Physical Oceanography, Vol.
THERMOHYDRODYNAMICS OF THE OCEAN
ANALYSIS OF THE INFLUENCE OF WATER EXCHANGE THROUGH THE KERCH
STRAIT ON THE SURGE PROCESSES AND CURRENTS IN THE AZOV SEA
V. A. Ivanov,
L. V. Cherkesov,
and T. Ya. Shul’ga
We present the results of numerical modeling of the influence of water exchange through the Kerch
Strait on the stationary motions in the Azov Sea. We use a three-dimensional nonlinear numerical
model to perform the analysis of extreme deviations of the sea level and the surface and deep-water cur-
rents depending on the direction and velocity of constant wind with and without regard for the water ex-
change through the strait. It is shown that the influence of water exchange with the Black Sea leads to
the increase in the maximum deviations of the sea level and the velocities of stationary currents. Thus,
in particular, it is shown that, for a wind velocity of 10
m/sec, the maximum values of the surge and cur-
rent velocities in the presence of the strait are higher than in the absence of the strait by 36 and 42%, re-
spectively. In this case, the highest current velocities are induced by the south wind.
The Azov Sea is connected with the Black Sea through the Kerch Strait by the motion of waters caused by
the difference of levels between the north (Azov Sea) and south (Black Sea) parts of the strait and the action of
winds whose influence on the level of water in the strait is, on the average, 56 times stronger than the influence
of the river discharge (and 1015 times stronger during the storms) . Thus, the realization of transport opera-
tions can be accompanied by accidents, which may occur under severe hydrometeorological conditions, when
the time of making correct decisions is strongly limited. As a result of modeling of the extreme deviations of the
sea level and the space-and-time parameters of propagation of pollutants in the Azov Sea, possible consequences
can be estimated prior to the appearance of emergency situations.
The investigations of the surge phenomena and currents in the Azov Sea in the absence of the Kerch Strait are
performed in . In these works some specific features of the formation of the fields of sea levels and currents
generated by various wind fields are revealed with the help of a three-dimensional nonlinear
In what follows, we present the results of investigations of the influence of water exchange through the
Kerch Strait on the stationary motions in the Azov Sea. A three-dimensional nonlinear numerical model is used
to perform the analysis of extreme deviations of the sea level and the surface and abyssal currents depending on
the direction and velocity of constant wind, both in the presence and in the absence of water exchange through
Marine Hydrophysical Institute, Ukrainian National Academy of Sciences, Sevastopol, Ukraine.
Corresponding author; e-mail: email@example.com.
Corresponding author; e-mail: firstname.lastname@example.org.
Translated from Morskoi Gidrofizicheskii Zhurnal, No.
3–14, July–August, 2010. Original article submitted March 10, 2009; revi-
sion submitted July 3, 2009.
0928–5105/10/2004–0239 © 2010 Springer Science+Business Media, Inc. 239