1,647
edits
Changes
Jump to navigation
Jump to search
Line 112:
Line 112: + + + + Line 135:
Line 139: + + + + Line 152:
Line 160: − + − + − + − − ;Evapotranspiration − ;evapotranspiration − :The combined loss of water to the atmosphere from land and water surfaces by evaporation and from plants by transpiration. Line 168:
Line 172: + + + + + + + + Line 205:
Line 217: + + + + + + + + + + Line 286:
Line 308: + + + + + + Line 338:
Line 366: + + + + Line 378:
Line 410: − + − *<math>C</math> is the site runoff coefficient, − *<math>i</math> is the rainfall intensity, and; − *<math>A</math> is the drainage area) Line 389:
Line 418: + + + + Line 409:
Line 442: + + + + Line 693:
Line 730: + + + +
no edit summary
;Clean Out
;Clean Out
:Cleanouts are "a fitting access in a drainage system or venting system that is installed to provide access for cleaning and inspection and that is provided with a readily replaceable air tight cover" (O.Reg 332/12: Building Code, 2022).
:Cleanouts are "a fitting access in a drainage system or venting system that is installed to provide access for cleaning and inspection and that is provided with a readily replaceable air tight cover" (O.Reg 332/12: Building Code, 2022).
;Climate change scenario
;climate change scenario
:a plausible description of the future climate based on a model simulation using an assumed emissions scenario.
;Compost
;Compost
;depression storage
;depression storage
:A technique for incorporating shallow depressed areas into urban landscaped areas for storing and infiltrating runoff. Depression storage areas are small and have limited capacity and limited duration of retention in order to address property owner concerns relating to insects, damage to structures and inconvenience of ponded water on their property.
:A technique for incorporating shallow depressed areas into urban landscaped areas for storing and infiltrating runoff. Depression storage areas are small and have limited capacity and limited duration of retention in order to address property owner concerns relating to insects, damage to structures and inconvenience of ponded water on their property.
;Design storm
;design storm
:A rainfall pattern for use for the design of a hydraulic structure or system. A design storm is a specified amount of rainfall from a storm1 with its spatial and temporal distribution used to estimate a design discharge.
;Detention
;Detention
:Depressed storage area, designed to capture flood events.
:Depressed storage area, designed to capture flood events.
;Evaporation
;Emissions scenario
;evaporation
;emissions scenario
:Abiotic transfer of water vapour to the atmosphere.
:A description of how emissions of greenhouse gases and aerosols, or their precursors, and other external influences on the climate might evolve in the future. The Government of Canada usually presents three emissions scenarios (RCP8.5 = high global emission scenario, RCP4.5 = medium, RCP2.6 = low).
;Enhanced grass swale
;Enhanced grass swale
;Environmental Impact Report (EIR)
;Environmental Impact Report (EIR)
:The evaluation of the possible effects that may arise from a proposed project on the environment, together consisting of the natural, social and economic aspects.
:The evaluation of the possible effects that may arise from a proposed project on the environment, together consisting of the natural, social and economic aspects.
;Evaporation
;evaporation
:Abiotic transfer of water vapour to the atmosphere.
;Evapotranspiration
;evapotranspiration
:The combined loss of water to the atmosphere from land and water surfaces by evaporation and from plants by transpiration.
;Exfiltration
;Exfiltration
;fluvial geomorphology
;fluvial geomorphology
:The study of the processes responsible for the shape and form, or morphology, of watercourses; describes the processes whereby sediment (e.g., silt, sand, gravel) and water are transported from the headwaters of a watershed to its mouth.
:The study of the processes responsible for the shape and form, or morphology, of watercourses; describes the processes whereby sediment (e.g., silt, sand, gravel) and water are transported from the headwaters of a watershed to its mouth.
;Freshet
;freshet
:Annual spring increase in water levels caused by melting snow, ice, and increased rainfall.
;Fused grid
;Fused grid
;fused grid
;fused grid
: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.
;General Use Designation
;General Use Level Designation
;GULD
:The General Use Level Designation (GULD) is provided by the Washington Department of Technology to all technologies that meet the performance goals set out in the TAPE protocol. Performance requirements include 80% TSS removal for influent concentrations from 100-200 mg/L and effluent concentrations <20 mg/L for influent concentrations from 20 to 100 mg/L. See Table 2 in the TAPE protocol for more information.
;Geotextile
;Geotextile
;invasive plants
;invasive plants
:Typically non-native plants that out-compete native species. These species lack natural predators, grow aggressively and reproduce rapidly and can be problematic in the natural environment.
:Typically non-native plants that out-compete native species. These species lack natural predators, grow aggressively and reproduce rapidly and can be problematic in the natural environment.
;Irreducible concentration
;irreducible concentration
;Irreducible level
;irreducible level
:The pollutant concentration below which further reduction can not be reliably achieved by the treatment technology in question (Schueler, 2000)<ref>Schueler, T. 2000. Irreducible Pollutant Concentration Discharged from Stormwater Practices. Technical Note #75, In Watershed Protection Techniques. 2(2), 369-372, Centre for Watershed Protection.</ref>
;I/P ratio
;I/P ratio
;offline
;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.
: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.
;Peak flow
;peak flow
:the maximum flow rate occurring during a flood event measured at a given point in a river, street, or pipe system.
;Permeable pavement
;Permeable pavement
;Rational method
;Rational method
;rational method
;rational method
:<math>Q = CiA</math>:
:This formula is used to calculate peak rates of runoff when designing drainage LID BMPs in urban area. It is useful in estimating runoff on relatively small areas (roofs, parking lots, medians, road right-of-ways, etc.)
;RWH
;RWH
;recharge
;recharge
:The infiltration and movement of surface water into the soil, past the vegetation root zone, to the zone of saturation or water table.
:The infiltration and movement of surface water into the soil, past the vegetation root zone, to the zone of saturation or water table.
;Return period
;return period
:The average time between years when an precipitation event of specified magnitude is met or exceeded.
;Riparian
;Riparian
;soil amendment
;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.
: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.
;Sorption
;sorption
:The process where one substance adheres to or is taken up by another.
;Standing water
;Standing water
;public property
;public property
:Land owned by the City Toronto or any other level of government or public agency (such as Toronto and Region Conservation Authority, Toronto Transit Commission, school boards).
:Land owned by the City Toronto or any other level of government or public agency (such as Toronto and Region Conservation Authority, Toronto Transit Commission, school boards).
;Pyrolysis
;pyrolysis
:The heating of an organic material in the absence of oxygen.
;Rainfall Intensity
;Rainfall Intensity