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→To calculate the required depth, where the area of the facility is constrained (3D)
==To calculate the required depth, where the area of the facility is constrained (3D)==
==To calculate the required depth, where the area of the facility is constrained (3D)==
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:
:<math>d<sub>T=a[e^{\left ( -bD \right )} -1]</math>
:<math>d=a[e^{\left ( -bD \right )} -1]</math>
Where
Where
<math>a=\frac{Ap}{x}-\frac{i I}{Ap f'}</math>
<math>a=\frac{Ap}{x}-\frac{i I}{Ap f'}</math>