FIELD SURVEY AND MECHANISM OF STORM SURGE GENERATION INVOKED BY THE LOW PRESSURE WITH RAPID DEVELOPMENT IN NEMURO HOKKAIDO IN DECEMBER 2014

Abstract

 The low pressure with rapid development generated storm surge and inundation over a port and city in Nemuro. The aims of this paper are to provide the information of storm surge height measured by the authors and to clarify the generation mechanism of the storm surge. Based on the authors' field survey, the maximum storm surge height at the street and the port in Nemuro was approximately 2.20 m and 2.80 m, respectively. Furthermore, the ground level in Nemuro decreased from coastal line toward the street. According to the numerical results with WRF and FVCOM, the water level in Nemuro bay increased at first because of the East wind. Then, the mass of water intrudes to the Nemuro Peninsula because of north wind and caused the storm surge. In conclusion, the local topography of Nemuro, the direction changes of wind and the topography of Nemuro Peninsula caused the damage of the storm surge to Nemuro.