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• Requirements, recommendations and information for using swale without an underdrain as a BMP in the MIDS calculator
  ...been reduced from 73 to 68 percent to match the TSS reduction. Particulate pollutant removal cannot exceed sediment removal. ...t input a value for impervious area or the BMP will not provide volume and pollutant reduction. Other fields are optional.</font size>]]
  33 KB (5,347 words) - 13:38, 29 January 2023
• Information on pollutant removal by BMPs
  ...ollutant removal mechanism swale with underdrain|<font size=3>Schematic of pollutant removal mechanisms for a dry swale with an underdrain.</font size>]] ...s. To see updates to credits, see the page called [[Updates to credits and pollutant removal values]].
  36 KB (5,227 words) - 00:44, 23 January 2023
• Case study for using the MIDS calculator to meet TMDL permit requirements
  The following case study highlights an example <span title="the amount of a pollutant from both point and nonpoint sources that a waterbody can receive and still ...to the impaired waterbody. Because the WLA applies to the impaired water, pollutant reduction achieved within the MS4 but not within the tributary area to the
  26 KB (3,924 words) - 16:08, 12 January 2023
• Water quality criteria
  ...2000) established a performance goal that BMPs provide a minimum degree of pollutant removal for a defined fraction of stormwater runoff events, which has been [[File:Schematic of total storage volume.jpg|thumb|300px|alt=schematic showing total storage volume|<font size=3>Illustration of total storage vol
  8 KB (1,248 words) - 19:16, 6 December 2022
• Decision tools for stormwater infiltration
  ...g/L). The concentration of zinc in runoff from an area is 6 mg/L. Expected pollutant removal rates are 65 percent for underground infiltration and 80 percent fo ...thumb|300px|alt=schematic used for infiltration basin example|<font size=3>Schematic showing dimensions for an infiltration basin. The average cross-sectional a
  23 KB (3,334 words) - 17:06, 11 January 2023
• Stormwater infiltration and setback (separation) distances
  ...t=schematic showing horizontal and vertical setback distances|<font size=3>Schematic showing some horizontal and vertical separation distances from an infiltrat ...m bottom of infiltration BMP to water table or top of bedrock|<font size=3>Schematic illustrating separation distance from bottom of infiltration BMP to water t
  18 KB (2,702 words) - 20:15, 18 January 2024
• Requirements, recommendations and information for using swale with an underdrain as a BMP in the MIDS calculator
  ...t input a value for impervious area or the BMP will not provide volume and pollutant reduction. Other fields are optional.</font size>]] ...umb|alt=Schematic of Swale with underdrain BMP parameters tab|<font size=3>Schematic of BMP parameters tab for Swale main channel (with underdrain). The user mu
  31 KB (4,982 words) - 13:36, 29 January 2023
• Scenario for developing a stormwater treatment train for a retrofit site
  [[file:Retrofit Scenario Base.PNG|300px|thumb|alt=schematic showing layout for an urban retrofit treatment train scenario|<font size=3> ...zed in the following table and the existing site layout can be seen in the schematic to the right.
  31 KB (4,411 words) - 13:21, 12 February 2023
• Requirements, recommendations and information for using trees as a BMP in the MIDS calculator
  [[File:watershed tab tree trench no underdrain.png|300px|thumb|alt=schematic of watershed tab for tree trench in MIDS calculator|<font size=3>Screen sho ..., the user must input the following parameters to calculate the volume and pollutant load reductions associated with the BMP.
