Difference between revisions of "Guidance on calculating volumes for underground infiltration BMPs in the MIDS calculator"
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[[file:Schematic used for calculating volumes.png|300px|thumb|alt=schematic for calculator calculations|<font size=3>Schematic used for determining inputs for the Underground infiltration BMP for the MIDS calculator.</font size>]] | [[file:Schematic used for calculating volumes.png|300px|thumb|alt=schematic for calculator calculations|<font size=3>Schematic used for determining inputs for the Underground infiltration BMP for the MIDS calculator.</font size>]] | ||
| − | The Minimal Impact Design Standards calculator requires a user to input a value for water stored in an underground infiltration practice below the outflow (overflow) pipe and the top of the underlying soil or engineered media. This is not a straightforward calculation because there are a wide variety of underground pipe shapes and because two different calculations must be made - one for storage in the pipe and another for storage in the media surrounding the pipe. If engineered media is used in the practice, the calculator also requires a calculation of the surface area of the engineered media. This calculation is fairly simple. Both these calculations can be made using a spreadsheet developed for this purpose. | + | The [https://stormwater.pca.state.mn.us/index.php?title=MIDS_calculator Minimal Impact Design Standards calculator] requires a user to input a value for water stored in an underground infiltration practice below the outflow (overflow) pipe and above the top of the underlying soil or engineered media. This is not a straightforward calculation because there are a wide variety of underground pipe shapes and because two different calculations must be made - one for storage in the pipe and another for storage in the media surrounding the pipe. If engineered media is used in the practice, the calculator also requires a calculation of the surface area of the engineered media. This calculation is fairly simple. Both these calculations can be made using a spreadsheet developed for this purpose. Water storage in an underground system is shown in the schematic to the right. |
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[[file:Schematic hex or rectangle pipes.png|300px|thumb|alt=schematic for hex pipes|<font size=3>Schematic used for calculating volumes for hexagonal or rectangular pipes.</font size>]] | [[file:Schematic hex or rectangle pipes.png|300px|thumb|alt=schematic for hex pipes|<font size=3>Schematic used for calculating volumes for hexagonal or rectangular pipes.</font size>]] | ||
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==Calculating underground pipe storage volume (V<sub>P</sub>)== | ==Calculating underground pipe storage volume (V<sub>P</sub>)== | ||
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Revision as of 21:14, 19 December 2016
This site is currently undergoing revision. For more information, open this link.
This page is in development and will contain guidance on calculating volumes for underground infiltration practices in the MIDS calculator
This page is in development and will contain guidance on calculating volumes for underground infiltration practices in the MIDS calculator
The Minimal Impact Design Standards calculator requires a user to input a value for water stored in an underground infiltration practice below the outflow (overflow) pipe and above the top of the underlying soil or engineered media. This is not a straightforward calculation because there are a wide variety of underground pipe shapes and because two different calculations must be made - one for storage in the pipe and another for storage in the media surrounding the pipe. If engineered media is used in the practice, the calculator also requires a calculation of the surface area of the engineered media. This calculation is fairly simple. Both these calculations can be made using a spreadsheet developed for this purpose. Water storage in an underground system is shown in the schematic to the right.
