Difference between revisions of "Requirements, recommendations and information for using bioretention BMPs in the MIDS calculator"
(Created page with "#Required *3 foot separation from the bottom of the bioretention system to seasonal high water table *Use most restrictive infiltration rate within 3 feet of the bottom of the...") |
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| − | + | *Required | |
| − | *3 foot separation from the bottom of the bioretention system to seasonal high water table | + | **3 foot separation from the bottom of the bioretention system to seasonal high water table |
| − | *Use most restrictive infiltration rate within 3 feet of the bottom of the BMP | + | **Use most restrictive infiltration rate within 3 feet of the bottom of the BMP |
| − | *Drawdown time of 24 hours for trout streams | + | **Drawdown time of 24 hours for trout streams |
| − | *For measured infiltration rates, apply a safety factor of 2 (2.5 for permeable pavement) | + | **For measured infiltration rates, apply a safety factor of 2 (2.5 for permeable pavement) |
| − | *Pretreatment | + | **Pretreatment |
| − | + | *Recommend | |
| − | *5 acre or less for contributing area | + | **5 acre or less for contributing area |
| − | *Maximum ponding depth of 18 inches, reduced to 6 inches if there is no site information (4 feet for infiltration basin) | + | **Maximum ponding depth of 18 inches, reduced to 6 inches if there is no site information (4 feet for infiltration basin) |
| − | *Field tested infiltration rates over table values | + | **Field tested infiltration rates over table values |
| − | + | *Information – provide links to the following*Guidance on determining infiltration rates | |
| − | *Information site constraints (shallow soil, karst, etc.) | + | **Information site constraints (shallow soil, karst, etc.) |
| − | *Information on assessing BMPs | + | **Information on assessing BMPs |
| − | *Information on design metrics (high flow bypass, ponding depths, drawn down) | + | **Information on design metrics (high flow bypass, ponding depths, drawn down) |
| − | *Guidance on pretreatment | + | **Guidance on pretreatment |
| − | *Information on soil mixes | + | **Information on soil mixes |
| − | *Plant information, including species list that show water tolerance, potential effects of different species on infiltration rates, planting guidance | + | **Plant information, including species list that show water tolerance, potential effects of different species on infiltration rates, planting guidance |
| − | *Construction specifications | + | **Construction specifications |
| − | *Information on operation and maintenance | + | **Information on operation and maintenance |
| + | |||
| − | |||
*3 foot separation from the bottom of the bioretention system to seasonal high water table | *3 foot separation from the bottom of the bioretention system to seasonal high water table | ||
*Use most restrictive infiltration rate within 3 feet of the bottom of the BMP | *Use most restrictive infiltration rate within 3 feet of the bottom of the BMP | ||
Revision as of 16:24, 6 May 2013
- Required
- 3 foot separation from the bottom of the bioretention system to seasonal high water table
- Use most restrictive infiltration rate within 3 feet of the bottom of the BMP
- Drawdown time of 24 hours for trout streams
- For measured infiltration rates, apply a safety factor of 2 (2.5 for permeable pavement)
- Pretreatment
- Recommend
- 5 acre or less for contributing area
- Maximum ponding depth of 18 inches, reduced to 6 inches if there is no site information (4 feet for infiltration basin)
- Field tested infiltration rates over table values
- Information – provide links to the following*Guidance on determining infiltration rates
- Information site constraints (shallow soil, karst, etc.)
- Information on assessing BMPs
- Information on design metrics (high flow bypass, ponding depths, drawn down)
- Guidance on pretreatment
- Information on soil mixes
- Plant information, including species list that show water tolerance, potential effects of different species on infiltration rates, planting guidance
- Construction specifications
- Information on operation and maintenance
- 3 foot separation from the bottom of the bioretention system to seasonal high water table
- Use most restrictive infiltration rate within 3 feet of the bottom of the BMP
- Drawdown time of 24 hours for trout streams
- For measured infiltration rates, apply a safety factor of 2 (2.5 for permeable pavement)
- Pretreatment
- Recommend
- 5 acre or less for contributing area
- Maximum ponding depth of 18 inches, reduced to 6 inches if there is no site information (4 feet for infiltration basin)
- Field tested infiltration rates over table values
- Information – provide links to the following
- Guidance on determining infiltration rates
- Information site constraints (shallow soil, karst, etc.)
- Information on assessing BMPs
- Information on design metrics (high flow bypass, ponding depths, drawn down)
- Guidance on pretreatment
- Information on soil mixes
- Plant information, including species list that show water tolerance, potential effects of different species on infiltration rates, planting guidance
- Construction specifications
- Information on operation and maintenance