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==Phosphorus quiz== | ==Phosphorus quiz== | ||
− | #Dissolved phosphorus is about how many times more bioavailable than particulate phosphorus? 1, 5, 20 <p style="color:red;"> | + | #Dissolved phosphorus is about how many times more bioavailable than particulate phosphorus? 1, 5, 20 <p style="color:red;"> 5. Dissolved P is about 90 percent bioavailable, compared to about 20% for particulate P</p> |
− | 5. Dissolved P is about 90 percent bioavailable, compared to about 20% for particulate P</p> | ||
#Median concentrations of total phosphorus in stormwater are about how many times greater than water quality standards? 1, 3, 10 | #Median concentrations of total phosphorus in stormwater are about how many times greater than water quality standards? 1, 3, 10 | ||
#True or false: Most phosphorus in stormwater runoff is in dissolved forms. | #True or false: Most phosphorus in stormwater runoff is in dissolved forms. |
5. Dissolved P is about 90 percent bioavailable, compared to about 20% for particulate P
This page provides guidance related to assessing the total suspended sediment (TSS) and total phosphorus (TP) removal efficiency of permittee owned/operated ponds constructed and used for the collection and treatment of stormwater. Four (4) evaluation strategies are discussed.
The TSS and TP removal efficiency of constructed stormwater ponds degrades over time due to the loss of storage volume to sedimentation and/or sediment phosphorus release. For this reason, it is critical that stormwater ponds be sized correctly for their contributing drainage area and that pond inspection and assessments be performed routinely to monitor sedimentation and identify potential maintenance needs. In addition to evaluating pollutant removal efficiency through comparison to design standards and evaluation of sedimentation, the water quality performance of stormwater ponds can be evaluated using various water quality modeling programs or measured directly through water quality monitoring.
Guidance presented will assist MS4s (Municipal Separate Storm Sewer System) evaluate the TSS and TP treatment effectiveness of ponds post-construction and over their design life. The adjacent table provides a summary of the four (4) TSS and TP removal efficiency evaluation strategies discussed within this memorandum.
TSS and TP Removal Efficiency Evaluation Strategies
A tour of the Minnesota Stormwater Manual content