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Bioretention: Sizing
(view source)
Revision as of 16:24, 6 November 2017
64 bytes added
,
6 years ago
m
→Step 1
Line 11:
Line 11:
To calculate the required facility area or footprint where the depth is constrained:
To calculate the required facility area or footprint where the depth is constrained:
−
<math>A_{p}=\frac{
IiD
}{V_{R}d+q'D}</math>
+
<math>A_{p}=\frac{
A_{c}iD
}{V_{R}d+q'D}</math>
{{Plainlist|1=Where:
{{Plainlist|1=Where:
Line 19:
Line 19:
*''V<sub>R</sub>'' = Void ratio (porosity), as measured (or default to 0.35 for all aggregates)
*''V<sub>R</sub>'' = Void ratio (porosity), as measured (or default to 0.35 for all aggregates)
*''A<sub>p</sub>'' = Area of the infiltration practice in m<sup>2</sup>
*''A<sub>p</sub>'' = Area of the infiltration practice in m<sup>2</sup>
+
*''A<sub>c</sub>'' = Area of the catchment in m<sup>2</sup>
*''d'' = Depth of infiltration practice in m.}}
*''d'' = Depth of infiltration practice in m.}}
Jenny Hill
8,255
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