Difference between revisions of "Talk:Bioretention Design Guide"
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!colspan="2" style="background: | !colspan="2" style="background:white; color:black"| LID Practice | ||
!colspan="6" style="background: | !colspan="6" style="background: orange; color: black"|CANADA | ||
!colspan="13" style="background: | !colspan="13" style="background: brown; color: white"|United States | ||
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!colspan="2" | | !colspan="2" style="backgroung=green; color:white"|Bioretention|| CVC+TRCA (Factsheets-2010) || CVC-Construction Guide-2012 || CVC-Retrofit Guide-2014 || Toronto- 2016 || LID-SWM Guide 2010 || 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 || Pennsylvania-City of Philadelphia green St. design manual-2014 || Minnesota SW Manual-2017 || 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" style="background:yellow; color:black"|Filter media depth (m) | |||
| Filter media depth (m) | |||
|- | |- | ||
| Depth | | ||||'''Depth''' ||| 1-1.25 || || || 1-1.25 || 1-1.25 || 0.5-1.0 || || || || || || || || || >= 2.5 ft. || || || || | ||
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| Composition || Topsoil || || || || || || || 30-50% || 20-30 % || || || || 8-20 % || || || Table 1 & 2 (below) || || || || | !colspan="2" style="background:yellow; color:black"|Composition | ||
|- | |||
||| Topsoil || || || || || || || 30-50% || 20-30 % || || || || 8-20 % || || || Table 1 & 2 (below) || || || || | |||
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| || sand || 85-88 % || Fine sand=0-17%, Coarse to medium sand=71-92 % || 85-88 % || 85-88 % || 85-88 % || 50-85 % || 50-70 || 40% || 85-88 % || 65% sand, 20% sand loam || 85-88 % || 70-88 % || 85-88 % || 50-80 % || || 70-85 % (sandy loam) || 85-88 % || 66% || 60% (sandy loam) | | || sand || 85-88 % || Fine sand=0-17%, Coarse to medium sand=71-92 % || 85-88 % || 85-88 % || 85-88 % || 50-85 % || 50-70 || 40% || 85-88 % || 65% sand, 20% sand loam || 85-88 % || 70-88 % || 85-88 % || 50-80 % || || 70-85 % (sandy loam) || 85-88 % || 66% || 60% (sandy loam) | ||
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| || Compost (optional) || || || || || || 15-25% || || || || 15% || || || || || || || || || | | || Compost (optional) || || || || || || 15-25% || || || || 15% || || || || || || || || || | ||
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| Gravel storage | !colspan="2" style="background:yellow; color:black"|Gravel storage | ||
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| Void space ratio | ||| Void space ratio || 0.4 || || || || 0.4 || || || || || || || || || || || || || || | ||
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| | ||| Depth || min. 300 mm || || || min. 300 mm || min. 300 mm || || || || || || || || || || || || || || | ||
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| Diameter(clear stone) | ||| Diameter(clear stone) || 50 mm || || || 50 mm || 50 mm || || || || || || || || || || || || || || | ||
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| | |Pea gravel choking layer ||depth (mm) || 100 || || || || 100 || 100 || || || || || || || || || || || || || | ||
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| diameter (mm) | ||| diameter (mm) || 3-10 || || || || 3-10 || || || || || || || || || || || || || || | ||
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| Mulch | !colspan="2" style="background:yellow; color:black"|Mulch | ||
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| | | ||Depth || 75 mm || <=75 mm || || 75 mm || 75 mm || 70-80 || || || || || || || || || || || || || | ||
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| Overflow | !colspan="2" style="background:yellow; color:black"|Overflow | ||
