STORM SURGE MODEL IN WAVE-SHOALING REGION

摘要

This study proposed a storm surge prediction system in which the relation between wind stresses (wind field), whitecap breaker stresses (wave field) and bottom stresses (current field) is summarized. A storm surge prediction system in the extremely shallow water and/or shoaling region is proposed. The current enhancing effect due to whitecap dissipation of wind waves is considered in the system in terms of the whitecap shearing stress, τ_(br), which is an additional sea-surface shear stress for fluid motion caused by wind wave breaking.After the basic numerical experiments, the numerical system was applied to storm surge hind-cast in the Yastushiro Sea, Kumamoto, Japan in 1999, which was a typical case of storm surges in extremely shallow water.