PROPOSAL FOR A STORM SURGE AND HIGH WAVE INUNDATION ANALYSIS METHOD INCORPORATING A SIMPLIFIED ESTIMATION METHOD FOR INCIDENT WAVE DIRECTION OF HARBOR WAVES

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  • 港内波浪の入射波向の簡易推定法を組込んだ高潮・高波浸水解析法の提案

Abstract

<p> In order to identify inundation risks due to storm surge and high waves, and to plan disaster prevention and mitigation measures, it is desirable to utilize storm surge and high wave inundation analysis. However, the increase in computational cost of analyzing the wave field, including the wave direction in the vicinity of the port, is a practical challenge. The purpose of this study is to propose a storm surge and high wave inundation analysis method that reproduces the inundation traces by combining a low computational cost wave calculation method targeting Shimizu Port, which was affected by Typhoon No. 19 in 2019. The study also aims to clarify the influence of wave direction in inundation analysis. It was confirmed that a simplified estimation method for wave direction by the line of sight angle, approximately reproduces the incident wave direction calculated by the Boussinesq model. In addition, when considering the wave direction based on the line of sight angle in the storm surge and high wave inundation analysis, it was confirmed that the vector division method reproduces the range of inundation traces most accurately. The proposed method provides useful insights for practical storm surge and high wave inundation analysis.</p>

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