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Line 68: + + + + − = G =+ − <ul>+ − <li>Grass swales: Vegetated, open channels designed to convey, treat and attenuate runoff. Design variations range from simple grass channels, which are designed primarily for conveyance to more complex treatment and volume reduction designs like enhanced grass swales, and dry swales or bioswales.</li> − <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> − <li>Gravel diaphragm: Is 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.</li> − <li>Green roof: 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.</li> − <li>Green infrastructure: Natural vegetation and vegetative technologies in urban settings such as: urban forests; green roofs; green walls; green spaces; rain gardens; bioswales; community gardens; natural and engineered wetlands and stormwater management ponds; and porous pavement systems. These systems are designed to provide multiple benefits, such as moderate temperatures, clean air and water, and improve aesthetics.</li> − <li>Groundwater discharge: The outflow of groundwater to a well, spring, wetland or watercourse.</li> − <li>Groundwater recharge: The inflow of surface water to a groundwater reservoir or aquifer.</li> − </ul> − = H = − === Hydraulic Conductivity === − A parameter that describes the capability of a medium to transmit water. − === Hydrologic Cycle ===+ − The circulation of water from the atmosphere to the earth and back, through+ − precipitation, runoff, infiltration, groundwater flow and evapotranspiration. − === Hydrologic Regime ===+ − The characteristic pattern of precipitation, runoff, infiltration and evaporation+ − affecting the hydrology of a system. − === Hydrologic Soil Groups ===+ − + − + + + + + + + + + + + + + + + + + + Line 109:
Line 115: + + − = I =+ − === Impervious ===+ − A hard surface area (e.g., road, parking area or rooftop) that prevents or retards − the infiltration of water into the soil. − − === Infiltration === − − − === Inline === − Refers to a system that accepts all of the flow from a drainage area and conveys larger − event flows through an overflow outlet. − − − = J = − − = K =+ + + + − = L =+ − <ul>+ − <li>Landform: The natural features of the landscape, dictates flow patterns, runoff velocities and discharge rates.</li> − <li>Landscape-based approach: − − − − === Lot Level ===+ − + − − − === Low Impact Development ===+ − + − + − − − = M =+ − === Master Environmental Servicing Plan (MESP) ===+ − + − − − === Mulch === − 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. − − − = N = − === Native Soil === − The natural ground material characteristic of or existing by virtue of geographic − origin. − − − = O = − === Offline === − 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. − − − = P = − === Permeable Pavement === − Is an 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. − − === Physiography === − The physical features of the land, including topography, morphology and − geologic origin. The physical feature of the land has an influence on the surface water − movement and the interactions between surface water and groundwater. − − === Pollution Hot Spot === − areas where certain land uses or activities have the potential to generate − highly contaminated runoff (e.g., vehicle fuelling, service or demolition areas, outdoor storage − and handling areas for hazardous materials and some heavy industry sites). − === Pollutant Load ===+ − The total mass of a pollutant entering a waterbody over a defined time period.+ − === Predevelopment ===+ − refers to the characteristics and functions of a system prior to urban+ − development. − === Pretreatment ===+ − 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. + + + − = Q =+ + + + − = R =+ − === Rain garden ===+ − A lot level bioretention cell designed to receive and detain, infiltrate and filter runoff, typically used for discharge from downspouts. − ===Rainwater harvesting===+ − 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.+ − === Recharge ===+ − The infiltration and movement of surface water into the soil, past the vegetation root+ − zone, to the zone of saturation or water table. − === Riparian ===+ − + − table and are subject to periodic flooding. − === Runoff ===+ − Water from rain, snow melt, or irrigation that flows over the land surface.+ + + − = S =+ − === Sedimentation ===+ − Settling-out or deposition of particulate matter suspended in runoff. − === Soakaway ===+ − 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. − === Soil Amendment ===+ − 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. − === Standing Water ===+ − Water ponded on the ground surface.+ − === Stone Reservoir ===+ − An underlying aggregate material bed that temporarily stores stormwater+ − before infiltrating into the native soil or being conveyed by an underdrain pipe. − === Stormwater Planer ===+ − A bioretention cell that features an imperveable liner that collects and+ − treats stormwater through sedimentation and filtration only (i.e., no infiltration). − === Stream Channel ===+ − A natural waterway, formed by fluvial processes, that conveys running water.+ + + + +
no edit summary
;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.
