RT Journal Article
T1 The Lituya Bay landslide-generated mega-tsunami – numerical simulation and sensitivity analysis
A1 González-Vida, José Manuel
A1 Macías-Sánchez, Jorge
A1 Castro-Díaz, Manuel Jesús
A1 Sánchez-Linares, Carlos
A1 de la Asunción, Marc
A1 Ortega-Acosta, Sergio
A1 Arcas, Diego
K1 Maremotos
AB The 1958 Lituya Bay landslide-generated mega- tsunami is simulated using the Landslide-HySEA model, a recently developed finite-volume Savage–Hutter shallow wa- ter coupled numerical model. Two factors are crucial if the main objective of the numerical simulation is to reproduce the maximal run-up with an accurate simulation of the in- undated area and a precise recreation of the known trimline of the 1958 mega-tsunami of Lituya Bay: first, the accu- rate reconstruction of the initial slide and then the choice of a suitable coupled landslide–fluid model able to reproduce how the energy released by the landslide is transmitted to the water and then propagated. Given the numerical model, the choice of parameters appears to be a point of major im- portance, which leads us to perform a sensitivity analysis. Based on public domain topo-bathymetric data, and on in- formation extracted from the work of Miller (1960), an ap- proximation of Gilbert Inlet topo-bathymetry was set up and used for the numerical simulation of the mega-event. Once optimal model parameters were set, comparisons with ob- servational data were performed in order to validate the nu- merical results. In the present work, we demonstrate that a shallow water type of model is able to accurately reproduce such an extreme event as the Lituya Bay mega-tsunami. The resulting numerical simulation is one of the first successful attempts (if not the first) at numerically reproducing, in de- tail, the main features of this event in a realistic 3-D basin geometry, where no smoothing or other stabilizing factors in the bathymetric data are applied.
PB Copernicus Publication
YR 2019
FD 2019-02-15
LK https://hdl.handle.net/10630/32901
UL https://hdl.handle.net/10630/32901
LA eng
NO González-Vida, J. M., Macías, J., Castro, M. J., Sánchez-Linares, C., de la Asunción, M., Ortega-Acosta, S., and Arcas, D.: The Lituya Bay landslide-generated mega-tsunami – numerical simulation and sensitivity analysis, Nat. Hazards Earth Syst. Sci., 19, 369–388, https://doi.org/10.5194/nhess-19-369-2019, 2019.
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 1 mar 2026