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Minnesota Stormwater Manual

Difference between revisions of "Filtration"

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{{alert|The anticipated construction period for this page is January through March, 2013|alert-under-construction}}
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{{alert|The original Manual combined several filtration practices, including sand filters and swales, into a single chapter. We eventually will break some of these practices out into separate chapters.  For now, they continue to be combined into single pages shown below.  NOTE that we have included links to images for sand filters and swales in the outline below.|alert-info}}
  
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Filtering practices include [[Glossary#M|media filters]] (surface, underground, perimeter), [[Glossary#V|vegetative filters]] (filter strips, grass channels), and combination media/vegetative filters (dry swales). Media and media/vegetative filters operate similarly and provide comparable water quality capabilities as bioretention. Vegetative filters are generally more suitable as [[Glossary#P|pre-treatment]] practices, but in some situations can be used on a stand alone basis.
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Filtering practices include [[Glossary#M|media filters]] (surface, underground, perimeter), [[Glossary#V|vegetative filters]] (filter strips, grass channels), and combination media/vegetative filters (dry swales). Media and media/vegetative filters operate similarly and provide comparable water quality capabilities as bioretention. Vegetative filters are generally more suitable as [[Glossary#P|pretreatment]] practices, but in some situations can be used on a stand alone basis.
 
<p>Filtering practices have widespread applicability and are suitable for all land uses, as long as the contributing drainage areas are limited (e.g., typically less than 5 acres). Media filters are not as aesthetically appealing as [[Glossary#B|bioretention]], which makes them more appropriate for commercial or light industrial land uses or in locations that will not receive significant public exposure. Media filters are particularly well suited for sites with high percentages of [[Glossary#I|impervious]] cover (e.g., greater than 50%). Media filters can be designed with an [[Glossary#U|underdrain]], which makes them a good option for treating potential stormwater [[glossary#H|hotspots]] (PSHs). They can also be installed underground to prevent the consumption of valuable land space (often an important retrofit or redevelopment consideration). [[Glossary#V|Vegetative filters]] can be incorporated into landscaped areas, providing dual functionality.</p>
 
<p>Filtering practices have widespread applicability and are suitable for all land uses, as long as the contributing drainage areas are limited (e.g., typically less than 5 acres). Media filters are not as aesthetically appealing as [[Glossary#B|bioretention]], which makes them more appropriate for commercial or light industrial land uses or in locations that will not receive significant public exposure. Media filters are particularly well suited for sites with high percentages of [[Glossary#I|impervious]] cover (e.g., greater than 50%). Media filters can be designed with an [[Glossary#U|underdrain]], which makes them a good option for treating potential stormwater [[glossary#H|hotspots]] (PSHs). They can also be installed underground to prevent the consumption of valuable land space (often an important retrofit or redevelopment consideration). [[Glossary#V|Vegetative filters]] can be incorporated into landscaped areas, providing dual functionality.</p>
  
