Simulating Salinity Variations in the Gulf of Taganrog at Storm Surges

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

doi:10.1134/s0097807819060046

Cited by 2 publications

(1 citation statement)

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“…The Azov3D software package implements a mathematical model of hydrodynamic processes in coastal systems based on the equations of motion (Navier-Stokes) in three coordinate directions and the continuity equation for a fluid with variable density. In contrast to the known mathematical models used in the works of other researchers, built on the Saint-Venant equations [27], this approach allows the consideration of many variables, such as the transport of heat and salts, the variable density of the aqueous medium, friction on the bottom and wind stresses, turbulent exchange, the Coriolis force, river runoff, evaporation, and precipitation. In addition, it is also considered the complicated and dynamically changing geometry of the waterbody, which makes it possible to increase the accuracy of modeling, detect different-scale eddy structures of currents in coastal systems, and act as natural traps for pollution.…”

Section: Discussionmentioning

confidence: 99%

Mathematical Modeling of the Phytoplankton Populations Geographic Dynamics for Possible Scenarios of Changes in the Azov Sea Hydrological Regime

et al. 2021

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Increased influence of abiotic and anthropogenic factors on the ecological state of coastal systems leads to uncontrollable changes in the overall ecosystem. This paper considers the crucial problem of studying the effect of an increase in the water’s salinity in the Azov Sea and the Taganrog Bay on hydrobiological processes. The main aim of the research is the diagnostic and predictive modeling of the geographic dynamics of the general phytoplankton populations. A mathematical model that describes the dynamics of three types of phytoplankton is proposed, considering the influence of salinity and nutrients on algae development. Discretization is carried out based on a linear combination of Upwind Leapfrog difference schemes and a central difference scheme, which makes it possible to increase the accuracy of solving the biological kinetics problem at large values of the grid Péclet number (Peh > 2). A software package has been developed that implements interrelated models of hydrodynamics and biogeochemical cycles. A modified alternating-triangular method was used to solve large-dimensional systems of linear algebraic equations (SLAE). Based on the scenario approach, several numerical experiments were carried out to simulate the dynamics of the main species of phytoplankton populations at different levels of water salinity in coastal systems. It is shown that with an increase in the salinity of waters, the habitats of phytoplankton populations shift, and marine species invasively replace freshwater species of algae.

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Section: Discussionmentioning

confidence: 99%