The Sudokwon Landfill in Korea has one of the longest leachate channel in the world but the channel is disturbed and has lost most of its purpose for remediation. Therefore, ecological monitoring and management of the leachate channel is required for sustainable management.

5 common wetland species were selected for candidates of remediation plant. Their growth, biomass and element contents were investigated for evaluation. Then, two selected species (Phragmites australis and Typha angustifolia) were grown in different water depth to study their ability of growing and accumulating in different water depth. Typha angustifolia showed better performance in deep water, which would take advantage in actual leachate channel (Which became much deeper than original design).

Since most plants in the leachate channel is not harvested and gives accumulated toxic materials back to the channel by decomposition, using Azolla japonica species for alternative phytoaccumuating plant were tested. Azolla japonica species showed fabulous potentials as a remediation plant. And as the species is a N-fixing plant, Azolla japonica showed excellent performance in post-harvest use as a fertilizing material. By these researches, sustainable management of the leachate channel could be practiced.