Ian Corne, CPESC, M.Land.Arch., B.E.S., Nilex Erosion & Sediment Control Application Specialist
Canadian Dam Association Conference & Exhibition, Oct. 14-19, 2017, Kelowna, B.C.
This Case Study illustrates twenty years’ service of geosynthetically reinforced turf as the surface armouring of a failsafe at the Assiniboine River Diversion, northwest of Portage la Prairie, Manitoba, Canada. This paper’s performance observations are augmented with discussion on quantifying ‘Green Infrastructure’ principles as well as discussion on the potential for reinforced turf to perform more dependably than rock riprap that is routinely undermined by low flow events.
Once considered innovative technology, Turf and Root Reinforcement Mats (TRMs) have become ‘State of Practice’ in armouring civil hydraulic structures. Reinforced turf solutions are becoming increasingly more commonplace, especially where rock riprap may otherwise have been specified. New innovation in TRM technology comes with quantifying the reduction of carbon footprint of construction when utilizing TRM armouring as compared to traditional rock riprap armouring. Future innovation will come in quantifying carbon sequestration of vegetated structures when compared to hard armoured structures.