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<center><font size=3>'''Guidance on BMP selection based on physical feasibility characteristics of a site.'''</font size><br>
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<center><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]].</center>
 
Link to this [[BMP selection based on physical feasibility|table]].</center>
 
<table class="sortable"><tr>
 
<table class="sortable"><tr>
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<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>
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[[category:table]]

Revision as of 16:39, 14 February 2013

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 ftb2 5 acre maximum; 0.5-2.0 acre preferred Any soil; use underdrain for C and D soilsd 4-6 feet 3 feet 3 feet 20%Yes
Filtration - media Neglibible, except for access 5 acre maximum; 0.5-2.0 acre preferred Media part of designd 2-6 feet0 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 dept 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% 25 acre minimumb 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 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