Sonya Beisel

Institute of Computational Technologies

Currently, the most popular approach for assessing the tsunami hazard on a coast is the PTHA (Probabilistic Tsunami Hazard Assessment). In this preliminary study, we develop one of the variants of the SPTHA (Seismic PTHA) method, adapted to solving local tsunami zonation problems for near-field sources. The approach is applied to assessing the tsun...

Exact solutions of the system of nonlinear shallow water equations on paraboloid are constructed by the method of group analysis. These solutions describe fast wave motion of the fluid layer and slow evolution of symmetric localized vortices. Explicit formulae are obtained for asymptotic solution related to the linear shallow water approximation. N...

The paper presents the results of numerical and physical modeling of tsunami waves in the bay. The occurrence of tsunamis was studied and its parameters are evaluated. The elevation of the water free surface was estimated at various points in the water area and the run-up on the beach was determined. The comparison of the experimental and numerical...

The report presents an analysis of the tsunami danger of the Russian Black Sea coast, obtained with the use of model sources of tsunamigenic earthquakes. To determine the focal areas of the Black Sea, creating the greatest threat to the coast of the Crimea and the Krasnodar Territory, the system of 144 model sources was built, consisting of three p...

The study focuses on the sensitivity of frequency dispersion effects to the form of initial surface elevation of seismic tsunami source. We vary such parameters of the source as rupture depth, dip-angle and rake-angle. Some variations in magnitude and strike angle are considered. The fully nonlinear dispersive model on a rotating sphere is used for...

Numerical technique for studying surface waves appearing under the motion of a submarine landslide is discussed. This technique is based on the application of the model of a quasi-deformable landslide and two shallow water models, namely, the classic (dispersion free) one and the completely nonlinear dispersive model of the second hydrodynamic appr...

An approach to the computer simulation of a tsunami run-up on the coast is presented, based on nested grids and the large-particle method. The computational algorithms are based on the classical equations of shallow-water theory. The main elements of the developed computational technology are described and the results are given of the verification...

The tsunami hazard for the coast of the Sea of Okhotsk requires a careful analysis, because this sea will be a zone of responsibility for the Tsunami Warning Service for the Far East coast of Russia. While it is not subject to such hazards on the part of seismogenic zones that can produce dangerous tsunamis, nevertheless the Sea of Okhotsk is open...

Results of a numerical simulation of the action of distant tsunamis on the coast of the Russian Far East are presented. It is shown that waves generated by focuses of the strongest M9 earthquakes in the region of South Chilean coast, as well as in the region of Papua New Guinea and Solomon Islands, are most dangerous for this coast. Other tsunamige...

The authors study the surface waves which are generated by the submarine landsliding on a curvilinear bottom slope of a deep reservoir. The shallow water models of the first and second approximations are used to describe the surface waves. An underwater landslide is described by the model of motion of a "quasi-deformed" body on curvilinear surface...

Equations of a landslide motion over an uneven underwater slope subject to gravity and buoyancy forces, water friction and resistance are presented. A simulation of surface waves generated by a landslide in a bounded reservoir with a parabolic bottom profile has been performed within the nonlinear shallow water equations, and the results of that si...

Most of the landslide models which are currently used in the literature can be conventionally divided into three big categories. The first category contains the simplest models where the landslide shape and its trajectory are known a priori. Another approach consists in assuming that the landslide motion is translational and the sliding mass follow...

In this work we study the generation of water waves by an underwater sliding mass. The wave dynamics are assumed to fell into the shallow water regime. However, the characteristic wavelength of the free surface motion is generally smaller than in geophysically generated tsunamis. Thus, dispersive effects need to be taken into account. In the presen...

This paper is focused on the study of the effect of an underwater slope unevenness on the wave mode characteristics caused by the motion of a landslide over this slope. Using the simplest model representation of a landslide in the form of a rigid body, the authors consider two model reliefs, taking to some extent into account the peculiarities of t...

We present the results of numerical modelling of surface wave generation by the movement of submerged deformable body along the slope, which simulates the real coastal slope. The multiparametric computations are carried out within the shallow water approximation that allowed to determine the dependence of wave pattern on the depth of landslide subm...

1] A record of a tsunami event riding on the usual tide signal was recorded by a floating-type tidal gauge installed in the port of Yafo, Israel. The tsunami was triggered by an earthquake in the Aegean Sea on 9 July 1956. This paper presents a retrieval of tsunami waves from the record. At the first stage of the study an attempt had been undertake...

Catastrophic tsunamis that flooded the ocean coast in the past had taken many human lives and destroyed the infrastructure of the coastal areas in the Pacific and elsewhere. Recent tragic events in the Indian Ocean motivated governments to develop new and improve the existing tsunami warning systems capable to mitigate the impact of catastrophic ev...

We describe results obtained in numerical investigation of tsunami generation by a moving submerged landslide which is simulated by a solid body sliding down a slope. We perform complex multiparameter calculations by algorithms based on a hierarchy of wave hydrodynamics models comprising shallow water equations and full hydrodynamical equations of...

The results obtained in numerical studies of landslide mechanism of tsunami generation on the basis of a complex of multiparameter calculations with the help of algorithms, based on hierarchy of models of wave hydrodynamics, are presented. The dependences of the process of wave formation on length and width of landslide, on the depth of its bedding...