Changes

STEP/TRCA conducted a hydrologic monitoring and modelling study of the site in 2012/13 with researchers from The Metropolitan University to assess runoff volume and peak flow reductions.  Results showed that, relative to a conventional stormwater approach without LID, runoff was reduced over the study period by between 30% and 35% for the entire site, and by between 58 and 62% in the catchment with a higher density of LID practices.  Peak flows were also reduced by 73 to 78%.  In the Northeast catchment, 20% of [[Rainwater Harvesting|rainfall harvested]] from the roof was stored and reused for irrigation during the summer months.  This reuse volume represented 6% of total site rainfall over 8 months.  A hydrologic model calibrated using monitored data showed that the stormwater management system met the design objective of providing quantity control for the post development 100 year storm.

STEP/TRCA conducted a hydrologic monitoring and modelling study of the site in 2012/13 with researchers from The Metropolitan University to assess runoff volume and peak flow reductions.  Results showed that, relative to a conventional stormwater approach without LID, runoff was reduced over the study period by between 30% and 35% for the entire site, and by between 58 and 62% in the catchment with a higher density of LID practices.  Peak flows were also reduced by 73 to 78%.  In the Northeast catchment, 20% of [[Rainwater Harvesting|rainfall harvested]] from the roof was stored and reused for irrigation during the summer months.  This reuse volume represented 6% of total site rainfall over 8 months.  A hydrologic model calibrated using monitored data showed that the stormwater management system met the design objective of providing quantity control for the post development 100 year storm.

===Example 2: [https://sustainabletechnologies.ca/app/uploads/2020/06/Wychwood-Report.pdf Wychwood Subdivision in Brampton]===

===Example 2: [https://sustainabletechnologies.ca/app/uploads/2020/06/Wychwood-Report.pdf Wychwood Subdivision in Brampton]===

*Event greater than 30 mm showed peak flow reductions of 74%, with a total volume reduction of 59%  

*Event greater than 30 mm showed peak flow reductions of 74%, with a total volume reduction of 59%  

*Modelling pre and post development peak flow rates indicated that peak flow targets were met for the 2 to 50 year storms but post development peak flows were *10% greater than pre development peak flows for the 100 year storm.

*Modelling pre and post development peak flow rates indicated that peak flow targets were met for the 2 to 50 year storms but post development peak flows were *10% greater than pre development peak flows for the 100 year storm.

===Example 3: Costco Distribution Centre===

===Example 3: Costco Distribution Centre===

#Final design required both LIDs to reduce the overall runoff volumes, but also sub-surface storage chambers to provide quantity control for rare storm events up to the 100-year design storm. Due to large area required for truck parking, limited opportunities for more landscaping to promote [[evapotranspiration]], runoff volumes increased beyond ability of LIDs to negate the need for quantity control.

#Final design required both LIDs to reduce the overall runoff volumes, but also sub-surface storage chambers to provide quantity control for rare storm events up to the 100-year design storm. Due to large area required for truck parking, limited opportunities for more landscaping to promote [[evapotranspiration]], runoff volumes increased beyond ability of LIDs to negate the need for quantity control.

===Example 4. [https://sustainabletechnologies.ca/app/uploads/2020/12/SmartBlueRoofSTEPTechBrief_Dec2020.pdf Smart Blue Roof System]===

 

[[Blue roofs]] are emerging as an innovative rooftop stormwater management solution that provides flood protection and drought resistance. Instead of quickly conveying stormwater away from a property, blue roof systems temporarily capture rainwater until it either evaporates from the rooftop or is sent to rainwater harvesting storage tanks. A Smart Blue Roof was piloted at the CVC head office in Mississauga.

===Example 4. [https://sustainabletechnologies.ca/app/uploads/2020/12/SmartBlueRoofSTEPTechBrief_Dec2020.pdf Smart Blue Roof System at CVC Head Office]===

[[Blue roofs]] are emerging as an innovative rooftop stormwater management solution that provides flood protection and drought resistance. Instead of quickly conveying stormwater away from a property, blue roof systems temporarily capture rainwater until it either evaporates from the rooftop or is sent to rainwater harvesting storage tanks. A Smart Blue Roof was piloted at the CVC head office in Mississauga. Smart roofs are fitted with weather forecasting algorithms via internet connectivity and automated valves to regulate water discharge from the roof.  

'''Stormwater Management Criteria'''

'''Stormwater Management Criteria'''

*Quantity Control –

*Quantity Control – the rooftop can hold up to 180 mm of precipitation, thus capturing the 100-year storm

*Water Balance – water either evaporates from the rooftop, is sent to rainwater harvesting tank for reuse (can meet non-potable water demands of 8.84 m3/day), or gradually flows into the municipal stormwater system

*Water Balance –

*Erosion Control – temporary detention and slow release

*Erosion Control –

'''Stormwater Management Strategy'''

'''Stormwater Management Strategy'''

#

# Smart blue roof systems can regulate rooftop runoff by storing and controlling the release of rainwater

#

# In addition to peak flow control, blue roof systems can facilitate runoff reduction through rainwater reuse and evaporative rooftop cooling

 

===Example 5: ===

===Example 5: ===