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Talk:Enhanced Grass Swale Design Guide (view source)
Revision as of 17:59, 3 October 2017
, 7 years agoCreated page with "{| class="wikitable" ! !! !! !! !! Canada !! !! !! US !! !! !! !! !! !! !! !! !! |- | Enhanced grass swales || || || || CVC+TRCA || Toronto- 2016 || LID-SWM..."
{| class="wikitable"
! !! !! !! !! Canada !! !! !! US !! !! !! !! !! !! !! !! !!
|-
| Enhanced grass swales || || || || CVC+TRCA || Toronto- 2016 || LID-SWM Guide 2010 || New York State SWM Design Manual-2015 || Massachusets SW BMP-2013 || District of Columbia-SWM Guidebook-2010 || San Diego LID Handbook-2014 || Alabama LID Handbook-2013 || W. Virginia-SWM design guidance manual-2012 || Tennessee-LID Development-SWM 2016 || Texas-LID Technical Guidance Manual-2013 || Oregon SWM Manual-2014 || Oregon State Univ. Fact Sheets-2011
|-
| || || || || Factsheets-2010 || || || || || || || || || || || ||
|-
| Swale length between culverts || || || || >= 5 || >= 5 || >= 5 || || || || Can amend with 2" of soil media or plant-derived compost to increase infiltration || < 5 acres, capture runoff from 10-20% of the IPCDA, soil could also be 50/50 sand soil mix instead of bioretention media || Compost amendments over full length and width || || || ||
|-
| Max. Velocity For 4 hr. 25 mm(Chicago) || || || || 0.5 m/s || 0.5 m/s || 0.5 m/s || || || || || || || || || ||
|-
| Setback from building Foundation(m) || || || || 4 || || 4 || || || || || || || || || ||
|-
| (Impervious drainage/treatment) area || || || || 5:1 to 10:1 || || 5:1 to 10:1 || CDA < 5 acres and WQV peak flow < 3 cfs || || CDA < 2.5 acres || || || || || || CDA <15000 ft2 ||
|-
| longitudinal slope || || || || (0.5-4.0) % || (0.5-4.0) % || (0.5-6.0) %, (0.5-4) || || || || || || || || || ||
|-
| || || || || check dam for >3% || check dam for >3% || check dam for >3% || || || || || || || || || ||
|-
| Bottom width (m) || || || || 0.75-3.0 || 0.75-3.0 || 0.75-3.0 || || || || || || || || || ||
|-
| Length || || || || >= contributing || || || || || || || || || || || ||
|-
| || || || || roadway lengt || || || || || || || || || || || ||
|-
| Flow depth (mm) (25 mm Chicago storm event) || || || || max 100 (25 mm storm) || max 100 (25 mm storm) || max 100 (25 mm storm) || || || || || || || || || ||
|-
| Side slope (H:V) || || || || Max. 2.5:1 , 4:1 || Max. 2.5:1 , 4:1 is prefered || Max. 2.5:1 , 4:1 || || || || || || || || || ||
|-
| || || || || where space permits || || where space permits || || || || || || || || || ||
|-
| Soil Amendments || || || || || || || || || || || || || || || ||
|-
| depth (mm) || || || || 300 || 300 || 300 || || || || || || || || || ||
|-
| Oganic content || || || || 8-15% by weight || 8-15% by weight || 8-15% by weight || || || || || 3-15% || 5-10 % || || || ||
|-
| Grass height (mm) || || || || 75-150 || 150 || || || || || || || || || || ||
|-
| Gravel diaphram || || || || || || || || || || || || || || || ||
|-
| Diameter (mm) || || || || 3-10 || || 3-10 || || || || || || || || || ||
|-
| Min. Wide (mm) || || || || 300 || || 300 || || || || || || || || || ||
|-
| Min. Deep (mm) || || || || 600 || || 600 || || || || || || || || || ||
|-
| Available space of the contributing || || || || 5-15 || || 5-15 || || || || || || || || || ||
|-
| drainage area (%) || || || || || || || || || || || || || || || ||
|-
| Depth between the bottom of the || || || || >= 1 || || >= 1 || || || || || || || || || ||
|-
| swale and high water table (m) || || || || || || || || || || || || || || || ||
|-
| Enhanced grass swales area/contributing road surface || || || || || 1:1 || || || || || || || || || || ||
|-
| Drainage time of ponded water after the end of storm event , hr || || || || || || < = 24 || || || || || || || || || ||
|-
| CDA or Impervious ratio || || || || || || || || || || || || < 5 acres || < 2.5 acres || || ||
|-
| Filter Media || || || || || || || || || || || || || || || ||
|-
| || || || Sand || || || || || 50% || || || 85-88% || || 70-85 % || || 66% || 60%
|-
| || || || Loam || || || || || 50% || || || || || || || ||
|-
| || || || Soil Fines || || || || || || || || 8-12% || || 10-20% (silt), max. 10% (clay) || || ||
|-
| || || || Organic || || || || || || || || || || 5-10 % || > 5% otherwise amend 2" with media || 33% || 40%
|-
| || || || CEC || || || || || || || || || || > 10 || || || > 5
|-
| || || || pH || || || || || || || || || || || || || 5.5-7.5
|}
! !! !! !! !! Canada !! !! !! US !! !! !! !! !! !! !! !! !!
