A Numerical Landslide-Tsunami Hazard Assessment Technique Applied on Hypothetical Scenarios at Es Vedrà, Offshore Ibiza

A numerical landslide-tsunami hazard assessment technique demonstrates that tsunamis generated by hypothetical landslides at Es Vedrà, offshore Ibiza, decay rapidly with distance. Simulations show that while a 133-meter-high tsunami could reach 14.2 meters offshore Cala d’Hort (3 km away), its maximum run-up height would exceed 21.5 meters. In contrast, the wave height and inundation depth at Marina de Formentera (23 km away) are significantly smaller, at 2.7 meters and 1.2 meters, respectively. The study employs a hybrid modeling approach combining smoothed particle hydrodynamics for violent wave generation with SWASH for less computationally intensive offshore simulations, incorporating bottom friction and frequency dispersion. This technique supports site-specific landslide-tsunami hazard assessments, offering a framework for future investigations of real-world cases.

Tan, H., Ruffini, G., Heller, V., & Chen, S. (2018). A Numerical Landslide-Tsunami Hazard Assessment Technique Applied on Hypothetical Scenarios at Es Vedrà, Offshore Ibiza. Journal of Marine Science and Engineering, 6(4), 111. https://doi.org/10.3390/jmse6040111