Tidal artificial lake capable of inflow and outflow of seawater is planned for waterfront and eco-friendly
space at Songdo, Incheon, Korea. This study for hydrodynamic behaviors of tidal artificial lake was carried out and
predicted about water level and velocity within the lake corresponding to width of channel or waterway using by 1
dimensional numerical model(CEA) and 2 dimensional numerical model(FLOW2DH). As a result, the proper width,
100.0m of the channel between the lake and the open sea was calculated reasonable conclusions such as tidal phase
lag and maximum velocity from CEA. Also, water level and velocity of each point within the lake was predicted
and compared to the measured data from FLOW2DH. FLOW2DH was added to the gate control case for
maintenance and administration purpose of the lake and obtained the results that the velocity was decreased by
approximately 20% at flood and 50% at ebb than the case without gate control.