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ALiDP - City of Edmonton Fall Training Event, November 25, 2013 Slowing Down On Green Roofs Presented on behalf of Greater Edmonton Green Roof Consortium.

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Presentation on theme: "ALiDP - City of Edmonton Fall Training Event, November 25, 2013 Slowing Down On Green Roofs Presented on behalf of Greater Edmonton Green Roof Consortium."— Presentation transcript:

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

2 Engage. Innovate. Inspire. Slowing Down On Green Roofs Reduce Peak Flow Delay Peak Flow Reduce Total Runoff

3 Engage. Innovate. Inspire. Slowing Down On Green Roofs Source: ca Or With Green Roof Delay & Reduce Peak Flow

4 Engage. Innovate. Inspire. Slowing Down On Green Roofs Reduce Total Runoff Source: environmentalsciencesociety. org

5 Engage. Innovate. Inspire. Slowing Down On Blue Roof Source: org Source: Alumasc Roof Discharge Downstream Storm Sewer or Combined Sewer

6 Engage. Innovate. Inspire. Slowing Down On Blue Roof Source: org DETENTION AND EVAPORATION OFFERED BY BLUE ROOFS

7 Engage. Innovate. Inspire. Slowing Down On Green Roofs Green Roof: TypesGreen Roof: Types Intensive : > 8, $$$$$ Extensive: 2 – 8, $$, 17 – 50 lbs/sf Built-up or Tray Systems Source: org Source: org INTENSIVE SEMI-INTENSIVE EXTENSIVE

8 Engage. Innovate. Inspire. Slowing Down On Green Roofs Green Roof: detention, evaporation, infiltration, percolation, evapotranspiration,... Water designed to flow through medium vertically before laterally along drainage layer. Source: com Source: environmentalsciencesociety. org VEGETATION GROWING MEDIUM FILTER / ROOT BARRIER DRAINAGE INSULATION WATER- PROOFING STRUCTURE

9 Engage. Innovate. Inspire. 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: environmentalsciencesociety. orgSource: com

10 Engage. Innovate. Inspire. Slowing Down On Green Roofs Green Roof: detention, evaporation, infiltration, percolation, evapotranspiration... Source: edu

11 Engage. Innovate. Inspire. Slowing Down On Green Roofs Green Roof: detention, evaporation, infiltration, percolation, evapotranspiration... Source: com

12 Engage. Innovate. Inspire. Slowing Down On Green Roofs Green Roof: detention, evaporation, infiltration, percolation, evapotranspiration, retention Source: Paul MJ & Meyer JL, and USEPA

13 Engage. Innovate. Inspire. Slowing Down On Green Roofs Green Roof: detention, evaporation, infiltration, percolation, evapotranspiration, retention Source:environmentalsciencesociety. org

14 Engage. Innovate. Inspire. Slowing Down On Green Roofs Source: Hydrological performance of extensive green roofs in New York City: observations and multi-year modeling of three full-scale systems. T B Carson et al 2013 Environ. Res. Lett doi: / /8/2/024036

15 Engage. Innovate. Inspire. Slowing Down On Green Roofs Source: enr.construction. com

16 Engage. Innovate. Inspire. Slowing Down On Green Roofs Source: enr.construction. com

17 Engage. Innovate. Inspire. Slowing Down On Green Roofs Source: com

18 Engage. Innovate. Inspire. Slowing Down On Green Roofs Source: prairieecosystems.pbworks. com

19 Engage. Innovate. Inspire. Slowing Down On Green Roofs Green Roofs: with cisterns or harvestingGreen Roofs: with cisterns or harvesting Source: jp

20 Engage. Innovate. Inspire. Slowing Down On Green Roofs Source: nusdeltares. org

21 Engage. Innovate. Inspire. Slowing Down On Green Roofs Green Roof: Effects of Rain Duration & IntensitiesGreen Roof: Effects of Rain Duration & Intensities Source: uregina. ca (modified)

22 Engage. Innovate. Inspire. Slowing Down On Green Roofs Green Roof: Runoff Quality & Pollution ControlGreen Roof: Runoff Quality & Pollution Control Source: net

23 Engage. Innovate. Inspire. Slowing Down On Green Roofs

24 Engage. Innovate. Inspire. Slowing Down On Green Roofs

25 Engage. Innovate. Inspire. Slowing Down On Green Roofs

26 Engage. Innovate. Inspire. Slowing Down On Green Roofs

27 Engage. Innovate. Inspire. Slowing Down On Green Roofs Source:

28 Engage. Innovate. Inspire. Slowing Down On Green Roofs

29 Engage. Innovate. Inspire. Slowing Down On Green Roofs

30 Engage. Innovate. Inspire. Slowing Down On Green Roofs

31 Engage. Innovate. Inspire. Slowing Down On Green Roofs

32 Engage. Innovate. Inspire. Slowing Down On Green Roofs Shortgrass Stormwater Retention Transpirative Cooling Pollutant Removal BiodiversitySedum Light Weight Components Low Maintenance Drought Resistant Source:

33 Engage. Innovate. Inspire. Slowing Down On Green Roofs

34 Engage. Innovate. Inspire. Slowing Down On Green Roofs Impact of Green Roofs on Urban Catchment

35 Engage. Innovate. Inspire. Slowing Down On Green Roofs

36 Engage. Innovate. Inspire. Slowing Down On Green Roofs Design Tools and Guidelines ? Listen to Bert tomorrow !

37 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 THANK YOU


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