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Abstract:
Since tsunamis generated by submarine and subaerial landslides occur less frequently than tsunamis generated by fault movement, the actual behavior of landslide tsunamis is not well understood. Experimental and analytical studies have been conducted on submarine and subaerial landslide tsunamis, but there are fewer research examples than tsunamis generated by fault movement. In addition, experiments using two-dimensional flume have been mainly conducted, and there are few examples of examinations of submarine and subaerial landslide tsunamis under the same conditions. In this study, granular and solid slide models were used as models of landslide bodies, and hydraulic model experiments of submarine and subaerial landslide tsunamis were conducted by three-dimensional landslides. The 12.0m long, 12.0m wide, and 1.5m high experimental water tank was constructed, and landslide models were installed on the top of the slope. As the shape of the landslide model, three kinds of solid slide models were used as non-deformable landslide bodies, and granular bodies were used as deformable landslide bodies. We investigated the tsunami water level generated by the difference between granular material and solid slide model, and the difference between submarine and subaerial landslides, and its propagation process. The experimental data obtained in this study are useful for verification of the landslide tsunami numerical simulation model.
