New Zealand plant growth trials in rapid biofiltration media.

TitleNew Zealand plant growth trials in rapid biofiltration media.
Publication TypeConference Paper
Year of Publication2017
AuthorsCheah, J., Brockbank T., Simcock R., & Hannah M.
Conference Name14th International Conference on Urban Drainage
Date Published09/2017
PublisherJoint Committee on Urban Drainage (JCUD)
Conference LocationPrague
Keywordsbiomass, Bioretention, hydraulic conductivity, plant establishment, plant trial, rapid biofiltration media

Media used in rapid bio-filtration devices have hydraulic conductivity rates exceeding 2500 mm/hr. Stormwater360 New Zealand has partnered with Contech USA to produce a rapid filtration media using locally available materials. Current bio-retention guidance limits the hydraulic conductivity of media to less than 350 mm/hr to support plant growth. Using a short-term plant trial (3 months) and 4 long-term ongoing plant trials (11 months+) plant growth was assessed. In total 87 plants were grown (comprising of 28 different tree, shrub and grass species). Out of the plants grown, 81 plants (93%) and 25 plant species (89%) successfully established and grew in rapid filtration media.