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Typical stationary waves are caused by overlapped the incident and reflected wave, when the plane wave vertically meets a line structure. In this case characteristic sediment flow behavior is observed and seabed is suffered from configuration change such as erosion and deposition. In more general situations where plane wave meets line structures in diagonal direction, however, overlapped waves would behave in three-dimensional manner. The stability of structures subjected to stormy ocean waves or tsunami depends on the integrity of seabed foundation ground, as well as the wave pressure acting directly on the structures. Thus, reliable analysis method for evaluating the sediment flow on seabed and associated erosion-deposition is needed. The present study aims to clarify the sediment flow characteristics induced by the diagonal incident and reflected waves which meet line structure and broken line structure, with seabed effective stress response to sea wave loading into account. Erosion-deposition behavior was quantitatively examined based on the calculated results.

SEDIMENT FLOW CHARACTERISTICS ON SEABED SUBJECTED TO STATIONARY WAVES WITH DIAGONAL INCIDENT WAVE LOADING NEAR LINE STRUCTURES