抄録
Geophysical upwelling is a important marine physical movement for creating a fishing zone. When current
along coast encounters cape, its current makes a boundary layer developed along the cape. Vortices are generated
in the boundary layer and separate at the tip of the cape. These separated vortices make its diameter enlarged
and vanish. Geophysical upwelling is generated in this process at the same time. In this paper, it is theorized that
the boundary layer thickness is proportional to the cape length and inverse proportional to the Strauhal number
of vortices. While, it is theorized that this thickness is proportional to the vortex diameter and inverse proportional
to the progressing time of the enlargement of the vortex diameter. The separate periods of vortices and the
diameter after separation were measured in the hydraulic model and in site photograph. It was showed that two
theories were agreed well.
