A Numerical Estimation on Extension of Marine Afforestation Area using Particle Tracking Method

Abstract: To arrange artificial reefs for marine afforestation effectivel y, tidal currents were analyzed by numerical experiments, and particle tracking b ased on tidal currents was carried out to clarify the path of algae spores. The experiments were conducted by the Environmental Fluid Dynamics Code (EFDC), and water column was vertically divided into five layers. Tidal current patterns were showed to be affected by main currents outside of the study area, and two circle currents were observed during the analysis of residual currents. Particle tracking lasted 15 days at three installation places where artificial reefs for marine afforestation could be deployed. According to the results of the particle tracking experiment, particle movements at the No.1 and No. 3 stations were belt types along the coastal line. The No. 2 station documented an ellipse type movement 300~500m from coast line. These results suggest that artificial reefs for marine afforestation should be installed in the belt zones at o f the No. 1 and No. 3 stations, and in the ellipse zone at the No. 2 station.