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{{alert|This page is an edit and testing page use by the wiki authors.  It is not a content page for the Manual. Information on this page may not be accurate and should not be used as guidance in managing stormwater.|alert-danger}}
 
{{alert|This page is an edit and testing page use by the wiki authors.  It is not a content page for the Manual. Information on this page may not be accurate and should not be used as guidance in managing stormwater.|alert-danger}}
  
[[A tour of the Minnesota Stormwater Manual content]]
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==Phosphorus quiz==
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#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>
 +
#Median concentrations of total phosphorus in stormwater are about how many times greater than water quality standards? 1, 3, 10<p style="color:red;">Approximately 3 - 0.30 mg/L compared to 0.10 mg/L, though concentrations and standards vary</p>
 +
#True or false: Most phosphorus in stormwater runoff is in dissolved forms.<p style="color:red;">False - particulate P is about 60 percent of TP across all land uses, with the percent being higher in industrial/transportation settings and lower in residential settings.</p>
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#Which of these is a more important source of dissolved phosphorus: sediment or organic material (e.g. leaves).<p style="color:red;">Organic material, including plant material and animal waste</p>
 +
#Street sweeping for phosphorus would be more effective in which of these: downtown Minneapolis, a high canopy area in St. Paul, a new development in Maple Grove<p style="color:red;">A high canopy area in St. Paul, due to the importance of organic material as a source of dissolved P</p>
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#Reasons why stormwater ponds export phosphorus include which of the following (select all that apply): turn over too frequently, turn over too infrequently, oxygen exists in the hypolimnion, inadequate maintenance, excess organic material entering the pond, excess canopy cover adjacent to pond prevents mixing<p style="color:red;">Ponds that turn over infrequently, that are poorly maintained, that have high organic inputs, and that are shaded and therefore not mixed have a greater tendency to export P</p>
 +
#True or false: Biochar is effective at absorbing phosphorus<p style="color:red;">False. Biochar does not appear to leach P, but it has not been show to absorb P.</p>
 +
#At about what % compost will bioretention media begin to leach phosphorus: 5, 10, 20<p style="color:red;">We aren't sure what the cutoff is yet, but research suggests compost concentrations of greater than 5% in bioretention media will leach P.</p>
 +
#True or false: Infiltration of stormwater runoff is an excellent method for reducing phosphorus loading to surface water<p style="color:red;">True. P is attenuated in the unsaturated zone and in groundwater</p>
 +
#True or false: in residential areas, runoff from surfaces considered to be permeable is an important source of dissolved phosphorus<p style="color:red;">True. Runoff from frozen soils and overirrigated lawns are considered important sources of dissolved P, though more research is needed to quantify these sources.</p>
  
This page provides an overview and tour of the content in the Minnesota Stormwater Manual. The focus is on understanding content. There is other guidance on the manual wiki, including the following.
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==a==
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This page provides guidance related to assessing the [https://stormwater.pca.state.mn.us/index.php?title=Total_Suspended_Solids_(TSS)_in_stormwater total suspended sediment] (TSS) and [https://stormwater.pca.state.mn.us/index.php?title=Phosphorus total phosphorus] (TP) removal efficiency of permittee owned/operated [https://stormwater.pca.state.mn.us/index.php?title=Stormwater_ponds ponds] constructed and used for the collection and treatment of stormwater. Four (4) evaluation strategies are discussed.
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*Evaluation of Minnesota Pollution Control Agency (MPCA) stormwater pond design criteria
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*Stormwater pond inspection/assessment
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*Stormwater pond pollutant removal modeling
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*Stormwater pond water quality monitoring
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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 [https://stormwater.pca.state.mn.us/index.php?title=Design_criteria_for_stormwater_ponds#Physical_feasibility_initial_check sized correctly] for their contributing drainage area and that pond inspection and [https://stormwater.pca.state.mn.us/index.php?title=Assessing_the_performance_of_stormwater_ponds assessments] be performed routinely to monitor sedimentation and identify potential [https://stormwater.pca.state.mn.us/index.php?title=Operation_and_maintenance_of_stormwater_ponds 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.
  
