The numerical simulation of tsunami induced by layer-by-layer sliding of submarine slope with various initial location of landslide body is performed. For the landslide body, an elastoplastic model with layered sediments taking into account the porosity and deconsolidation of the landslide mass, resting on a relatively rigid base, is used. The characteristic parameters of the above model correspond to those of the landslide and tsunami event in the Corinth Bay on February 7, 1963 modeled by the authors (Papadopoulos et al. 2007). To numerically represent the dynamics of landslide motion numerical code FLAC is used, which in contrast to the finite element method implements an explicit finite-difference scheme for solving three-dimensional problems of continuum mechanics, and allows simulation of the nonlinear behavior of porous-saturated grounds under conditions of plastic flow above the yield stress. Because of plane slope conditions, the nonlinear system of shallow water equations is used for the numerical simulation of tsunami. The results demonstrate that at each time moment, the tsunami runup occurs at novel surface of the coastal slope that leads to complex repositioning of the shoreline point that depends on initial location of the landslide volume. Such an observation is absent in conventional (e.g. rigid block, viscoplastic etc.) models The results of the work demonstrate a rather physical picture of the process under consideration. More importantly modeling results of this work may help in identifying the generating mechanism of historical or future landslide tsunamis.

中文翻译：

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取决于海底斜坡滑坡体的初始定位的局部海啸爬升

对不同滑坡体初始位置的海底斜坡逐层滑动诱发海啸进行了数值模拟。对于滑坡体，使用层状沉积物的弹塑性模型，考虑到滑坡体的孔隙度和松解，位于相对刚性的基础上。上述模型的特征参数对应于作者模拟的 1963 年 2 月 7 日科林斯湾滑坡和海啸事件的特征参数（Papadopoulos 等，2007）。为了数值表示滑坡运动的动力学，使用数值代码 FLAC，与有限元方法相比，它实现了求解连续介质力学三维问题的显式有限差分格式，并允许在高于屈服应力的塑性流动条件下模拟多孔饱和地面的非线性行为。由于平面坡度条件，浅水方程的非线性系统被用于海啸的数值模拟。结果表明，在每个时刻，海啸爬升都发生在海岸斜坡的新表面，导致海岸线点的复杂重新定位，这取决于滑坡体积的初始位置。这种观察在传统（例如刚性块、粘塑性等）模型中是不存在的。工作的结果展示了所考虑过程的相当物理的图片。更重要的是，这项工作的建模结果可能有助于确定历史或未来滑坡海啸的发生机制。