Difference between revisions of "Stormwater infiltration BMPs - contributing drainage area"
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<th>Recommended contributing area</th> | <th>Recommended contributing area</th> | ||
<th>Notes</th> | <th>Notes</th> | ||
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<td>50 acres or less</td> | <td>50 acres or less</td> | ||
<td>A natural or constructed impoundment that captures, temporarily stores and infiltrates the design volume of water into the surrounding naturally permeable soil over several days. In the case of a constructed basin, the impoundment is created by excavation or embankment.</td> | <td>A natural or constructed impoundment that captures, temporarily stores and infiltrates the design volume of water into the surrounding naturally permeable soil over several days. In the case of a constructed basin, the impoundment is created by excavation or embankment.</td> | ||
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<td>5 acres or less</td> | <td>5 acres or less</td> | ||
<td>Bioinfiltration basins must meet the required 48 hour drawdown time and must be sized in order to allow for adequate maintenance. It is HIGHLY RECOMMENDED that bioinfiltration basins be designed to prevent high levels of bounce as submerging vegetation may inhibit plant growth. A maximum wet storage depth of 1.5 feet is HIGHLY RECOMMENDED.</td> | <td>Bioinfiltration basins must meet the required 48 hour drawdown time and must be sized in order to allow for adequate maintenance. It is HIGHLY RECOMMENDED that bioinfiltration basins be designed to prevent high levels of bounce as submerging vegetation may inhibit plant growth. A maximum wet storage depth of 1.5 feet is HIGHLY RECOMMENDED.</td> | ||
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<td>Infiltration Trench | <td>Infiltration Trench | ||
<td>5 acres or less</td> | <td>5 acres or less</td> | ||
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<td></td> | <td></td> | ||
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Synonym: Infiltration Tube, French Drain, Soak‐Away Pits, Soak Holes</td> | Synonym: Infiltration Tube, French Drain, Soak‐Away Pits, Soak Holes</td> | ||
<td>1 acre or less (rooftop only)</td> | <td>1 acre or less (rooftop only)</td> | ||
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<td></td> | <td></td> | ||
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<td>Underground Infiltration</td> | <td>Underground Infiltration</td> | ||
<td>10 acres or less</td> | <td>10 acres or less</td> | ||
| − | <td> | + | <td>Though feasible, larger underground infiltration systems may cause groundwater contamination as water is not able to infiltrate through a surface cover. In addition, wind flocculation, UV degradation, and bacterial degradation, which provide additional treatment in surface systems, do not occur in underground systems. Because performance research is lacking for larger features, it is HIGHLY RECOMMENDED that the contributing drainage area to a single device not exceed 10 acres.</td> |
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</tr> | </tr> | ||
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<td>Dry Swale with Check Dams</td> | <td>Dry Swale with Check Dams</td> | ||
<td>5 acres or less</td> | <td>5 acres or less</td> | ||
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<td></td> | <td></td> | ||
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<td>Permeable Pavement</td> | <td>Permeable Pavement</td> | ||
<td>It is RECOMMENDED that external contributing drainage area not exceed the surface area of the permeable pavement. It is HIGHLY RECOMMENDED that external contributing drainage area not exceed twice the surface area of the permeable pavement</td> | <td>It is RECOMMENDED that external contributing drainage area not exceed the surface area of the permeable pavement. It is HIGHLY RECOMMENDED that external contributing drainage area not exceed twice the surface area of the permeable pavement</td> | ||
| − | <td>It is RECOMMENDED that external drainage area be as close to 100% impervious as possible. Field experience has shown that drainage area (pervious or impervious) can contribute particulates to the permeable pavement and lead to clogging. Therefore, sediment source control and/or | + | <td>It is RECOMMENDED that external drainage area be as close to 100% impervious as possible. Field experience has shown that drainage area (pervious or impervious) can contribute particulates to the permeable pavement and lead to clogging. Therefore, sediment source control and/or pretreatment should be used to control sediment run-on to the permeable pavement section.</td> |
