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| ! !! !! !! !! Canada !! !! !! US !! !! !! !! !! !! !! !! !! | | |- |
| | !colspan="2" style="background:white; color:black"| LID Practice |
| | !colspan="3" style="background: orange; color: black"|CANADA |
| | !colspan="10" style="background: brown; color: white"|United States |
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| | 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 | | !colspan="2" style="backgroung=green; color:white"|Bioretention|| CVC+TRCA (Factsheets-2010)<ref> http://www.creditvalleyca.ca/wp-content/uploads/2012/02/lid-swm-guide-apdxa-enhanced-grass-swales.pdf</ref>|| Toronto- 2016 || LID-SWM Guide 2010<ref> http://www.creditvalleyca.ca/wp-content/uploads/2014/04/LID-SWM-Guide-v1.0_2010_1_no-appendices.pdf</ref>|| 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 |
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| | || || || || Factsheets-2010 || || || || || || || || || || || || | | |colspan="2" style="color:red; text-align: left"| '''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 || || || || |
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| | 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 || || || || | | |colspan="2" style="color:red; text-align: left"| '''Max. Velocity For 4 hr. 25 mm(Chicago)''' |
| | | 0.5 m/s || 0.5 m/s || 0.5 m/s || || || || || || || || || || |
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| | Max. Velocity For 4 hr. 25 mm(Chicago) || || || || 0.5 m/s || 0.5 m/s || 0.5 m/s || || || || || || || || || || | | |colspan="2" style="color:red; text-align: left"| '''Setback from building Foundation(m)''' |
| | | 4 || || 4 || || || || || || || || || || |
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| | Setback from building Foundation(m) || || || || 4 || || 4 || || || || || || || || || || | | |colspan="2" style="color:red; text-align: left"|'''(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 || |
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| | (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 || | | |colspan="2" style="color:red; text-align: left"|'''longitudinal slope''' |
| | | (0.5-4.0)%,check dam for >3% || (0.5-4.0)%,check dam for >3% || (0.5-6.0) %, check dam for >3% || || || || || || || || || || |
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| | longitudinal slope || || || || (0.5-4.0) % || (0.5-4.0) % || (0.5-6.0) %, (0.5-4) || || || || || || || || || || | | |colspan="2" style="color:red; text-align: left"|'''Bottom width (m)''' |
| | | 0.75-3.0 || 0.75-3.0 || 0.75-3.0 || || || || || || || || || || |
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| | || || || || check dam for >3% || check dam for >3% || check dam for >3% || || || || || || || || || || | | |colspan="2" style="color:red; text-align: left"| '''Length''' |
| | | >= contributing roadway length || || || || || || || || || || || || |
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| | Bottom width (m) || || || || 0.75-3.0 || 0.75-3.0 || 0.75-3.0 || || || || || || || || || ||
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| | Length || || || || >= contributing || || || || || || || || || || || || | | |colspan="2" style="color:red; text-align: left"|'''Flow depth (mm) (25 mm Chicago storm event)''' |
| | | max 100 (25 mm storm) || max 100 (25 mm storm) || max 100 (25 mm storm) || || || || || || || || || || |
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| | || || || || roadway lengt || || || || || || || || || || || || | | |colspan="2" style="color:red; text-align: left"|'''Side slope (H:V)''' |
| | | Max. 2.5:1 , 4:1 where space permits|| Max. 2.5:1 , 4:1 is prefered || Max. 2.5:1 , 4:1 where space permits || || || || || || || || || || |
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| | Flow depth (mm) (25 mm Chicago storm event) || || || || max 100 (25 mm storm) || max 100 (25 mm storm) || max 100 (25 mm storm) || || || || || || || || || || | | |
| | |colspan="2" style="color:red; text-align: left"| '''Soil Amendments''' |
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| | Side slope (H:V) || || || || Max. 2.5:1 , 4:1 || Max. 2.5:1 , 4:1 is prefered || Max. 2.5:1 , 4:1 || || || || || || || || || || | | |colspan="2" style="color:black; text-align: right"|depth (mm) |
| | |300 || 300 || 300 || || || || || || || || || || |
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| | || || || || where space permits || || where space permits || || || || || || || || || || | | |colspan="2" style="color:black; text-align: right"|Oganic content |
| | |8-15% by weight || 8-15% by weight || 8-15% by weight || || || || || 3-15% || 5-10 % || || || || |
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| | Soil Amendments || || || || || || || || || || || || || || || || | | |colspan="2" style="color:red; text-align: left"|'''Grass height (mm)''' |
| | |75-150 || 150 || || || || || || || || || || || |
