Changes

: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.

: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.

 

;BMP or Best Management Practices  

;Best Management Practices  

State of the art methods or techniques used to manage the quantity and improve the quality of wet weather flow. BMPs include Source, Conveyance and End-Of-Pipe Controls.  

State of the art methods or techniques used to manage the quantity and improve the quality of wet weather flow. BMPs include Source, Conveyance and End-Of-Pipe Controls.  

;conveyance

;conveyance

:Movement of water from one location to another.  

:Movement of water from one location to another.  

;Cultivar  

;Cultivar  

;cultivar

;cultivar

: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.

: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

;Green infrastructure

;green infrastructure

;green infrastructure

;Conveyance  

;Conveyance  

A structural BMP that is located within the drainage system where flows are concentrated and are being conveyed along corridor. Include but are not limited to pervious pipes, swales, and other similar systems.  

A structural BMP that is located within the drainage system where flows are concentrated and are being conveyed along corridor. Include but are not limited to pervious pipes, swales, and other similar systems.  

;Erosion  

;Erosion  

(1) The wearing away of the land surface by moving water, wind, ice or other geological agents, including such processes as gravitation creep; (2) Detachment and movement of soil or rock fragments by water, wind, ice or gravity (i.e. Accelerated, geological, gully, natural, rill, sheet, splash, or impact, etc).  

(1) The wearing away of the land surface by moving water, wind, ice or other geological agents, including such processes as gravitation creep; (2) Detachment and movement of soil or rock fragments by water, wind, ice or gravity (i.e. Accelerated, geological, gully, natural, rill, sheet, splash, or impact, etc).  

:Includes the protection of soil from dislocation by water, wind or other agents.  

:Includes the protection of soil from dislocation by water, wind or other agents.  

;Evapotranspiration (ET)

;Evapotranspiration  

:The quantity of water transpired (given off). Retained in plant tissues, and evaporated from plant tissues and surrounding soil surfaces. Quantitatively it is usually expressed in terms of depth of water per unit area during a specified period. e.g. mm/day

:The quantity of water transpired (given off). Retained in plant tissues, and evaporated from plant tissues and surrounding soil surfaces. Quantitatively it is usually expressed in terms of depth of water per unit area during a specified period. e.g. mm/day

;Floodplain (100-year)  

;Floodplain (100-year)  

:The area adjacent to a stream that is, on average, inundated once a century  

:The area adjacent to a stream that is, on average, inundated once a century  

;Geomorphology  

;Geomorphology  

:A branch of both physiography and geology that deals with the form of the earth, the general configuration of its surface, and the changes that take place due to erosion of the primary elements and the buildup of sediment.  

:A branch of both physiography and geology that deals with the form of the earth, the general configuration of its surface, and the changes that take place due to erosion of the primary elements and the buildup of sediment.  

;Infiltration

;Infiltration

;infitlration

;infiltration

:The slow movement of water into or through a soil or drainage system.  

:The slow movement of water into or through a soil or drainage system.  

;Infiltration rate  

;Infiltration rate  

:The rate at which stormwater percolates into the subsoil measured in inches per hour.  

:The rate at which stormwater percolates into the subsoil measured in inches per hour.  

;Irrigation

;Irrigation

'irrigation  

;irrigation  

:Human application of water to agricultural or recreational land for watering purposes. City of Toronto Wet Weather Flow Management November 2006 47  

:Human application of water to agricultural or recreational land for watering purposes. City of Toronto Wet Weather Flow Management November 2006 47  

   

   

:Low impact development is a stormwater management and land development strategy applied at the parcel and subdivision scale that emphasizes conservation and use of on-site natural features integrated with engineered, small scale hydrologic controls to more closely mimic pre-development hydrologic functions.  

:Low impact development is a stormwater management and land development strategy applied at the parcel and subdivision scale that emphasizes conservation and use of on-site natural features integrated with engineered, small scale hydrologic controls to more closely mimic pre-development hydrologic functions.  

;Major drainage system  

;Major drainage system

;major drainage system  

:That storm drainage system which carries the total runoff of the drainage system less the runoff carried by the minor system (storm sewer). The major system will function whether or not it has been planned and designed, and whether or not developments are situated wisely with respect to it. The Major Drainage System usually includes many features such as streets, gullies, and major drainage channels.  

