8,254
edits
Changes
Jump to navigation
Jump to search
Line 18:
Line 18:
= D =<ul><li>Depression Storage: A technique for incorporating shallow depressed areas into urban landscaped areas for storing and infiltrating runoff. Typically, 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.</li><li>Detention: The temporary storage of stormwater to control discharge rates, and allow for sedimentation.</li><li>Drawdown time: The period between the maximum water level and the minimum level (dry weather or antecedent level).</li><li>Dry swale: 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 theunderlying native soil.</li></ul>= E=<ul><li>Evapotranspiration; The combined loss of water to the atmosphere from land and water surfaces by evaporation and from plants by transpiration.</li><li>Enhanced grass swale: Vegetated open channels designed to convey, treat and attenuate stormwater runoff, also referred to as enhanced vegetated swales. Enhanced grass swales are not capable of providing the same water balance and water quality benefits as dry swales, as they lack the engineered soil media and storage capacity.</li><li>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.</li><li>Exfiltration: Loss of water from a drainage system as a result of percolation or absorption into the surrounding medium (e.g., the infiltration of water into the native soil through a perforated pipe wall as it is conveyed).</li></ul>= F =<ul><li>Filter media: The engineered soil bed component of bioretention cell or dry swale designs, typically composed of a sandy soil mixture containing a limited proportion of fine textured material, which provides a growing medium for vegetation, maintains a high rate of infiltration over the lifespan of the practice, and retains contaminants through filtration and adsorption to soil particles.</li><li>Filtration: The technique of removing pollutants from runoff as it infiltrates through the soil.</li><li>Fines: Soil materials with less than a 0.050 mm diameter particle size.</li><li>First flush: Initial pulse of stormwater runoff which picks up the pollutants that have settled on surfaces during the dry period. The first flush contains the highest pollutant concentrations.</li><li>Forebay: A pretreatment basin at the inlet of a practice that allow settling out of sediment and associated contaminants suspended in urban runoff.</li><li>Flow path length: The minimum linear distance of water flow across a surface.</li><li>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.</li><li>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.</li></ul>
no edit summary
;Compost
;Compost
:Dead leaves and stuff.
;Depression Storage
:A technique for incorporating shallow depressed areas into urban landscaped areas for storing and infiltrating runoff. Typically, 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.
;Detention
:The temporary storage of stormwater to control discharge rates, and allow for sedimentation.
;Drawdown time
:The period between the maximum water level and the minimum level (dry weather or antecedent level).
;Dry swale
;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
underlying native soil.
;Evapotranspiration
:The combined loss of water to the atmosphere from land and water surfaces by evaporation and from plants by transpiration.
;Enhanced grass swale
:Vegetated open channels, with check dams; designed to convey, treat and attenuate stormwater runoff, also referred to as enhanced vegetated swales.
;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.
;Exfiltration
:Loss of water from a drainage system as a result of percolation or absorption into the surrounding medium (e.g., the infiltration of water into the native soil through a perforated pipe wall as it is conveyed).
;Filter media
:The engineered soil bed component of bioretention cell or dry swale designs, typically composed of a sandy soil mixture containing a limited proportion of fine textured material, which provides a growing medium for vegetation, maintains a high rate of infiltration over the lifespan of the practice, and retains contaminants through filtration and adsorption to soil particles.
;Filtration
:The technique of removing pollutants from runoff as it infiltrates through the soil.
;Fines
:Soil materials with less than a 0.050 mm diameter particle size.
;First flush: Initial pulse of stormwater runoff which picks up the pollutants that have settled on surfaces during the dry period. The first flush contains the highest pollutant concentrations.
;Forebay
:A pretreatment basin at the inlet of a practice that allow settling out of sediment and associated contaminants suspended in urban runoff.
;Flow path length
:The minimum linear distance of water flow across a surface.
;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.
;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.
= G =
= G =
<ul>
<ul>