Field of concentration and dynamics of total suspended matter at the southwestern coast of crimea on the basis of natural observations data and numerical simulation

P.D. Lomakin1,2, Yu.N. Ryabtsev1, A.I. Chepyzhenko1

1Marine Hydrophysical Institute of RAS, RF, Sevastopol, Kapitanskaya St., 2

2Institute of Natural and Technical Systems, RF, Sevastopol, Lenin St., 28

  E-mail: p_lomakin@mail.ru

DOI: 10.33075/2220-5861-2020-1-95-101

UDC 504+551. 465

Abstract:

     Based on the expedition data organized by the Russian Geographical Society (Sevastopol) and carried on by employees of the Marine Hydrophysical Institute and the Institute of Natural and Technical Systems in November 2018, sources are found and patterns of the structure of the concentration field of total suspended matter in coastal areas off the south-west coast of the Crimean peninsula are analyzed. For each of the identified sources, a numerical simulation of the suspension propagation process and accumulation in the system of local currents depending on wind activity is performed. The scales of influence zones of anthropogenic suspension sources  are estimated. Probable places of its accumulation are determined. According to the expedition  materials in the studied water area, three sources of suspended matter that are of anthropogenic origin are identified.We consider the functioning of  small fishing vessels as the first source. The second source of suspended matter is found between the mooring lines at the berths of ships. The third source is waste water. A numerical experiment showed the following. Suspension is transported in the bay both in the system of bottom and surface currents and in vertical flows. In the upper water layer, the zones of maximum influence of the two sources of suspended matter located in the western part of the bay are small and are close to these sources. The influence zone of the third source is localized in two places along the western coastline. In the bottom layer for the third source, suspension is suspended in the cut part of the bay. For the second source, a gradual removal of suspended matter into its central part is noted at the bottom. For the third source, suspension can be carried out in any direction, depending on the wind rose, with a small prevalence of suspended matter distribution along the bay and, accordingly, its deposition at the bottom in the coastal region.

Keywords: total suspended matter, suspension distribution and accumulation, Crimean peninsula, Black Sea.

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[IEEE] P. D. Lomakin, Y. N. Ryabtsev, and A. I. Chepyzhenko, “Field of concentration and dynamics of total suspended matter at the southwestern coast of crimea on the basis of natural observations data and numerical simulation,” Monitoring systems of environment, no. 1, pp. 95–101, Mar. 2020.

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