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*''d<sub>m</sub>'' is the depth of the filter media (mm).
*''d<sub>m</sub>'' is the depth of the filter media (mm).
}}
}}
===Example calculation===
<math>Q_{max}=50 mm/hr\times A_{p}\times \left (\frac{\sum d}{d_{m}} \right )\times 3.6 \times 10^{-3}</math>