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→Maintenance Considerations
Non-proprietary [[bioretention]] systems are sized as filters much more conservatively based on design storms, surface ponding depth and [[Flow through media|minimum media infiltration rate]]. The ratio of drainage area imperviousness to the surface area of bioretention facilities (referred to as the impervious-to-pervious ratio) is often many times lower than that for filtration MTDs. This ensures longer intervals for sediment maintenance and significant reductions in stormwater volumes through infiltration.
Non-proprietary [[bioretention]] systems are sized as filters much more conservatively based on design storms, surface ponding depth and [[Flow through media|minimum media infiltration rate]]. The ratio of drainage area imperviousness to the surface area of bioretention facilities (referred to as the impervious-to-pervious ratio) is often many times lower than that for filtration MTDs. This ensures longer intervals for sediment maintenance and significant reductions in stormwater volumes through infiltration.
==Maintenance Considerations==
==Maintenance considerations==
[[Inspections and maintenance#Practice-specific Inspection and Maintenance|Practice-specific maintenance guides]] are available for each LID BMP. General maintenance considerations for filter-based LIDs include:
[[Inspections and maintenance#Practice-specific Inspection and Maintenance|Practice-specific maintenance guides]] are available for each LID BMP. General maintenance considerations for filter-based LIDs include:
*'''Inspection and maintenance frequency''': Routine inspections and maintenance are needed to assess and resolve issues, such as [[Sedimentation|sediment]] buildup. [[Maintenance, Rehabilitation and Repair|Frequency of visits]] depends on a variety of factors. LID BMP designs should include safe access for maintenance and inspection crews and confined space entry procedures should be considered for subsurface systems.
*'''Inspection and maintenance frequency''': Routine inspections and maintenance are needed to assess and resolve issues, such as [[Sedimentation|sediment]] buildup. [[Maintenance, Rehabilitation and Repair|Frequency of visits]] depends on a variety of factors. LID BMP designs should include safe access for maintenance and inspection crews and confined space entry procedures should be considered for subsurface systems.