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File:Unlabelled bioswale underdrain.png|thumb|730px|Bioswale with check dams, to facilitate short-term ponding (vertical scale exaggerated for diagram), graded sloped channel, mulch preserve soil moisture for plant survival to maintain the organic matter content of underlying filter media, filter media and vegetation to promote infiltration into the facility, an underdrain and river rock/stone to reduce flow velocity and erosion potential within the facility. <span style="color:red">''A note: The following is an "image map", feel free to explore the image with your cursor and click on highlighted labels that appear to take you to corresponding pages on the Wiki.''</span>

File:Unlabelled bioswale underdrain.png|thumb|700px|Bioswale with check dams, to facilitate short-term ponding (vertical scale exaggerated for diagram), graded sloped channel, mulch preserve soil moisture for plant survival to maintain the organic matter content of underlying filter media, filter media and vegetation to promote infiltration into the facility, an underdrain and river rock/stone to reduce flow velocity and erosion potential within the facility. <span style="color:red">''A note: The following is an "image map", feel free to explore the image with your cursor and click on highlighted labels that appear to take you to corresponding pages on the Wiki.''</span>

rect 160 131 656 720 [[Graminoids: List|Tall Grasses / Vegetation]]

rect 160 131 656 720 [[Graminoids: List|Tall Grasses / Vegetation]]

==Overview==

==Overview==

Similar to [[swales]], biofilters, [[enhanced swales|enhanced grassed swales]], and [[bioretention]], bioswales are long [[vegetation|vegetated]] open channels trapezoidal channels which are designed to:

Similar to [[swales]], biofilters, [[enhanced swales|enhanced grassed swales]], and [[bioretention]], bioswales are long [[vegetation|vegetated]] open channels trapezoidal channels which are designed to treat, convey, infiltrate, and attenuate incoming stormwater runoff. Similar to roadside ditches, they are predominately used to help direct large stormwater flow volume from a large catchment area (i.e., road, parking lot, property) to a connected discharge point (i.e. [[overflow|overflow outlet]] connected to the municipal storm sewer system, or to another LID BMP). Bioswales with the optional use of [[check dams]] can also slow and clean suspended sediments along the practice's sloped channel, while also allowing water to infiltrate through the system to an associated [[underdrain]] system below.   

*Infiltrate; and,

stormwater runoff. Similar to roadside ditches, they are predominately used to help direct large stormwater flow volume from a large catchment area (i.e., road, parking lot, property) to a connected discharge point (i.e. [[overflow|overflow outlet]] connected to the municipal storm sewer system, or to another LID BMP). Bioswales with the optional use of [[check dams]] can also slow and clean suspended sediments along the practice's sloped channel, while also allowing water to infiltrate through the system to an associated [[underdrain]] system below.   

There are several design variations of the bioswales, which include:  

There are several design variations of the bioswales, which include: