Changes

In some very constrained sites, the surface area of the BMP may be limited, in this case the required depth of cell or trench can be calculated.

In some very constrained sites, the surface area of the BMP may be limited, in this case the required depth of cell or trench can be calculated.

Note that in most cases the results of this calculation will be very similar to those of the above equation using 3D infiltration.  

Note that in most cases the results of this calculation will be very similar to those of the above equation using 3D infiltration.  

:<math>d=\frac{D\left[\left( \frac{I}{Ap} \right )i-f' \right]}{n}</math>

:<math>d=\frac{D\left[\left( \frac{Ai}{Ap} \right )i-f' \right]}{n}</math>

==To calculate the require facility area or footprint where the depth is constrained (1D)==

==To calculate the require facility area or footprint where the depth is constrained (1D)==