Difference between revisions of "Talk:Enhanced Grass Swale Design Guide"

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!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 ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  
|-
|-
| ||  ||  ||  || 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) ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  
|-
|-
| || || ||  || 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 ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  
|-
|-
| ||  ||  ||  || 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 ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  
|-
|-
| 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'''
|-
|-
| 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% ||  ||  ||  ||  ||  ||  ||  ||  
|-
|-
| 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
|-
|-
| ||  ||  || Sand ||  ||  ||  ||  || 50% ||  ||  || 85-88% ||  || 70-85 % ||  || 66% || 60%
|colspan="2" style="color:black; text-align: right|pH
|-
||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  || 5.5-7.5
|  ||  ||  || 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
|}
|}

Revision as of 19:16, 3 October 2017

LID Practice CANADA United States
Bioretention CVC+TRCA (Factsheets-2010)[1] Toronto- 2016 LID-SWM Guide 2010[2] 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
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)%,check dam for >3% (0.5-4.0)%,check dam for >3% (0.5-6.0) %, check dam for >3%
Bottom width (m) 0.75-3.0 0.75-3.0 0.75-3.0
Length >= contributing roadway length
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 where space permits Max. 2.5:1 , 4:1 is prefered Max. 2.5:1 , 4:1 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 drainage area (%) 5-15 5-15
Depth between the bottom of the swale and high water table (m) >= 1 >= 1
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