An Efficient Two-Layer Non-Hydrostatic Model for Investigating Wave Run-Up Phenomena

Magdalena, Ikha; Erwina, Novry

doi:10.3390/computation8010001

Cited by 9 publications

(2 citation statements)

References 29 publications

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“…The transition of water from the surface layer (H) to groundwater aquifers is determined by the process of infiltration. Such two-layer and multilayer numerical models are very effective for various hydrological applications [28,63,64].…”

Section: Multilayer Numerical Model Of the Floodplain Hydrological Re...mentioning

confidence: 99%

Modeling the Territorial Structure Dynamics of the Northern Part of the Volga-Akhtuba Floodplain

et al. 2022

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The subject of our study is the tendency to reduce the floodplain area of regulated rivers and its impact on the degradation of the socio-environmental systems in the floodplain. The aim of the work is to create a new approach to the analysis and forecasting of the multidimensional degradation processes of floodplain territories under the influence of natural and technogenic factors. This approach uses methods of hydrodynamic and geoinformation modeling, statistical analysis of observational data and results of high-performance computational experiments. The basis of our approach is the dynamics model of the complex structure of the floodplain. This structure combines the characteristics of the frequency ranges of flooding and the socio-environmental features of various sites (cadastral data of land use). Modeling of the hydrological regime is based on numerical shallow water models. The regression model of the technogenic dynamics of the riverbed allowed us to calculate corrections to the parameters of real floods that imitate the effect of this factor. This made it possible to use digital maps of the modern topography for hydrodynamic modeling and the construction of floods maps for past and future decades. The technological basis of our study is a set of algorithms and software, consisting of three modules. The data module includes, first of all, the cadastres of the territory of the Volga-Akhtuba floodplain (VAF, this floodplain is the interfluve of the Volga and Akhtuba rivers for the last 400 km before flowing into the Caspian Sea), satellite and natural observation data, spatial distributions of parameters of geoinformation and hydrodynamic models. The second module provides the construction of a multilayer digital model of the floodplain area, digital maps of floods and their aggregated characteristics. The third module calculates a complex territorial structure, criteria for the state of the environmental and socio-economic system (ESES) and a forecast of its changes. We have shown that the degradation of the ESES of the northern part of the VAF is caused by the negative dynamics of the hydrological structure of its territory, due to the technogenic influence the hydroelectric power station on the Volga riverbed. This dynamic manifests itself in a decrease in the stable flooded area and an increase in the unflooded and unstable flooded areas. An important result is the forecast of the complex territorial structure and criteria for the state of the interfluve until 2050.

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Section: Multilayer Numerical Model Of the Floodplain Hydrological Re...mentioning

confidence: 99%

Modeling the Territorial Structure Dynamics of the Northern Part of the Volga-Akhtuba Floodplain

et al. 2022

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“…In order to simulate the propagation of a monochrome wave passing over a submerged breakwater, we will construct a numerical code for linear SWEs using the method of finite volume on a staggered grid as described intensively in [21][22][23][24][25][26][27][28]. This numerical scheme is free from damping error, which is really important in this research since we want to isolate the damping effect caused by the submerged breakwater only.…”

Section: Introductionmentioning

confidence: 99%

Wave Transmission by Rectangular Submerged Breakwaters

Magdalena

Atras

Sembiring³

et al. 2020

Computation

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In this paper, we investigate the wave damping mechanism caused by the presence of submerged bars using the Shallow Water Equations (SWEs). We first solve these equations for the single bar case using separation of variables to obtain the analytical solution for the wave elevation over a rectangular bar wave reflector with specific heights and lengths. From the analytical solution, we derive the wave reflection and transmission coefficients and determine the optimal height and length of the bar that would give the smallest transmission coefficient. We also measure the effectiveness of the bar by comparing the amplitude of the incoming wave before and after the wave passes the submerged bar, and extend the result to the case of n-submerged bars. We then construct a numerical scheme for the SWEs based on the finite volume method on a staggered grid to simulate the propagation of a monochromatic wave as it passes over a single submerged rectangular bar. For validation, we compare the transmission coefficient values obtained from the analytical solution, numerical scheme, and experimental data. The result of this paper may be useful in wave reflector engineering and design, particularly that of rectangle-shaped wave reflectors, as it can serve as a basis for designing bar wave reflectors that reduce wave amplitudes optimally.

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Analytical and numerical studies for Seiches in a closed basin with bottom friction

Magdalena

Rif'atin

Matin

2020

Theoretical and Applied Mechanics Letters

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An Efficient Two-Layer Non-Hydrostatic Model for Investigating Wave Run-Up Phenomena

Cited by 9 publications

References 29 publications

Modeling the Territorial Structure Dynamics of the Northern Part of the Volga-Akhtuba Floodplain

Modeling the Territorial Structure Dynamics of the Northern Part of the Volga-Akhtuba Floodplain

Wave Transmission by Rectangular Submerged Breakwaters

Analytical and numerical studies for Seiches in a closed basin with bottom friction

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