Changes

==Key system design parameters==

==Key system design parameters==

===Types of filter media===

===Types of filter media===

Care should be taken when selecting the type of filter media used in an LID system. Two common types of [[Media filters|filter media]] used in stormwater treatment are granular media and membranes:   

Careful consideration should be given to the type of filter media used in an LID system. Two common types of [[Media filters|filter media]] used in stormwater treatment are granular media and membranes:   

*'''Granular media''' is a multilayer lattice or matrix that traps solids as water flows through the tortuous channels in the media. Examples of granular media include [[sand]] and [[Aggregates|gravel]].

*'''Granular media''' is a multilayer lattice or matrix that traps solids as water flows through the tortuous channels in the media. Examples of granular media include [[sand]] and [[Aggregates|gravel]].