Difference between revisions of "Talk:Green Roofs Design Guide"

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!colspan="2" style="backgroung=green; color:white"|Green Roof|| CVC+TRCA (Factsheets-2010)<ref>http://www.creditvalleyca.ca/wp-content/uploads/2012/02/lid-swm-guide-apdxa-green-roofs.pdf</ref>||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>|| LID-Design Guide Edmonton- 2014 || 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||Rhode Island-SW design & Installation Standards Manual-2012|| Minnesota SW Manual-2016  || 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"|Green Roof|| CVC+TRCA (Factsheets-2010)<ref>http://www.creditvalleyca.ca/wp-content/uploads/2012/02/lid-swm-guide-apdxa-green-roofs.pdf</ref>||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>|| LID-Design Guide Edmonton- 2014 || 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||Rhode Island-SW design & Installation Standards Manual-2012|| Minnesota SW Manual-2016  || 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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|colspan="2" |'''[[Slope(%)]]'''
|colspan="2" |'''Slope(%)'''
|<= 10 || <= 10 || < 5 (requires sloped underdrain),               5-20 (gravity drainage),                               > 20 lath grid is required ||  ||  ||  || See Table 2 for Media specs (Below) ||  ||  ||  ||  ||  ||  ||  ||  
|<= 10 || <= 10 || < 5 (requires sloped underdrain), 5-20 (gravity drainage),> 20 lath grid is required ||  ||  ||  || See Table 2 for Media specs (Below) ||  ||  ||  ||  ||  ||  ||  ||  
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|colspan="2" |'''[[Green Roof Assembly Weight(kg/m2)]]''' || 80 ||  || 290-967.7 (Intensive),                       129.1-169.4 (Extensive) ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  
|colspan="2" |'''Green Roof Assembly Weight(kg/m2)''' || 80 ||  || 290-967.7 (Intensive), 129.1-169.4 (Extensive) ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  
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|colspan="2" |'''[[Growing Medium Depth (cm)]]''' || 4-15 || 4-15 ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  
|colspan="2" |'''Growing Medium Depth (cm)''' || 4-15 || 4-15 ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  
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|colspan="2" style="text-align: right;|'''Intensive''' || > 15 || > 15 || 20-60 ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  
|colspan="2" style="text-align: right;|'''Intensive''' || > 15 || > 15 || 20-60 ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  
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|colspan="2" style="text-align: right;|'''Extensive''' || <= 15 || <= 15 || 10-15 ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  
|colspan="2" style="text-align: right;|'''Extensive''' || <= 15 || <= 15 || 10-15 ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  
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|colspan="2" |'''[[Fertilizer Applications (Nitrogen/m2)]]''' || < =  5.0 g  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  
|colspan="2" |'''Fertilizer Applications (Nitrogen/m2)''' || < =  5.0 g  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  
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|colspan="2" |'''[[Porosity of the drainage Layer (%)]]''' || > = 25% || > = 25% ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  
|colspan="2" |'''Porosity of the drainage Layer (%)''' || > = 25% || > = 25% ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  
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|colspan="2" |'''[[Ratio of impervious area to treatment facility area (%)]]''' ||  || 1:1 ||  ||  ||  || CDA:GR size +25% ||  ||  ||  || DA not limit, generally no runoff from surrounding area ||  ||  ||  ||  ||  
|colspan="2" |'''Ratio of impervious area to treatment facility area (%)''' ||  || 1:1 ||  ||  ||  || CDA:GR size +25% ||  ||  ||  || DA not limit, generally no runoff from surrounding area ||  ||  ||  ||  ||  
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|colspan="2" |'''[[Plant density]]''' ||  ||  || Seeds >= 325/m2,                Cuttings>= 12 kg/100m2,    Plugs>= 11/m2 ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  
|colspan="2" |'''Plant density''' ||  ||  || Seeds >= 325/m2,                Cuttings>= 12 kg/100m2,    Plugs>= 11/m2 ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  
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|colspan="2" |'''[[Filter Media]]''' ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  
|colspan="2" |'''Filter Media''' ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  
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|colspan="2" style="text-align: right;|'''Organic''' ||  ||  ||  || 25% || < 5% || <20% ||  || < 15% || <20% || < 15% || See Table 1 for media parameter ranges || < 15% || < 20% || 25% || 20%
|colspan="2" style="text-align: right;|'''Organic''' ||  ||  ||  || 25% || < 5% || <20% ||  || < 15% || <20% || < 15% || See Table 1 for media parameter ranges || < 15% || < 20% || 25% || 20%

