The interest to study the processes in the Imeretinka lowland increases in the last years due the few reasons. The main structures of so-called “coastal cluster” of Olympic Games 2014 built in this area. Some of planned structures effected significantly the coastal processes; they are the seaport near the river Mzimta mouth and coastal protection. The natural coastal processes in the area complicated by the effects of the underwater canyons. The natural-technogenic system requires the study with using the methods of modeling and monitoring. Wave climate of Imeretinka lowland coast estimated based on long-term data of meteorological fields above Black Sea with modeling of wave transformation in nearshore zone by the gentle slope equations. Such approach provides possibilities to assess the effect of the designed coastal protection structures on the changes of the wave parameters in nearshore zone. Numerical modeling of currents in the Black Sea using 3D circulation model with refinement in the region of canyons of the Imeretinka coast obtained. To estimate the sediment transport, 3D Lagrangian multifraction sediment transport model LagrSed is used. 2D flow fields, free-surface level and wave characteristics calculated, using 2D hydrodynamic model of the coastal zone. It has presented the few years story of modeling and monitoring of the coastal processes with the important lessons.

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A unique approach is developed for determination of along-shore flow rate of drift on beaches.For the majority of marine ports, thick enclosing structures are required to protect the water body of the port from waves and other external effects. Having considerable length in the direction transverse to the shore, the enclosing structures intercept littoral drift flowing along the shore. As a rule, these structures are designed to be impermeable to drift, since drift protection of the water body on which the port is located is one of the problems encountered in their construction.Studies of drift movement in the littoral zone of a sea, and the models and computational methods that have been developed on the basis of this drift [1 -3] have made it possible to solve many problems of the interaction between drift movement and structures. Moeover, problems requiring additional research remain unresolved.Flat beaches comprised primarily of sandy drift with particle diameters ranging from 0.1 to 1.0 mm are characteristic of certain seas of Russia (Baltic, Barents, Okhotsk). Other seas (Black) possess beaches that drop-off sharply and are comprised of sandy-gravelly-pebbly drift with particle diameters of the gravelly-pebbly fractions ranging from 1.0 to 50.0 mm. The sandy beaches, however, may also include slime fractions, and coarse inclusions right up to boulders.In engineering analyses, various relationships are employed to determine the along-shore flow rates of sandy and pebbly drift; historically, this is base on an understanding of various interactions between waves and flat beaches and beaches that drop-off sharply. The majority of relationships for the transport of drift in the littoral zone of a sea include calibration factors obtained from measurements in the section under investigation.Geologic-engineering surveys, and also experimental investigations [4,5] indicate that the material of a beach in its above-water and underwater sections is distributed nonuniformly over the transverse profile. This is caused by nonuniform initial distribution of the beach material, which is then subjected to wave action. Moreover, the maximum average size of the material is observed to be somewhat greater than the upper limit of the roll of the waves [4]. When moving in the direction of sea, the average size of the material decreases along the profile of the beach.This redistribution of material is characteristic of both sandy, and also pebbly beaches, and in certain sections of the littoral zone, it results in the formation of a profile comprised of sand in the lower underwater portion, and pebbles, and then gravel along the above-water profile. Similar transverse beach profiles have been measured for the littoral zone of the Imeretinsk Depression (Sochi), where it is planned to construct freight-handling marine ports -new freight-handling areas for the marine port of Sochi.The flow rates of pebbly and sandy drift are usually accounted for by different relationships, but, here, the actual beaches have sandy and pebbly section...

In this study of the evaluation of wave impacts on a gravity base structure (GBS) which is moored to berth No. 5 of the Centre of construction of large-capacity marine structures (CCLMS). It was identified five main wind directions that can be dangerous for the construction of CCLMS: East direction (E) South-East (SE) South direction (S), Southwest (SW), West (W) and Northwest (NW). According to the results of statistical processing of extreme storms of the 30-year period, two most dangerous directions of unrest were chosen-the Eastern direction (B) and the South-Eastern (SE) direction. Using a numerical model ARTEMIS, it was received wave field in the waters CCLMS near GBS reading for different sea levels. The simulation results showed that the wave heights affected the structure can reach 2.4 m.

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