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| | depth (mm) || || || || 300 || 300 || 300 || || || || || || || || || || | | |colspan="2" style="color:red; text-align: left"| '''Gravel diaphram''' |
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| | Oganic content || || || || 8-15% by weight || 8-15% by weight || 8-15% by weight || || || || || 3-15% || 5-10 % || || || || | | |colspan="2" style="color:black; text-align: right"| Diameter (mm) |
| | || || || || 3-10 || || 3-10 || || || || || || || || || || |
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| | Grass height (mm) || || || || 75-150 || 150 || || || || || || || || || || || | | |colspan="2" style="color:black; text-align: right"|Min. Wide (mm) |
| | |300 || || 300 || || || || || || || || || || |
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| | Gravel diaphram || || || || || || || || || || || || || || || || | | |colspan="2" style="color:black; text-align: right"|Min. Deep (mm) |
| | |600 || || 600 || || || || || || || || || || |
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| | Diameter (mm) || || || || 3-10 || || 3-10 || || || || || || || || || || | | |colspan="2" style="color:red; text-align: left"|'''Available space of the contributing drainage area (%) ''' |
| | | 5-15 || || 5-15 || || || || || || || || || || |
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| | Min. Wide (mm) || || || || 300 || || 300 || || || || || || || || || || | | |colspan="2" style="color:red; text-align: left"|'''Depth between the bottom of the swale and high water table (m)''' |
| | |>= 1 || || >= 1 || || || || || || || || || || |
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| | Min. Deep (mm) || || || || 600 || || 600 || || || || || || || || || || | | |colspan="2" style="color:red; text-align: left"|'''Enhanced grass swales area/contributing road surface''' |
| | |1:1 || || || || || || || || || || || |
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| | Available space of the contributing || || || || 5-15 || || 5-15 || || || || || || || || || || | | |colspan="2" style="color:red; text-align: left"|'''Drainage time of ponded water after the end of storm event , hr''' |
| | |< = 24 || || || || || || || || || || |
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| | drainage area (%) || || || || || || || || || || || || || || || || | | |colspan="2" style="color:red; text-align: left"|'''CDA or Impervious ratio''' |
| | || || || || || || || || || < 5 acres || < 2.5 acres || || || |
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| | Depth between the bottom of the || || || || >= 1 || || >= 1 || || || || || || || || || || | | |colspan="2" style="color:red; text-align: left"|'''Filter Media''' |
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| | swale and high water table (m) || || || || || || || || || || || || || || || || | | |colspan="2" style="color:black; text-align: right| Sand |
| | || || || || || 50% || || || 85-88% || || 70-85 % || || 66% || 60% |
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| | Enhanced grass swales area/contributing road surface || || || || || 1:1 || || || || || || || || || || || | | |colspan="2" style="color:black; text-align: right|Loam |
| | || || || || || 50% || || || || || || || || |
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| | Drainage time of ponded water after the end of storm event , hr || || || || || || < = 24 || || || || || || || || || || | | |colspan="2" style="color:black; text-align: right|Soil Fines |
| | || || || || || || || || 8-12% || || 10-20% (silt), max. 10% (clay) || || || |
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| | CDA or Impervious ratio || || || || || || || || || || || || < 5 acres || < 2.5 acres || || || | | |colspan="2" style="color:black; text-align:right |Organic |
| | || || || || || || || || || || 5-10 % || > 5% otherwise amend 2" with media || 33% || 40% |
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| | Filter Media || || || || || || || || || || || || || || || || | | |colspan="2" style="color:black; text-align: right| CEC |
| | || || || || || || || || || || > 10 || || || > 5 |
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| | || || || Sand || || || || || 50% || || || 85-88% || || 70-85 % || || 66% || 60% | | |colspan="2" style="color:black; text-align: right|pH |
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| | || || || || || || || || || || || || || 5.5-7.5 |
| | || || || Loam || || || || || 50% || || || || || || || ||
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| | || || || Soil Fines || || || || || || || || 8-12% || || 10-20% (silt), max. 10% (clay) || || ||
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| | || || || Organic || || || || || || || || || || 5-10 % || > 5% otherwise amend 2" with media || 33% || 40%
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| | || || || CEC || || || || || || || || || || > 10 || || || > 5 | |
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| | || || || pH || || || || || || || || || || || || || 5.5-7.5
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| |} | | |} |