Site conditions: public lands

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Your LIDLow Impact Development. A stormwater management strategy that seeks to mitigate the impacts of increased urban runoff and stormwater pollution by managing it as close to its source as possible. It comprises a set of site design approaches and small scale stormwater management practices that promote the use of natural systems for infiltration and evapotranspiration, and rainwater harvesting. Project Team

Community members that use your municipal facility are a great resource for identifying site needs and providing ongoing volunteer support

Whether you are planning a small-scale or large-scale LIDLow Impact Development. A stormwater management strategy that seeks to mitigate the impacts of increased urban runoff and stormwater pollution by managing it as close to its source as possible. It comprises a set of site design approaches and small scale stormwater management practices that promote the use of natural systems for infiltration and evapotranspiration, and rainwater harvesting. retrofit project, your team should be comprised of project champions that promote the retrofit within your municipality and the community. The project manager should be a person who is familiar with the site and its maintenance and operations. The core project team will include a broad range of professionals with different fields of expertise and perspectives to support the project manager.

The core project team develops an overall plan and provides key information to assist the project manager with decision making. The project team also helps to identify staff, external organizations, and stakeholders who can provide information, advice, or professional expertise. For projects that require external support from consultants and contractors, the core team should be able to help with the development of the terms of reference, tender, or request for proposal (RFP).They should also review and comment on site design and assist with construction administration and oversight.

Team members must possess a comprehensive understanding of goals and targets associated with stormwater management, site function, and existing operations and maintenance at the site.

Most municipalities are fortunate to have departments that can support the retrofit process. You may consider looking to the following areas for project support:

  • Forestry and parks departments
  • Environmental services and stewardship
  • Engineering services
  • Capital works
  • Terrestrial and aquatic services
  • Geosciences (hydrology and hydrogeology)
  • Marketing and communications departments
  • Community services

The size of your team, as well as the type of expertise that is available will depend on the size of your municipality. Small municipalities may not have all the departments listed above. Support from consultants and partnering organization such as conservation authorities can help to get the work done. Operations staff are required team members since they will be most familiar with existing site maintenance practices. These members will have critical first-hand knowledge of what type(s) of LIDLow Impact Development. A stormwater management strategy that seeks to mitigate the impacts of increased urban runoff and stormwater pollution by managing it as close to its source as possible. It comprises a set of site design approaches and small scale stormwater management practices that promote the use of natural systems for infiltration and evapotranspiration, and rainwater harvesting. practices are best suited given current levels of service, or what changes may be required to accommodate new LIDLow Impact Development. A stormwater management strategy that seeks to mitigate the impacts of increased urban runoff and stormwater pollution by managing it as close to its source as possible. It comprises a set of site design approaches and small scale stormwater management practices that promote the use of natural systems for infiltration and evapotranspiration, and rainwater harvesting. retrofits.

Also consider what support or resources your project may receive from:

  • Councilors
  • Regional government
  • Your local conservation authority
  • Provincial staff

Forming community partnerships

Green features in your parking lot provide shade and evaporative cooling. This plays a role in reducing air temperatures on your site and making the walk from a car to your municipal facility a better experience during hot summer days
This dry hydrant is connected to a large subsurface cisternTank used to store rainwater (typically roof runoff) for later use.. This water supply can be used in emergency situations to fight fires on site. (Source: Aquafor Beech)

Municipal facilities are hubs for community groups, interest clubs and sports teams. Partnerships with these groups can help promote and fund your LIDLow Impact Development. A stormwater management strategy that seeks to mitigate the impacts of increased urban runoff and stormwater pollution by managing it as close to its source as possible. It comprises a set of site design approaches and small scale stormwater management practices that promote the use of natural systems for infiltration and evapotranspiration, and rainwater harvesting. retrofits. Community groups may have an interest in upgrading or beautifying facilities that they commonly use. Volunteer support and even funding from these groups may be possible, especially if the project achieves common goals.

Consultation with the public is probably not needed for projects that are unlikely to affect public use. Examples of LIDLow Impact Development. A stormwater management strategy that seeks to mitigate the impacts of increased urban runoff and stormwater pollution by managing it as close to its source as possible. It comprises a set of site design approaches and small scale stormwater management practices that promote the use of natural systems for infiltration and evapotranspiration, and rainwater harvesting. retrofit projects that do not require public consultation include implementing pollution prevention strategies around maintenance facilities, and installing rain barrels on your roof drains. However, for small-scale practices that are to be integrated into public use areas and have the potential to change usage patterns in the municipal facility, public consultation should occur.

LIDLow Impact Development. A stormwater management strategy that seeks to mitigate the impacts of increased urban runoff and stormwater pollution by managing it as close to its source as possible. It comprises a set of site design approaches and small scale stormwater management practices that promote the use of natural systems for infiltration and evapotranspiration, and rainwater harvesting. Opportunities at Municipal Facilities

Each distinct area of your site can be a source for runoffThat potion of the water precipitated onto a catchment area, which flows as surface discharge from the catchment area past a specified point.Water from rain, snow melt, or irrigation that flows over the land surface. (referred to as a ‘source areaThe land draining to a single reference point (usually a structural BMP); similar to a subwatershed, but on a smaller scale.’). These areas should be targeted when introducing LIDLow Impact Development. A stormwater management strategy that seeks to mitigate the impacts of increased urban runoff and stormwater pollution by managing it as close to its source as possible. It comprises a set of site design approaches and small scale stormwater management practices that promote the use of natural systems for infiltration and evapotranspiration, and rainwater harvesting. in your municipal facility.

