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Difference between revisions of "Event mean concentrations for total phosphorus"

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<noinclude>
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<font size=3>'''Event mean concentrations for total phosphorus.</font size><br>
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{{alert|This page was updated October 31, 2019. Read table caption below.|alert-info}}
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Link to this [[Event mean concentrations for total phosphorus|table]]
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</noinclude>
 
  
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<font size=3>'''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, [https://stormwater.pca.state.mn.us/index.php?title=Stormwater_pollutant_concentrations_and_event_mean_concentrations link here].'''</font size><br>
 
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Link to this [[Event mean concentrations for total phosphorus|table]]
 
 
<table class="sortable">
 
<table class="sortable">
 
<tr>
 
<tr>
 
<th>Land cover/land use</th>
 
<th>Land cover/land use</th>
 
<th>Range (mg/L)</th>
 
<th>Range (mg/L)</th>
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<th>Median from literature review (mg/L)<sup>1</sup></th>
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<th>Recommended value (mg/L)</th>
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<th>Recommended value (mg/L)<sup>1</sup></th>
 
 
<th>Notes</th>
 
<th>Notes</th>
 
</tr>
 
</tr>
 
<tr>
 
<tr>
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<td>Commercial<sup>2, 3</sup></td>
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<td>Commercial</td>
 
<td>0.20 - 0.34</td>
 
<td>0.20 - 0.34</td>
−
<td>0.17</td>
+
<td>0.200</td>
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<td>0.20</td>
 
 
<td>If applicable to models being used, adjust curve numbers/runoff coefficients when calculating loads</td>
 
<td>If applicable to models being used, adjust curve numbers/runoff coefficients when calculating loads</td>
 
</tr>
 
</tr>
 
<tr>
 
<tr>
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<td>Industrial<sup>2, 3</sup></td>
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<td>Industrial</td>
 
<td>0.23 - 0.55</td>
 
<td>0.23 - 0.55</td>
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<td>0.235</td>
 
 
<td>0.235</td>
 
<td>0.235</td>
 
<td>
 
<td>
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</tr>
 
</tr>
 
<tr>
 
<tr>
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<td>Residential<sup>3</sup></td>
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<td>Residential</td>
 
<td>0.26 - 0.38</td>
 
<td>0.26 - 0.38</td>
−
<td>0.36</td>
 
 
<td>0.325</td>
 
<td>0.325</td>
 
<td>Concentrations vary widely depending on local conditions</td>
 
<td>Concentrations vary widely depending on local conditions</td>
 
</tr>
 
</tr>
 
<tr>
 
<tr>
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<td>High-density/Multi-family residential<sup>2, 3</sup></td>
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<td>[https://stormwater.pca.state.mn.us/index.php?title=Event_mean_concentrations_of_total_and_dissolved_phosphorus_in_stormwater_runoff#Residential_land_use High-density/Multi-family residential]</td>
 
<td>0.28 - 0.40</td>
 
<td>0.28 - 0.40</td>
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<td>0.28</td>
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<td>[https://stormwater.pca.state.mn.us/index.php?title=Event_mean_concentrations_of_total_and_dissolved_phosphorus_in_stormwater_runoff#Mixed_land_use_emcs Calculate]<sup>1</sup></td>
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<td>Calculate</td>
 
 
<td>
 
<td>
 
*Insufficient information to recommend a specific emc
 
*Insufficient information to recommend a specific emc
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</tr>
 
</tr>
 
<tr>
 
<tr>
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<td>Medium density residential</td>
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<td>[https://stormwater.pca.state.mn.us/index.php?title=Event_mean_concentrations_of_total_and_dissolved_phosphorus_in_stormwater_runoff#Residential_land_use Medium density residential]</td>
 
<td>0.18 - 0.40</td>
 
<td>0.18 - 0.40</td>
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<td>0.18</td>
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<td>[https://stormwater.pca.state.mn.us/index.php?title=Event_mean_concentrations_of_total_and_dissolved_phosphorus_in_stormwater_runoff#Mixed_land_use_emcs Calculate]<sup>1</sup></td>
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<td>Calculate</td>
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<td>
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<td>*Insufficient information to recommend a specific emc
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*Insufficient information to recommend a specific emc
 
*Concentrations vary widely depending on local conditions</td>
 
*Concentrations vary widely depending on local conditions</td>
 
</tr>
 
</tr>
 
<tr>
 
<tr>
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<td>Low density residential</td>
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<td>[https://stormwater.pca.state.mn.us/index.php?title=Event_mean_concentrations_of_total_and_dissolved_phosphorus_in_stormwater_runoff#Residential_land_use Low density residential]</td>
 
<td>0.24 - 0.40</td>
 
<td>0.24 - 0.40</td>
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<td>0.24</td>
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<td>[https://stormwater.pca.state.mn.us/index.php?title=Event_mean_concentrations_of_total_and_dissolved_phosphorus_in_stormwater_runoff#Mixed_land_use_emcs Calculate]<sup>1</sup></td>
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<td>Calculate</td>
 
