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滩涂剖面变化、沉积构造和泥沙运动过程进行了动态测量。为了测量滩涂剖面和泥沙输移过程的跨岸演变，CT扫描仪自动沿水槽移动。通过使用Hounsfield单元重建三维图像，考察了海滩地貌的演变。由于医用X射线计算机层析成像对波浪作用下泥沙运动过程的数据采集时间为1.0s，所获得的悬沙和推移质等数据有助于阐明剖面变化的机理和验证数值模型。

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.