:That storm drainage system which carries the total runoff of the drainage system less the runoff carried by the minor system (storm sewer). The major system will function whether or not it has been planned and designed, and whether or not developments are situated wisely with respect to it. The Major Drainage System usually includes many features such as streets, gullies, and major drainage channels.  

;Minor drainage system

;Minor drainage system

;minor drainage system  

;minor drainage system  

:That storm drainage system which is frequently used for collecting, transporting, and disposing of snowmelt, miscellaneous minor flows, and storm runoff up to the capacity of the system. The capacity should be equal to the maximum rate of runoff to be expected from the minor design storm which may have a frequency of occurrence of one in 2, or 5 years. The minor system may include many features ranging from curbs and gutters to storm sewer pipes and open drainage ways.  

:That storm drainage system which is frequently used for collecting, transporting, and disposing of snowmelt, miscellaneous minor flows, and storm runoff up to the capacity of the system. The capacity should be equal to the maximum rate of runoff to be expected from the minor design storm which may have a frequency of occurrence of one in 2, or 5 years. The minor system may include many features ranging from curbs and gutters to storm sewer pipes and open drainage ways.  

:Projects following the philosophy in which terrestrial and aquatic vegetation provides the ability to cleanse water of its contaminants.  

:Projects following the philosophy in which terrestrial and aquatic vegetation provides the ability to cleanse water of its contaminants.  

;Oil/Grit Separator

;Oil/grit separator

;OGS

;OGS

:Systems designed to remove trash, debris and some amount of sediment, oil and grease from stormwater runoff based on the principles of sedimentation for the grit and phase separation for the oil.  

:Systems designed to remove trash, debris and some amount of sediment, oil and grease from stormwater runoff based on the principles of sedimentation for the grit and phase separation for the oil.  

;Source control  

;Source control  

:A practice or structural measure that is usually implemented at the beginning of a drainage system or at the lot level, to reduce the volume of runoff and minimize the concentration of pollution in overland flow from private property and prevent pollutants from entering Stormwater runoff or other environmental media, as described by the Ministry of Environment.  

:A practice or structural measure that is usually implemented at the beginning of a drainage system or at the lot level, to reduce the volume of runoff and minimize the concentration of pollution in overland flow from private property and prevent pollutants from entering Stormwater runoff or other environmental media, as described by the Ministry of Environment.  

;Stakeholder  

;Stakeholder  

:Any person, agency or group who has a direct interest in the purpose of a proposed undertaking.  

:Any person, agency or group who has a direct interest in the purpose of a proposed undertaking.  

:A shallow constructed channel, often grass-lined, which is used as an alternative to curb and channel, or as a pretreatment to other measures. Swales are generally characterized by a broad top width to depth ratio and gentle grades.  

:A shallow constructed channel, often grass-lined, which is used as an alternative to curb and channel, or as a pretreatment to other measures. Swales are generally characterized by a broad top width to depth ratio and gentle grades.  

;Total Suspended Solids (TSS)

;Total Suspended Solids  

:The total amount of particulate matter that is suspended in the water column.  

:The total amount of particulate matter that is suspended in the water column.  

;Unit Response Function (URF)

;Unit Response Function  

:Represents the hydrologic response and water quality response of the area to a pre-determined series of meteorological inputs.  

:Represents the hydrologic response and water quality response of the area to a pre-determined series of meteorological inputs.  

;watershed plan

;watershed plan

:The result of a study undertaken within the drainage area of a specific river following the guidance presented in the MOE Stormwater Management Planning and Design Manual (i.e. Humber River Watershed).  

:The result of a study undertaken within the drainage area of a specific river following the guidance presented in the MOE Stormwater Management Planning and Design Manual (i.e. Humber River Watershed).  

Wetland  

 

A vegetated area such as a bog, fen, marsh, or swamp, where the soil or root zone is saturated for part of the year.  

;Wetland  

:A vegetated area such as a bog, fen, marsh, or swamp, where the soil or root zone is saturated for part of the year.  

;Wet weather flow

;Wet weather flow

;wet weather flow  

;wet weather flow  

:Stormwater runoff generated by either rainfall or snowmelt or flow resulting from sanitary wastewater that enters the combined sewer system; infiltration and inflows from foundation drains or other drains are resulting from rainfall or snowmelt.

:Stormwater runoff generated by either rainfall or snowmelt or flow resulting from sanitary wastewater that enters the combined sewer system; infiltration and inflows from foundation drains or other drains are resulting from rainfall or snowmelt.