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Wet swales occur when the water table is located very close to the surface or water does not readily drain out of the swale. A wet swale acts as a very long and linear shallow [https://stormwater.pca.state.mn.us/index.php?title=Bioretention_terminology#General_discussion_of_types_of_bioretention_BMPs biofiltration] or [https://stormwater.pca.state.mn.us/index.php?title=Stormwater_wetlands linear wetland treatment system]. Wet swales do not provide volume reduction and have limited treatment capability. Incorporation of check dams into the design allows treatment of a portion or all of the [https://stormwater.pca.state.mn.us/index.php?title=Water_quality_criteria water quality volume] within a series of cells created by the check dams. Wet swales planted with [https://stormwater.pca.state.mn.us/index.php?title=Plants_for_swales emergent wetland plant species] provide improved pollutant removal. Wet swales may be used as [[Pretreatment|pretreatment]] practices. Wet swales are commonly used for drainage areas less than 5 acres in size.
 
Wet swales occur when the water table is located very close to the surface or water does not readily drain out of the swale. A wet swale acts as a very long and linear shallow [https://stormwater.pca.state.mn.us/index.php?title=Bioretention_terminology#General_discussion_of_types_of_bioretention_BMPs biofiltration] or [https://stormwater.pca.state.mn.us/index.php?title=Stormwater_wetlands linear wetland treatment system]. Wet swales do not provide volume reduction and have limited treatment capability. Incorporation of check dams into the design allows treatment of a portion or all of the [https://stormwater.pca.state.mn.us/index.php?title=Water_quality_criteria water quality volume] within a series of cells created by the check dams. Wet swales planted with [https://stormwater.pca.state.mn.us/index.php?title=Plants_for_swales emergent wetland plant species] provide improved pollutant removal. Wet swales may be used as [[Pretreatment|pretreatment]] practices. Wet swales are commonly used for drainage areas less than 5 acres in size.
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<font size=4>[[Acknowledgements for dry swale|Acknowledgements]]</font size>
  
 
<font size=3>'''Wet swale (wetland channel) articles'''</font size>
 
<font size=3>'''Wet swale (wetland channel) articles'''</font size>

Revision as of 19:16, 15 May 2018

photo of a wet swale
Photo of a wet swale. Courtesy of Limnotech.
Green Infrastructure: Swales can be an important tool for retention and detention of stormwater runoff. Depending on design and construction, swales may provide additional benefits, including cleaner air, carbon sequestration, improved biological habitat, and aesthetic value. See the section Green Infrastructure for stormwater management.

Wet swales occur when the water table is located very close to the surface or water does not readily drain out of the swale. A wet swale acts as a very long and linear shallow biofiltration or linear wetland treatment system. Wet swales do not provide volume reduction and have limited treatment capability. Incorporation of check dams into the design allows treatment of a portion or all of the water quality volume within a series of cells created by the check dams. Wet swales planted with emergent wetland plant species provide improved pollutant removal. Wet swales may be used as pretreatment practices. Wet swales are commonly used for drainage areas less than 5 acres in size.

Acknowledgements

Wet swale (wetland channel) articles