 
<td>
 
<td>
 
*Insufficient information to recommend a specific emc
 
*Insufficient information to recommend a specific emc
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</tr>
 
</tr>
 
<tr>
 
<tr>
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<td>Freeways/transportation<sup>3</sup></td>
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<td>Freeways/transportation</td>
 
<td>0.25 - 0.45</td>
 
<td>0.25 - 0.45</td>
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<td>0.35</td>
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<td>0.280</td>
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<td></td>
 
 
<td>
 
<td>
−
*Concentrations vary  
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*Concentrations vary widely depending on inputs
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0.25</td>
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*Adjust upward for areas receiving large inputs of road salt or sediment or having very heavy traffic loads
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*Adjust downward for low traffic areas or areas with reduced inputs (e.g. little road salt application, limited truck traffic)
 +
</td>
 
</tr>
 
</tr>
 
<tr>
 
<tr>
 
<td>Mixed</td>
 
<td>Mixed</td>
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<td>0.25 - 0.45</td>
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<td>0.16 - 0.84</td>
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<td>0.29</td>
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<td>0.290</td>
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<td></td>
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<td>
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<td></td>
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*Residential land use was the primary land use in most studies that cited values for mixed land use
 +
*If the study area can be delineated into specific land uses and impervious area for each land use is know, [https://stormwater.pca.state.mn.us/index.php?title=Event_mean_concentrations_of_total_and_dissolved_phosphorus_in_stormwater_runoff#Mixed_land_use_emcs we recommend calculating the emc]
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</td>
 
</tr>
 
</tr>
 
<tr>
 
<tr>
−
<td>Parks and recreation<sup>2</sup></td>
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<td>Parks and recreation</td>
−
<td></td>
 
−
<td></td>
 
−
<td></td>
 
 
<td></td>
 
<td></td>
 +
<td>Use value for open space or calculate</td>
 +
<td>
 +
*emc will be a function of vegetative cover
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*Adjust upward if street tree canopy cover is high or pervious areas are primarily grass on compacted soils
 +
</td>
 
</tr>
 
</tr>
 
<tr>
 
<tr>
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<td>Open space<sup>2, 3</sup></td>
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<td>Open space</td>
 
<td>0.12 - 0.31</td>
 
<td>0.12 - 0.31</td>
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<td>0.13</td>
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<td>0.190</td>
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<td></td>
 
 
<td></td>
 
<td></td>
 
</tr>
 
</tr>
 
<tr>
 
<tr>
 
<td>Conventional roof</td>
 
<td>Conventional roof</td>
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<td>0.05 - 0.20</td>
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<td>0.01 - 0.20</td>
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<td>0.09</td>
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<td>0.030</td>
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<td></td>
 
 
<td></td>
 
<td></td>
 
</tr>
 
</tr>
 
<tr>
 
<tr>
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<td>Public/semi public (institutional)<sup>2, 3</sup></td>
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<td>Institutional</td>
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<td>0.18 - 0.40</td>
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<td>0.14 - 0.422</td>
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<td>0.26</td>
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<td>See note</td>
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<td></td>
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<td>
−
<td></td>
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*Use low values in range (0.200 mg/L or less) for facilities such as campuses, where there is considerable pervious area
 +
*Use high values in range (0.30 mg/L or greater) for areas with considerable impervious surface, such as sports facilities or facilities with large parking areas
 +
</td>
 
</tr>
 
</tr>
 
<tr>
 
<tr>
−
<td>Cropland<sup>2</sup></td>
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<td>Forest/shrub/grassland</td>
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<td></td>
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<td>0.03 - 0.45</td>
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<td></td>
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<td>0.090</td>
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<td></td>
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<td>Concentrations are likely to vary with season in areas with fall leaf drop</td>
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<td></td>
 
 
</tr>
 
</tr>
 
<tr>
 
<tr>
−
<td>Forest/shrub/grassland1<sup>2</sup></td>
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<td>Open water and wetlands</td>
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<td></td>
 
−
<td></td>
 
−
<td></td>
 
 
<td></td>
 
<td></td>
 +
<td>see Notes (next column)</td>
 +
<td>
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*If data exist, use the phosphorus concentration for the water body of interest
 +
*If data for a specific lake do not exist, use data from similar lakes in the area
 +
*emcs for wetlands will typically be higher than for lakes in an area. Consider using a value equal to 2 times the value for lakes in an area.
 +
</td>
 
</tr>
 
</tr>
 
<tr>
 
<tr>
−
<td>Open water<sup>2</sup></td>
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<td>Cropland (row crops)</td>
−
<td></td>
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<td>0.126-1.348</td>
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<td></td>
+
<td><sup>2</sup></td>
−
<td></td>
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<td>Median from our review = 0.533</td>
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<td></td>
 
