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poly 18 1742 18 2440 1920 1029 2513 530 2131 386 [[Turf|Salt Tolerant Grass Mix]]
poly 18 1742 18 2440 1920 1029 2513 530 2131 386 [[Turf|Salt Tolerant Grass Mix]]
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[[File:Wet swale.png|600px|thumb|The check dams are spaced slightly further apart than would be recommended to maximize infiltration capacity i.e. ponding isn't quite continuous between the dams.]]
[[File:Wet swale.png|600px|thumb|The check dams are spaced slightly further apart than would be recommended to maximize infiltration capacity i.e. ponding isn't quite continuous between the dams.]]
This article is about installations designed to capture and convey surface runoff along a vegetated channel, whilst also promoting infiltration. <br>
This article is about installations designed to capture and convey surface runoff along a vegetated channel, whilst also promoting infiltration. <br>
For underground conveyance which promotes infiltration, see [[Exfiltration trenches]].<br>
*For underground conveyance which promotes infiltration, see [[Exfiltration trenches]].<br>
For conveyance along planted channels, on both surface and underground, see [[Bioswales]].
*For conveyance along planted channels, on both surface and underground, see [[Bioswales]].
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==Overview==
==Overview==
Enhanced Grass Swales are vegetated open channels designed to convey, treat and attenuate stormwater runoff. Simple grass channels or ditches have long been used for stormwater conveyance, particularly for road drainage. Enhanced grass swales incorporate design features such as modified geometry and check dams that improve the contaminant removal and runoff reduction functions of simple grass channel and roadside ditch designs. Bioretention swales (i.e.bioswales, dry swales) incorporate filter media and possibly a perforated pipe underdrain to ensure they drain within the required drawdown time. Where development density, topography and depth to water table permit, swales are a preferable alternative to curb and gutter and storm drains as a stormwater conveyance system.<br>
{{textbox|Enhanced swales are an ideal technology for:
{{textbox|Enhanced swales are an ideal technology for:
*Sloped sites,
*Sloped sites,
*Cheaply retrofitting and improving the performance of existing grass swales.}}
*Cheaply retrofitting and improving the performance of existing grass swales.}}
Take a look at the downloadable Enhanced Grass Swales Factsheet below for a .pdf overview of this LID Best Management Practice:
Take a look at the downloadable Enhanced Grass Swales Factsheet below for a .pdf overview of this LID Best Management Practice: