Wind-Driven Water Level Variation of the Mouth Area of the Don: Numerical Modelling and Change Scenarios

Chikin, A. L.; Kleshchenkov, A.V.; Чикина, Л. Г.; Korshun, A.M.

doi:10.23885/2500-0640-2017-13-3-39-49

Cited by 5 publications

(3 citation statements)

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“…The present work is a continuation of the studies presented in [13]. The delta areas is expanded to the boundary with the Taganrog Bay and includes three main branches of the Don: the Old Don, the Bolshaya Kalancha, passing into the Mokraya Kalancha and the Bol'shaya Kuterma.…”

Section: Methodsmentioning

confidence: 88%

Numerical Study of the Water Flow Effect on the Water Level in the Don Mouth

Chikin¹,

Kleshchenkov²,

Chikina³

2019

PhO

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The purpose of the paper is to determine the patterns of the level regime formation in the Don riverbed and the delta area of its valley at different volumes of the river flow discharge and water levels in the Taganrog Bay. Methods and Results. The mathematical model of the river Don flow in its delta area is described. The mainstream consisting of several reaches is considered at its running into the receiving reservoir the Taganrog Bay. The model is described by the Saint-Venant system of equations, which is solved by the finite-difference methods. The equations are approximated at the four-point template that leads to the system of linear equations with a five-diagonal matrix. Roughness coefficients were selected for different water flow discharges. The simulated values of the water flow discharge and the flow velocity are compared with the values observed at different water levels in the Taganrog Bay. The results of the numerical study of the water flow effect at the estuary top upon the water surface level in the riverbed were obtained at different water levels in the receiving reservoir. It is numerically defined that the flow discharge value exerts a significant effect on the surface level of the Don mainstream. However, the flow almost does not influence the water level in the river delta area. At the same time, the water level in the Taganrog Bay significantly affects the surface level in the delta reaches; and no its influence is observed in the top part of the riverbed. Conclusions. The computational experiments involving the mathematical model showed that in the mouth area above the first node of the Don delta, the level surface was significantly influenced by the flow discharge, whereas in its lower sectionby the water level in the Taganrog Bay.

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Section: Methodsmentioning

confidence: 88%

Numerical Study of the Water Flow Effect on the Water Level in the Don Mouth

Chikin¹,

Kleshchenkov²,

Chikina³

2019

PhO

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“…where b is the current channel width. A detailed description of the numerical implementation of the hydrodynamic component (2) is given in [17].…”

Section: Main Equationsmentioning

confidence: 99%

“…Calculations on a model problem The computational grid consisted of 154 nodes with a step of 1000 m, the channel morphometric data were taken from [19]. As the initial distribution of the flow parameters, the parameters obtained at a steady flow for a median flow rate of 535 m 3 /s [17] and a water level in the Taganrog Bay of 0 m (according to the Baltic system) were taken. The calculations were carried out for a time period of 48 hours.…”

Section: Main Equationsmentioning

confidence: 99%

Numerical Study of the Process of Salt Water Inflow to the Don Mouth from the Taganrog Bay

Chikin¹,

Чикина²

2021

PhO

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Purpose. Numerical study based on the model example is aimed at examining the process of the salt water inflow to the Stary Don sleeve from the Taganrog Bay due to the wind water surge. Methods and Results. Complex mathematical model of the flow and salt distribution in the open riverbed is described. The section of the River Don, consisting of the Stary Don sleeve and a part of the main channel was considered. Salt is delivered through the host reservoir – the Taganrog Bay. The model is described by the system of Saint-Venant equations and the convection-diffusion equation. The problem is solved by the finite-difference methods. The results of the numerically studied influence of the sea surface level in the Taganrog Bay both on the flow nature in the Don Delta area and the degree of salt penetration upstream of the river are obtained. It was numerically established that the flow rate did not significantly affect salt concentration in the Don main channel. Conclusions. The computational experiments showed that the decisive factor in the process of the salt water inflow to the Don Delta from the Taganrog Bay consisted in the sea level significant increase resulting from extreme wind surges; and the preceding runoffs enhanced this effect even greater. The represented model gives an idea of the general trend in the process of the Don Delta possible salinization as a result of the surge phenomena.

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Modelling of Water Level Oscillations in the Don Delta According to Wind Situation Forecasts

2023

Bulletin of the SUSU. MMP

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Wind-Driven Water Level Variation of the Mouth Area of the Don: Numerical Modelling and Change Scenarios

Cited by 5 publications

References 0 publications

Numerical Study of the Water Flow Effect on the Water Level in the Don Mouth

Numerical Study of the Water Flow Effect on the Water Level in the Don Mouth

Numerical Study of the Process of Salt Water Inflow to the Don Mouth from the Taganrog Bay

Modelling of Water Level Oscillations in the Don Delta According to Wind Situation Forecasts

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