Assessment of bottom sediments accumulation intensity in the Kuyalnyk estuary

  • V. I. Medinets I. I. Mechnikov Odessa National University
  • V. G. Soloviev LTD “Ecological Safety Centre”
  • Ye. A. Cherkez I. I. Mechnikov Odessa National University
  • L. P. Fetisov LTD “Ecological Safety Centre”
  • S. V. Medinets I. I. Mechnikov Odessa National University
  • S. V. Svitlichniy I. I. Mechnikov Odessa National University
  • M. G. Botnar I. I. Mechnikov Odessa National University
DOI: https://doi.org/10.26565/1992-4224-2017-28-04
Keywords: sediments accumulation, Cesium-137, Potassium-40, Radium-226, Torium-232

Abstract

Purpose. Assessment of bottom sediments accumulation rate for two areas of the Kuyalnyk Estuary using radionuclide method. Methods. The study has been done in two areas of the Kuyalnyk Estuary: the middle part near Kovalivka village and the lower part to the north from the sanatorium, using the standard methods of sediment columns sampling and gamma-spectrometric analysis of radionuclides concentration. Results. Based on the results of the studies of 2016, layer-by-layer concentrations of Cesium-137, Potassium-40, Radium-226 and Torium-232 were determined. Analysis of vertical profiles of Cesium-137 concentrations enabled us to assess, for the first time, the intensity of sediments accumulation in two areas of the estuary for the periods 1962-1986-2016, which later were used for indicative dating of anomalies in the distribution of natural radionuclides Potassium-40, Radium-226 and Torium-232 concentrations. Conclusions. It has been shown that in the lower and middle parts of the Kuyalnyk Estuary the average rate of sediments accumulation in 1986 – 2016 made 0.8±0.1 mm/year and 1.8±0.2 mm/year respectively. In 1962-1986 sediments accumulation rate was practically the same in both parts of the estuary and made 1.9±0. mm/year. The average values for the period 1962-2016 made 1.6±0.1 mm/year and 1.8±0.2 mm/year for the lower and middle parts of the estuary respectively. It has been proposed to perform additional mineralogical studies for more precise dating of the sediment layers accumulated before 1962 and to use radionuclide method for determination of sediment accumulation rate in other water bodies of the Black Sea region.

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Author Biographies

V. I. Medinets, I. I. Mechnikov Odessa National University

кандидат фізико-математичних наук, с.н.с.

Ye. A. Cherkez, I. I. Mechnikov Odessa National University

доктор геолого-мінералогічних наук, професор

S. V. Medinets, I. I. Mechnikov Odessa National University

доктор природничих наук

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Published
2017-12-28
How to Cite
Medinets, V. I., Soloviev, V. G., Cherkez, Y. A., Fetisov, L. P., Medinets, S. V., Svitlichniy, S. V., & Botnar, M. G. (2017). Assessment of bottom sediments accumulation intensity in the Kuyalnyk estuary. Man and Environment. Issues of Neoecology, (3-4(28), 40-49. https://doi.org/10.26565/1992-4224-2017-28-04
Issue
No. 3-4(28) (2017): Людина та довкілля. Проблеми неоекології
Section
Modern Geographic and Ecological Environment Research

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