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Engineering Vegetated Roof Systems to Optimize Stormwater Management

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Feb 9
Engineering Vegetated Roof Systems to Optimize Stormwater Management Next Level Stormwater Management Feb 9, 2022 : 10:00 am to 11:00 am

Urban centres have high concentrations of impervious areas which pose a challenge in managing large volumes of stormwater. Heavy rain events or back-to-back storms cause problems like flooding, property damage, and combined overflow sewer discharge. Green infrastructure, such as vegetated roofs, can help mitigate these problems because they restore the hydrologic cycle in urbanized areas. Vegetated roof systems designed for maximum stormwater management decrease the volume of stormwater within the urban core and reliably delay travel time of stormwater to the treatment plant. These retention and detention strategies help alleviate the burden of heavy stormwater on our cities’ infrastructure. LACES Approved; 1 PDH

Learning Objectives:

  1. The distinction between stormwater retention and detention
  2. The importance of detention in urban centres (ie Greater Toronto/Vancouver Area)
  3. Existing roof top technologies
  4. Using biomimicry to re-engineer vegetated roofing system
  5. Collaboration: Landscape Architects, Architects, Civil Engineers


Karen Liu, PhD Green Roof Specialist

James Weldon, GRP Technical Sales & Design Consultants


1 Yonge St. Ste 1801
Toronto, ON M5E 1W7
(416) 637-5772 x1
Click to view background photo & credits
Project: Telus Atrium Garden
Landscape Architect / Firm: Sharp & Diamond Landscape Architecture Inc in collaboration with Cornelia Hahn Oberlander
Location: Vancouver, British Columbia
Photo Credit: Brett Hitchins