Abstract
Mean water level around the rip channel in Uradome Beach in Tottori was measured by the stereo image analysis of the two video images. It is found that the mean sea level along the rip current was slightly higher than those in the region along each side of the rip current. A series of numerical simulations of wave-induced currents and mean sea levels were also carried out on the bottom profile measured at Uradome Beach. The numerical results show that rip current come up through the place where the wave height is low that just corresponds to the place where the mean water level is higher than the surrounding region.
