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Jackson Laboratory Tree Box Filter
Tree box filters are mini bioretention areas that can be very effective at controlling runoff. Runoff is directed to the tree box, where it is cleaned by vegetation and soil before entering a catch basin. The runoff collected in the tree-boxes helps irrigate the trees, shrubs, or other plants in the tree box. .
The system consists of a container filled with a soil mixture, a mulch layer, under-drain system and a shrub or tree. Stormwater runoff drains directly from impervious surfaces through a filter media (soil and vegetation). Treated water flows out of the system through an under drain connected to a storm drainpipe or into the surrounding soil.
Tree box filters are based on “bioretention or rain garden” technology with improvements to enhance pollutant removal, increase performance reliability, increase ease of construction, reduce maintenance costs and improve aesthetics. Native landscape plants (shrubs, ornamental grasses, trees and flowers) are used as an integral part of the bioretention / filtration system.
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