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Inspection and Maintenance: Bioretention & Bioswales (view source)
Revision as of 18:07, 7 April 2022
, 2 years agono edit summary
*'''[[Stormwater Tree Trenches|Biofilter]]''': Bioretention cell or swale with an impermeable liner or containment structure and sub-drain.
*'''[[Stormwater Tree Trenches|Biofilter]]''': Bioretention cell or swale with an impermeable liner or containment structure and sub-drain.
*'''[[Dry swale]] or [[Bioswale|Bioretention swale]]''': A gently sloping, linear oriented bioretention practice designed to be capable of conveying water across an elevation gradient. Also known as a bioswale or dry swale.
*'''[[Dry swale]] or [[Bioswale|Bioretention swale]]''': A gently sloping, linear oriented bioretention practice designed to be capable of conveying water across an elevation gradient. Also known as a bioswale or dry swale.
==How to Preserve Basic BMP Function==
*Maintain grading of the filter bed (or [[Vegetated filter strips|grass filter strip]] if present) at [[curb cut]] [[inlets]] so at least 5 cm of the back of the curb is visible through regular sediment removal and regrading.
*To avoid over-compaction of the [[Bioretention: Filter media|filter media soil]], any maintenance tasks involving vehicle or foot traffic on the filter bed should not be performed during wet weather.
*For bioretention with sod (i.e., [[Turf|turf grass]]) as [[vegetation]] cover, maintain with a push mower or the lightest mulching ride mower available and core aerate and dethatch annually in the spring to help maintain permeability.
*Pruning of mature [[trees]] should be performed under the guidance of a Certified Arborist.
*Woody [[vegetation]] should not be planted or allowed to become established where snow will be piled/stored during [[Winter]].
*Removal of sediment from the filter bed surface should be done with rake and shovel, or vacuum equipment to minimize plant disturbance. If a small excavator is to be used, keep it off the BMP footprint to avoid damage to side slopes/embankments and over-compaction of the [[filter media]].
==References==