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==Determine the effective infiltration coefficient==
 
==Determine the effective infiltration coefficient==
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Determine the I/P ratio:
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:<math>R=\frac{A_{c}}{A_{p}}</math>
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{{Plainlist|1= Where:
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*''R'' = Ratio of catchment area (''A<sub>c</sub>'') to BMP footprint area (A<sub>p</sub>) syn. I/P ratio. 
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*''A<sub>p</sub>'' = Area of the infiltration practice in m<sup>2</sup>
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*''A<sub>c</sub>'' = Catchment area in m<sup>2</sup>}}
    
:<math>q'=\frac{q}{SCF}</math>
 
:<math>q'=\frac{q}{SCF}</math>
  −
:<math>R=\frac{A_{c}}{A_{p}}</math>
       
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