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Numerical modeling and sensitivity analysis of landslide tsunami: Lituya Bay and La Palma

Numerical modeling and sensitivity analysis of landslide tsunami: Lituya Bay and La Palma. Josh Taron. The Setting: Lituya Bay. Miller, 1960. The Stage: Gilbert Inlet. Modified from Fritz et al., 2001. The Numerical Recipe: Level-Set. Indicator Functions and Smooth Heaviside

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Numerical modeling and sensitivity analysis of landslide tsunami: Lituya Bay and La Palma

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  1. Numerical modeling and sensitivity analysis of landslide tsunami: Lituya Bay and La Palma Josh Taron

  2. The Setting: Lituya Bay Miller, 1960

  3. The Stage: Gilbert Inlet Modified from Fritz et al., 2001

  4. The Numerical Recipe: Level-Set • Indicator Functions and Smooth Heaviside • Demarcating Physical Properties • Dimensionless Navier-Stokes • Advection-Diffusion of Indicators

  5. Numerical Recipe: Landslide • FEMLAB’s Full Stress Tensor • Iverson et al (1985)

  6. No slip boundaries with bulk density 1610 kg/m3 Slip boundary - same conditions

  7. Validation Newmark, 1965 Dynamic FOS Maximum Velocity • Maximum Landslide Velocity • Wave Height Noda, 1970 Slingerland et al., 1979 a = -1.25 b=0.71 Slide path length = 358m, slide height, h, = 90m

  8. Parametric Analysis

  9. References • Iverson, R., 1985. A constitutive equation for mass movement behavior. Journal of Geology, 93: 143-160. • Miller, D.J., 1960. A timely account of the nature and possible causes of certain giant waves, with eyewitness reports of their destructive capacity, Geological survey professional paper 354-C, U.S. Department of the Interior, Washington. • Fritz, H.M., Hager, W. H., and Minor, H. -E., 2001. Lituya Bay case: Rockslide impact and wave run-up. Science of Tsunami Hazards, 19(1): 3-22. • Newmark, N.M., 1965. Effects of earthquakes on dams and embankments. Geotechnique, 15(2): 139-160. • Noda, E., 1970. Water waves generated by landslides: Proceedings of the American Society of Civil Engineers. Journal Waterways Harbors Div, 96(4): 835-855. • Slingerland, R.L., and Voight, B., 1979. Occurences, properties, and predictive models of landslide-generated water waves. In: Developments in Geotechnical Engineering 14B: Rockslides and Avalanches, 2, Engineering Sites., Voight, B., ed.(Elsevier Scientific Publishing Company): 317-397.

  10. Thanks To be continued with La Palma…

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