Changes

The total phosphorus concentrations in stormwater runoff depend on the type of land use and range in 0.16-0.46 mg/L (Maestre and Pitt 2005<ref name="example1" />). Stormwater features should reduce these nutrient concentrations before reaching receiving streams and lakes. Environment Canada (2004<ref name="example2">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>) indicates a range of 0.001-2 mg/L (1-200 µg/L) for concentration of total phosphorus in natural waters, while the same range for uncontaminated freshwaters is within 0.01-0.05 mg/L (10-50 µg/L). Within lakes and rivers, trigger concentration ranges are identified and used internationally to explain trophic status of these waters. Based on these triggers, Environment Canada has identified the acceptable range of nutrients as 0.01-0.035 mg/L (10-35 µg/L). Given the flow of water within streams and capacity to flush out pollutants, rivers can maintain higher phosphorus loads than lakes without alterations of community composition and biomass (Environment Canada, 2004<ref name="example2" />). Stormwater features often drain into streams and therefore a similar outflow concentration ranges for total phosphorus is expected from those.  

The total phosphorus concentrations in stormwater runoff depend on the type of land use and range in 0.16-0.46 mg/L (Maestre and Pitt 2005<ref name="example1" />). Stormwater features should reduce these nutrient concentrations before reaching receiving streams and lakes. Environment Canada (2004<ref name="example2">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>) indicates a range of 0.001-2 mg/L (1-200 µg/L) for concentration of total phosphorus in natural waters, while the same range for uncontaminated freshwaters is within 0.01-0.05 mg/L (10-50 µg/L). Within lakes and rivers, trigger concentration ranges are identified and used internationally to explain trophic status of these waters. Based on these triggers, Environment Canada has identified the acceptable range of nutrients as 0.01-0.035 mg/L (10-35 µg/L). Given the flow of water within streams and capacity to flush out pollutants, rivers can maintain higher phosphorus loads than lakes without alterations of community composition and biomass (Environment Canada, 2004<ref name="example2" />). Stormwater features often drain into streams and therefore a similar outflow concentration ranges for total phosphorus is expected from those.  

==Test methods to estimate the phosphorus concentrations in water and soil==

==Test methods to estimate phosphorus levels in water & soil==

Phosphorus concentrations mentioned above relate to the phosphorus content in water. Depending on the LID type, phosphorus exists in the soil/media as well. Such LIDs include, [[bioretention]], [[enhanced swales|enhanced grass swales]], [[vegetated filter strips]], [[absorbent landscapes]], and [[green roofs]]. The methods used for phosphorus concentration estimation in both water and soil are summarized below.

Phosphorus concentrations mentioned above relate to the phosphorus content in water. Depending on the LID type, phosphorus exists in the soil/media as well. Such LIDs include, [[bioretention]], [[enhanced swales|enhanced grass swales]], [[vegetated filter strips]], [[absorbent landscapes]], and [[green roofs]]. The methods used for phosphorus concentration estimation in both water and soil are summarized below.