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Line 59: − − − − − − Large-scale projects require significantly more effort, budget, − and staff than small-scale projects. Large-scale LID retrofits − include: − * Bioretention − * Enhanced grass swales − * Bioswales − * Perforated pipe systems − * Permeable pavement − * Soakaways − * Infiltration chambers − * Rainwater harvesting (excluding rain barrels) − * Prefabricated modules − * Green roofs − − Consider a large-scale project if your municipality or − department would like to be a leader in sustainability. Large-scale − projects are often highly visible and attract more public − attention. Large-scale projects may also be the only solution − to site-specific challenges. For example, if site infrastructure − is at risk as a result of urban flooding, LID practices that detain − large volumes of runoff and encourage infiltration are the − most viable LID options. − Before starting a large-scale retrofit project, consider the − following distinctions that set these retrofits apart from small-scale − projects. − − ===Integration with capital works programs=== − − Most large-scale LID retrofits must function with existing − site infrastructure, such as storm sewers, catch basins, − and pavement systems. The construction of large-scale − LID practices often requires these systems to be removed, − exposed, or replaced. The best time for this type of project to − occur is when an infrastructure replacement or rehabilitation − project is already planned. − − When LID retrofits are worked into other construction − projects, such as parking lot repaving, or grading or drainage − improvements, there can be substantial cost savings. − Whether big or small, every municipality spends relatively − large sums of money and substantial time planning for − major capital projects. This includes redevelopment of public − building and spaces. Many communities who have undertaken − retrofits recognize that even if a relatively small portion of the − project funds goes towards LID retrofits, they can retrofit large − impervious surfaces and avoid new stormwater management − infrastructure projects17. − − Municipal facility rehabilitation is typically forecast well in − advance of the project. Parking lot paving is typically worked − into municipal budgets based on expected life cycle and − observed wear. As such, funds may be set aside prior to − the project planning phases. Long-term forecast budgets − may also be available for site revitalizations or expansions. − These budget forecasts provide opportunities to compare the − capital and life-cycle costs and benefits of the conventional − construction project and LID retrofit.
LID opportunities at municipal facilities (view source)
Revision as of 18:35, 6 August 2020
, 3 years ago→Targeting hard surfaces
[[File:Bioretention_Planters_1.jpeg|thumb|[[Stormwater planters]] beautify this building entrance. The entrance receives a lot of traffic during business hours, making it an ideal location for a high visibility LID practice. (Source: Aquafor Beech)]]
[[File:Bioretention_Planters_1.jpeg|thumb|[[Stormwater planters]] beautify this building entrance. The entrance receives a lot of traffic during business hours, making it an ideal location for a high visibility LID practice. (Source: Aquafor Beech)]]
[[Permeable paving]] is also an option in large municipal parking lots. Pervious concrete, permeable interlocking concrete pavers, and porous asphalt can detain stormwater and increase infiltration.
[[Permeable pavements]] are also an option in large municipal parking lots. Pervious concrete, permeable interlocking concrete pavers, and porous asphalt can detain stormwater and increase infiltration.
Municipal facilities provide excellent opportunities for integrating [[rainwater harvesting]] systems. Rainwater harvesting systems have two requirements: an area for catchment of relatively clean runoff and a nearby demand for water usage. Municipal facilities often have large rooftop areas producing relatively clean runoff. Installing a cistern internal to the building or buried adjacent to the building can provide a sustainable source of water for site irrigation needs for landscaped areas, recreational fields and indoor use (e.g. flushing toilets and urinals).
Municipal facilities provide excellent opportunities for integrating [[rainwater harvesting]] systems. Rainwater harvesting systems have two requirements: an area for catchment of relatively clean runoff and a nearby demand for water usage. Municipal facilities often have large rooftop areas producing relatively clean runoff. Installing a cistern internal to the building or buried adjacent to the building can provide a sustainable source of water for site irrigation needs for landscaped areas, recreational fields and indoor use (e.g. flushing toilets and urinals).
=== Targeting pollution prevention opportunities ===
=== Targeting pollution prevention opportunities ===
On some municipal sites, pollution prevention techniques and strategies outlined in Chapter 2 are the best approaches to mitigating the environmental impact of your site. Retrofits of municipal works yards require a different approach than other land uses discussed in this guide. Works yards do not offer substantial opportunities for public interaction. LID retrofits should focus primarily on reducing pollution generated on-site. Fuelling stations, waste storage areas, truck washing stations, sand and salt storage, staging areas and water conveyance features are ideal for
On some municipal sites, [[Pollution prevention|pollution prevention]] techniques and strategies are the best approaches to mitigating the environmental impact of your site. Retrofits of municipal works yards require a different approach than other land uses discussed in this guide. Works yards do not offer substantial opportunities for public interaction. LID retrofits should focus primarily on reducing pollution generated on-site. Fueling stations, waste storage areas, truck washing stations, sand and salt storage, staging areas and water conveyance features are ideal for pollution prevention.
pollution prevention.
=== Source areas ===
=== Source areas ===
(** = Common, * = Possible, o = Unusual)
(** = Common, * = Possible, o = Unusual)
! Source area
! Source area
! [[Permeable pavement]]
! [[Permeable pavements]]
! [[Bioretention]]
! [[Bioretention]]
! [[Enhanced grass swales]] / [[Bioswales|bioswales]]
! [[Enhanced grass swales]] / [[Bioswales|bioswales]]
! [[Green roofs]]
! [[Green roofs]]
![[Soakaways, Infiltration Trenches and Infiltration Chambers Guide| Soakaways]] and [[Infiltration trenches|infiltration trenches]]
! Soakaways and [[Infiltration chambers|infiltration chambers]]
! [[Exfiltration trenches|Perforated pipe systems]]
! [[Exfiltration trenches|Perforated pipe systems]]
! [[Rainwater harvesting]]
! [[Rainwater harvesting]]
|style="text-align: left;" |Building || * || * || * || ** || ** || * || ** || o || o || **
|style="text-align: left;" |Building || * || * || * || ** || ** || * || ** || o || o || **
|}
|}
[[Category:Planning]]
[[Category:Planning]]