Diffusion and Sinking of Organic Matter Load of Silver Salmon Farming in Miho Bay

Abstract

MEC ocean model was coupled with submodels of fish cage drag and aquaculture waste organic matter load to investigate the diffusion and sinking characteristics of residual food and fish fecal matter of silver salmon farming in Miho bay. The results showed that the fish cage had an influence on the current flow. We also predicted the diffusion and flux of residual food and fish fecal matter, and obtained the relationship between the flux of residual food and fish fecal matter directly below the fish cage, water depth, and current velocity. In the future, the benthic model should be improved to evaluate the sediment environment.