EXPERIMENTAL STUDY ABOUT A BEACH SECTION TO BE FORMED OF A PLURAL EROSION TYPE WAVES

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  • IZU Tomoki
    金沢工業大学大学院 工学研究科 環境土木工学専攻
  • ARITA Mamoru
    金沢工業大学 環境・建築学部 環境土木工学科

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  • 侵食型波浪の組み合わせによって形成される二次元砂州断面に関する実験的研究
  • シンショクガタ ハロウ ノ クミアワセ ニ ヨッテ ケイセイ サレル ニジゲン サス ダンメン ニ カンスル ジッケンテキ ケンキュウ

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Abstract

 In this study, We inspected whether the multiple longshore bar is formed by the combination of three kinds of different erosion type waves of the breaking position experimentally. When the wave acted in low order of the wave height, the bar which was formed of a low wave of the wave height was disappeared by the action of a high wave of the wave height, and became the equilibrium beach section which existing only the bar which was formed of the high wave of the wave height. In contrast, when the wave acted in high order of the wave height, the traction excelled in the offing side of the breaking position, and the bar which was formed of the high wave of the wave height was disappeared by the action of the wave which was lower than it. Therefore, in the experiment using the rule wave in beach incline 1/15, when it acted by the different erosion type wave of the breaking position, the equilibrium beach section of one step of the bar was formed by the wave which acted finally. From this, it is thought that it is difficult for the multiple longshore bar to form it by the combination of waves under this experiment condition.

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