Difference between revisions of "BMP pollutant removal for phosphorus"
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| − | + | <font size=3>'''This table shows comparison of phosphorus removal for different BMPs.<sup>a,e,f</sup> Values represent the percent of incoming pollutant that is removed. Source: MPCA Minnesota Stormwater Manual.</font size>'''<br> | |
| − | Link to this [[BMP pollutant removal for phosphorus|table]] | + | Link to this [[BMP pollutant removal for phosphorus|table]] |
{{alert|Removal rates shown here are composite averages intended solely for use in comparing performance between BMP designs and for use in calculating load reduction in site-based TP models. They have been adapted, rounded and slightly discounted from statistical values published in BMP performance databases.|alert-caution}} | {{alert|Removal rates shown here are composite averages intended solely for use in comparing performance between BMP designs and for use in calculating load reduction in site-based TP models. They have been adapted, rounded and slightly discounted from statistical values published in BMP performance databases.|alert-caution}} | ||
<table class="sortable"> | <table class="sortable"> | ||
Revision as of 00:37, 26 March 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 |
|---|---|---|---|---|
| Bioretention | Underdrain | 65 | 75 | 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 | 70 |
| Multiple pond | 60 | 75 | 75 | |
| Stormwater wetlands | Shallow wetland | 40 | 55 | 50 |
| Pond/wetland | 55 | 75 | 65 |
a
Removal 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
h
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.