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| !Vertical sub-surface flow | | !Vertical sub-surface flow |
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− | |[[File:Schematic of the Free Water Surface Constructed Wetland.jpg|frameless|Schematic of a free-water surface constructed wetland: It aims to replicate the naturally occurring processes, where particles settle, pathogens are destroyed, and organisms and plants utilize the nutrients.]] | + | |[[File:Schematic of the Free Water Surface Constructed Wetland.jpg|frameless]] |
− | |[[File:Tilley et al 2014 Schematic of the Horizontal Subsurface Flow Constructed Wetland.jpg|frameless|Schematic of the Horizontal Subsurface Flow Constructed Wetland: Water flows horizontally through the bed.]] | + | |[[File:Tilley et al 2014 Schematic of the Horizontal Subsurface Flow Constructed Wetland.jpg|frameless]] |
| |[[File:Tilley et al 2014 Schematic of the Vertical Flow Constructed Wetland.jpg|frameless|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.]] | | |[[File:Tilley et al 2014 Schematic of the Vertical Flow Constructed Wetland.jpg|frameless|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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− | |Surface water||Minimal<br>Any surface flow can be slowed with check dams||Ponding is encouraged with check dams | + | |Schematic of a free-water surface constructed wetland: It aims to replicate the naturally occurring processes, where particles settle, pathogens are destroyed, and organisms and plants utilize the nutrients. |
| + | |Schematic of the Horizontal Subsurface Flow Constructed Wetland: Water flows horizontally through the bed. |
| + | |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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− | |Soil||Filter media required||Amendment preferable when possible | + | |Soil |
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| |Underdrain||Common||Uncommon | | |Underdrain||Common||Uncommon |