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LID opportunities in industrial, commercial and multi-residential types (view source)
Revision as of 18:28, 26 September 2017
, 6 years agono edit summary
==Large commercial sites==
==Large commercial sites==
[[File:Large_Commercial_Options.png|thumb|LID options for large commercial sites]]
Large commercial sites include big box stores, warehouses, and shopping malls. These sites are often located in highly urbanized commercial centres. They are commonly owned and operated by land management companies.
Large commercial sites include big box stores, warehouses, and shopping malls. These sites are often located in highly urbanized commercial centres. They are commonly owned and operated by land management companies.
Large commercial sites are rarely more than two storeys in height. These sites typically have large parking lots that may be underused. Roof areas are often fl at and drain internally through the building to onsite storm sewers. Though these sites are expansive, they rarely have complex networks of pedestrian walkways and often rely on vehicular traffic to get site users onsite.
Large commercial sites are rarely more than two storeys in height. These sites typically have large parking lots that may be underused. Roof areas are often flat and drain internally through the building to onsite storm sewers. Though these sites are expansive, they rarely have complex networks of pedestrian walkways and often rely on vehicular traffic to get site users onsite.
===Parking areas===
===Parking areas===
The roof areas of large commercial buildings account for large impervious surfaces. Controlled roof drains have become a widely utilized tool for stormwater management with the commercial development industry. While these devices do attenuate flows, they do not significantly reduce runoff volumes. By simply directing roof runoff to a soakaway pit, you can provide a great amount of volumetric stormwater control. Consider going one step further and storing this water in a cistern for future use. Commercial rooftops are relatively clean and complex filtration is not required prior to most
The roof areas of large commercial buildings account for large impervious surfaces. Controlled roof drains have become a widely utilized tool for stormwater management with the commercial development industry. While these devices do attenuate flows, they do not significantly reduce runoff volumes. By simply directing roof runoff to a soakaway pit, you can provide a great amount of volumetric stormwater control. Consider going one step further and storing this water in a cistern for future use. Commercial rooftops are relatively clean and complex filtration is not required prior to most
non-potable uses.
non-potable uses.
==Small commercial sites==
[[File:Small_Commercial_Sites_Options.png|thumb|LID options for small commercial sites]]
Small commercial sites include strip malls, small private enterprises, car dealerships, and residential sites converted to commercial facilities. While site features can vary significantly
with these small sites, typical features include small parking areas and limited pedestrian and common areas. On these sites roof areas can be fl at with internal drainage or peaked with external drainage.
These sites can be owned and operated by the site user, though land management companies also own and operate a significant portfolio of small commercial sites in Ontario.
===Landscaped areas===
Landscaped area retrofits on small commercial sites are limited due to high impervious surface coverage. Landscaped areas can often be found near the site perimeter. Where open channel conveyance systems like ditches and swales exist, bioswales are often a suitable retrofit option. Bioretention
may also be a suitable option along green site perimeter areas. On many sites, drainage will be conveyed towards site perimeters/away from the building. This allows for the capture of parking lot runoff.
===Roof areas===
The roof areas of small commercial buildings account for large impervious surfaces. Whether internal or external roof drains are present, rainwater harvesting is a viable option to achieve water balance benefits. Harvested water can be used for most outdoor uses including irrigation and pressure washing of hard surfaces. Indoor non-potable uses like toilet flushing can most easily be integrated into flat-roof systems with internal roof drainage pipes.
Small commercial building roofs offer excellent opportunities to intercept runoff. Directing roof leaders to bioretention areas, soakaways or even permeable pavement is an option. Alternatively, you could establish a green roof or collect water with a rainwater harvesting system and use it for onsite irrigation or other non-potable uses.
===Parking areas===
Like large commercial sites, parking patterns on small commercial sites will include areas of high use that are close to the buildings, as well as areas that are used only during periods of peak demand. Due to lower vehicle speeds and fewer heavy loads, parking lots are ideal locations for
permeable pavement installations. Bioretention areas may also be located in parking lot areas and are typically enclosed by curbing. Runoff from parking lots can also be directed to LID practices external to the parking lot areas such as perimeter bioswales or soakaways. Infiltration chambers can also be placed under parking lots to provide infiltration or required detention volumes for roof and/or parking areas. Utilities may be buried within parking lots. These are frequently electrical
lines for parking lot lighting. Locates are required before digging occurs.