Assessment of the Impact of Riverbeds Depth in the Northern Part of the Volga-Akhtuba Floodplain on the Dynamics of Its Flooding

Vasilchenko, Ann; Voronin, A. A.; Svetlov, Andrey; Antonyan, N.

doi:10.12732/ijpam.v110i1.17

Cited by 7 publications

(4 citation statements)

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“…The study of the influence of changes in the depth of small channels on flood dynamics in the VAF showed that it is significant only for floods with small volumes occurring with a frequency of less than 20% [76]. Therefore, the degradation of small channels does not affect the studied frequency ranges, which characterize our three types: unflooded, unstable flooded and stable flooded territories.…”

Section: Modeling the Floodplain Territorial Structure: Methods Instr...mentioning

confidence: 84%

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: Modeling the Floodplain Territorial Structure: Methods Instr...mentioning

confidence: 84%

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

et al. 2022

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“…The optimal hydrographs of the Volga Hydroelectric Power Station have been constructed. And finally a new approach optimizing the hydrotechnical projects has been developed [46][47][48].…”

Section: Engineering Applicationsmentioning

confidence: 99%

A Numerical Simulation of the Shallow Water Flow on a Complex Topography

Хоперсков¹,

Khrapov²

2018

Numerical Simulations in Engineering and Science

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In current chapter, we have thoroughly described a numerical integration scheme of nonstationary 2D equations of shallow water. The scheme combines the smoothed particle hydrodynamics (SPH) and the total variation diminishing (TVD) methods, which are sequentially used at various steps of the combined SPH-TVD algorithm. The method is conservative and well balanced. It provides stable through calculations in presence of nonstationary "water-dry bottom" boundaries on complex irregular bottom topography including the transition of such a boundary between wet and dry bottom through the computational boundary. Multifarious tests demonstrate the effectiveness of the combined SPH-TVD scheme application for a solution of diverse problems of the engineering hydrology.

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“…where b ≥ 0 is a normalizing factor that takes into account the environmental value of the VAF, λ ≥ 0 is an optimized fine rate from the federal government) the solution of problem (3) is equilibrium in the Hermeyer's hierarchical game, and it has the form…”

Section: The Subsystem Of Game-theoretic Analysismentioning

confidence: 99%

“…These subsystems we can use separately or in different combinations to solve various control tasks. Our previous works [2,3] describe the use of this DSS in the management of the flood hydrological regime and hydrotechnical projects in the northern part of the VAF.…”

Section: Introductionmentioning

confidence: 99%

Decision Support System for Urbanization of the Northern Part of the Volga-Akhtuba Floodplain (Russia) on the Basis of Interdisciplinary Computer Modeling

Voronin

Isaeva

Хоперсков

et al. 2017

Communications in Computer and Information Science

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There is a computer decision support system (CDSS) for urbanization of the northern part of the Volga-Akhtuba floodplain. This system includes subsystems of cognitive and game-theoretic analysis, geoinformation and hydrodynamic simulations. The paper presents the cognitive graph, two-level and three-level models of hierarchical games for the cases of uncontrolled and controlled development of the problem situation. We described the quantitative analysis of the effects of different strategies for the spatial distribution of the urbanized territories. For this reason we conducted the territory zoning according to the level of negative consequences of urbanization for various agents. In addition, we found an analytical solution for games with the linear dependence of the average flooded area on the urbanized area. We numerically computed a game equilibrium for dependences derived from the imitational geoinformation and hydrodynamic modeling of flooding. As the result, we showed that the transition to the three-level management system and the implementation of an optimal urbanization strategy minimize its negative consequences.

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Assessment of the Impact of Riverbeds Depth in the Northern Part of the Volga-Akhtuba Floodplain on the Dynamics of Its Flooding

Cited by 7 publications

References 0 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

A Numerical Simulation of the Shallow Water Flow on a Complex Topography

Decision Support System for Urbanization of the Northern Part of the Volga-Akhtuba Floodplain (Russia) on the Basis of Interdisciplinary Computer Modeling

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