2013 ALiDP Edmonton Training - "Slowing Down on Green Roofs"
1. ALiDP - City of Edmonton Fall Training Event, November 25, 2013
Slowing Down On Green Roofs
Presented on behalf of Greater Edmonton Green Roof Consortium
Wilma Leung
CEng, MICE, LEED-AP
Email: wleung@williamsengineering.com
2. Slowing Down On Green Roofs
Peak Flow Attenuation and
Volume Reduction
Engage. Innovate. Inspire.
3. Slowing Down On Green Roofs
Peak Flow Attenuation
Or With Green
Roof
Source: www.ec.gc. ca
Engage. Innovate. Inspire.
4. Slowing Down On Green Roofs
Volume Reduction
Source: environmentalsciencesociety. org
Engage. Innovate. Inspire.
5. Slowing Down On
Blue Roof
Source: www.perviouspavement. org
Source: Alumasc
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6. Slowing Down On
Blue Roof
Source: www.perviouspavement. org
DETENTION AND
EVAPORATION OFFERED
BY BLUE ROOFS
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7. Slowing Down On Green Roofs
Green Roof: Types
Source: www.wbdg. org
Source: www.salinitymanagement. org
INTENSIVE
SEMI-INTENSIVE
EXTENSIVE
Intensive : > 8”, $$$$$
Extensive: 2” – 8”, $$, 17 – 50 lbs/sf
Built-up or Tray Systems
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8. Slowing Down On Green Roofs
Green Roof: detention, evaporation, infiltration, percolation,
evapotranspiration, . . . Water designed to flow through medium
vertically before laterally along drainage layer.
VEGETATION
GROWING
MEDIUM
FILTER / ROOT
BARRIER
DRAINAGE
INSULATION
WATERPROOFING
STRUCTURE
Source: www.greenroofplan. com
Engage. Innovate.
Source: environmentalsciencesociety. org
Inspire.
9. Slowing Down On Green Roofs
Green Roof: detention, evaporation, infiltration, percolation,
evapotranspiration, . . . Water designed to flow through medium
vertically before laterally along drainage layer.
Special design considerations needed when designing a pitched
green roof to preserve hydrological benefits of green roof.
Source: www.hydrotechusa. com
Engage. environmentalsciencesociety. org
Source: Innovate. Inspire.
10. Slowing Down On Green Roofs
Green Roof: detention, evaporation, infiltration,
percolation, evapotranspiration. . .
Source: www.princeton. edu
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11. Slowing Down On Green Roofs
Green Roof: detention, evaporation, infiltration,
percolation, evapotranspiration. . .
Source: www.emeraldinsight. com
Engage. Innovate. Inspire.
12. Slowing Down On Green Roofs
Green Roof: detention, evaporation, infiltration,
percolation, evapotranspiration. . .
Source: Kean University
Engage. Innovate. Inspire.
13. Slowing Down On Green Roofs
Green Roof:
detention,
evaporation,
infiltration,
percolation,
evapotranspiration,
retention
Source: Paul MJ & Meyer JL, and USEPA
Engage. Innovate. Inspire.
14. Slowing Down On Green Roofs
Green Roof: detention, evaporation, infiltration, percolation,
evapotranspiration, retention
Engage. Innovate. Inspire.
Source:environmentalsciencesociety. org
15. Slowing Down On Green Roofs
Source:
Hydrological performance of extensive green roofs in New York City: observations and multi-year modeling of
Engage.
three full-scale systems. T B Carson et al 2013 Environ. Res. Lett. 8 024036 doi:10.1088/1748-9326/8/2/024036
Innovate. Inspire.
16. Slowing Down On Green Roofs
Green Roof: detention, evaporation, infiltration, percolation,
evapotranspiration, retention
Engage.
Source: enr.construction. com
Innovate. Inspire.
17. Slowing Down On Green Roofs
Green Roof: detention, evaporation, infiltration,
percolation, evapotranspiration, retention
Engage. Innovate.
Source: enr.construction. com
Inspire.
18. Slowing Down On Green Roofs
Source: www.emeraldinsight. com
Engage. Innovate. Inspire.
19. Slowing Down On Green Roofs
Source: prairieecosystems.pbworks. com
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20. Slowing Down On Green Roofs
Green Roofs: with cisterns or harvesting
Source: www.ce.t.kyoto-u.ac. jp
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21. Slowing Down On Green Roofs
Source: nusdeltares. org
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22. Slowing Down On Green Roofs
Green Roof: Effects of Rain Duration & Intensities
Source: uregina. ca (modified)
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23. Slowing Down On Green Roofs
Green Roof: Runoff Quality & Pollution Control
Source: www.lid-stormwater. net
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29. Slowing Down On Green Roofs
Design Tools and Guidelines ?
Listen to Bert tomorrow !
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30. THANK YOU
ALiDP - City of Edmonton Fall Training Event, November 25, 2013
Slowing Down On Green Roofs
Presented on behalf of Greater Edmonton Green Roof Consortium
Wilma Leung
CEng, MICE, LEED-AP
Email: wleung@williamsengineering.com
Editor's Notes
Waterproofing, Thermal properties, Material Elasticity & Durability
Waterproofing, Thermal properties, Material Elasticity & Durability
Our latest project with Amer Jordan Architects “Living Roofs Business Centre”We’ll come back to these two examples at the end.
