Nutrient Mitigation and Fishery Enhancement With Floating Treatment Wetlands
FTW-enhanced fishing and other biomass harvesting can be the primary method for transitioning excess nutrients from water, according to a recent study. Critical FTW factors in transforming a eutrophic pond (Fish Fry Lake in Montana) to a productive fishery included improved water clarity, higher dissolved oxygen concentrations, lower water temperatures, more fish cover and an increased food source (biofilm/periphyton).
These findings are being explored at a larger scale in 2013. Studies include: 1) a brush park at Fish Fry Lake, 2) a one-acre FTW installed for nutrient abatement in New Zealand, 3) large quantities of FTWs and aeration equipment proposed for the lower Susquehanna River (maximizing nutrient reduction by transitioning them into fish), and 4) a research study in Mississippi using FTWs with active circulation to improve water quality and fish habitat.