医療用X線CTを用いた波作用下の地形変化・底質輸送の同時連続計測

抄録

Medical X-ray CT scanner was applied to dynamic measurements of beach profile changes and sediment transport during wave actions. Reconstructing three-dimensional images using Hounsfield Units (HU), the evolutions of beach morphology were examined. Both of Rouse and exponential profiles of time-averaged sediment concentrations are not good skill to show the measured profile of sediment concentrations using X-ray CT. The profile of eddy diffusivity was estimated using the 1D diffusion equation for steady state and measured CT results. Estimated profile of eddy diffusivity in the surf zone was good agreement with the model proposed by Christoffersen.Jonsson (1985).