Phosphorus

Reducing discharged phosphorus

In many forms of LID practice, the dominant mechanism reducing the loading of phosphorus, is the significant volume reduction achieved.

• Bioretention: Performance
• Others...

For infiltration practices an 'amendment' can help to retain even further P. Amendments

Phosphorous testing

To help ensure LID BMPs sustain healthy vegetation cover while not contributing substantially to nutrient loading of receiving waters, the quantity of extractable (i.e., available) P in the soil component needs to be measured and compared to design specifications or acceptance criteria. Phosphorus testing

Low Impact Development. A stormwater management strategy that seeks to mitigate the impacts of increased urban runoff and stormwater pollution by managing it as close to its source as possible. It comprises a set of site design approaches and small scale stormwater management practices that promote the use of natural systems for infiltration and evapotranspiration, and rainwater harvesting.

The total mass of a pollutant entering a waterbody over a defined time period.

The net amount of something (e.g. chemical, such as phosphorus), calculated as the product of concentration and volume in a given time. Some BMPs significantly reduce loading of pollutants to the environment by reducing volume more so than concentration.

Watercourses and Lake Ontario, to which Stormwater and Combined Sewer Overflows discharge.