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<center><font size=3>Structural BMP use in Karst settings.</font size><br>
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<center><font size=3>'''Structural BMP use in Karst settings.'''</font size><br>
 
Link to this [[Structural BMP use in karst settings|table]]</center>
 
Link to this [[Structural BMP use in karst settings|table]]</center>
 
<table class="sortable">
 
<table class="sortable">

Revision as of 17:27, 4 January 2013

Structural BMP use in Karst settings.
Link to this table
BMP Karst considerations
Bioretention If containment levels remain high after treatment or if water inflow presents a threat, an underdrain and-or use of a synthetic or other impermeable membrane liner should be considered to seal the bottom of the system.
Media filter If containment levels remain high after treatment or if water inflow presents a threat, an underdrain and-or use of a synthetic or other impermeable membrane liner should be considered to seal the bottom of the system.
Vegetative filter
  • Avoid water ponding
  • Should be engineered to avoid channel erosion and optimize pollutant removal
Infiltration trench or basin
  • Not typically recommended in active karst areas due to sinkhole formation and inadequate treatment by a scarcity of underlying soils
  • If used, should have supporting geotechnical investigations and calculations
  • Pre-treatment should be extensive to limit risk of groundwater contamination
  • Local review authority should be consulted for approval
Stormwater ponds
  • Should be constructed with a synthetic or clay liner in active karst areas
  • Should have supporting geotechnical investigations and calculations
  • Should be limited to a maximum ponding depth (e.g. < 10 feet)
Constructed wetlands
  • Should be constructed with a synthetic or clay liner in active karst areas
  • Should have supporting geotechnical investigations and calculations
  • Should be limited to a maximum ponding depth (e.g. < 10 feet)