xpdrainage 2016 Help Documentation XDH2016v1

Filtration Control represents a flow through a filter bed.

The following equation is used:


Q = Discharge

A = Area

K = Permeability Coefficient / Safety Factor

d = Filter depth

h = Water depth


Filtration: 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.


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