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Inspection and Maintenance: Bioretention & Bioswales (view source)
Revision as of 19:31, 7 April 2022
, 2 years agono edit summary
*Woody [[vegetation]] should not be planted or allowed to become established where snow will be piled/stored during [[Winter]].
*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]].
*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]].
==Key Components & I&M Tasks==
==Key Components and I&M Tasks==
{|class="wikitable"
|+ '''
=== Key Components, Descriptions and Routine Inspection and Maintenance Tasks ===
'''
|-
!Component
!Description
!Inspection & Maintenance Tasks
|-
|'''[[Bioretention: Sizing|Contributing Drainage Area (CDA)]]'''
|
Area(s) from which runoff directed to the BMP originates; includes both impervious and pervious areas.
|
*Remove trash, debris and sediment from pavements (biannually to quarterly) and eavestroughs (annually);
*Replant or seed bare soil areas as needed.
|-
|'''[[Pretreatment]]'''
|
Devices or features that retain trash, debris and sediment; help to extend the [[Cost analysis resources|operating life cycle]]; examples are eavestrough screens, [[Pretreatment|catch basin]] inserts and sumps, [[oil and grit separators]], [[inlets|geotextile-lined inlets]], [[Gravel diaphragms|gravel trenches]], [[Vegetated filter strips|grass filter strips]] and [[forebays]].
|
*Remove trash, debris and sediment annually to biannually or when the device sump is half full;
*Measure sediment depth or volume during each cleaning, or annually to estimate accumulation rate and optimize frequency of maintenance
|-
|'''[[Inlets]]'''
|
Structures that deliver water to the BMP (e.g., curb-cuts, spillways, pavement edges, catchbasins, pipes).
|
*Keep free of obstructions;
*Remove trash, debris and sediment biannually to quarterly;
*Measure sediment depth or volume during each cleaning or annually to estimate accumulation rate and optimize frequency of maintenance;
*Remove woody [[vegetation]] from filter bed at [[inlets]] annually.
==References==
==References==