Abstract
Relationship between drowning accidents and development of a rip current around a headland was investigated, taking the Chigasaki coast in Kanagawa Prefecture as an example. On this coast, a headland of 200m length was built. After the construction, swimmers and surfers were carried away by a rip current near the headland, causing marine accidents. Numerical simulation of waves and nearshore currents was carried out to obtain maximum velocity of a rip current, while changing the longshore and offshore lengths of the headland. Most dangerous condition with developing a strong rip current is found in relation to the scale of a headland and wave characteristics.
