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;I/P ratio
;I/P ratio
:The ratio of the catchment (impervious area) to the footprint area of the receiving BMP (pervious area).
:The ratio of the impervious catchment (drainage) area to the pervious (footprint) area of the receiving BMP.
;LSRCA
;LSRCA
;Stone reservoir
;Stone reservoir
;stone reservoir
;stone reservoir
:An underlying aggregate material bed that temporarily stores stormwater before infiltrating into the native soil or being conveyed by an underdrain pipe.
;Storage reservoir
;storage reservoir
:An underlying bed filled with aggregate or other void-forming fill material that temporarily stores stormwater before infiltrating into the native soil or being conveyed by an underdrain pipe.
;Stormwater planter
;Stormwater planter
;TRCA
;TRCA
:Toronto Region Conservation Authority
:Toronto and Region Conservation Authority
;TSS
;TSS
;minor drainage system
;minor drainage system
;minor system
;minor system
;Minsor system
;Minor 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.
;Oil/grit separator
;Oil/grit separator
;oil and grit seperator
;oil and 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.
;Soakaway
;Soakaway
;soakaway
;soakaway
:A pit into which liquids may flow and then percolate slowly into the subsoil.
:An underground water storage reservoir into which stormwater is directed and allowed to percolate into the underlying native subsoil.
;Source control
;Source control
;Swales
;Swales
;swales
;swales
;Grass swale
;grass swale
;Grass swales
;grass swales
;Vegetated swale
;vegetated swale
;Vegetated swales
;vegetated swales
: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.