Numerical simulation of tsunami waves generated by the underwater landslide for the Northern Coast of the Black Sea (Dzhubga Area)

L. I. Lobkovsky, I. A. Garagash, R. K.H. Mazova

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

The new method of computation of the underwater landslide motion in the framework of the elastoplastic model is presented. This model, with seismic or aseismic action, makes it possible to model the nonlinear behaviour of a porous saturated sedimentary mass under conditions of its plastic flow beyond the yield strength. The computation method is formulated for the example of a possible landslide process in the region of Dzhubga (northwest coast of the Black Sea). A model for numerical simulation of a tsunami wave generation upon the slipping of the underwater landslide is presented. The numerical simulation of tsunami wave is based on a nonlinear system of shallow water equations. The results of numerical modelling of the motion of a landslide along the underwater slope and computation of generation, propagation and runup of a tsunami, induced by the underwater landslide are presented. It is noted that when the tsunami wave is generated by a landslide computed within the framework of an elastoplastic model, the problem changes significantly in comparison with the methods for computation of a landslide as the motion of a rigid body or a viscous fluid. The evolution of the form of surface water wave generated by the underwater landslide with time, for the values of the maximum friction angle, determining the properties of the landslide body, is studied. The process of arising of a local tsunami, the process of formation of a crest climbing the beach, from which the landslide came down, is studied in details.

Original languageEnglish
Pages (from-to)1298-1306
Number of pages9
JournalGeophysical Journal International
Volume218
Issue number2
DOIs
Publication statusPublished - 1 Aug 2019
Externally publishedYes

Keywords

  • numerical modelling
  • sedimentary basin processes
  • Submarine landslides
  • tsunami warning
  • wave propagation

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