This webinar presents findings from a three-year field monitoring study comparing the run-off characteristics of simulated lawn test plots receiving roof drainage, located at the Kortright Centre in Vaughan, Ontario.
This webinar is being offered as part of the TRIECA 2020 Webinar Series.
PRESENTATION OVERVIEW
Draining roof run-off to pervious landscaped areas like the lawns and garden beds around our properties is standard practice in most communities. Yet few studies have been done to quantify the runoff reduction benefit of simple roof downspout disconnection, nor to understand how planting soil depth and organic matter content affects how absorbent urban landscapes are to stormwater.
This webinar presents findings from a three-year field monitoring study comparing the run-off characteristics of simulated lawn test plots receiving roof drainage, located at the Kortright Centre in Vaughan, Ontario.
Outflow from each of the four 20 square metre test plots was measured during both natural and simulated rain events and used to calculate run-off coefficients for each simulated lawn. Hydrologic models (SWMM5) of each roof and simulated lawn area were developed and calibrated with the field monitoring data and used to predict average annual run-off reduction performance.
Scenario modelling and analysis was performed to examine how varying planting soil depth and impervious (roof) to pervious (lawn) area ratio affects run-off reduction performance. Results are compared to recent research literature.