Internal sediment density structures around bars and troughs due to beach deformations using X-ray CT

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  • X線CTを用いた地形変化に伴うバー・トラフ付近の底質内部の密度構造の検討
  • Xセン CT オ モチイタ チケイ ヘンカ ニ トモナウ バー トラフ フキン ノ テイシツ ナイブ ノ ミツド コウゾウ ノ ケントウ

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Abstract

X-ray Computed Tomography (CT) has been applied to investigate a time-space evolutions of sediment density profile due to beach profile changes in the laboratory wave flume conditions. The sediment density and pore profiles in the collecting sediment cores were measured using X-ray CT scanning. The sediment density profiles in the erosional conditions are different from these of deposional conditions. The depth of disturbance was found to be few centimeter orders of magnitude. Reconstructing three-dimensional images using CT value, the evolutions of low bulk density region and porosity structure were examined.

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