Free Water Surface CW's: Dimensions
FWS CW's with floating macrophytes:
Rule of thumb: 10 - 20 mē per p.e.
Depth of the water column: between 25 and 75 cm.
The flow velocity should be less than 0.15 m/s.

FWS CW's with emergent macrophytes:
Rule of thumb: 10 - 20 mē per p.e.
Depth of the water column: between 10 and 50 cm.

Stabilization ponds:
Rule of thumb: about 10 mē pond area per p.e.
Depth between 0.8 and 1.5 m deep.
Constructed Wetlands