 
</tr>
 
</tr>
 
<tr>
 
<tr>
−
<td>Wetlands<sup>2</sup></td>
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<td>Pasture</td>
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<td></td>
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<td>0.35-0.45</td>
−
<td></td>
+
<td><sup>2</sup></td>
−
<td></td>
 
−
<td><sup>4</sup></td>
 
−
</tr>
 
−
<tr>
 
−
<td>Farmsteads<sup>2</sup></td>
 
−
<td></td>
 
−
<td></td>
 
−
<td></td>
 
−
<td></td>
 
−
</tr>
 
−
<tr>
 
−
<td>Forest</td>
 
−
<td>0.05 - 0.25</td>
 
−
<td>0.25</td>
 
−
<td></td>
 
 
<td></td>
 
<td></td>
 
</tr>
 
</tr>
 
</table>
 
</table>
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<font size=1><sup>1</sup>We recommend using the median from literature reviews and not the means or previous values.<br>
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<font size=1><sup>1</sup>The link takes you to information on calculating event mean concentrations for areas with multiple land uses.<br>
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<sup>2</sup> Minnehaha Creek Watershed district, 2003<br>
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<sup>2</sup>Our literature review was not extensive enough to warrant a specific recommend emc for this land use</font size>
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<sup>3</sup> Robert Pitt et al., 2004<br>
 
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<sup>4</sup> Average for large wetlands and wetland complexes. Individual wetlands should be monitored to determine source/sink behavior.</font size>
 
  
 
<noinclude>
 
<noinclude>
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[[category:table - pollutant information]]
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[[Category:Level 3 - General information, reference, tables, images, and archives/Tables/Pollutant loading, concentrations, and characteristics]]
 +
[[Category:Level 2 - Pollutants/Phosphorus]]
 +
[[Category:Level 2 - Pollutants/Concentrations, export, loads]]
 
</noinclude>
 
</noinclude>

Latest revision as of 16:45, 23 March 2023

Event mean concentrations for total phosphorus.
 Link to this table

Land cover/land use Range (mg/L) Recommended value (mg/L) Notes
Commercial 0.20 - 0.34 0.200 If applicable to models being used, adjust curve numbers/runoff coefficients when calculating loads
Industrial 0.23 - 0.55 0.235
  • If applicable to models being used, adjust curve numbers/runoff coefficients when calculating loads
  • Adjust upward if specific phosphorus sources exist
Residential 0.26 - 0.38 0.325 Concentrations vary widely depending on local conditions
High-density/Multi-family residential 0.28 - 0.40 Calculate1
  • Insufficient information to recommend a specific emc
  • Concentrations vary widely depending on local conditions
Medium density residential 0.18 - 0.40 Calculate1
  • Insufficient information to recommend a specific emc
  • Concentrations vary widely depending on local conditions
Low density residential 0.24 - 0.40 Calculate1
  • Insufficient information to recommend a specific emc
  • Concentrations vary widely depending on local conditions
Freeways/transportation 0.25 - 0.45 0.280
  • Concentrations vary widely depending on inputs
  • Adjust upward for areas receiving large inputs of road salt or sediment or having very heavy traffic loads
  • Adjust downward for low traffic areas or areas with reduced inputs (e.g. little road salt application, limited truck traffic)
Mixed 0.16 - 0.84 0.290
  • Residential land use was the primary land use in most studies that cited values for mixed land use
  • If the study area can be delineated into specific land uses and impervious area for each land use is know, we recommend calculating the emc
Parks and recreation Use value for open space or calculate
  • emc will be a function of vegetative cover
  • Adjust upward if street tree canopy cover is high or pervious areas are primarily grass on compacted soils
Open space 0.12 - 0.31 0.190
Conventional roof 0.01 - 0.20 0.030
Institutional 0.14 - 0.422 See note
  • Use low values in range (0.200 mg/L or less) for facilities such as campuses, where there is considerable pervious area
  • Use high values in range (0.30 mg/L or greater) for areas with considerable impervious surface, such as sports facilities or facilities with large parking areas
Forest/shrub/grassland 0.03 - 0.45 0.090 Concentrations are likely to vary with season in areas with fall leaf drop
Open water and wetlands see Notes (next column)
  • If data exist, use the phosphorus concentration for the water body of interest
  • If data for a specific lake do not exist, use data from similar lakes in the area
  • emcs for wetlands will typically be higher than for lakes in an area. Consider using a value equal to 2 times the value for lakes in an area.
Cropland (row crops) 0.126-1.348 2 Median from our review = 0.533
Pasture 0.35-0.45 2

1The link takes you to information on calculating event mean concentrations for areas with multiple land uses.
2Our literature review was not extensive enough to warrant a specific recommend emc for this land use

Retrieved from "https://stormwater.pca.state.mn.us/index.php?title=Event_mean_concentrations_for_total_phosphorus&oldid=67590"

This page was last edited on 23 March 2023, at 16:45.