Changes in Topography of the Coastal Zone of the Bakalskaya Spit from 2018 to 2019

V. I. Rudnev, B. V. Divinskiy, R. D. Kosyan*

P.P. Shirshov Institute of Oceanology of RAS, Moscow, Russia

* e-mail: rkosyan@hotmail.com

Abstract

A comparative analysis is performed for the results of echo-sounding and aerial surveys of 2018 and 2019 in order to determine changes in the coastline and topography of the coastal zone of the Bakalskaya Spit that occurred during the year and also to assess the influence of hydrodynamic factors led to these transformations. The dynamics of changes in the spatial position of underwaterbars is shown. A differential bathymetry map of the water area was constructed. Calculations were made to evaluate the quantitative indicators of the sand and shell material transfer from the western to eastern part of the region as well as to assess permanent loss of precipitation from the coastal zone. It is established that the amount of sedimentary material released into the eastern part of the spit during the year exceeds that of soil eroded in its western part. The role of wind waves as a determining factor of hydrodynamic impact on the coastal zone of the test site is defined. It is noted that uncontrolled anthropogenic activity leads to accelerated degradation of a unique natural object.

Keywords

polygon, bathymetry, topography, profile, underwater bar, morphometry, Bakalskaya spit, erosion, wind waves.

Acknowledgments

The research is performed under programme no. 0149-2019-0014. Marine exploration, office analysis of field data and references analysis are supported by grants no. 18-05-80035 and 19-05-00041 of the Russian Foundation for Basic Research.

For citation

Rudnev, V.I., Divinskiy, B.V. and Kosyan, R.D., 2020. Changes in Topography of the Coastal Zone of the Bakalskaya Spit from 2018 to 2019. Ecological Safety of Coastal and Shelf Zones of Sea, (1), pp. 22–35. doi:10.22449/2413-5577-2020-1-22-35 (in Russian).

DOI

10.22449/2413-5577-2020-1-22-35

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