Field Observations From a Massive Landslide Tsunami in Taan Fjord, Wrangell St. Elias National Park, Ak

Bloom, Colin; MacInnes, Breanyn; Higman, Bretwood; Stark, C. P.; Lynett, Patrick; Ekström, Göran; Willis, M. J.; Shugar, Dan H.

doi:10.1130/abs/2016am-285078

Cited by 3 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, they are, on some occasions, extremely destructive as they form near the coast or in the same coastline if they are aerial. Sometimes landslides may generate so-called megatsunamis, which are characterized by localized extreme runup heights (Lituya Bay, 1958, Miller, 1960Fritz et al, 2009;1934Tafjord event, Norway, Jørstad, 1968Harbitz et al, 1993, Taan Fjord, 17 October 2015, Bloom et al, 2016Higman et al, 2018; or the very recent event of Sulawesi, 29 September 2018, among many others).…”

Section: Introductionmentioning

confidence: 99%

The Lituya Bay landslide-generated mega-tsunami – numerical simulation and sensitivity analysis

González‐Vida

Macías

Castro

et al. 2019

Nat. Hazards Earth Syst. Sci.

View full text Add to dashboard Cite

Abstract. The 1958 Lituya Bay landslide-generated mega-tsunami is simulated using the Landslide-HySEA model, a recently developed finite-volume Savage–Hutter shallow water 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 inundated area and a precise recreation of the known trimline of the 1958 mega-tsunami of Lituya Bay: first, the accurate 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 importance, which leads us to perform a sensitivity analysis. Based on public domain topo-bathymetric data, and on information extracted from the work of Miller (1960), an approximation 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 observational data were performed in order to validate the numerical 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 detail, 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.

show abstract

Section: Introductionmentioning

confidence: 99%

The Lituya Bay landslide-generated mega-tsunami – numerical simulation and sensitivity analysis

González‐Vida

Macías

Castro

et al. 2019

Nat. Hazards Earth Syst. Sci.

View full text Add to dashboard Cite

show abstract

“…Besides they are, on some occasions, extremely destructive as they form near the coast or in the same coastline if they are aerial. Sometimes landslides may generate so-called mega-tsunamis which are characterized by localized extreme run-up heights (Lituya Bay, 1958Miller (1960; Fritz et al (2009); 1934 Tafjord event, Norway Jørstad (1968); Harbitz et al (1993), Taan Fjord, October 17, 2015 Bloom et al (2016); Higman et al (2017), among many others). For seismic tsunami simulations, in general, the most critical phases are generation and arrival to a coast, including inundation.…”

Section: Introductionmentioning

confidence: 99%

The Lituya Bay landslide-generated mega-tsunami. Numerical simulation and sensitivity analysis

González‐Vida¹,

Macías²,

Díáz³

et al. 2018

Preprint

View full text Add to dashboard Cite

Abstract. The 1958 Lituya Bay landslide-generated mega-tsunami is simulated using the Landslide-HySEA model, a recently developed finite volume Savage-Hutter Shallow Water 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 inundated area and a precise re-creation of the known trimline of the 1958 mega-tsunami of Lituya Bay. First, the accurate reconstruction of the initial slide. 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 importance, this leads us to perform a sensitivity analysis. Based on public domain topo-bathymetric data, and on information extracted from the work of Miller (1960), an approximation 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 observational data were performed in order to validate the numerical 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 detail the main features of this event in a realistic 3D basin geometry, where no smoothing or other stabilizing factors in the bathymetric data are applied.

show abstract

Section: Introductionmentioning

confidence: 99%

Answer to Reviewer #1

Macías¹

2018

Preprint

View full text Add to dashboard Cite

The 1958 Lituya Bay landslide-generated megatsunami is simulated using the Landslide-HySEA model, a recently developed finite-volume Savage-Hutter shallow water 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 inundated area and a precise recreation of the known trimline of the 1958 mega-tsunami of Lituya Bay: first, the accurate 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 importance, which leads us to perform a sensitivity analysis. Based on public domain topo-bathymetric data, and on information extracted from the work of Miller (1960), an approximation 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 observational data were performed in order to validate the numerical 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 detail, 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.

show abstract

Field Observations From a Massive Landslide Tsunami in Taan Fjord, Wrangell St. Elias National Park, Ak

Cited by 3 publications

References 0 publications

The Lituya Bay landslide-generated mega-tsunami – numerical simulation and sensitivity analysis

The Lituya Bay landslide-generated mega-tsunami – numerical simulation and sensitivity analysis

The Lituya Bay landslide-generated mega-tsunami. Numerical simulation and sensitivity analysis

Answer to Reviewer #1

Contact Info

Product

Resources

About