Abstract
The structure of the vertical circulations caused by the combined effect of the bottom oscillatory boundary layer (Stokes layer) and bottom inclination in on-offshore directions have been analyzed theoretically. In the first-order theory, the maximum amplitude of water surface appears at the shallowest water depth of the reflection boundary in coastal region, and the major axes of hodograph deflect towards shallower water region. The generating terms of residual current in tidal currents with different distributions have been discussed. It has turned out that second-order vertical circulations show 2-layer structure. The results obtained through the discussion may give useful suggestions to investigate the generating mechanism of the tide induced residual currents in the coastal region.
