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→Planning considerations
==Planning considerations==
==Planning considerations==
Constructed wetlands differ based on how water travels through the system<ref>Grant, N., M. Moodie, and C. Weedon. 2000. Sewage Treatment Solutions. p. 35–67. In Sewage Solutions: Answering the Call of Nature. Centre for Alternative Technology Publications.</ref><ref name="EPA">United States Environmental Protection Agency. 1995. A handbook of constructed wetlands: A guide to creating wetlands for agricultural wastewater, domestic wastewater, coal mine drainage and stormwater.</ref><ref name="JW">Jacques Whitford Consultants, 2008. Constructed and engineered wetlands. p. 1-21</ref>:
Constructed wetlands differ based on how water travels through the system<ref>Grant, N., M. Moodie, and C. Weedon. 2000. Sewage Treatment Solutions. p. 35–67. In Sewage Solutions: Answering the Call of Nature. Centre for Alternative Technology Publications.</ref><ref name="EPA">United States Environmental Protection Agency. 1995. A handbook of constructed wetlands: A guide to creating wetlands for agricultural wastewater, domestic wastewater, coal mine drainage and stormwater.</ref><ref name="JW">Jacques Whitford Consultants, 2008. Constructed and engineered wetlands. p. 1-21</ref>:
*Free-water surface flow wetlands have water exposed on the surface, which provides excellent water quality treatment but may pose health and safety risks. Free-water surface flow wetlands are most commonly employed for stormwater treatment and are similar to [[SWM ponds]] in function and design. However, ponds and wetlands differ by the extent to which shallow zones for wetland [[plants]] are incorporated. A facility is normally characterized as a wet pond if shallow zones (<0.5 m deep) comprise less than 20% of its surface area, while a facility is normally characterized as a wetland if shallow zones (<0.5 m deep) make up more than 70 % of its volume.
*Free-water surface flow wetlands have water exposed on the surface, which provides excellent water quality treatment but may pose health and safety risks. Free-water surface flow wetlands are most commonly employed for stormwater treatment and are similar to [[SWM ponds]] in function and design. However, ponds and wetlands differ by the extent to which shallow zones for wetland [[plants]] are incorporated. A facility is normally characterized as a wet pond if shallow zones (<0.5 m deep) comprise less than 20% of its surface area, while a facility is normally characterized as a wetland if shallow zones (<0.5 m deep) make up more than 70 % of its volume. Unlike SWM ponds and constructed wetlands, [[Dry ponds|dry ponds]] are designed to temporarily store stormwater runoff and completely drain out between storm events and focus more on flood attenuation than treatment.
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