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</tr> | </tr> | ||
<tr> | <tr> | ||
<td>Tree Trench/Tree Box</td> | <td>Tree Trench/Tree Box</td> | ||
<td>up to 0.25 acres per tree</td> | <td>up to 0.25 acres per tree</td> | ||
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<td></td> | <td></td> | ||
</tr> | </tr> | ||
</table> | </table> | ||
| − | <font size =1> | + | <font size =1>References: [https://swbmpvwrrc.wp.prod.es.cloud.vt.edu/wp-content/uploads/2017/11/BMP-Spec-No-8_INFILTRATION_v1-9_03012011.pdf Virginia], [https://deq.nc.gov/about/divisions/energy-mineral-land-resources/energy-mineral-land-permit-guidance/stormwater-bmp-manual North Carolina], [http://www.dep.wv.gov/WWE/Programs/stormwater/MS4/Pages/StormwaterManagementDesignandGuidanceManual.aspx West Virginia], [http://www.maine.gov/dep/land/stormwater/stormwaterbmps/ Maine], [http://tahoebmp.org/bmphandbook.aspx Lake Tahoe], [http://www.ct.gov/deep/cwp/view.asp?a=2721&q=325704 Connecticut], [http://www.mass.gov/eea/agencies/massdep/water/regulations/massachusetts-stormwater-handbook.html Massachusetts], [http://www.dec.ny.gov/chemical/29072.html New York], [https://dnr.wi.gov/topic/Stormwater/standards/postconst_standards.html Wisconsin], [http://dec.vermont.gov/sites/dec/files/wsm/stormwater/docs/Resources/sw_manual-vol1.pdf Vermont], [https://www.des.nh.gov/sites/g/files/ehbemt341/files/documents/2020-01/wd-08-20b.pdf New Hampshire], [https://www.ontario.ca/document/stormwater-management-planning-and-design-manual Ontario], [http://www.elibrary.dep.state.pa.us/dsweb/View/Collection-8305 Pennsylvania] |
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| − | [[ | + | <noinclude> |
| + | [[Category:Level 3 - General information, reference, tables, images, and archives/Tables/Infiltration basin, trench, underground infiltration]] | ||
| + | </noinclude> | ||
Latest revision as of 17:48, 4 August 2022
Stormwater infiltration BMPs - contributing drainage area
Link to this table
| Stormwater BMP | Recommended contributing area | Notes |
|---|---|---|
| Infiltration Basin | 50 acres or less | A natural or constructed impoundment that captures, temporarily stores and infiltrates the design volume of water into the surrounding naturally permeable soil over several days. In the case of a constructed basin, the impoundment is created by excavation or embankment. |
| Bioinfiltration Basin | 5 acres or less | Bioinfiltration basins must meet the required 48 hour drawdown time and must be sized in order to allow for adequate maintenance. It is HIGHLY RECOMMENDED that bioinfiltration basins be designed to prevent high levels of bounce as submerging vegetation may inhibit plant growth. A maximum wet storage depth of 1.5 feet is HIGHLY RECOMMENDED. |
| Infiltration Trench | 5 acres or less | |
| Dry Well Synonym: Infiltration Tube, French Drain, Soak‐Away Pits, Soak Holes | 1 acre or less (rooftop only) | |
| Underground Infiltration | 10 acres or less | Though feasible, larger underground infiltration systems may cause groundwater contamination as water is not able to infiltrate through a surface cover. In addition, wind flocculation, UV degradation, and bacterial degradation, which provide additional treatment in surface systems, do not occur in underground systems. Because performance research is lacking for larger features, it is HIGHLY RECOMMENDED that the contributing drainage area to a single device not exceed 10 acres. |
| Dry Swale with Check Dams | 5 acres or less | |
| Permeable Pavement | It is RECOMMENDED that external contributing drainage area not exceed the surface area of the permeable pavement. It is HIGHLY RECOMMENDED that external contributing drainage area not exceed twice the surface area of the permeable pavement | It is RECOMMENDED that external drainage area be as close to 100% impervious as possible. Field experience has shown that drainage area (pervious or impervious) can contribute particulates to the permeable pavement and lead to clogging. Therefore, sediment source control and/or pretreatment should be used to control sediment run-on to the permeable pavement section. |
| Tree Trench/Tree Box | up to 0.25 acres per tree |
References: Virginia, North Carolina, West Virginia, Maine, Lake Tahoe, Connecticut, Massachusetts, New York, Wisconsin, Vermont, New Hampshire, Ontario, Pennsylvania
This page was last edited on 4 August 2022, at 17:48.