Constructed wetlands are designed shallow basins used for water treatment filtering pollutants from water. The processes and services of natural wetlands are adapted to constructed wetlands and are used as a solution to treatment of combined sewer overflow during heavy rainfall events.
Benefits
(+) Water temperature control and provision.
(+) Water quality Improvement.
(+) Flood control / mitigation
(+) Habitat for wildlife
Limitations
(-) Potential to increase mosquitos which may cause diseases
(-) Requires large area or scattered units
Assessment
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