N-Line Model due to Beach Nourishment using 2D Advection Diffusion Equation

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  • 養浜土砂の移流拡散を考慮した等深線変化予測モデルに関する研究
  • ヨウヒン ドシャ ノ イリュウ カクサン オ コウリョ シタ トウシンセン ヘンカ ヨソク モデル ニ カンスル ケンキュウ

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This study is concerned with a N-line model that takes into account contour line changes after beach nourishments. The behavior of the sand materials after beach nourishments is represented using two-dimensional advection diffusion equation in the horizontal plane. The effect of grain size of the nourished sand was considered in the advection diffusion equation. The contour line changes were calculated solving the fundamental equation for the conservation of bedmaterial, which adapts the effect of the advection diffusion equation. Firstly, model tests were carried out in orderto investigate the influence of grain size. The effect of grain size for beach nourishment was investigated. Secondly, the model was applied to preservation of eroded beach using a sand recycle method measures, and then the applicability was discussed.

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