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Created page with "Practices which infiltrate surface runoff through an engineered soil or filter media, and discharge through an underdrain include stormwater planters and some forms of b..."
Practices which infiltrate surface runoff through an engineered soil or filter media, and discharge through an underdrain include [[stormwater planters]] and some forms of [[bioretention]].
The maximum flow rate from the BMP may be limited by the hydraulic conductivity of the mmedium, or by the properties of the perforated [[pipe]].
The maximum flow rate through a bed of filer media (''Q<sub>max<max>'') may be calculated:
<math>Q_{max}=3.6 \times 10^{-3}\times K_{m}\times A_{p}\times \left (\frac{d_{pd}+d_{m}}{d_{m}} \right )</math>
{{Plainlist|1=Where:
*''K<sub>m</sub>''' is the hydraulic condcuvitiy of the filter media (mm/hr),
*''Aand
<math>Q_{p} = A_{p}\times K_{sat}\times </math>
{{Plainlist|1=Where:
*''K<sub>sat</sub>'' is the saturated hydraulic conductivity of the filter media (mm/hr), and
*''A<sub>p</sub>'' is the area of the practice (m<sup>2</sup>).}}
The maximum flow rate from the BMP may be limited by the hydraulic conductivity of the mmedium, or by the properties of the perforated [[pipe]].
The maximum flow rate through a bed of filer media (''Q<sub>max<max>'') may be calculated:
<math>Q_{max}=3.6 \times 10^{-3}\times K_{m}\times A_{p}\times \left (\frac{d_{pd}+d_{m}}{d_{m}} \right )</math>
{{Plainlist|1=Where:
*''K<sub>m</sub>''' is the hydraulic condcuvitiy of the filter media (mm/hr),
*''Aand
<math>Q_{p} = A_{p}\times K_{sat}\times </math>
{{Plainlist|1=Where:
*''K<sub>sat</sub>'' is the saturated hydraulic conductivity of the filter media (mm/hr), and
*''A<sub>p</sub>'' is the area of the practice (m<sup>2</sup>).}}