Study of Tidal Residual Currrent in Pozm Bay with Numerical Modeling

Three forcing processes can provide residual current: Tidal forces, wind forces, and density differences. Tidal residual current are created by tidal wave interaction with the structure of topography. In this study, two-dimensional model VOM-SW2d is applied In the barotropic and fully nonlinear to Pozm Bay in the northern coast of Oman to simulate the tidal residual currents. In this study aimed to investigate the effects of substrate unevenness, removed topography slope using high-pass filter. Regular computational grid has been used with a resolution of 150 m, in direction x and y. The results obtain the maximum current velocity of 0.05 m/s near the mouth of the Gulf of Pozm. Tidal residual current was observed of topographic features near the headland of Pozm Bay, headland at Pozm Bay and also in coastal areas due to the slope of the coast. Also the model results shows several eddies in different sizes and some Circulation in various scales. Tidal residual currents in the Pozm Bay, as depicted by Lagrangian trajectories reveal a stationary flow whit several eddies. Each eddy can be identified with a topographic obstacle. This confirms that the tidal residual flow field is strongly influenced by the nonlinear interaction of the tidal wave with the bottom relief which, in turn, is deformed by figure hills and valleys beneath the seabed