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| Overflow invert above the filter bed surface | | ||Overflow invert above the filter bed surface || 150-250 || || || <= 250 mm || || || || || || || || || || || || || || || | ||
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| Monitoring well | !colspan="2" style="background:yellow; color:black"|Monitoring well | ||
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| Vertical perforated pipe diameter | ||| Vertical perforated pipe diameter || 100-150 mm || 100-150 mm || || 100-150 mm || 100-150 mm || || || || || || || || || || || || || || | ||
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| Underdrain | !colspan="2" style="background:yellow; color:black"|Underdrain | ||
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| Required when infiltration rate | ||| Required when infiltration rate || < 15 mm/hr || || || < 15 mm/hr || || < 13 mm/hr || || || || || || || || || || || || || | ||
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| | | ||Diameter || min. 100 mm(200 mm recommended) || min. 100 mm, 200 mm is recommended || || min. 200 mm || min. 100 mm(200 mm recommended) || 200 mm || || || || || || || || || 4 inches || || || || | ||
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| Depth above the gravel storage layer | | ||Depth above the gravel storage layer || 100 mm || || || 100 mm || || || || || || || || || || || || || || || | ||
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| Available head beween the inflow point | ||| Available head beween the inflow point and the downstream stream drain invert || 1-1.5 m || || || || 1-1.5 m || || || || || || || Typical CDA 0.1-2.5 acres of 100% IP(<0.5 no underdrain), alternative to checking layer is needle punched non-woven geotextile || || || || || || || | ||
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| Contributing drainage area | !colspan="2" style="background:yellow; color:black"|Contributing drainage area | ||
|- | |||
|||Typical || 100 m2 to 0.5 hectare || || || || 100 m2 to 0.5 hectare || || || || || || 0.5-2 acres preferred, max 5 acres, BR min. size 200 ft2 || || || || 5 acres || || || || | |||
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| | |||Maximum recommended || 0.8 hectare || || || || 0.8 hectare || || || || || || || || || || || || || || | ||
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| Setback from building Foundation(m) | |colspan="2" style="background:yellow; color:black; text-align: center" |'''Setback from building Foundation(m)''' || 4 || || || 4 || 4 || 3 (clay), 5 (heavy clay) || || || || || || || || || see table 3 below || || || || | ||
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| (Impervious drainage/treatment facility) area | |colspan="2" style="background:yellow; color:black; text-align: center"| '''(Impervious drainage/treatment facility) area''' || 5:1 to 15:1 || || || 5:1 to 15:1 || 5:1 to 15:1 || || < 5:1 loading ratio (DA to IA, DA 100% IP) || SA of BR 3 to 6% of CDA || || || sized at 5-8 % of IPCDA || BR SA 3-6% of CDA || || || CDA < 5 acres || CDA < 2.5 acres || CDA < 5 acres || || BR SA: 6-15 % of IP area | ||
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| Contributing Slope (%) | |colspan="2" style="background:yellow; color:black; text-align: center"| '''Contributing Slope (%)''' || 1-5 || || || || 1-5 || || || || || || || || || || >1 % and < 33% || || || || | ||
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| Slope of the surface, % | |colspan="2" style="background:yellow; color:black; text-align: center"| '''Slope of the surface, %''' || || || || || || || || || || || || || || || <= 1% || || || || | ||