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<div>[[Overview for swales]]</div>
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*[[Overview for filtration]]
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<div>[[Types of swales]]</div>
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*[[Types of filtration]]
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<div>[[Design criteria for swales]]</div>
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*[[Design criteria for filtration]]
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<div>[[Construction specifications for swales]]</div>
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*[[Construction specifications for filtration]]
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<!--<div>[[Construction observations for swales]]</div>
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<!--<div>[[Construction observations for filtration]]</div>-->
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<div>[[Assessing the performance of swales]]</div>-->
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*[[Assessing the performance of sand (media) filters]]
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<div>[[Operation and maintenance of swales]]</div>
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*[[Assessing the performance of swales]]
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<!--<div>[[Calculating credits for swales]]</div>-->
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*[[Operation and maintenance of filtration]]
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<div>[[Cost-benefit considerations for swales]]</div>
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*[[Calculating credits for sand filter]]
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<!--<div>[[Additional considerations for swales]]</div>-->
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*[[Calculating credits for dry swale (grass swale)]]
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<!--<div>[[Links for swales]]</div>-->
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*[[Cost-benefit considerations for filtration]]
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<div>[[External resources for swales]]
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<!--<div>[[Additional considerations for filtration]]</div>-->
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<div>[[References for swales]]</div>
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<!--<div>[[Links for filtration]]</div>-->
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<!--<div>[[Supporting material for swales]]</div>-->
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<!--<div>[[External resources for filtration]]-->
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*[[Supporting material for swales]]
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*[[References for filtration]]
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<!--<div>[[Supporting material for filtration]]</div>-->
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*[https://stormwater.pca.state.mn.us/index.php?title=Category:Sand_filter_photos Sand filter photos]
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*[https://stormwater.pca.state.mn.us/index.php?title=Category:Sand_filter_schematic Sand filter schematics]
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*[https://stormwater.pca.state.mn.us/index.php?title=Category:Sand_filter_table Sand filter tables]
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Minimal Impact Design Standards pages
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{{alert|If you are using a swale for stormwater infiltration in the MIDS calculator, and the project requires a [[2018 Minnesota Construction Stormwater Permit|construction stormwater general permit]], you must comply with all construction related requirements found in the permit.|alert-danger}}
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*<div>Swale Main Channel: [[Requirements, recommendations and information for using swale without an underdrain as a BMP in the MIDS calculator]]</div>
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*<div>[[Requirements, recommendations and information for using swale with an underdrain as a BMP in the MIDS calculator]]</div>
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*<div>[[Requirements, recommendations and information for using swale side slope as a BMP in the MIDS calculator]]</div>
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*<div>[[Requirements, recommendations and information for using wet swale as a BMP in the MIDS calculator]]</div>
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*<div>[[Requirements, recommendations and information for using sand filter as a BMP in the MIDS calculator]]</div>
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[[Links to .dwg files|Links to CADD files]]
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[[CADD images for individual best management practices|Links to detail images]]
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*Sand filters
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**Perimiter sand filter details: [[File:Perimeter Sand Filter PERIMETER SAND FILTER DETAILS (1).pdf]]
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**Surface sand filter: [[File:SURFACE Sand Filter3 Surface sand filter (1).pdf]]
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**Underground sand filter: [[File:UNDERGROUND SAND FILTER Layout2 (1).pdf]]
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*Swales
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**Swale layout: [[File:Swale Layout2 (1).pdf]]
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**Typical grass channel sections and design matrix (with and without soil amendment): [[File:MIDS Dry Swale Sections-SHEET 1.pdf]].  Contains the following cross-sections.
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***Typical grass channel without soil amendment
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***Typical grass channel with soil amendment
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**Typical dry swale with check dam and draintile: [[File:MIDS Dry Swale Sections-SHEET 2.pdf]]. Contains the following cross-sections and profiles:
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***Typical dry swale check dam
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***Typical dry swale check dam with draintile
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***typical dry swale with draintile
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***typical dry swale profile section with check dams
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***typical dry swale profile section with check dams and draintile
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<font size=3>[[Fact sheet for filtration|'''Fact sheet for filtration''']]</font size>
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<noinclude>
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[[Category:Level 3 - Best management practices/Structural practices/Bioretention‏‎]]
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[[Category:Level 3 - Best management practices/Structural practices/Dry swale]]
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[[Category:Level 3 - Best management practices/Structural practices/Green roof]]
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[[Category:Level 3 - Best management practices/Structural practices/Iron enhanced sand filter‏‎]]
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[[Category:Level 3 - Best management practices/Structural practices/Permeable pavement]]
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[[Category:Level 3 - Best management practices/Structural practices/Sand filter, iron enhanced sand filter, media filter‏‎]]
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[[Category:Level 3 - Best management practices/Structural practices/Step pool‏‎]]
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[[Category:Level 3 - Best management practices/Structural practices/Tree trench and box]]
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[[Category:Level 3 - Best management practices/Structural practices/Wet swale‏‎]]
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</noinclude>

Latest revision as of 23:44, 6 December 2022

Information: The original Manual combined several filtration practices, including sand filters and swales, into a single chapter. We eventually will break some of these practices out into separate chapters. For now, they continue to be combined into single pages shown below. NOTE that we have included links to images for sand filters and swales in the outline below.

Filtering practices include media filters (surface, underground, perimeter), vegetative filters (filter strips, grass channels), and combination media/vegetative filters (dry swales). Media and media/vegetative filters operate similarly and provide comparable water quality capabilities as bioretention. Vegetative filters are generally more suitable as pretreatment practices, but in some situations can be used on a stand alone basis.

Filtering practices have widespread applicability and are suitable for all land uses, as long as the contributing drainage areas are limited (e.g., typically less than 5 acres). Media filters are not as aesthetically appealing as bioretention, which makes them more appropriate for commercial or light industrial land uses or in locations that will not receive significant public exposure. Media filters are particularly well suited for sites with high percentages of impervious cover (e.g., greater than 50%). Media filters can be designed with an underdrain, which makes them a good option for treating potential stormwater hotspots (PSHs). They can also be installed underground to prevent the consumption of valuable land space (often an important retrofit or redevelopment consideration). Vegetative filters can be incorporated into landscaped areas, providing dual functionality.


Minimal Impact Design Standards pages

Warning: If you are using a swale for stormwater infiltration in the MIDS calculator, and the project requires a construction stormwater general permit, you must comply with all construction related requirements found in the permit.

Links to CADD files

Links to detail images

  • Swales
    • Swale layout: File:Swale Layout2 (1).pdf
    • Typical grass channel sections and design matrix (with and without soil amendment): File:MIDS Dry Swale Sections-SHEET 1.pdf. Contains the following cross-sections.
      • Typical grass channel without soil amendment
      • Typical grass channel with soil amendment
    • Typical dry swale with check dam and draintile: File:MIDS Dry Swale Sections-SHEET 2.pdf. Contains the following cross-sections and profiles:
      • Typical dry swale check dam
      • Typical dry swale check dam with draintile
      • typical dry swale with draintile
      • typical dry swale profile section with check dams
      • typical dry swale profile section with check dams and draintile


Fact sheet for filtration

Retrieved from "https://stormwater.pca.state.mn.us/index.php?title=Filtration&oldid=63627"

This page was last edited on 6 December 2022, at 23:44.