MODELING AND MONITORING OF THE PROCESSES IN THE COASTAL ZONE OF IMERETINKA LOWLAND, BLACK SEA, SOCHI

2017 ◽  
Author(s):  
Izmail Kantarzhi ◽  
Izmail Kantarzhi ◽  
Mark Zheleznyak ◽  
Mark Zheleznyak ◽  
Igor Leont’yev ◽  
...  
Keyword(s):  
Sediment Transport ◽  
Coastal Zone ◽  
Black Sea ◽  
Transport Model ◽  
Circulation Model ◽  
Wave Transformation ◽  
The Black Sea ◽  
Coastal Processes ◽  
Coastal Protection ◽  
Nearshore Zone

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.

MODELING AND MONITORING OF THE PROCESSES IN THE COASTAL ZONE OF IMERETINKA LOWLAND, BLACK SEA, SOCHI

2017 ◽  
Author(s):  
Izmail Kantarzhi ◽  
Izmail Kantarzhi ◽  
Mark Zheleznyak ◽  
Mark Zheleznyak ◽  
Igor Leont’yev ◽  
...  
Keyword(s):  
Sediment Transport ◽  
Coastal Zone ◽  
Black Sea ◽  
Transport Model ◽  
Circulation Model ◽  
Wave Transformation ◽  
The Black Sea ◽  
Coastal Processes ◽  
Coastal Protection ◽  
Nearshore Zone

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.

scholarly journals Complex coastal protective measures to protect the sandy beach

2020 ◽  
Vol 175 ◽  
pp. 12017
Author(s):  
Yuriy Dreizis ◽  
Vladislav Kostin
Keyword(s):  
Coastal Zone ◽  
The Black Sea ◽  
Coastal Processes ◽  
Coastal Protection ◽  
Western Coast ◽  
Shore Protection ◽  
Wave Impact ◽  
Engineering Project ◽  
Incoming Wave ◽  
Protective Measures

The environmental impact of the engineering project was taken into account when carrying out comprehensive studies of shore protection engineering measures for the Lazurnoye region of the Kherson region of Ukraine on the north-western coast of the Black Sea. The optimal configuration of hydrotechnical structures are choosen to protect the beach in the region of the incoming wave impact. The entire coastline of the Lazurnoye region is about 3000 meters. In the course of modelling and numerical experiments, the transfer of bottom sediments to the coast, the evolution of the coastline and beaches, and other coastal processes were studied. The project of comprehensive coastal protection of the Lazurnoye region, presented on the basis of mathematical and hydraulic modelling, has allowed the development of engineering solutions that meet coastal protection and environmental requirements. The most expedient variant of coastal protective measures was the creation of a system of the beachprotected structures capes from sections of the permeable slope-steps designs with wave damping chambers. The presented research results and the solution of many problems of the dynamics of the coastal zone of the sea can be considered as an attempt to manage coastal processes on rather large and complex sections of the coast with a joint solution to the problems of hydraulic engineering, management of water quality in the coastal zone of the sea, and the choice of optimal options with the least impact on the environment.

scholarly journals River sediment transport and coastal erosion in the southeastern Black Sea rivers / Transport riečnych sedimentov a erózia pobrežia riek krajiny v juhovýchodnej časti čierneho mora

2012 ◽  
Vol 60 (4) ◽  
pp. 299-308 ◽  
Author(s):  
Mehmet Berkun ◽  
Egemen Aras
Keyword(s):  
Sediment Transport ◽  
Black Sea ◽  
Coastal Erosion ◽  
The Black Sea ◽  
Coastal Protection ◽  
Anthropogenic Pressure ◽  
Hydroelectric Power ◽  
Protection Measures ◽  
Black Sea Region ◽  
Bed Material

In the Southeastern Black Sea Region, rivers are dammed for hydroelectric power and irrigation. The natural course of fluvial alluvium transport is almost completely altered because of planned and constructed dams and coastal protection measures. Decreasing volume of sediment carried to the sea cause intensification of the shore erosion. The Black Sea Rivers and coastal areas of Turkey and Georgia are under heavy anthropogenic pressure because of the bed material extraction and coastal erosion rate. In this study, environmental effects of dams and related effects of sediment transport on coastal erosion in the Eastern Black Sea region are discussed.

