Changes

'''The fundamental components of an enhanced grassed swale are:'''

'''The fundamental components of an enhanced grassed swale are:'''

*Graded channel

*Graded channel

*[[Turf| Resilient turf grass]]

*[[Turf| Resilient turf grass]] or [[#Planting_Considerations|other planting]]

*[[Check dams]], to facilitate short term ponding

*[[Check dams]], to facilitate short term ponding

'''Additional components may include:'''

'''Additional components may include:'''

*[[Absorbent landscapes| Amended soil]], to of [[filter media]] increase infiltration to soils below

*[[Absorbent landscapes| Amended soil]] or [[filter media]] to increase infiltration to soils below

*[[Turf reinforcement]], to prevent scour

*[[Turf reinforcement]], to prevent scour

*33% height of vegetation for infrequently mown swales.  

*33% height of vegetation for infrequently mown swales.  

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===Check dams===

===Planting Considerations===

*[[Grasses]] and herbaceous species with dense root structure cover should be favoured along the bottom of the swale for their ability to increase infiltration, stabilize soils, retain pollutants and assist with suspended solids.  

==Planting Design Considerations==

*Grasses and herbaceous species with dense root structure cover should be favoured along the bottom of the swale for their ability to increase infiltration, stabilize soils, retain pollutants and assist with suspended solids.  

*The plant material on the slopes of grass channels must be capable of withstanding periodic inundation in addition to extended periods of drought. Species include grasses and groundcovers, as well as low shrub species.  

*The plant material on the slopes of grass channels must be capable of withstanding periodic inundation in addition to extended periods of drought. Species include grasses and groundcovers, as well as low shrub species.  

*Plants along the exterior of this zone act to slow the flow during stormwater events, reducing sedimentation and increasing infiltration.  The root structure of this plant material also acts to reduce erosion.

*Plants along the exterior of this zone act to slow the flow during stormwater events, reducing sedimentation and increasing infiltration.  The root structure of this plant material also acts to reduce erosion.

*Species are salt-tolerant due to the typical location of grass channels along roadways and parking lots.  

*Species are salt-tolerant due to the typical location of grass channels along roadways and parking lots.  

*Erosion protection such as river stone or riprap will be required to dissipate the energy from incoming concentrated flow.  

*Erosion protection such as river stone or riprap will be required to dissipate the energy from incoming concentrated flow.  

*The channel must be vegetated immediately after grading. Preferably, the swale should be planted in the spring so that the vegetation can become established with minimal irrigation.

*The channel must be vegetated immediately after [[grading]]. Preferably, the swale should be planted in the spring so that the vegetation can become established with minimal irrigation.

 

 

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