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==Overview==
==Overview==
Free-water surface flow wetlands are most commonly employed for stormwater treatment and are similar to [[SWM ponds]] in function and design The most significant difference is the extent to which they are designed to incorporate shallow zones for wetland [[plants]]. 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 are most commonly employed for stormwater treatment and are similar to [[SWM ponds]] in function and design The most significant difference is the extent to which they are designed to incorporate shallow zones for wetland [[plants]]. A facility is normally characterized as a wetland if shallow zones (<0.5 m deep) make up more than 70 % of its volume.
−{{textbox|Wetlands are an ideal technology for:
{{textbox|Wetlands are an ideal technology for:
*Enhancing biodiversity
*Enhancing biodiversity
*Providing a more aesthetic aquatic landscape
*Providing a more aesthetic aquatic landscape
}}
}}
+
+Sub surface flow systems provide generally lower health and safety risks and are sometimes employed to handle stormwater in combination with another wastewater stream.
==Planning considerations==
==Planning considerations==