scholarly journals GEOMORPHOLOGICAL SAFETY OF THE COASTAL ZONE TERRITORY WITHIN THE ROOT PART OF THE LITHODYNAMIC SYSTEM OF TENDRA-DZHARYLGACH

2021 ◽  
pp. 72-78
Author(s):  
Simchenko S.V.
Keyword(s):  
Coastal Zone ◽  
Black Sea ◽  
Google Earth ◽  
Anthropogenic Factors ◽  
The Black Sea ◽  
Gps Tracking ◽  
Coastal Protection ◽  
Shore Protection ◽  
Space Images ◽  
Root Part

Today there is a problem of insufficient organization of recreational areas of the Black Sea coastal zone within the Kherson region, which is the lack of a unified systemic approach in the field of land use and management of coastal areas. Recreational services are sometimes provided in unsuitable places, which leads to unpleasant (sometimes catastrophic) consequences for both the environment and economic activity. The relief of the study area, namely the coastal zone of the Black Sea within the Kherson region, is considered as an ecological and geomorphological system, as a component in the functioning of the tourist and recreational complex. In this context, the issue of geomorphological safety of the territory, environmental risks, as factors influencing the degree of recreational attractiveness.The article analyzes modern morphometric, morphological and morphogenetic characteristics within recreational points and adjacent areas of the coastal zone of the root part of the abrasion-accumulation system Tendra-Dzharilgach. Іnvestigation was in areas of resort settlements village Zalizniy port, village Prymorske (Bolshevik) and Lazurne township of Skadovskyi district of Kherson region and unorganized places of rest in the areas between settlements by GPS-tracking method with fixing of control points for their further transfer to the geoinformation space for analysis and systematization. Differences in the development of the coastal zone in the presence and absence of coastal protection structures were revealed. The influence of natural factors (including change of wind regime, frequency and intensity of bending phenomena), anthropogenic factors (construction of sanitary zone of beaches, illegal extraction of sand from the seabed, spontaneous shore protection, transformation of undeveloped areas of the coast within recreational recreational areas (beaches) within the study area. A comparison of current data obtained from field research, digitized with data from space images of different years, obtained using GIS Google Earth Pro.Key words: geomorphological risks, anthropogenic impact, shore protection, root shore, lithodynamic system. На сьогодні існує проблема недостатньої організованості рекреаційних територій берегової зони Чорного моря в межах Херсонської області, яка полягає у відсутності єдиного системного підходу у сфері землекористування та управління приморськими територіями. Рекреаційні послуги надаються часом у непридатних для цього місцях, що призводить до неприємних (іноді катастрофічних) наслідків як для навколишнього природного середовища, так і для господар-ської діяльності. Рельєф досліджуваної території, а саме берегової зони Чорного моря у межах Херсонської області, розглядається як еколого-геоморфологічна система, як складова у функціонуванні туристсько-рекреаційного комплексу. У цьому контексті розглядається проблематика геоморфологічної безпеки території, екологічні ризики, як фактори впливу на ступінь рекреаційної атрактивності.У статті проаналізовано сучасні морфометричні, морфологічні та морфогенетичні характеристики в межах рекреаційних пунктів і прилеглих територій берегової зони корінної частини абразійно-акумулятивної системи Тендра-Джарилгач. Досліджено ділянки курортних населених пунктів с. Залізний порт, с. Приморське (Більшовик) та смт Лазурне Скадовського району Херсонської області та місця неорганізованого відпочинку на ділянках між населеними пунктами методом GPS-трекінгу з фіксацією контрольних точок для подальшого їх перенесення в геоінформаційний простір з метою аналізу і систематизації. Виявлено відмінності у розвитку берегової зони за наявності та відсутності берегозахисних споруд. Проаналізовано вплив природних факторів (зокрема зміна вітрового режиму, частота та інтенсивність згіннонагінних явищ), антропогенних факторів (забудова санітарної зони пляжів, незаконний видобуток піску з дна моря, «стихійний берегозахист», трансформація необлаштованих ділянок берега рекреантами в межах автокемпінгів) на динаміку рекреаційних зон (пляжів) у межах досліджуваної території. Проведено порівняння сучасних даних, отриманих у результаті польових досліджень, оцифрованих із даними космічних знімків різних років, отриманих за допомогою ГІС Google Earth Pro.Ключові слова: геоморфологічні ризики, антропогенний вплив, берегозахист, корінний берег, літодинамічна система.

