Difference between revisions of "Talk:Enhanced Grass Swale Design Guide"
Jump to navigation
Jump to search
Jenny Hill (talk | contribs) m (Jenny Hill moved page Enhanced Grass Swale Design Guide to Talk:Enhanced Grass Swale Design Guide without leaving a redirect: Take offline) |
Jenny Hill (talk | contribs) m |
||
Line 1: | Line 1: | ||
'''This page is an archive, please do not review, use, or cite the information below''' | |||
{| class="wikitable" style="width: 100%; height: 200px;" | {| class="wikitable" style="width: 100%; height: 200px;" | ||
|- | |- |
Latest revision as of 21:39, 18 March 2018
This page is an archive, please do not review, use, or cite the information below
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 25 mm Chicago Storm | 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) for (25 mm Chicago Storm Event) | max 100 | max 100 | max 100 | |||||||||||
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 |