Latest revision as of 17:35, 19 October 2018

This page is an archive, please do not review, use or cite the contents below

LID Practice CANADA United States
Green Roof CVC+TRCA (Factsheets-2010)[1] LID-SWM Guide 2010[2] LID-Design Guide Edmonton- 2014 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 Rhode Island-SW design & Installation Standards Manual-2012 Minnesota SW Manual-2016 Tennessee-LID Development-SWM 2016 Texas-LID Technical Guidance Manual-2013 Oregon SWM Manual-2014 Oregon State Univ. Fact Sheets-2011
Slope(%) <= 10 <= 10 < 5 (requires sloped underdrain), 5-20 (gravity drainage),> 20 lath grid is required See Table 2 for Media specs (Below)
Green Roof Assembly Weight(kg/m2) 80 290-967.7 (Intensive), 129.1-169.4 (Extensive)
Growing Medium Depth (cm) 4-15 4-15
Intensive > 15 > 15 20-60
Extensive <= 15 <= 15 10-15
Fertilizer Applications (Nitrogen/m2) < = 5.0 g
Porosity of the drainage Layer (%) > = 25% > = 25%
Ratio of impervious area to treatment facility area (%) 1:1 CDA:GR size +25% DA not limit, generally no runoff from surrounding area
Plant density Seeds >= 325/m2, Cuttings>= 12 kg/100m2, Plugs>= 11/m2
Filter Media
Organic 25% < 5% <20% < 15% <20% < 15% See Table 1 for media parameter ranges < 15% < 20% 25% 20%
Light Weight in-organic 75% 95-100 % 80-90% 100% > 85% 80-90% 85-100 % 80-90 % 80-90 % 50%
CEC > 10 > 10 > 10
pH 6.5-8 6.5-7.8 6.5-8
Sand S: 95%; D:85-95%
Silt S: <5%; D: 5-15%
Clay 0%
P-Content E: 2-10; I:2-15
Topsoil 25%
Porous Material 70%
Digested fiber 10%
Table 1: Recommended green roof growing medium parameter ranges
Parameter Extensive green roofs Intensive green roofs
pH 6.5 to 7.8 6.5 to 7.8
Nitrate-N (mg/L) 1 to 4 2 to 32
Ammonium-N (mg/L) 0.1 to 0.8 0.1 to 0.8
Nitrogen (total) (mg/L) 2 to 8 2 to 32
Phosphorus (total) (mg/L) 2 to 10 2 to 15
Potassium (mg/L) 8 to 32 8 to 64
Calcium (mg/L) 100 to 300 100 to 300
Magnesium 10 to 80 10 to 80
Iron (mg/L) 8 to 32 8 to 32
Manganese 1 to 8 1 to 8
Boron (mg/L) 0.04 to 0.6 0.04 to 0.6
Sodium (mg/L) <20 <20
Zinc (mg/L) 1 to 10 1 to 10
Soluble salts (mmhos/cm) 0.4 to 1.2 0.4 to 1.2
Sodium Absorption Ratio (SAR) <2 <2
Table 2:Example green roof media specifications
Parameter Specification
Noncapillary pore space at field capacity 155 (vol.)
Moisture content at field capacity 12% (vol.)
Maximum media water retention 30% (vol)
Alkalinity, CaCo3 equivalents 2.50%
Total organic matter by wet combustion 3-15% (dry wt.)
pH 6.5-8.0
Soluble Salts 6 mmhos/cm
Cation exchange capacity 10 meq/100g
Saturated hydraulic conductivity for single media assemblles 0.05 in/min
Clay fraction (2 micron) 0
Pct. Passing US#200 sieve (i.e., silt fraction) 5%
Pct. Passing US#60 sieve 10%
Pct. Passing US#18 sieve 5%-50%
Pct. Passing 1/8 inch sieve 20%-70%
Pct. Passing 3/8 inch sieve 75%-100%