Changes

;Dry swale

;Dry swale

;Bioswale

;Bioswale

:Linear 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

:Linear 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.

underlying native soil.

;Evapotranspiration

;Evapotranspiration

:A hybrid neighbourhood and district layout model that combines the geometries of inner city grid road patterns with the loop and cul-de-sac road patterns of conventional suburbs.

:A hybrid neighbourhood and district layout model that combines the geometries of inner city grid road patterns with the loop and cul-de-sac road patterns of conventional suburbs.

;Granular

:Gravel, 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.

<li>Geotextile: A filter fabric that is installed to separate dissimilar soils and provide runoff filtration and contaminant removal benefits while maintaining a suitable rate of flow; may be used to prevent fine-textured soil from entering a coarse granular bed, or to prevent coarse granular from being compressed into underlying finer-textured soils.</li>

<li>Granular: Gravel, 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.</li>

A parameter that describes the capability of a medium to transmit water.

The circulation of water from the atmosphere to the earth and back, through

:A level spreading device placed at a runoff discharge location, perpendicular to flow, to maintain sheet flow and distribute runoff as evenly as possible across a pervious area or stormwater infiltration practice. A gravel diaphragm acts as a pretreatment device, settling out suspended sediments before they reach the practice.

precipitation, runoff, infiltration, groundwater flow and evapotranspiration.

The characteristic pattern of precipitation, runoff, infiltration and evaporation

:A thin layer of vegetation and growing medium installed on top of a conventional flat or sloped roof, also referred to as living roofs or rooftop gardens.

affecting the hydrology of a system.

=== Hydrologic Soil Groups ===

A soil classification system based on the ability to convey and store

water; divided into four groups:

 

 

 

 

;Hydrologic cycle

 

 

:A soil classification system based on the ability to convey and store water; divided into four groups:

A – well drained sands and gravel, high infiltration capacity, high leaching potential and low

A – well drained sands and gravel, high infiltration capacity, high leaching potential and low

potential.

potential.

;Infiltration

:Penetration of water through the ground surface.

 

=== Infiltration ===

Penetration of water through the ground surface.

 

 

 

 

;Landscape-based approach:

:The principle that development form, servicing and stormwater management strategies should be defined by the biophysical, hydrological and ecological attributes of the landscape.

<li>Landscape-based approach:

The principle that development form, servicing and stormwater

management strategies should be defined by the biophysical, hydrological and ecological

attributes of the landscape.

=== Lot Level ===

;Lot level

The treatment of urban runoff as close to the source area as possible through

:The treatment of urban runoff as close to the source area as possible through application of small scale stormwater management practices on individual properties that are linked to downstream conveyance and end-of-pipe practices.

application of small scale stormwater management practices on individual properties that are

linked to downstream conveyance and end-of-pipe practices.

=== Low Impact Development ===

;Low impact development

A stormwater management strategy that seeks to mitigate the

: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

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

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.

evapotranspiration, and rainwater harvesting.

=== Master Environmental Servicing Plan (MESP) ===

;MESP

Is a community-scale planning assessment of

:Is a community-scale planning assessment of servicing and environmental considerations for a development project.

servicing and environmental considerations for a development project.

 

 

 

 

 

 

 

 

 

and handling areas for hazardous materials and some heavy industry sites).

The total mass of a pollutant entering a waterbody over a defined time period.

:Shredded woody material or leaf compost used as a top dressing over vegetation beds that provides a source of soil nutrients and helps retain soil moisture; in bioretention cells and dry swales the surface mulch layer provides pollutant removal and improves growing conditions for the selected plants; shredded hardwood bark has been found to work best as it is less likely to float.

refers to the characteristics and functions of a system prior to urban

:The natural ground material characteristic of or existing by virtue of geographic origin.

development.

Initial capturing and removal of unwanted contaminants, such as debris,

:Refers to a system that when full, stormwater will bypass the practice. Offline systems use flow splitters or bypass channels that only allow the water quality volume to enter the facility. This may be achieved with a pipe, weir, or curb opening sized for the target flow, but in conjunction, create a bypass channel so that higher flows do not pass over the surface of the filter bed.

sediment, leaves and pollutants, from stormwater before reaching a best management practice;

Examples include, settling forebays, vegetated filter strips and gravel diaphragms.

:The total mass of a pollutant entering a waterbody over a defined time period.

A lot level bioretention cell designed to receive and detain, infiltrate and filter runoff, typically used for discharge from downspouts.

Is the practice of intercepting, conveying and storing rainwater for future use. The captured rainwater is typically used for outdoor non-potable water uses such as irrigation and pressure washing, or in the building to flush toilets or urinals or other uses that do not require potable water.

:refers to the characteristics and functions of a system prior to urban development.

The infiltration and movement of surface water into the soil, past the vegetation root

:Initial capturing and removal of unwanted contaminants, such as debris, sediment, leaves and pollutants, from stormwater before reaching a best management practice; Examples include, settling forebays, vegetated filter strips and gravel diaphragms.

zone, to the zone of saturation or water table.

A vegetated ecosystem alongside a waterbody, characteristically have a high water

:A lot level bioretention cell designed to receive and detain, infiltrate and filter runoff, typically used for discharge from downspouts.

table and are subject to periodic flooding.

Water from rain, snow melt, or irrigation that flows over the land surface.

:Is the practice of intercepting, conveying and storing rainwater for future use. The captured rainwater is typically used for outdoor non-potable water uses such as irrigation and pressure washing, or in the building to flush toilets or urinals or other uses that do not require potable water.

:A vegetated ecosystem alongside a waterbody, characteristically have a high water table and are subject to periodic flooding.

Settling-out or deposition of particulate matter suspended in runoff.

:Water from rain, snow melt, or irrigation that flows over the land surface.

stone or other void forming material, that receives runoff and allow it to infiltrate into the native

soil; can also be referred to as infiltration galleries, French drains, dry wells or soakaway pits.

The practice of adding organic material, such as mulch or compost to topsoil

:Settling-out or deposition of particulate matter suspended in runoff.

to improve fertility, and tilling of the native soils to reverse compaction and restore its water

retaining capacity.

Water ponded on the ground surface.

:An excavated area lined with geotextile filter cloth and filled with clean granular stone or other void forming material, that receives runoff and allow it to infiltrate into the native soil; can also be referred to as infiltration galleries, French drains, dry wells or soakaway pits.

An underlying aggregate material bed that temporarily stores stormwater

:The practice of adding organic material, such as mulch or compost to topsoil to improve fertility, and tilling of the native soils to reverse compaction and restore its water retaining capacity.

before infiltrating into the native soil or being conveyed by an underdrain pipe.

:Water ponded on the ground surface.

treats stormwater through sedimentation and filtration only (i.e., no infiltration).

A natural waterway, formed by fluvial processes, that conveys running water.

:An underlying aggregate material bed that temporarily stores stormwater before infiltrating into the native soil or being conveyed by an underdrain pipe.

;Treatment Train Approach

;Treatment Train Approach