  33 KB (5,371 words) - 19:08, 23 November 2022
• Scenario for developing a stormwater treatment train for constructed ponds in new development
  ...s schematic shows a New Residential Development Scenario Base|<font size=3>Schematic illustrating the site layout for this example. The site consists of 40 acr ...ater ponds in series approach. The existing site layout can be seen in the schematic to the right. The table below describes the site conditions for this new de
  44 KB (6,330 words) - 13:35, 12 February 2023
• Examples for completing the TMDL reporting form
  ...owing the location of structural BMPs that require estimated reductions in pollutant loading ([http://stormwater.pca.state.mn.us/index.php/Phase_I_MS4_Guidance_ ...ocation of non-structural BMPs that do not require estimated reductions in pollutant loading ([http://stormwater.pca.state.mn.us/index.php/Phase_I_MS4_Guidance_
  32 KB (5,079 words) - 15:54, 5 January 2023
• Turf
  ...his is due to the tendency for flow to channelize beyond 100 feet. In this schematic, the effective pervious area equals 100 feet times the length of parking ar ...t of MIDS Performance Goal Alternatives: Runoff Volumes, Runoff Rates, and Pollutant Removal Efficiencies] report for additional information on the hydrologic m
  31 KB (4,529 words) - 21:31, 16 February 2023
• Pre-treatment considerations for stormwater infiltration
  [[file:Situations where pretreatment is important.png|600px|thumb|alt=schematic of important situations for pretreatment|<font size=3>Conditions when pretr *'''Areas where stormwater has a high pollutant load'''. Areas with a high pollutant load, or the presence of certain pollutants that are not easily removed fro
  10 KB (1,453 words) - 20:44, 2 February 2023
• Requirements, recommendations and information for using bioretention with an underdrain BMPs in the MIDS calculator
  ...t input a value for impervious area or the BMP will not provide volume and pollutant reduction. Other fields are optional.</font size>]] ...in infiltrated water are credited as being removed, while a portion of the pollutant loads in the stormwater that flows through the underdrain are removed throu
  55 KB (8,696 words) - 13:27, 29 January 2023
• Shallow groundwater
  ...ic.jpg|300 px|thumb|alt=schematic illustrating depth to water|<font size=3>Schematic illustrating how depth to water is calculated. Note that a temporary mound ...can occur in the [[Glossary#V|vadose zone]] beneath the base of the BMP. Pollutant removal in the vadose zone is attained via biological activity, chemical de
  12 KB (1,783 words) - 13:13, 15 February 2023
• Stormwater pollutant concentrations and event mean concentrations
  ...runoff. For example, the Simple Method, which is commonly used to estimate pollutant loading, utilizes the following equation :L = Load of a pollutant in pounds per year;
  27 KB (3,838 words) - 17:36, 2 February 2023
• Design criteria for iron enhanced sand filter
  ...on and filtration systems can minimize the maintenance burden and maintain pollutant removal efficiency. Key examples include ...on enhanced sand filter basin|<font size=3>Iron-enhanced sand filter basin schematic.</font size>]]
  12 KB (1,856 words) - 19:00, 28 December 2022
• Overview for stormwater ponds
  ...ination with other practices, <span title="The stormwater runoff volume or pollutant reduction achieved toward meeting a runoff volume or water quality goal."> ...ection. This is desirable because dry ponds have limited effectiveness for pollutant removal. Alternatively, new ponds can be installed in available open areas
  12 KB (1,884 words) - 21:46, 7 February 2023
• Engineered (bioretention) media mixes for stormwater applications
  ...nitrogen is the target pollutant. In areas where phosphorus is the target pollutant, a lower concentration of fines (8 percent) should be used. A soil phosphor ...ure stormwater runoff and allow it to infiltrate into the underlying soil. Pollutant removal occurs through a variety of mechanisms, including adsorption, absor
  19 KB (2,815 words) - 14:19, 17 January 2023
• Scenario for developing a stormwater treatment train for a site with limited infiltration capacity
  [[file:Limited infiltration site layout.jpg|300px|thumb|alt=schematic showing layout for treatment train scenario|<font size=3>Site layout for a .... The goal of the project is to implement BMPs at this site to help reduce pollutant loading (phosphorus and total suspended solids) and reduce the peak volume
  38 KB (5,550 words) - 13:29, 12 February 2023

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