 - 20 % of a catchment area to the bioretention facility.  

*Bioretention cell(s) work best when distributed so that no one facility receives runoff from more than 0.8 Ha. Although, there is a trade off to be considered regarding distributed collection and treatment against ease of maintenance.  

*Bioretention cell(s) work best when distributed so that no one facility receives runoff from more than 0.8 Ha.  

:Although, there is a trade off to be considered regarding distributed collection and treatment against ease of maintenance.  

*Bioretention can be almost any shape, from very curving, soft edges with variable depth, to angular,  hard sided and uniform depth.

*Bioretention can be almost any shape, from very curving, soft edges with variable depth, to angular,  hard sided and uniform depth.

:For ease of construction and to ensure that the vegetation has adequate space, cells should be no narrower than 0.6 m at any point.  

:For ease of construction and to ensure that the vegetation has adequate space, cells should be no narrower than 0.6 m at any point.  

:The maximum width of a facility is determined by the reach of the construction machinery, which must not be tracked into the cell.}}

:The maximum width of a facility is determined by the reach of the construction machinery, which must not be tracked into the cell.

{{:Bioretention: Context}}

{{:Bioretention: Context}}

<h3>Infiltration</h3>

<h3>Infiltration</h3>