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| Water table depth | |colspan="2" style="background:yellow; color:black; text-align: center"| '''Water table depth''' || min. 1.0 m || || || || min. 1.0 m || > 1.8 || || || || || || || || || 3 ft. || || || || | ||
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| Outlet | |colspan="2" style="background:yellow; color:black; text-align: center"| '''Outlet''' || || min. 100 mm above the bottom of the facility || || || || || || || || || || || || || Difference in elevation between inflow and outflow =4-6 ft (when underdrain is used) || || || || | ||
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| Maximum ponding depth above the filter bed surface | |colspan="2" style="background:yellow; color:black; text-align: center"| '''Maximum ponding depth above the filter bed surface''' || 150-250 mm || || || 250 mm || 150-250 mm || 350 mm || || || || || || || || || 18 inch || || || || | ||
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| Facilties receiving road runoff are not located within time of travel | |colspan="2" style="background:yellow; color:black; text-align: center"| '''Facilties receiving road runoff are not located within time of travel''' || 2 || || || || 2 || || || || || || || || || || || || || || | ||
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| wellhead protection areas, year | |colspan="2" style="background:yellow; color:black; text-align: center"| '''wellhead protection areas, year''' || || || || || || || || || || || || || || || || || || || | ||
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| Drainage time of ponded water after the end of storm event , hr | |colspan="2" style="background:yellow; color:black; text-align: center"| '''Drainage time of ponded water after the end of storm event , hr''' || || || || || 24 (48 recommd.) || < 48 (2 yr. design) || || || || || || || || || Max. 48 hr. || || || || | ||
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| Inlet design for non-point source-grass filter buffer, m | |colspan="2" style="background:yellow; color:black; text-align: center"| '''Inlet design for non-point source-grass filter buffer, m''' || || || || || || 0.5-3.0 || || || || || || || || || || || || || | ||
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| Surface area/Contributing drainage area, % | |colspan="2" style="background:yellow; color:black; text-align: center"| '''Surface area/Contributing drainage area, %''' || 10-20 % || || || || 10-20 % || 3.0-30 % || || || || || || || || || (5-10)%- min. 200 ft2 || || || || | ||
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| Contributing impervious area | |colspan="2" style="background:yellow; color:black; text-align: center"| '''Contributing impervious area''' || || || || || || < 4.0 ha. || ` || || || || || || || || || || || < 15000 ft2 || | ||
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| Facility flow velocity | |colspan="2" style="background:yellow; color:black; text-align: center"| '''Facility flow velocity''' || || || || || || < 0.3 m/s-planted area || || || || || || || || || <= 1 ft/sec, tree-shurb-mulch cell || || || || | ||
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| | |colspan="2" style="background:yellow; color:black; text-align: center"| || || || || || || < 0.9 m/s- mulched zone || || || || || || || || || <= 3 ft/sec , grassed cell || || || || | ||
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| Discharge velocity (outlet point) | |colspan="2" style="background:yellow; color:black; text-align: center"| '''Discharge velocity (outlet point)''' || || || || || || || || || || || || || || || < 4 ft/sec || || || || | ||
