Generation and Comparison of cross-shore profile changes considering bothof the sediment budget and sedimentary structures

利用医用X射线CT扫描仪对波浪作用下的海滩剖面变化、沉积结构和泥沙输移过程进行了动态测量。CT扫描仪沿着水槽自动移动，以测量海滩剖面和泥沙输移过程的跨岸演变。利用Hounsfield单位重建三维图像，研究了海滩形态的演变。由于医学X射线CT在波浪作用下泥沙输移过程的数据采集时间为1.0秒的优势，所获得的数据，如悬移质和推移质数据，对于阐明剖面变化的机制和验证数值模型是有用的。

A medical X-ray CT scanner was applied to dynamic measurements of beach profile changes,sedimentary structures, and sediment transport processes during wave actions in thelaboratory experiments. In order to measure the cross-shore evolutions both of beachprofiles and sediment transport process, the CT-scanner moves automatically along theflume. By reconstructing three-dimensional images using Hounsfield units, the evolutionof beach morphology was examined. Because medical X-ray computed tomography has theadvantage of a data acquisition time of 1.0 seconds for sediment transport processesduring wave action, the obtained data, such as that of the suspended and bed load, areuseful for clarifying the mechanism of profile change and validating numerical models.