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→Planning considerations
|Schematic of a vertical subsurface flow constructed wetland: Water flows through pipes on the subsurface of the ground through the root zone to the ground.
|Schematic of a vertical subsurface flow constructed wetland: Water flows through pipes on the subsurface of the ground through the root zone to the ground.
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|style="text-align:left;"|'''Pros'''
|style="text-align:left;"|'''Pros'''
*High levels of treatement possible
|style="text-align:left;"|'''Pros'''
*DIY possible
*Well established technology
*Low cost
*May be natural looking
*Need little to no gradient
*Provides buffer to discharge
*Good pathogen removal from die off and predation
*Minimal maintenance
*Wide range of plants suitable
*Robust
|style="text-align:left;"|'''Pros'''
*High levels of treatment possible
*DIY possible (to lower cost)
*May be run without power if significant gradient is avaialble
*May be run without power if significant gradient is avaialble
*Can be attractively designed to generate interest in the technology.
*Can be attractively designed to generate interest in the technology.
*Biologically complex and robust
*Biologically complex and robust
*Failure tends to be gradual
*Failure tends to be gradual
*Will function prior to establishment of vegitation
*Will function prior to establishment of vegetation
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|style="text-align:left;"|'''Cons'''
|style="text-align:left;"|'''Cons'''
*Requires more land
|style="text-align:left;"|'''Cons'''
*Requires fall of at least 1.5 m to provide sufficient treatment
*May be high cost
*Sensitive to hydraulic overloading
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|Maintenance||Medium to high||Low
|Maintenance||Medium to high||Low