*[[About the Minnesota Stormwater Manual]]
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Guidance presented will assist <span title="A municipal separate storm sewer system (MS4) is a means of transportation, individually or in a system, (e.g. roads with drainage systems, municipal streets, catch basins, curbs, gutters, ditches, man-made channels, storm drains, etc.) that are: owned or operated by a public entity (e.g. cities, townships, counties, military bases, hospitals, prison complexes, highway departments, universities, etc.) with jurisdiction over disposal of sewage, industrial wastes, stormwater, or other wastes. This includes special districts under State law (sewer, flood control, or drainage districts, etc.), an authorized Indian tribal organization, or a designated and approved management agency under section 208 of the Clean Water Act; designed or used for collecting or transporting stormwater; not a combined sewer; and not part of a publicly owned treatment works."> '''MS4s'''</span> (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.
*[[Guidance - General Information]]
 
*[[Navigating the website]]
 
*[[Finding a topic]]
 
*[[The left sidebar]]
 
*[[Communicating with us]]
 
*[[Tables, images and downloadable files]]
 
*[[Guidance for wiki editors]]
 
*[[Help:Contents]]
 
  
==Types of information in the Manual==
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[[TSS and TP Removal Efficiency Evaluation Strategies]]
A good way to see the types of information in the Manual is to click on ''[[Categories|Index (Categories)]]'' in the left toolbar. Categories are a way of grouping links to pages that have a similar theme or subject matter. Visualizing the categories provides insight into the information in the Manual.
 
  
Some examples of the information in the Manual include the following.
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==b==
*Technical: The Manual mainly provides technical information to users. Examples include the following. The links following each item provide example pages in the Manual.
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==c==
**Design of best management practices (BMPs) [https://stormwater.pca.state.mn.us/index.php?title=Category:Design_criteria]
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==d==
**Construction of BMPs [https://stormwater.pca.state.mn.us/index.php?title=Category:Construction_specifications]
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[[A tour of the Minnesota Stormwater Manual content]]
**Operation and maintenance of BMPs [https://stormwater.pca.state.mn.us/index.php?title=Category:Operation_and_maintenance]
 
**Assessment of BMP performance [https://stormwater.pca.state.mn.us/index.php?title=Category:Assessing_performance]
 
**Models [https://stormwater.pca.state.mn.us/index.php?title=Category:Models_and_calculators]
 
**Pollutant information
 
*General
 
*Permit (Regulatory)
 
*Case studies
 
*Fact sheets
 
*Checklists and inspection sheets
 
*Cost information
 
*Education
 
 
 
==Images (photos, schematics, etc.)==
 
  
==Tables==
 
  
==Events, News, Funding==
 
  
  

Latest revision as of 14:54, 19 October 2020

Warning: This page is an edit and testing page use by the wiki authors. It is not a content page for the Manual. Information on this page may not be accurate and should not be used as guidance in managing stormwater.

Phosphorus quiz

  1. Dissolved phosphorus is about how many times more bioavailable than particulate phosphorus? 1, 5, 20

    5. Dissolved P is about 90 percent bioavailable, compared to about 20% for particulate P

  2. Median concentrations of total phosphorus in stormwater are about how many times greater than water quality standards? 1, 3, 10

    Approximately 3 - 0.30 mg/L compared to 0.10 mg/L, though concentrations and standards vary

  3. True or false: Most phosphorus in stormwater runoff is in dissolved forms.

    False - particulate P is about 60 percent of TP across all land uses, with the percent being higher in industrial/transportation settings and lower in residential settings.

  4. Which of these is a more important source of dissolved phosphorus: sediment or organic material (e.g. leaves).

    Organic material, including plant material and animal waste

  5. Street sweeping for phosphorus would be more effective in which of these: downtown Minneapolis, a high canopy area in St. Paul, a new development in Maple Grove

    A high canopy area in St. Paul, due to the importance of organic material as a source of dissolved P

  6. Reasons why stormwater ponds export phosphorus include which of the following (select all that apply): turn over too frequently, turn over too infrequently, oxygen exists in the hypolimnion, inadequate maintenance, excess organic material entering the pond, excess canopy cover adjacent to pond prevents mixing

    Ponds that turn over infrequently, that are poorly maintained, that have high organic inputs, and that are shaded and therefore not mixed have a greater tendency to export P

  7. True or false: Biochar is effective at absorbing phosphorus

    False. Biochar does not appear to leach P, but it has not been show to absorb P.

  8. At about what % compost will bioretention media begin to leach phosphorus: 5, 10, 20

    We aren't sure what the cutoff is yet, but research suggests compost concentrations of greater than 5% in bioretention media will leach P.

  9. True or false: Infiltration of stormwater runoff is an excellent method for reducing phosphorus loading to surface water

    True. P is attenuated in the unsaturated zone and in groundwater

  10. True or false: in residential areas, runoff from surfaces considered to be permeable is an important source of dissolved phosphorus

    True. Runoff from frozen soils and overirrigated lawns are considered important sources of dissolved P, though more research is needed to quantify these sources.

a

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.

  • Evaluation of Minnesota Pollution Control Agency (MPCA) stormwater pond design criteria
  • Stormwater pond inspection/assessment
  • Stormwater pond pollutant removal modeling
  • Stormwater pond water quality monitoring

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

b

c

d

A tour of the Minnesota Stormwater Manual content









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This page was last edited on 19 October 2020, at 14:54.

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