Image-based analysis for spatial variations and sediment density structures of Intertidal Multiple Sand Bars

概要

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Long-term morphological changes of intertidal multiple sand bars are examined using the aerial photographs during 1942 to 2008. Short-term morphological changes of intertidal multiple sand bars also investigated using video image analysis during June to December 2010. Video analysis results are compared with the 3D laser measurements using unmanned helicopter. Although horizontal bar morphology change to some extent under energetic wave motions, their morphology appears to be a permanent feature in both form and position. Sampling the sediment cores in the field, the sediment density and pore profile changes due to one-dimensional (vertical) water pressure are examined using X-ray-CT scanner. The density shows slightly changes during the experiments, however, the pore ratio is less than 0.02.
Japan Society of Civil Engineersの論文