2022 Volume 78 Issue 2 Pages I_115-I_120
The 3D topographic measurement system was constructed to measure a gravel beach during a hydraulic model experiment. It was possible to create a DSM and an ortho-mosaic of the gravel beach using the SfM/MVS technology applied to multiple images taken simultaneously. Furthermore, the influence of wave-dissipating blocks placed on the gravel beach on the topographic change was investigated using the constructed measurement method. The results indicate that the placement of wave-dissipating blocks on the beach increases the time required for the topography to reach equilibrium, and that the gravel may be deposited more landward. The usefulness of the 3D topography measurement system was confirmed for measuring the 3D topographic changes that occur in hydraulic model experiments.
