SIHWA Lake Tidal Power Plant in South Korea is the largest tidal power installation in the world, with the total power output capacity of 254MW.
In this study, we established fine grid numerical simulation that can fully consider the physical conditions in the SIHWA sea area and the discharge characteristics. And we calculated current field to find causes of increase in flow velocity in accordance with discharge conditions. Lastly, we reproduced these complicated phenomenons and examined generated flow velocity through three-dimensional hydraulic model test, and found countermeasures to reduce flow velocity. Lastly, we examined the stability of countermeasures simultaneously.