Changes

[[File:Bioretnetion TP.jpg|200px|thumb]]

[[File:Bioretnetion TP.jpg|200px|thumb]]

==Phosphorus Reduction==

==TSS Reduction==

The performance results for [[Bioretention]] practices, located within TRCA's watershed originate from three primary sites:  

The performance results for [[Bioretention]] practices, located within TRCA's watershed originate from three primary sites:  

*Kortright Centre

*Kortright Centre

*Earth Rangers

*Earth Rangers

*Seneca College

*Seneca College

*Central Parkway (Mississauga)

*Central Parkway (Mississauga)

*Wychwood Subdivision (Brampton)

*Wychwood Subdivision (Brampton)

*IMAX Corporation, head office

*IMAX Corporation, head office

The mean performance value recorded at the outlet for Bioretention practices' ability to remove Total [[Phosphorus]] (TP) was calculated based on 355 separate recordings between 2005-2007, 2011-2019 and 2021 amongst the seven sites previously mentioned.

The mean performance value recorded at the outlet for Bioretention practices' ability to remove Total Suspended Sediments (TSS) was was calculated based on 301 separate recordings between 2005-2007, 2011-2019 and 2021 amongst the six sites previously mentioned.

As can be seen in the corresponding boxplot the mean performance removal efficiency of the bioretention practices monitored are not meeting the acceptable upper extent range of nutrients as of 0.03 mg/L (30 µg/L) (Environment Canada, 2004<ref name="example1">Environment Canada. (2004). Canadian guidance framework for the management of phosphorus in freshwater systems. Ecosystem Health: Science‐based solutions report no. 1–8. Cat. No. En1–34/8–2004E. </ref>; OMOEE, 1994<ref>Ontario Ministry of Environment and Energy (OMOEE), 1994. Policies, Guidelines and Provincial Water Quality Objectives of the Ministry of Environment and Energy. Queen’s Printer for Ontario. Toronto, ON.</ref>).

As can be seen in the corresponding boxplot the mean performance removal efficiency of the bioretention practices monitored are well below the suggested guideline of 30 mg/L (Canadian Water Quality Guideline (CWQG), or

(background (assumed at <5 mg/L)+ 25 mg/L for short term (<24 hour) exposure) (CCME, 2002<ref>Canadian Council of Ministers of the Environment (CCME). 2002. Canadian water quality guidelines for the protection of aquatic life: Total particulate matter. In: Canadian Environmental Quality Guidelines, Canadian Council of Ministers of the Environment, Winnipeg</ref>; (TRCA, 2021<ref>TRCA. 2021. Spatial Patterns (2016-2020) and Temporal Trends (1966-2020) in Stream Water Quality across TRCA’s Jurisdiction Prepared by Watershed Planning and Ecosystem Science. https://trcaca.s3.ca-central-1.amazonaws.com/app/uploads/2021/10/29113334/2016-2020-SWQ-Report-v11_FINAL_AODA-FA.pdf</ref>).

The median value of the 355 samples taken was '''0.87 mg/L''' whereas the mean was '''0.123 mg/L''', with an '''86%''' guideline exceedance. Given the age of most of these practices, more inspection, maintenance and necessary rehabilitation will be needed to ensure they are able to meet the federal and provincial governments' guideline requirement for stormwater quality.

The median value of the 301 samples taken was '''9.50 mg/L''' whereas the mean was ''' 18.63 mg/L''', with a '''15%''' guideline exceedance.

==TSS Reduction==

==Phosphorus Reduction==

The performance results for [[Bioretention]] practices, located within TRCA's watershed originate from three primary sites:  

The performance results for [[Bioretention]] practices, located within TRCA's watershed originate from three primary sites:  

*Kortright Centre

*Kortright Centre

*Earth Rangers

*Earth Rangers

*Seneca College

*Seneca College

*Central Parkway (Mississauga)

*Central Parkway (Mississauga)

*Wychwood Subdivision (Brampton)

*Wychwood Subdivision (Brampton)

*IMAX Corporation, head office

*IMAX Corporation, head office

The mean performance value recorded at the outlet for Bioretention practices' ability to remove Total Suspended Sediments (TSS) was was calculated based on 301 separate recordings between 2005-2007, 2011-2019 and 2021 amongst the six sites previously mentioned.

The mean performance value recorded at the outlet for Bioretention practices' ability to remove Total [[Phosphorus]] (TP) was calculated based on 355 separate recordings between 2005-2007, 2011-2019 and 2021 amongst the seven sites previously mentioned.

 

 

The median value of the 355 samples taken was '''0.87 mg/L''' whereas the mean was '''0.123 mg/L''', with an '''86%''' guideline exceedance. Given the age of most of these practices, more inspection, maintenance and necessary rehabilitation will be needed to ensure they are able to meet the federal and provincial governments' guideline requirement for stormwater quality.

As can be seen in the corresponding boxplot the mean performance removal efficiency of the bioretention practices monitored are well below the suggested guideline of 30 mg/L (Canadian Water Quality Guideline (CWQG), or

'''Refer to the Phosphorus page and the additives page'''

(background (assumed at <5 mg/L)+ 25 mg/L for short term (<24 hour) exposure) (CCME, 2002<ref>Canadian Council of Ministers of the Environment (CCME). 2002. Canadian water quality guidelines for the protection of aquatic life: Total particulate matter. In: Canadian Environmental Quality Guidelines, Canadian Council of Ministers of the Environment, Winnipeg</ref>; (TRCA, 2021<ref>TRCA. 2021. Spatial Patterns (2016-2020) and Temporal Trends (1966-2020) in Stream Water Quality across TRCA’s Jurisdiction Prepared by Watershed Planning and Ecosystem Science. https://trcaca.s3.ca-central-1.amazonaws.com/app/uploads/2021/10/29113334/2016-2020-SWQ-Report-v11_FINAL_AODA-FA.pdf</ref>).

==Recent Performance Research==

==Recent Performance Research==