Papers by Leonid Chubarov
Journal of Applied Mechanics and Technical Physics
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Ocean Engineering
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Вестник Башкирского университета
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Natural Hazards, 2021
Currently, the most popular approach for assessing the tsunami hazard on a coast is the PTHA (Pro... more 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 tsunami hazard of the Bechevinskaya Cove located on the eastern coast of the Kamchatka Peninsula in the northern part of Avachinsky Bay. We propose the method, algorithms and results of probabilistic assessment of the cove's tsunami hazard in order to determine the safest water areas, in which the values of the intensity measures (IMs) of tsunami will not exceed the specified threshold values with the given Average Return Periods (ARPs). The method includes analysis of seismotectonics of the region, construction of a catalog of model tsunamigenic earthquakes, determination of their statistical characteristics, scenario numerical modeling of the dynamics of tsunami waves, calculations of the values of IMs that can be exceeded with the given annual rates (ARs), namely, on average 1 time in 100, 500, 1000 years. Spatial distributions of the maximum wave heights and maximum velocities are provided for the ARs. Three configurations of the water area are considered, including the possibility of constructing protective structures, and conclusions are drawn about their influence on the tsunami hazard assessments in the cove.
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Прикладная механика и техническая физика, 2021
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Lecture Notes in Physics
The present paper gives the numerical simulation of tsunami generation and propagation in the oce... more The present paper gives the numerical simulation of tsunami generation and propagation in the ocean with real bathymetry. For the describing of this processes nonlinear shallow water equations are used, which are solved with the help of finite-difference method. Here is considered the problem of tsunami generation by bottom displacements, moving with the any given velocity. The computed displacement of
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Computational Fluid Dynamics, 1995
Computational experiment in tsunami problems is specified first of all by the multifactor physica... more Computational experiment in tsunami problems is specified first of all by the multifactor physical process including the generation of the initial perturbation (Tsunami source) resulting from an underwater earthquake, volcano eruption or another similar large-scale hazard, propagation of the wave in deep ocean and its transformation in the coastal zone, interaction with floating and fixed objects and its running up on the shore.
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Recent Developments in Theoretical and Experimental Fluid Mechanics, 1979
The present paper gives a numerical simulation of tsunami propagation in the ocean with a real ba... more The present paper gives a numerical simulation of tsunami propagation in the ocean with a real bathymetry. The computed displacement of the water surface in the generation area for a typical seismic source (Alexeev, Gusiakov /1/) is used to specify initial conditions for computing the propagation of a tsunami near the Kuril Islands. The nonlinear long-wave equations are adopted as a description of tsunami behavior and solved numerically by a finite-difference method. The wave field of tsunami and mareograms at the shore line are found. The comparison of the results with those for linear model of the tsunami propagation is carried out.
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Submarine Landslides and Tsunamis, 2003
The paper is devoted to construction of numerical algorithms for modelling tsunami runup on beach... more The paper is devoted to construction of numerical algorithms for modelling tsunami runup on beaches. Comparing numerical accounts both with analytical solutions, and with experimental data was executed.
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Natural Hazards, 1992
A sequence of computer experiments is used to study questions concerning the tsunami problem as a... more A sequence of computer experiments is used to study questions concerning the tsunami problem as a quantitative estimate of tsunami danger, detailed geographical tsunami classification, determination of the parameters of ‘critical’ tsunami waves, and the conditions of their development. We call a wave ‘critical’, if its impact on the coast is most hazardous.
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International Journal of Computational Fluid Dynamics, 1998
The class of nonlinear-dispersive (NLD) models of hydrodynamics was considered, the comparison of... more The class of nonlinear-dispersive (NLD) models of hydrodynamics was considered, the comparison of a series of hydrodynamic models was performed, and the selection of the most satisfactory model for carrying out economical and effective finite-difference schemes adequately modeling a wide class of natural wave processes was made.
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Computers & Fluids, 1987
Abstract The work is devoted to the questions of numerical modelling of long wave propagation, in... more Abstract The work is devoted to the questions of numerical modelling of long wave propagation, in particular tsunami waves, in the framework of non-linear dispersion models of the Boussinesq and Korteweg-de Vries type. The first part of the work includes a classification of some known mathematical models, in terms of dispersion correlation, phase and group velocities. Problems arising on the construction of finite-difference approximations of non-linear dispersion models are discussed in the second part of the work, special attention is given to the questions of constructing discrete boundary conditions. In the conclusion the results obtained in the course of numerical experiments and estimation of specifics of finite-difference models, and the contribution of non-linear dispersion effects in the process of wave propagation in the coastal zone, are discussed. The results of calculations of tsunami wave propagation in a wave tube with real bathymetry, are given.
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Russian Journal of Earth Sciences, 2007
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Computers & Fluids, 1984
Abstract The paper presents the results of numerical simulation of Shikotan (Nemuro-Oki) tsunami ... more Abstract The paper presents the results of numerical simulation of Shikotan (Nemuro-Oki) tsunami of 17 June 1973. Static deformations of the sea bottom are computed for some dimensional dislocation model of the seismic source with the parameters obtained from seismological observations. The computed bottom deformations are used as the initial conditions for the tsunami propagation problem in the ocean with a real bathymetry, which is considered within the framework of linear theory of shallow water. Three variants of tsunami source are examined. Travel time charts and computed mareograms at a number of points of the shoreline are presented. At 4 points, where tide-gauge records are available, the comparison of the computed mareograms with the observed ones is made. It is found that the numerical model can reproduce the basic features of the tsunami of 17 June 1973.
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Notes on Numerical Fluid Mechanics and Multidisciplinary Design
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Papers by Leonid Chubarov