Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)
Online ISSN : 1883-8944
Print ISSN : 1884-2399
ISSN-L : 1883-8944
Paper (In Japanese)
Relationships between beach profile changes and sediment density distributions under wave actions using medical X-ray CT scanner
Fumihiko YAMADASeiya SUENAGAGozo TUJIMOTOHajime SHIROUZUSota NAKAJOTakaomi HOKAMURABernard LONGConstant PILOTE
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2013 Volume 69 Issue 2 Pages I_561-I_565

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Abstract

A medical X-ray computed tomography (CT) scanner was applied to dynamic measurements of beach profile changes, internal sediment structures, and sediment transport processes during wave actions in the laboratory experiments. An acrylic flume 7 m long and with an inner rectangular cross-section of 0.3 m × 0.3 m passes through the mobile gantry of a medical X-ray CT-scanner. Reconstructing three-dimensional images using Hounsfield Units (HU), the relationships between beach profile changes and sediment density distributions within the depth of disturbance (DOD) are examined. The DOD is located within 9 mm below the bottom surface and sixty times larger than mean sand diameter (d50). A negative correlation is found to be existed between them.

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© 2013 by Japan Society of Civil Engineers
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