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| Side slope (H:V) | |colspan="2" style="background:yellow; color:black; text-align: center"| '''Side slope (H:V)''' || || || || || || 4:1 preferred(max 2:1) || || || || || || || || || 3:1 (H:V) || || || || | ||
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| Surface geometery (length/width) | |colspan="2" style="background:yellow; color:black; text-align: center"| '''Surface geometery (length/width)''' || || || || || || 2:1 || || || || || || || || || || || || || | ||
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| Infiltration trench (optional) | |colspan="2" style="background:yellow; color:black; text-align: center"| '''Infiltration trench (optional)''' || || || || || || || || || || || || || || || || || || || | ||
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| Depth, m | ||| Depth, m || || || || || || 0.5-1.0 || || || || || || || || || || || || || | ||
|- | |- | ||
| Width, m | ||| Width, m || || || || || || 1.0-6.0 || || || || || || || || || || || || || | ||
|- | |- | ||
| Bottom slope, % | ||| Bottom slope, % || || || || || || 0 || || || || || || || || || || || || || | ||
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| C/N Ratio | |colspan="2" style="background:yellow; color:black; text-align: center"| '''C/N Ratio''' || || || || || || || || || || || || || || 12:1-25:1 || || || || || | ||
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| || || || || || || || || || || || || || || || || || || || || | | || || || || || || || || || || || || || || || || || || || || | ||
|} | |} |
Revision as of 14:53, 25 September 2017
LID Practice | CANADA | United States | ||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Bioretention | CVC+TRCA (Factsheets-2010) | CVC-Construction Guide-2012 | CVC-Retrofit Guide-2014 | Toronto- 2016 | LID-SWM Guide 2010 | 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 | Pennsylvania-City of Philadelphia green St. design manual-2014 | Minnesota SW Manual-2017 | Tennessee-LID Development-SWM 2016 | Texas-LID Technical Guidance Manual-2013 | Oregon SWM Manual-2014 | Oregon State Univ. Fact Sheets-2011 | |
Filter media depth (m) | ||||||||||||||||||||
Depth | 1-1.25 | 1-1.25 | 1-1.25 | 0.5-1.0 | >= 2.5 ft. | |||||||||||||||
Composition | ||||||||||||||||||||
Topsoil | 30-50% | 20-30 % | 8-20 % | Table 1 & 2 (below) | ||||||||||||||||
sand | 85-88 % | Fine sand=0-17%, Coarse to medium sand=71-92 % | 85-88 % | 85-88 % | 85-88 % | 50-85 % | 50-70 | 40% | 85-88 % | 65% sand, 20% sand loam | 85-88 % | 70-88 % | 85-88 % | 50-80 % | 70-85 % (sandy loam) | 85-88 % | 66% | 60% (sandy loam) | ||
Fines(silt and clay) | 8-12 % | 8-12 % | 8-12 % | 7-12 % | 8-12 % | 10-15% (silt),3-10% (clay), both combined, max 20% | clay < 5% | 8-12 % | 8-12 % | 0-12 % silt, 0-2 % clay | Silt 40% , Clay 10% | 10-20% (silt), max. 10% (clay) | 8-12 % | |||||||
gravel | 15% | |||||||||||||||||||
Organic matter | 3-5 % | 3-5 % | 3-5 % | 3-5 % | 3-5 % | 5-10% | 5% | 30-40 % | 1-5 % | 2-5 % | 3-15 % | 3-5 % | 3-5 % | 2-10 % | 5-10 % | 2-5 % | 33% | 40% | ||
P-index value | 10-30 ppm | 12-30 ppm | 10-30 ppm | 10-30 | < 15 | |||||||||||||||
Soluble salts | < 2.0 mmhos/cm | |||||||||||||||||||
Cationic exchange capacity | > 10 meq/100 g | 10 meq/100 g | > 10 meq/100 g | > 10 meq/100 g | > 10 meq/100 g | > 5 meq/100 g | > 10 | > 5 | > 10 | > 10 | > 5 | |||||||||
pH | 5.5-7.5 | 5.5-7.5 | 5.5-7.5 | 5.5-7.5 | 5.5-7.5 | 5.5-7.5 | 6-8 | 6-7 | 6-8.5 (WQ blend) | 6-8 | 5.5-7.5 | |||||||||
Phosphorus | 10-30 ppm | Table 1 & 2 (below) | ||||||||||||||||||
Infiltration rate | > 25 mm/hr | > 25 mm/hr | > 25 mm/hr | > 25 mm/hr | ||||||||||||||||
Surface resistance | <= 110 PSI | |||||||||||||||||||
Sub-surface resistance | <= 260 PSI | |||||||||||||||||||
Saturated hydraulic conductivity , mm/hr | 25 min. | |||||||||||||||||||
