Difference between revisions of "Event mean concentrations for total phosphorus"
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<td>0.26 - 0.38</td> | <td>0.26 - 0.38</td> | ||
<td>0.36</td> | <td>0.36</td> | ||
| − | <td>0. | + | <td>0.325</td> |
| − | <td> | + | <td>Concentrations vary widely depending on local conditions</td> |
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Revision as of 17:09, 26 December 2019
Information: This page was updated October 31, 2019. Read table caption below.
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 | Recommended value (mg/L)1 | Notes |
|---|---|---|---|---|
| Commercial2, 3 | 0.20 - 0.34 | 0.17 | 0.20 | If applicable to models being used, adjust curve numbers/runoff coefficients when calculating loads |
| Industrial2, 3 | 0.23 - 0.55 | 0.235 | 0.235 |
|
| Residential3 | 0.26 - 0.38 | 0.36 | 0.325 | Concentrations vary widely depending on local conditions |
| High-density/Multi-family residential2, 3 | 0.28 - 0.40 | 0.28 | Calculate |
|
| Medium density residential | 0.18 - 0.40 | 0.18 | Calculate | *Insufficient information to recommend a specific emc
|
| Low density residential | 0.24 - 0.40 | 0.24 | Calculate |
|
| Freeways/transportation3 | 0.25 - 0.45 | 0.35 |
|
|
| Mixed | 0.25 - 0.45 | 0.29 | ||
| Parks and recreation2 | ||||
| Open space2, 3 | 0.12 - 0.31 | 0.13 | ||
| Conventional roof | 0.05 - 0.20 | 0.09 | ||
| Public/semi public (institutional)2, 3 | 0.18 - 0.40 | 0.26 | ||
| Cropland2 | ||||
| Forest/shrub/grassland12 | ||||
| Open water2 | ||||
| Wetlands2 | 4 | |||
| Farmsteads2 | ||||
| Forest | 0.05 - 0.25 | 0.25 |
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.