Difference between revisions of "BMP selection based on physical feasibility"
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| − | + | <font size=3>'''This table shows guidance on BMP selection based on physical feasibility characteristics of a site.'''</font size><br> | |
| − | Link to this [[BMP selection based on physical feasibility|table]]. | + | Link to this [[BMP selection based on physical feasibility|table]]. |
<table class="sortable"><tr> | <table class="sortable"><tr> | ||
<th>BMP group</th> | <th>BMP group</th> | ||
| Line 14: | Line 14: | ||
<tr> | <tr> | ||
<td>Bioretention</td> | <td>Bioretention</td> | ||
| − | <td>7-10%; Minimum 200 ft | + | <td>7-10%; Minimum 200 ft<sup>2</sup></td> |
<td>5 acre maximum; 0.5-2.0 acre preferred</td> | <td>5 acre maximum; 0.5-2.0 acre preferred</td> | ||
<td>Any soil; use underdrain for C and D soils<sup>d</sup></td> | <td>Any soil; use underdrain for C and D soils<sup>d</sup></td> | ||
| − | <td> | + | <td></td> |
<td>3 feet</td> | <td>3 feet</td> | ||
<td>3 feet</td> | <td>3 feet</td> | ||
| Line 24: | Line 24: | ||
<tr> | <tr> | ||
<td>Filtration - media</td> | <td>Filtration - media</td> | ||
| − | <td> | + | <td>Negligible, except for access</td> |
<td>5 acre maximum; 0.5-2.0 acre preferred</td> | <td>5 acre maximum; 0.5-2.0 acre preferred</td> | ||
<td>Media part of design<sup>d</sup></td> | <td>Media part of design<sup>d</sup></td> | ||
| Line 45: | Line 45: | ||
<td>Varies based on depth</td> | <td>Varies based on depth</td> | ||
<td>5 to 10 acre maximum</td> | <td>5 to 10 acre maximum</td> | ||
| − | <td>Native soils with i>=0.2 inches/hour</td> | + | <td>Native soils with i >= 0.2 inches/hour</td> |
<td>2-12 feet</td> | <td>2-12 feet</td> | ||
<td>3 feet</td> | <td>3 feet</td> | ||
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<tr> | <tr> | ||
<td>Infiltration basin</td> | <td>Infiltration basin</td> | ||
| − | <td>Varies based on | + | <td>Varies based on depth</td> |
<td>5 to 50 acre maximum</td> | <td>5 to 50 acre maximum</td> | ||
| − | <td>Native soils with i>=0.2 inches/hour</td> | + | <td>Native soils with i >= 0.2 inches/hour</td> |
<td>2-12 feet</td> | <td>2-12 feet</td> | ||
<td>3 feet</td> | <td>3 feet</td> | ||
| Line 64: | Line 64: | ||
<td>Stormwater ponds</td> | <td>Stormwater ponds</td> | ||
<td>1-3%</td> | <td>1-3%</td> | ||
| − | <td>25 | + | <td>10 to 25 acres recommended<sup>b</sup></td> |
<td>A or B soils may require liner</td> | <td>A or B soils may require liner</td> | ||
<td>3-10 feet</td> | <td>3-10 feet</td> | ||
| Line 83: | Line 83: | ||
</table> | </table> | ||
<font size=1><sup>a</sup>Surface area as a function of contributing surface area, except for ponds and wetlands, where it is a function of entire drainage area<br> | <font size=1><sup>a</sup>Surface area as a function of contributing surface area, except for ponds and wetlands, where it is a function of entire drainage area<br> | ||
| − | <sup>b</sup>10 acres may be feasible if groundwater is intercepted and/or if water balance calculations indicate a wet pool can be sustained<br> | + | <sup>b</sup>10 acres or less may be feasible if groundwater is intercepted and/or if water balance calculations indicate a wet pool can be sustained<br> |
<sup>c</sup>Slope is defined as the slope across the proposed location of the practice<br> | <sup>c</sup>Slope is defined as the slope across the proposed location of the practice<br> | ||
<sup>d</sup>Infiltration gallery could be designed to provide limited recharge</font size> | <sup>d</sup>Infiltration gallery could be designed to provide limited recharge</font size> | ||
| − | [[ | + | |
| + | <noinclude> | ||
| + | [[Category:Level 3 - General information, reference, tables, images, and archives/Tables/General bmp information]] | ||
| + | </noinclude> | ||
Latest revision as of 20:03, 4 August 2022
This table shows guidance on BMP selection based on physical feasibility characteristics of a site.
Link to this table.
| BMP group | Surface areaa | Drainage area | Soil infiltration rate | Head | Separation from bedrock | Depth to seasonally high water table | Maximum slopec | Ultra-urban |
|---|---|---|---|---|---|---|---|---|
| Bioretention | 7-10%; Minimum 200 ft2 | 5 acre maximum; 0.5-2.0 acre preferred | Any soil; use underdrain for C and D soilsd | 3 feet | 3 feet | 20% | Yes | |
| Filtration - media | Negligible, except for access | 5 acre maximum; 0.5-2.0 acre preferred | Media part of designd | 2-6 feet | 0 feet if enclosed | 3 feet for vegetated; 0 feet if enclosed | 20% | Yes |
| Filtration - vegetative | Varies based on depth | 10 acre maximum | Media part of design | 2-6 feet | 0 feet if enclosed | 3 feet for vegetated; 0 feet if enclosed | 20% | Possible |
| Infiltration trench | Varies based on depth | 5 to 10 acre maximum | Native soils with i >= 0.2 inches/hour | 2-12 feet | 3 feet | 3 feet | 15% | Possible |
| Infiltration basin | Varies based on depth | 5 to 50 acre maximum | Native soils with i >= 0.2 inches/hour | 2-12 feet | 3 feet | 3 feet | 15% | No |
| Stormwater ponds | 1-3% | 10 to 25 acres recommendedb | A or B soils may require liner | 3-10 feet | 0 feet (shallow soil limits design) | 0 feet (except if hotspot or aquifer) | 25% | No |
| Constructed wetlands | 2-4% | 25 acre minimumb | A or B soils may require liner | 3-10 feet | 0 feet | 0 feet (except if hotspot or aquifer) | 25% | No |
aSurface area as a function of contributing surface area, except for ponds and wetlands, where it is a function of entire drainage area
b10 acres or less may be feasible if groundwater is intercepted and/or if water balance calculations indicate a wet pool can be sustained
cSlope is defined as the slope across the proposed location of the practice
dInfiltration gallery could be designed to provide limited recharge
This page was last edited on 4 August 2022, at 20:03.