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→Overview
For underground conveyance which promotes infiltration, see [[Exfiltration trenches]]. <br>
For underground conveyance which promotes infiltration, see [[Exfiltration trenches]]. <br>
For design recommendations on channels in which surface flow is controlled with [[check dams]], see [[Enhanced swales]].
For design recommendations on channels in which surface flow is controlled with [[check dams]], see [[Enhanced swales]].
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==Overview==
==Overview==
'''The fundamental components of a bioswale are:'''
'''The fundamental components of a bioswale are:'''
*[[Bioretention: Filter media | Filter media]], to permit infiltration into the facility (not necessarily to soils below)
*[[Bioretention: Filter media | Filter media]], to permit infiltration into the facility (not necessarily to soils below)
'''Additional components may include:'''
'''Additional components may include:'''
*[[Liner|Impermeable membrane]] to prevent infiltration to soils below
*[[Liner|Impermeable liner]] to prevent infiltration to soils below
*[[Check dams]] to facilitate short tern ponding
*[[Check dams]] to facilitate short tern ponding
==Planning considerations==
==Planning considerations==
Bioswales are sized as narrow linear [[bioretention cells]].
Bioswales are sized as narrow linear [[bioretention cells]].
[[Drainage time]] of bioswales are typically lower than other geometric configurations of similarly sized bioretention facilities, owing to the higher hydraulic radius of the sides.
[[Drainage time]] of bioswales is typically lower than other geometric configurations of similarly sized bioretention facilities, owing to the higher hydraulic radius of the sides.
==Design==
==Design==
==Gallery==
==Gallery==
{{:Bioswales: Gallery}}
{{:Bioswales: Gallery}}
==Planting Design Considerations==
*Where possible a combination of native trees, shrubs and perennial herbs should be used in addition to grasses.
*Most bioswales will be situated to receive full sun exposure. The ‘Exposure’ column in the master plant list identifies the sun exposure condition for each species.
*Facilities with a deeper media bed (greater than 1 m) provide the opportunity for a wider range of plant species (including trees).
*For applications along roads and parking lots, where snow may be plowed or stored, non-woody and salt tolerant species should be chosen.
*Proper spacing must be provided for aboveground and below ground utilities, and adjacent infrastructure.
==Performance==
==Performance==
{{:Bioswales: Performance}}
{{:Bioswales: Performance}}