|-
| Enhanced grass swales || || || || CVC+TRCA || Toronto- 2016 || LID-SWM Guide 2010 || New York State SWM Design Manual-2015 || Massachusets SW BMP-2013 || District of Columbia-SWM Guidebook-2010 || San Diego LID Handbook-2014 || Alabama LID Handbook-2013 || W. Virginia-SWM design guidance manual-2012 || Tennessee-LID Development-SWM 2016 || Texas-LID Technical Guidance Manual-2013 || Oregon SWM Manual-2014 || Oregon State Univ. Fact Sheets-2011
|-
| || || || || Factsheets-2010 || || || || || || || || || || || ||
|-
| Swale length between culverts || || || || >= 5 || >= 5 || >= 5 || || || || Can amend with 2" of soil media or plant-derived compost to increase infiltration || < 5 acres, capture runoff from 10-20% of the IPCDA, soil could also be 50/50 sand soil mix instead of bioretention media || Compost amendments over full length and width || || || ||
|-
| Max. Velocity For 4 hr. 25 mm(Chicago) || || || || 0.5 m/s || 0.5 m/s || 0.5 m/s || || || || || || || || || ||
|-
| Setback from building Foundation(m) || || || || 4 || || 4 || || || || || || || || || ||
|-
| (Impervious drainage/treatment) area || || || || 5:1 to 10:1 || || 5:1 to 10:1 || CDA < 5 acres and WQV peak flow < 3 cfs || || CDA < 2.5 acres || || || || || || CDA <15000 ft2 ||
|-
| longitudinal slope || || || || (0.5-4.0) % || (0.5-4.0) % || (0.5-6.0) %, (0.5-4) || || || || || || || || || ||
|-
| || || || || check dam for >3% || check dam for >3% || check dam for >3% || || || || || || || || || ||
|-
| Bottom width (m) || || || || 0.75-3.0 || 0.75-3.0 || 0.75-3.0 || || || || || || || || || ||
|-
| Length || || || || >= contributing || || || || || || || || || || || ||
|-
| || || || || roadway lengt || || || || || || || || || || || ||
|-
| Flow depth (mm) (25 mm Chicago storm event) || || || || max 100 (25 mm storm) || max 100 (25 mm storm) || max 100 (25 mm storm) || || || || || || || || || ||
|-
| Side slope (H:V) || || || || Max. 2.5:1 , 4:1 || Max. 2.5:1 , 4:1 is prefered || Max. 2.5:1 , 4:1 || || || || || || || || || ||
|-
| || || || || where space permits || || where space permits || || || || || || || || || ||
|-
| Soil Amendments || || || || || || || || || || || || || || || ||
|-
| depth (mm) || || || || 300 || 300 || 300 || || || || || || || || || ||
|-
| Oganic content || || || || 8-15% by weight || 8-15% by weight || 8-15% by weight || || || || || 3-15% || 5-10 % || || || ||
|-
| Grass height (mm) || || || || 75-150 || 150 || || || || || || || || || || ||
|-
| Gravel diaphram || || || || || || || || || || || || || || || ||
|-
| Diameter (mm) || || || || 3-10 || || 3-10 || || || || || || || || || ||
|-
| Min. Wide (mm) || || || || 300 || || 300 || || || || || || || || || ||
|-
| Min. Deep (mm) || || || || 600 || || 600 || || || || || || || || || ||
|-
| Available space of the contributing || || || || 5-15 || || 5-15 || || || || || || || || || ||
|-
| drainage area (%) || || || || || || || || || || || || || || || ||
|-
| Depth between the bottom of the || || || || >= 1 || || >= 1 || || || || || || || || || ||
|-
| swale and high water table (m) || || || || || || || || || || || || || || || ||
|-
| Enhanced grass swales area/contributing road surface || || || || || 1:1 || || || || || || || || || || ||
|-
| Drainage time of ponded water after the end of storm event , hr || || || || || || < = 24 || || || || || || || || || ||
|-
| CDA or Impervious ratio || || || || || || || || || || || || < 5 acres || < 2.5 acres || || ||
|-
| Filter Media || || || || || || || || || || || || || || || ||
|-
| || || || Sand || || || || || 50% || || || 85-88% || || 70-85 % || || 66% || 60%
|-
| || || || Loam || || || || || 50% || || || || || || || ||
|-
| || || || Soil Fines || || || || || || || || 8-12% || || 10-20% (silt), max. 10% (clay) || || ||
|-
| || || || Organic || || || || || || || || || || 5-10 % || > 5% otherwise amend 2" with media || 33% || 40%
|-
| || || || CEC || || || || || || || || || || > 10 || || || > 5
|-
| || || || pH || || || || || || || || || || || || || 5.5-7.5
|}