Difference between revisions of "BMP pollutant removal for phosphorus"
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| − | <p><font size=2><sup>a</sup> Removal rates show in table are a composite of five sources: [ | + | <p><font size=2><sup>a</sup> Removal rates show in table are a composite of five sources: [http://www.bmpdatabase.org ASCE/EPA International Database]</p> |
| − | <p>http://yosemite.epa.gov/r10/water.nsf/95537302e2c56cea8825688200708c9a/159859e0c556f1c988256b7f007525b9/$FILE/Evaluating%20the%20Impact%20of%20Watershed%20Treatment.pdf Caraco] (Center for Watershed protection, 2001) | + | <p>[http://yosemite.epa.gov/r10/water.nsf/95537302e2c56cea8825688200708c9a/159859e0c556f1c988256b7f007525b9/$FILE/Evaluating%20the%20Impact%20of%20Watershed%20Treatment.pdf Caraco] (Center for Watershed protection, 2001)</p> |
<p>[http://www.mde.state.md.us/programs/Water/StormwaterManagementProgram/MarylandStormwaterDesignManual/Pages/programs/waterprograms/sedimentandstormwater/stormwater_design/index.aspx Maryland Department of the Environment](2000)]</p> | <p>[http://www.mde.state.md.us/programs/Water/StormwaterManagementProgram/MarylandStormwaterDesignManual/Pages/programs/waterprograms/sedimentandstormwater/stormwater_design/index.aspx Maryland Department of the Environment](2000)]</p> | ||
Revision as of 20:31, 14 February 2013
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: ASCE/EPA International Database
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.