Abstract
An algorithm is presented for numerical modelling of impulse water waves generated by submarine landslides moving along irregular bottom profiles. A spatially nonuniform submarine landslide moving on a spatially nonuniform slope is modelled by a “quasi-deformed” rigid body. In addition, a simplified model is studied for the particular case of landslide and bottom profiles dependent on one spatial coordinate only. Both models are used for the comparative analysis of numerical and experimental data for submarine rigid landslides moving along a plane slope. The simplified model is applied to analyse the dependences of wave characteristics on various parameters for submarine landslides moving along a sea bottom slope with monotonically increasing depth and in a bounded reservoir. The full model is used to study the landslide trajectories and the wave patterns for the model submarine landslide of a spatially irregular shape moving in the model reservoir with a spatially irregular bottom. All numerical computations are performed using the nonlinear shallow water equations with moving bottom and the time-stepping algorithm provided by a predictor–corrector scheme on adaptive grids.
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Shokina, N., Aizinger, V. On numerical modelling of impulse water waves generated by submarine landslides. Environ Earth Sci 74, 7387–7405 (2015). https://doi.org/10.1007/s12665-015-4746-3
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DOI: https://doi.org/10.1007/s12665-015-4746-3
Keywords
- Submarine landslide
- Irregular bottom
- Surface waves
- Shallow water equations
- Finite-difference scheme
- Adaptive grid