SEA-PORT CONSTRUCTION IMPACT ON LIMAN NATURE ALONG THE BLACK SEA COASTAL ENVIRONMENT

Construction of sea-ports in limanic aquathory along the Northern Black Sea coast have prefer impact on the coastal environment. Especially deep impact have liman bottom artificial deepening, liman slopes artificial reconstruction, navigate canals, jetties of different sizes, ground dumps etc. Typical examples are Odessa, Ill'ichevsk, Yuzhniy commercial sea-ports in northern sector of the Black Sea. On shores nearest Port Yuzhniy jetties was firstly employed new construction against sea wave erosion. This new artificial shore terrace, that consist of natural matherials, expressed as shore protection, purification of sea water, needless ground depot, new shore territory and squire for recreants simultaneous.

ON THE GEOMORPHOLOGY OF THE SEVASTOPOL’S COASTS

The main role in the relief development was at the tectonical fractures, the river erosion when sea level dropped and the sea abrasion, which beginning about 7–8 thousands of years ago. The erosion basis of main small valleys was at the depth 18–19 m and 31–32 m. The seismoacoustic investigations revealed buried valleys on the shelf at depth about 20 m with thickness of sediment infilling about 20 m.

REFRACTIONOF WIND WAVES IN MESHWATER ZONNE BY THE SHORES OF ANY UNDERWATER SLOPE MORFOSTRUCTURE

The graphical analytical technique for refraction waves in coastal water areas under condition of water slope relief in shapes of bathymetry charts. The given technique is based on results of theoretical studies in water areas refractions in sea bays made by the authoress. The convergences data obtained are suited for foolproof calculations results for proposed methods of wave tank supervision along with natural of measurements and numerical results. The given technique make it possible to recreate the approximate picture wave field refraction on the coastal zone up to the border of waves turnover.

RATING OF LOSS OF SEDIMENTS OF PEBBLE MATERIAL INTO UNDERWATER CANYONS ON INTERFLUVIAL AREA OF MSYMTA AND PSOU RIVERS

On the basis of the comparison of the topographic and bathymetric material of different years there is given an assessment of the pebble material balance and loss of sediments into underwater canyons on interfluvial area of Msymta and Psou rivers.

COASTAL PROCESSES IN ZONE OF UNDERWATER CANYONS ON INTERFLUVIAL AREA OF MSYMTA AND PSOU RIVERS

There is considered dynamics of the shore between the Msymta and Psou rivers. It is shown that the loss of sediments more than solid runoff of Msymta river. The deficit is compensated by erosion of pebble beaches on the area from canyon «Novy» to the cape «Konstantinivski».

ANALYSIS OF THE MODERN GRAIN-SIZE COMPOSITION VARIABILITY OF THE ANAPA BAY-BAR BEACH SEDIMENTS

The results of realized in 2010 field researches of the spatial and time grain-size structure variability of beach and bottom sediments of the bay-bar Anapskaya southern part are presented in this paper. Irretrievable carrying out of sediment particles to depths more than 7 m intensifies with their size decrease to 0,1 mm. As over 70 % bottom and about 60 % beach sediments are presented by fractions less 0,16 mm on bay-bar Anapskaya southern part, namely at this part there is sand material massive carrying out to depth. Potential danger of the investigated site geosystem degradation is revealed.

VERIFICATION OF DEAN’S EQUILIBRIUM BEACH PROFILE FORMULA FOR LARGE MAN-MADE LAKES

In the paper the possibility of using Dean’s equilibrium beach profile formula for a large man-made lake coastal conditions was studied. A stringent test of its adequate use was made based on mathematical statistics. The calculations were performed for the real bottom profile of the Novosibirsk reservoir beach.

KERCH STRAIT IN KAMYSH-BURUN SPIT AREA: HIGH-RESOLUTION SEISMOACOUSTIC APPROACH

The seismoacoustical investigations was made in the western part of the Kerch strait (Azov sea) near Kamysh-Burun spit. The fracture zone with dislocated sedimentary rocks layers and buried erosional surface was revealed to the west of spit. Three seismofacial units was revealed to the east of spit. The first unit was modern sedimentary cover. The second ones has cross-bedding features and was, probably, the part of early generation of Kamysh-Burun spit, which lied to the east of its modern position. The lower border of the second unit is the erosional surface supposed of phanagorian age. The third unit is screened by acoustic shedows in large part.

ON THE METHODS OF ESTUARINE AND COASTAL MORPHODYNAMICS WITH NUMERICAL AND GEOINFORMATICAL SYSTEMS

The questions on kinematics and morphodynamics of estuarine zones assessment are considered with help of numerical and GIS methods for natural and construction systems monitoring. The monitoring is fulfilled on the basis of the time-spatial database for estuarine part of Danube to Black Sea navigational canal trough the Bystry branch of Cilia delta. To the database we include not only river and reservoir shores and depth but the constantly acting hydrometeorogical parameters as well. The database is used for river and canal navigation analysis, coastal line and fairway stability.As a result we propose the recommendations on protection and training dike structures due to the principle of natural analog type constructures for dredging, seawater rejection and soil deposits utilization as material for artificial offshore structures

ROLE OF MOUTH PROCESSES IN THE DYNAMICS OF ACCUMULATIVE FORMS IN COASTAL ZONE OF BLACK SEA (WITHIN THE RUSSIAN SECTOR)

The processes in the river mouth areas play a special role in the formation and dynamics of coastal accumulative forms. The experience of Russian and foreign specialists on investigations of river mouths shows a modern intensification of sea impact on the river deltas in the world and enhance the abrasion of their delta coastlines. These processes show a trend of transformation of different mouths from the fluvial-dominated objects to the marine-dominated objects. A striking example of this process is the variability of the mouth fan, which has a complicated structure, and the mouth bars. In most cases, the structure of the mouth fan presents several successive layers. There are the following 1) abovewater and submarine sand layers; 2) layer of silty sediments of the sea slope of the mouth fan; 3) gently sloping layers of clay, component the foot of the mouth fan; 4) layer of shelf sand, not related to the formation of mouth fan. Each of these layers is characterized by a specific size and composition of sediments. Under intensification of abrasion of the mouth accumulative forms (accordance with the stage of this abrasion), the sediments significantly differed by composition, can be penetrate in the lithodynamic coastal system. A rather complex topography of the underwater slope rugged canyons is typical for the Russian coast of the Black Sea. Through these canyons, sediments, entering the river mouth area and playing an important role in the dynamics of coastal accumulative forms, can be delivered to the depths. These depths exclude of their return.