UDC

519.65+556.5.06:504.4(268.46)

Authors

Natal’ya A. Shilova*, Igor’ I. Studenov**
*Northern (Arctic) Federal University named after M.V. Lomonosov (Arkhangelsk, Russian Federation)
**Federal Center for Integrated Arctic Research named after academician N.P. Laverov, Russian Academy of Sciences (Arkhangelsk, Russian Federation)
Corresponding author: Natal’ya Shilova, address: Naberezhnaya Severnoy Dviny, 17, Arkhangelsk, 163002, Russian Federation; e-mail: n.shilova@narfu.ru

Abstract

Calculation of the initial concentration of suspended solids and simulation of turbidity cloud distribution in aquatic ecosystems is one of the urgent tasks. This relates to the need to assess the impact of different types of works planned in water bodies on the inhabitants of these ecosystems. The solution of this problem is complex and is discussed in various scientific schools. To conduct preliminary assessments, simple engineering methods are used, which are described in normative legal documents and methodological recommendations. One of the most complex methods for predicting the dynamics of suspended matter concentration is the construction of a three-dimensional mathematical model with the subsequent development of methods for its solving using high-performance computing. On the other hand, the state’s close attention to the industrial development of the Arctic territories stipulates a comprehensive refinement of methods (both engineering and mathematical) for assessing the impact of planned works on the environment in order to level global environmental risks. This article presents the results of studying the dynamics of density of sea water as a function of temperature data and salinity, and a methodology for calculating water density based on the International Equation of State of Seawater. We have obtained the calculated values of the hydraulic particle size for different values of water density and have investigated the dependence of the change in the initial concentration of suspended solids on the deposition rate of particles. The results of a numerical experiment show the impact of water density on the initial concentration of a cloud of suspended solids, formed from a point source when dredging works in the estuarine areas of the Arctic seas.

Keywords

simulation of suspended materials concentration, equation of suspended matter transport, hydraulic size, hydrochemical seawater parameter, equation of state of seawater, impact of dredging, the White Sea

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