大阪湾の潮流に関する水理模型実験(3)

Abstract

Residual currents are known to be responsible for the transport of mass, pollution and sediment, despite their magnitudes are small relative to those of tidal currents.The residual currents in the previous research have been obtained by averaging temporal variation of velocity at a fixed point. To study the transport processes, however, handling the phenomena from Lagrangian viewpoint is necessary.Many factors like tide, wind and density are related to residual currents. In case of Osaka Bay, additionally, the existence of currents running toward the east in the Seto island sea (the constant flow) is pointed out in the previous studies, and the currents has influence on transport processes.This paper shows some experimental results, which take the constant flow into account, of the residual currents in Osaka Bay using a hydraulic model test and a tracer method.