;Grass swales
:Vegetated, open channels designed to convey, treat and attenuate runoff. Design variations range from simple grass channels, which are designed primarily for conveyance to more complex treatment and volume reduction designs like enhanced grass swales, and dry swales or bioswales.
;Geotextile
: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.
;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.
;Gravel diaphragm
: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.
;Green roof
: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.
;Green infrastructure
A soil classification system based on the ability to convey and store
:Natural vegetation and vegetative technologies in urban settings such as: urban forests; green roofs; green walls; green spaces; rain gardens; bioswales; community gardens; natural and engineered wetlands and stormwater management ponds; and porous pavement systems. These systems are designed to provide multiple benefits, such as moderate temperatures, clean air and water, and improve aesthetics.
water; divided into four groups:
;Groundwater discharge
:The outflow of groundwater to a well, spring, wetland or watercourse.
;Groundwater recharge
:The inflow of surface water to a groundwater reservoir or aquifer.
;Hydraulic conductivity
:A parameter that describes the capability of a medium to transmit water.
;Hydrologic cycle
:The circulation of water from the atmosphere to the earth and back, through precipitation, runoff, infiltration, groundwater flow and evapotranspiration.
;Hydrologic regime
:The characteristic pattern of precipitation, runoff, infiltration and evaporation 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:
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.
;Impervious
:A hard surface area (e.g., road, parking area or rooftop) that prevents or retards the infiltration of water into the soil.
;Infiltration
:Penetration of water through the ground surface.
Penetration of water through the ground surface.
;Inline
:Refers to a system that accepts all of the flow from a drainage area and conveys larger event flows through an overflow outlet.
;Landform
:The natural features of the landscape, dictates flow patterns, runoff velocities and discharge rates.
;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.
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
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
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
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.
;Mulch
: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.
;Native soil
:The natural ground material characteristic of or existing by virtue of geographic origin.
;Offline
: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.
;Permeable pavement
:An 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.
;Physiography
:The physical features of the land, including topography, morphology and geologic origin. The physical feature of the land has an influence on the surface water movement and the interactions between surface water and groundwater.
;Pollution hot spot
:Areas where certain land uses or activities have the potential to generate highly contaminated runoff (e.g., vehicle fuelling, service or demolition areas, outdoor storage and handling areas for hazardous materials and some heavy industry sites).
;Pollutant load
:The total mass of a pollutant entering a waterbody over a defined time period.
;Predevelopment
:refers to the characteristics and functions of a system prior to urban development.
;Pretreatment
: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.
;Rain garden
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.
;Rainwater harvesting
: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.
;Recharge
:The infiltration and movement of surface water into the soil, past the vegetation root zone, to the zone of saturation or water table.
;Riparian
:A vegetated ecosystem alongside a waterbody, characteristically have a high water table and are subject to periodic flooding.
;Runoff
:Water from rain, snow melt, or irrigation that flows over the land surface.
;Sedimentation
:Settling-out or deposition of particulate matter suspended in runoff.
;Soakaway
: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.
;Soil amendment
: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.
;Standing water
:Water ponded on the ground surface.
;Stone reservoir
:An underlying aggregate material bed that temporarily stores stormwater before infiltrating into the native soil or being conveyed by an underdrain pipe.
;Stormwater planter
:A bioretention cell that features an impermeable liner that collects and treats stormwater through sedimentation and filtration only (i.e., no infiltration).
;Stream channel
:A natural waterway, formed by fluvial processes, that conveys running water.
;Treatment Train Approach
;Treatment Train Approach