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*''i'' = Intensity of design storm in mm/hr
*''i'' = Intensity of design storm in mm/hr
*''f''' = [[design infiltration rate]] in mm/hr
*''f''' = [[design infiltration rate]] in mm/hr
*''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)  
*''R'' = Ratio of catchment area (''A<sub>c</sub>'') to BMP footprint area (A<sub>p</sub>).
*''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>'' = Catchment area in m<sup>2</sup>
*''d<sub>T</sub>'' = Total depth of the infiltration practice in m.}}
*''d<sub>T</sub>'' = Total depth of the infiltration practice in m.}}


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