Targeting Hard Surfaces

Municipal facilities have large parking lots to accommodate public demand. Parking areas represent the most significant source of pollutant loadingThe total mass of a pollutant entering a waterbody over a defined time period.The net amount of something (e.g. chemical, such as phosphorus), calculated as the product of concentration and volume in a given time. Some BMPs significantly reduce loading of pollutants to the environment by reducing volume more so than concentration. from these sites and contribute significantly to increased runoffThat potion of the water precipitated onto a catchment area, which flows as surface discharge from the catchment area past a specified point.Water from rain, snow melt, or irrigation that flows over the land surface. rates in comparison to natural conditions. Parking lots include areas for parking, areas for driving, and islands or landscape planters used for calming traffic, directing vehicles, and improving pedestrian safety.

LIDLow Impact Development. A stormwater management strategy that seeks to mitigate the impacts of increased urban runoff and stormwater pollution by managing it as close to its source as possible. It comprises a set of site design approaches and small scale stormwater management practices that promote the use of natural systems for infiltration and evapotranspiration, and rainwater harvesting. practices can be incorporated into all areas of a parking lot. You can use bioretentionA shallow excavated surface depression containing prepared filter media, mulch, and planted with selected vegetation. in parking lot islands and along the lot perimeter. Standard curbs with small cut-outs (called ‘curb cuts’) can allow water to easily enter biorentention practices while also preventing damage from cars.

BioswalesLinear bioretention cell designed to convey, treat and attenuate stormwater runoff. The engineered filter media soil mixture and vegetation slows the runoff water to allow sedimentation, filtration through the root zone, evapotranspiration, and infiltration into the underlying native soil. can also be located in parking lot islands or along lot perimeters. Parking lots with existing perimeter ditching are ideal for bioswaleLinear bioretention cell designed to convey, treat and attenuate stormwater runoff. The engineered filter media soil mixture and vegetation slows the runoff water to allow sedimentation, filtration through the root zone, evapotranspiration, and infiltration into the underlying native soil. integration due to their extended continuous flow path.

Prefabricated modular infiltration chambers are gaining acceptance for their easy integration with parking lot functions. These subsurface systems are typically installed over a coarse granularGravel, or crushed stone of various size gradations (i.e., diameter), used in construction; void forming material used as bedding and runoff storage reservoirs and underdrains in stormwater infiltration practices. reservoir to provide storage and allow infiltration into native soils. Infiltration chambers under conventional asphaltA mixture of mineral aggregates bound with bituminous materials, used in the construction and maintenance of paved surfaces. system work well on sites where parking demand and other site uses do not allow space for a stormwater feature.

BioretentionA shallow excavated surface depression containing prepared filter media, mulch, and planted with selected vegetation. planters beautify this building entrance. The entrance receives a lot of traffic during business hours, making it an ideal location for a high visibility LIDLow Impact Development. A stormwater management strategy that seeks to mitigate the impacts of increased urban runoff and stormwater pollution by managing it as close to its source as possible. It comprises a set of site design approaches and small scale stormwater management practices that promote the use of natural systems for infiltration and evapotranspiration, and rainwater harvesting. practice. (Source: Aquafor Beech)

Permeable pavementAn alternative practice to traditional impervious pavement, prevents the generation of runoff by allowing precipitation falling on the surface to infiltrate through the surface course into an underlying stone reservoir and, where suitable conditions exist, into the native soil. can also be integrated in large municipal parking lots. Pervious concrete, permeable interlocking concrete pavers, and porous asphaltA mixture of mineral aggregates bound with bituminous materials, used in the construction and maintenance of paved surfaces. can detain stormwater and increase infiltrationThe slow movement of water into or through a soil or drainage system.Penetration of water through the ground surface..

There are also excellent opportunities to integrate rainwater harvestingThe practice of intercepting, conveying and storing rainwater for future use. Captured rainwater is typically used for outdoor non-potable water uses such as irrigation, or in the building to flush toilets. systems in many municipal facilities. Rainwater harvestingThe practice of intercepting, conveying and storing rainwater for future use. Captured rainwater is typically used for outdoor non-potable water uses such as irrigation, or in the building to flush toilets. systems have two requirements: an area for catchmentThe land draining to a single reference point (usually a structural BMP); similar to a subwatershed, but on a smaller scale. of relatively clean runoffThat potion of the water precipitated onto a catchment area, which flows as surface discharge from the catchment area past a specified point.Water from rain, snow melt, or irrigation that flows over the land surface., and a nearby demand for water usage. Municipal facilities often have large rooftop areas that produce relatively clean runoffThat potion of the water precipitated onto a catchment area, which flows as surface discharge from the catchment area past a specified point.Water from rain, snow melt, or irrigation that flows over the land surface.. Installing a cisternTank used to store rainwater (typically roof runoff) for later use. either internal to the building or buried adjacent to the building can provide a sustainable source of water for site irrigationHuman application of water to agricultural or recreational land for watering purposes. City of Toronto Wet Weather Flow Management November 2006 47 needs, including landscaped areas and recreational fields, as well as indoor use for flushing toilets and urinals.