Difference between revisions of "BMP pollutant removal for phosphorus"
m |
m |
||
| Line 11: | Line 11: | ||
</tr> | </tr> | ||
<tr> | <tr> | ||
| − | <td rowspan="2">Bioretention</td> | + | <td rowspan="2">Bioretention<sup>f</sup></td> |
<td>Underdrain</td> | <td>Underdrain</td> | ||
<td>50</td> | <td>50</td> | ||
| Line 60: | Line 60: | ||
<td>50</td> | <td>50</td> | ||
<td>65</td> | <td>65</td> | ||
| − | <td> | + | <td>0</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
| Line 66: | Line 66: | ||
<td>60</td> | <td>60</td> | ||
<td>75</td> | <td>75</td> | ||
| − | <td> | + | <td>0</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
| Line 73: | Line 73: | ||
<td>40</td> | <td>40</td> | ||
<td>55</td> | <td>55</td> | ||
| − | <td> | + | <td>0</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
| Line 79: | Line 79: | ||
<td>55</td> | <td>55</td> | ||
<td>75</td> | <td>75</td> | ||
| − | <td> | + | <td>0</td> |
</tr> | </tr> | ||
</table> | </table> | ||
| − | <font size= | + | <font size=1><sup>a</sup>Removal rates show in table are a composite of five sources: |
*Caraco (Center for Watershed protection, 2001) | *Caraco (Center for Watershed protection, 2001) | ||
*Maryland Department of the Environment](2000) | *Maryland Department of the Environment](2000) | ||
*Winer (Center for Watershed Protection, 2000) | *Winer (Center for Watershed Protection, 2000) | ||
*P8 modeling (William Walker) | *P8 modeling (William Walker) | ||
| − | |||
| − | |||
<sup>b</sup> Average removal efficiency expected under MPCA Sizing Rules 1 and 3<br> | <sup>b</sup> Average removal efficiency expected under MPCA Sizing Rules 1 and 3<br> | ||
<sup>c</sup> Upper limit on phosphorus removal with increased sizing and design features, based on national review<br> | <sup>c</sup> Upper limit on phosphorus removal with increased sizing and design features, based on national review<br> | ||
| Line 96: | Line 94: | ||
<sup>f</sup> Note that the performance numbers apply only to that portion of total flow actually being treated; it does not include any runoff that bypasses the BMP<br> | <sup>f</sup> Note that the performance numbers apply only to that portion of total flow actually being treated; it does not include any runoff that bypasses the BMP<br> | ||
<sup>g</sup>Note that soluble P can transfer from surface water to groundwater, but this column refers only to surface water<br> | <sup>g</sup>Note that soluble P can transfer from surface water to groundwater, but this column refers only to surface water<br> | ||
| − | <sup>h</sup | + | <sup>h</sup>Note that 100% is assumed for all infiltration, but only for that portion of the flow fully treated in the infiltration facility; by-passed runoff or runoff diverted via underdrain does not receive this level of treatment.</font size> |
[[category:table]] | [[category:table]] | ||
Revision as of 14:49, 10 April 2013
This table shows comparison of phosphorus removal for different BMPs.a,e,f Values represent the percent of incoming pollutant that is removed. Source: MPCA Minnesota Stormwater Manual.
Link to this table
| BMP group | BMP design variation | Average TP removal rateb | Maximum TP removal ratec | Average soluble P removal rated,g |
|---|---|---|---|---|
| Bioretentionf | Underdrain | 50 | 65 | 60 |
| Infiltration | 100 | 100 | 100 | |
| Filtration | Sand filter | 50 | 55 | 0 |
| Dry swale | 0 | 55 | 0 | |
| Wet swale | 65 | 75 | 70 | |
| Infiltrationf | Infiltration trench | 100 | 100 | 100 |
| Infiltration basin | 100 | 100 | 100 | |
| Stormwater ponds | Wet pond | 50 | 65 | 0 |
| Multiple pond | 60 | 75 | 0 | |
| Stormwater wetlands | Shallow wetland | 40 | 55 | 0 |
| Pond/wetland | 55 | 75 | 0 |
aRemoval rates show in table are a composite of five sources:
- Caraco (Center for Watershed protection, 2001)
- Maryland Department of the Environment](2000)
- Winer (Center for Watershed Protection, 2000)
- P8 modeling (William Walker)
b Average removal efficiency expected under MPCA Sizing Rules 1 and 3
c Upper limit on phosphorus removal with increased sizing and design features, based on national review
d Average rate of soluble phosphorus removal in the literature
e See section on calculating credits for each BMP in this Manual.
f Note that the performance numbers apply only to that portion of total flow actually being treated; it does not include any runoff that bypasses the BMP
gNote that soluble P can transfer from surface water to groundwater, but this column refers only to surface water
hNote that 100% is assumed for all infiltration, but only for that portion of the flow fully treated in the infiltration facility; by-passed runoff or runoff diverted via underdrain does not receive this level of treatment.