Changes

Practices which infiltrate surface runoff through an engineered soil or [[filter media]], and discharge through an [[underdrain]] include [[stormwater planters]] and some forms of [[bioretention]].  

Practices which infiltrate surface runoff through an engineered soil or [[filter media]], and discharge through an [[underdrain]] perforated pipe include [[stormwater planters]], and partial- and no-filtration forms of [[bioretention]].  

The maximum flow rate from the BMP may be limited by the hydraulic conductivity of the medium, or by the properties of the perforated [[pipe]]. See [[Flow through pipe]] page for guidance on estimating the maximum flow rate of a perforated pipe.

The maximum flow rate from the BMP may be limited by the hydraulic conductivity of the medium, or by the properties of the perforated [[pipe]]. See [[Flow through perforated pipe]] page for guidance on estimating the maximum flow rate of a perforated pipe.

The maximum flow rate through a bed of filter media (''Q_{max, media}'', m³/s) may be calculated as:

The maximum flow rate through a bed of filter media (''Q_{max, media}'', m³/s) may be calculated as: