DBPapers
DOI: 10.5593/sgem2017/31/S15.109

EXTREME LEVELS OF THE SEA OF AZOV

L.A. Bespalova, O.V. Ivlieva, E.V. Bespalova, E.M. Kazachkova
Monday 11 September 2017 by Libadmin2017

References: 17th International Multidisciplinary Scientific GeoConference SGEM 2017, www.sgem.org, SGEM2017 Conference Proceedings, ISBN 978-619-7408-04-1 / ISSN 1314-2704, 29 June - 5 July, 2017, Vol. 17, Issue 31, 863-870 pp, DOI: 10.5593/sgem2017/31/S15.109

ABSTRACT

The present study investigates and evaluates the frequency of emerging extreme wind-induced water level fluctuations, which line up with the marks ‘adverse event’ and ‘dangerous event’.
The method we applied involved statistics throughout 1972-2016. Standard observation data from hydrometer stations of the Sea of Azov were processed.
The study provides the strong evidence that this period had abnormal level activity:
- annual cycle of level had marks above the average sea level datum; rising tide was 0,19 cms per year
- range of oscillation and rare occurrence proportion of extremely high level have increased
- the number of dangerous and adverse events occurred 9 a year on average; the frequency of storm surges and dangerous events was 69% from them
- dynamic analysis of extreme wind-induced water level fluctuations highlighted the cyclic character of these dangerous events: emerging cycles of storm surges lasted for 10 – 11 years were revealed.
The results obtained can be used for enhancement of monitoring efficiency of dangerous hydrological events their forecasting.

Keywords: extreme levels, adverse and dangerous event, monitoring, standard observation, Sea of Azov.