P-Content | 10-30 | < 15 ppm | 7-23 mg/kg | |||||||||||||||||
Compost (optional) | 15-25% | 15% | ||||||||||||||||||
Gravel storage | ||||||||||||||||||||
Void space ratio | 0.4 | 0.4 | ||||||||||||||||||
Depth | min. 300 mm | min. 300 mm | min. 300 mm | |||||||||||||||||
Diameter(clear stone) | 50 mm | 50 mm | 50 mm | |||||||||||||||||
Pea gravel choking layer | depth (mm) | 100 | 100 | 100 | ||||||||||||||||
diameter (mm) | 3-10 | 3-10 | ||||||||||||||||||
Mulch | ||||||||||||||||||||
Depth | 75 mm | <=75 mm | 75 mm | 75 mm | 70-80 | |||||||||||||||
Overflow | ||||||||||||||||||||
Overflow invert above the filter bed surface | 150-250 | <= 250 mm | ||||||||||||||||||
Monitoring well | ||||||||||||||||||||
Vertical perforated pipe diameter | 100-150 mm | 100-150 mm | 100-150 mm | 100-150 mm | ||||||||||||||||
Underdrain | ||||||||||||||||||||
Required when infiltration rate | < 15 mm/hr | < 15 mm/hr | < 13 mm/hr | |||||||||||||||||
Diameter | min. 100 mm(200 mm recommended) | min. 100 mm, 200 mm is recommended | min. 200 mm | min. 100 mm(200 mm recommended) | 200 mm | 4 inches | ||||||||||||||
Depth above the gravel storage layer | 100 mm | 100 mm | ||||||||||||||||||
Available head beween the inflow point and the downstream stream drain invert | 1-1.5 m | 1-1.5 m | Typical CDA 0.1-2.5 acres of 100% IP(<0.5 no underdrain), alternative to checking layer is needle punched non-woven geotextile | |||||||||||||||||
Contributing drainage area | ||||||||||||||||||||
Typical | 100 m2 to 0.5 hectare | 100 m2 to 0.5 hectare | 0.5-2 acres preferred, max 5 acres, BR min. size 200 ft2 | 5 acres | ||||||||||||||||
Maximum recommended | 0.8 hectare | 0.8 hectare | ||||||||||||||||||
Setback from building Foundation(m) | 4 | 4 | 4 | 3 (clay), 5 (heavy clay) | see table 3 below | |||||||||||||||
(Impervious drainage/treatment facility) area | 5:1 to 15:1 | 5:1 to 15:1 | 5:1 to 15:1 | < 5:1 loading ratio (DA to IA, DA 100% IP) | SA of BR 3 to 6% of CDA | sized at 5-8 % of IPCDA | BR SA 3-6% of CDA | CDA < 5 acres | CDA < 2.5 acres | CDA < 5 acres | BR SA: 6-15 % of IP area | |||||||||
Contributing Slope (%) | 1-5 | 1-5 | >1 % and < 33% | |||||||||||||||||
Slope of the surface, % | <= 1% | |||||||||||||||||||
Water table depth | min. 1.0 m | min. 1.0 m | > 1.8 | 3 ft. | ||||||||||||||||
Outlet | min. 100 mm above the bottom of the facility | Difference in elevation between inflow and outflow =4-6 ft (when underdrain is used) | ||||||||||||||||||
Maximum ponding depth above the filter bed surface | 150-250 mm | 250 mm | 150-250 mm | 350 mm | 18 inch | |||||||||||||||
Facilties receiving road runoff are not located within time of travel | 2 | 2 | ||||||||||||||||||
wellhead protection areas, year | ||||||||||||||||||||
Drainage time of ponded water after the end of storm event , hr | 24 (48 recommd.) | < 48 (2 yr. design) | Max. 48 hr. | |||||||||||||||||
Inlet design for non-point source-grass filter buffer, m | 0.5-3.0 | |||||||||||||||||||
Surface area/Contributing drainage area, % | 10-20 % | 10-20 % | 3.0-30 % | (5-10)%- min. 200 ft2 | ||||||||||||||||
Contributing impervious area | < 4.0 ha. | ` | < 15000 ft2 | |||||||||||||||||
Facility flow velocity | < 0.3 m/s-planted area | <= 1 ft/sec, tree-shurb-mulch cell | ||||||||||||||||||
< 0.9 m/s- mulched zone | <= 3 ft/sec , grassed cell | |||||||||||||||||||
Discharge velocity (outlet point) | < 4 ft/sec | |||||||||||||||||||
Side slope (H:V) | 4:1 preferred(max 2:1) | 3:1 (H:V) | ||||||||||||||||||
Surface geometery (length/width) | 2:1 | |||||||||||||||||||
Infiltration trench (optional) | ||||||||||||||||||||
Depth, m | 0.5-1.0 | |||||||||||||||||||
Width, m | 1.0-6.0 | |||||||||||||||||||
Bottom slope, % | 0 | |||||||||||||||||||
C/N Ratio | 12:1-25:1 | |||||||||||||||||||