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mLine 81:
Line 81:
Fit the bioretention facility into the site plan. It is necessary to have an idea of the perimeter of the facility.
→Additional calculations
==Additional calculations==
==Additional calculations==
===Drainage time (3D)==
[[file:Hydraulic radius.png|thumb|Two practice areas of 9 m<sup>2</sup>.<br>
[[file:Hydraulic radius.png|thumb|Two practice areas of 9 m<sup>2</sup>.<br>
P = 12 m (left), P = 20 m (right)]]
P = 12 m (left), P = 20 m (right)]]
<poem>
<poem>
Narrow, linear cells drain faster than round or blocky footprint geometries.
Narrow, linear cells drain faster than round or blocky footprint geometries.
Divide the area of the practice (''A<sub>p</sub>'') by the perimeter (''P'').
Divide the area of the practice (''A<sub>p</sub>'') by the perimeter (''P'').