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==Event mean concentrations for dissolved phosphorus==
 
==Event mean concentrations for dissolved phosphorus==
The following table summarizes results from our literature review. The table includes a range of values observed in the literature. Note this range does not represent a statistically-derived range but instead is based on a combination of data analysis and best professional judgement. For example, we did analyze the data for outliers, but also omitted entire studies if we felt the data were not representative of conditions likely to be encountered in Minnesota. To see the full range of values compiled from the literature, open the Excel spreadsheet containing the data.
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The following table summarizes results from our literature review. There are insufficient data to support recommended event mean concentrations (emcs) for different land uses. The table provides a summary of data we felt is appropriate for selecting an emc for dissolved phosphorus. To see the full range of values compiled from the literature, open the Excel spreadsheet containing the data.
  
 
{{:Event mean concentrations for dissolved phosphorus}}
 
{{:Event mean concentrations for dissolved phosphorus}}

Revision as of 20:59, 9 November 2019

Caution: This is a test page for the Minnesota Stormwater Manual

This page provides information on event mean concentrations of total phosphorus and dissolved phosphorus in urban stormwater runoff. For a discussion of phosphorus in stormwater runoff, including information on sources, fate, and water quality impacts, see Phosphorus.

Objective

Event mean concentration (EMCs) are used in several models for predicting water quality impacts from stormwater runoff and stormwater treatment practices. This page provides summary information that can be used for selecting appropriate EMCs. For a discussion of event mean concentrations, see Stormwater pollutant concentrations and event mean concentrations.

Information: Many factors affect phosphorus concentrations in stormwater. If you are unfamiliar with the concept of event mean concentrations, We recommend you first read Stormwater pollutant concentrations and event mean concentrations

Methodology

We conducted a review of literature to develop the EMCs shown on this page. Nearly all studies provided summary information; we therefore did not analyze raw data with the exception of data from Capitol Region Watershed District (see discussion below). We compiled the summary information into a spreadsheet and conducted simple statistical analysis of the information.

Data from the following studies were used to generate emcs for total phosphorus.

Event mean concentrations for total phosphorus

The following table summarizes results from our literature review. The table includes a range of values observed in the literature. Note this range does not represent a statistically-derived range but instead is based on a combination of data analysis and best professional judgement. For example, we did analyze the data for outliers, but also omitted entire studies if we felt the data were not representative of conditions likely to be encountered in Minnesota. To see the full range of values compiled from the literature, open the Excel spreadsheet containing the data.


Event mean concentrations for total phosphorus. This table was updated October 31, 2019. We retained data from the previous table, but we recommend using the median values from a literature review (3rd column). To see supporting information used to derive this table, link here.
Link to this table

Land cover/land use Range (mg/L) Median from literature review (mg/L)1 Mean from literature review (mg/L)1 Previous tabled value (mg/L)1
Commercial2, 3 0.20 - 0.34 0.20 0.34 0.22
Industrial2, 3 0.23 - 0.55 0.31 0.73 0.26
Residential3 0.26 - 0.38 0.36 0.38 0.30
High-density/Multi-family residential2, 3 0.28 - 0.40 0.28 0.28 0.27 to 0.32
Medium density residential 0.18 - 0.40 0.18 0.51
Low density residential 0.24 - 0.40 0.24 0.29
Freeways/transportation3 0.25 - 0.45 0.35 0.53 0.25
Mixed 0.25 - 0.45 0.29 0.89
Parks and recreation2 0.04
Open space2, 3 0.12 - 0.31 0.13 0.41 0.31
Conventional roof 0.05 - 0.20 0.09 0.27
Public/semi public (institutional)2, 3 0.18 - 0.40 0.26 0.42 0.18
Cropland2 0.32
Forest/shrub/grassland12 0.04
Open water2 0.01
Wetlands2 0.01 to 0.044
Farmsteads2 0.46
Forest 0.05 - 0.25 0.25 0.14

1We recommend using the median from literature reviews and not the means or previous values.
2 Minnehaha Creek Watershed district, 2003
3 Robert Pitt et al., 2004
4 Average for large wetlands and wetland complexes. Individual wetlands should be monitored to determine source/sink behavior.


Event mean concentrations for dissolved phosphorus

The following table summarizes results from our literature review. There are insufficient data to support recommended event mean concentrations (emcs) for different land uses. The table provides a summary of data we felt is appropriate for selecting an emc for dissolved phosphorus. To see the full range of values compiled from the literature, open the Excel spreadsheet containing the data.


Summary of dissolved phosphorus event mean concentrations from various studies. There is inadequate information to provide recommended emcs for different land uses.
Link to this table

Study Land cover/land use Range (mg/L) Mean Median Number of samples
Dallas-Fort Worth1 Commercial 0.01-0.47 0.09 0.06 42
Dallas-Fort Worth Industrial 0.03-0.45 0.14 0.09 63
Dallas-Fort Worth Residential 0.04-0.84 0.25 0.21 77
Forth Worth2 Transportation 0.11 28
Twin Cities3 Mixed 0.01-1.4 0.2 0.15 147
Madison4 Medium density residential 0.52 0.61 25
Madison4 Medium density residential 0.4 0.14 25
Madison4 Medium density residential 0.14 0.04 25
Madison4 Medium density residential 0.05 0.03 25
Madison4 Medium density residential 0.04 0.02 25
Madison4 Medium density residential 0.03 0.02 25
Madison4 Medium density residential 0.04 0.02 25
Madison4 Medium density residential 1.54 0.81 25
Madison4 Medium density residential 0.12 0.08 25
Madison4 Medium density residential 0.11 0.07 25
Madison4 Medium density residential 0.11 0.07 25
US EPA Nurp Study5 Residential 0.143
US EPA Nurp Study5 Mixed 0.056
US EPA Nurp Study5 Commercial 0.08
US EPA Nurp Study5 Open 0.026
New York6 Residential 0.20 738
New York6 Commercial 0.18 323
New York6 Industrial 0.16 325
New York6 Open 0.16 44

1Urban Stormwater Quality, Event-Mean Concentrations, and Estimates of Stormwater Pollutant Loads, Dallas-Fort Worth Area, Texas. 1992–93 Stanley Baldys III, T.H. Raines, B.L. Mansfield, and J.T. Sandlin U.S. Geological Survey Water-Resources Investigations Report 98–4158.
2Computed and Estimated Pollutant Loads, West Fork Trinity River, Fort Worth, Texas, 1997. United States Geological survey. Water Resources Investigations Report 01–4253
3Brezonik and stadelman. 2002. Analysis and predictive models of stormwater runoff volumes, loads, and pollutant concentrations from watersheds in the Twin Cities metropolitan area, Minnesota, USA. Water Research Volume 36, Issue 7, Pages 1743-1757
457.Waschbusch, R.J., W.R. Selbig, and R.T. Bannerman. 1999. Sources of phosphorus and street dirt from Two Urban Residential Basins in Madison, Wisconsin, 1994-95. USGS Water-Resources Investigation Report 99-4021
5U.S. EPA. Results of the Nationwide Urban Runoff Program. 1983. Volume I: Final Report. PB84-185552
6New York State Department of Environmental Conservation. August 2003. Stormwater Management Design Manual. Chapter 5 - Acceptable Stormwater Management Practices.

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