Filtration Control represents a flow through a filter bed.
The following equation is used:
where
Q = Discharge
A = Area
K = Permeability Coefficient/Safety Factor
d = Filter depth
h = Water depth
Note: The analysis will consider the head based on downstream conditions.
Specification
Permeability Coefficient – The rate at which water stored in the stormwater control percolates into the filter medium within the structure.
Safety Factor – The required safety factor.
Bed Depth – The depth of the planting soil bed.
Area – The surface area of the filter bed.
Invert Level – The invert level of the outlet.