Investigation of Wave Set-up and Tidal Discharge due to Winter Storm Waves at the Sea of Japan side River Mouth

Abstract

At the Sea of Japan side river mouth, frequent occurrence of water level rise caused by wave set-up during winter. From this reason, saline water intrusion is generated at the tidal area due to wave set-up. There is a possibility that saline water run up the upstream. Hence, river environment was received a great amount of influence from saline water intrusion. However, it was not understood in sufficient elucidation of the mechanism of the increase of tidal discharge by wave set-up. In this study, the tidal discharge caused by wave set-up is estimated from measured water level variation at the Koyoshi and Yoneshiro river mouths and river width change was investigated by photographic analysis at the river mouth