Unit processes of stormwater treatment techniques - filtration practices

Unit processes of stormwater treatment techniques for filtration practices (Adapted from WEF, 2008)
Link to this table

Control	Dry swale or step pool	Wet swale	Biofiltration	Permeable pavement	Tree box/tree trench	Green roof
Peak flow attenuation	X	X	X	X		X
Runoff volume reduction	X		X	X	X	X
Infiltration	X		X	X	X
Dispersion	X
Evapotranspiration	X	X	X		X	X
Runoff collection and usage			X	X
Sedimentation	X	X	X
Flotation			X
Laminar separation
Swirl concentration
Sorption	X	X	X	X		X
Precipitation			X	X
Coagulation			X	X
Filtration	X	X	X	X	X	X
Plant metabolism			X		X	X
Nitrification/denitrification		X	X
Organic compound degradation	X	X	X	X		X
Pathogen die off				X
Temperature reduction	X	X	X	X		X
Disinfection			X	X