SPECIALIZED OCEANOGRAPHIC DATABASE FOR INFORMATION SUPPORT OF THE BLACK SEA COASTAL ZONE STUDY

2017 ◽  
Author(s):  
Alexey Khaliulin ◽  
Alexey Khaliulin ◽  
Andrey Ingerov ◽  
Andrey Ingerov ◽  
Elena Zhuk ◽  
...  
Keyword(s):  
Coastal Zone ◽  
Black Sea ◽  
Data Bank ◽  
Information Support ◽  
The Black Sea ◽  
Federal State ◽  
Short Term ◽  
Marine Hydrophysical Institute ◽  
State Budget ◽  
Oceanographic Data

The information resources of the Federal State Budget Scientific Institution “Marine Hydrophysical Institute of RAS” (FSBSI MHI) oceanographic data bank (MHI BOD), which contains about 115,000 oceanographic and more than 27,000 hydrochemical stations accomplished in the Black Sea coastal zone, as well as experience accumulated while providing information support of the coastal zone research, main directions of activities, and short-term plans are considered.

Anthropogenic Impact on the Lithodynamics of the Coastal Zone of the Southern and Western Black Sea Coast (Review)

2021 ◽  
Author(s):  
T. V. Efremova ◽  
Yu. N. Goryachkin ◽  
◽  
Keyword(s):  
Coastal Zone ◽  
Black Sea ◽  
Bottom Sediments ◽  
Anthropogenic Impact ◽  
River Flow ◽  
The Black Sea ◽  
Negative Consequences ◽  
Coastal Zones ◽  
Natural Dynamics ◽  
The Impact

Anthropogenic impact on lithodynamics of the coastal zone changes the natural dynamics of bottom sediments, which leads to increased abrasion and swelling of beaches, activation of landslide processes creating a threat of destruction of the coastal infrastructure. The article aims at providing an overview of the scientific literature on the anthropogenic impact on lithodynamics of the coastal zone of the southern and western coasts of the Black Sea (shores of Romania, Bulgaria and Turkey). The work shows that with all the differences in the natural conditions of the coastal zones of these countries the types of anthropogenic effects they undergo are almost the same. These include: hydrotechnical construction without regard to the impact on the neighbouring coast sections; reduction of solid river flow due to river regulation by reservoirs; construction of capital facilities directly on the beaches; illegal extraction of sand from beaches and river beds; dredging with sale of the extracted material to construction companies; covering of cliffs by various structures; destruction of coastal dunes, etc. The main negative consequences of these actions are reflected in disruption of natural dynamics and shortages of bottom sediments, changes in the coastline, reduced aesthetic attractiveness and accessibility of shores, destruction of coastal ecosystems. The article also provides information on the legislation of these countries regarding environmental management in the coastal zone

scholarly journals TO THE 75th ANNIVERSARY OF PROFESSOR R.D. KOS’YAN

2021 ◽  
Vol 49 (2) ◽  
pp. 123-131
Author(s):  
A. G. Zatsepin ◽  
S. B. Kuklev ◽  
T. A. Podymova
Keyword(s):  
Coastal Zone ◽  
Black Sea ◽  
The Black Sea ◽  
Sediment Discharge ◽  
75Th Anniversary ◽  
Public Figure ◽  
Prominent Scientist ◽  
The World ◽  
International Projects ◽  
Academy Of Sciences

On May 20, 2021, the head of the Laboratory of Lithodynamics and Geology of the Southern Department of the Institute of Oceanology of the Russian Academy of Sciences, Professor, Doctor of Geographical Sciences, prominent scientist and public figure Kosyan Ruben Derenikovich is 75 years old. R.D. Kosyan is a leading Russian expert in the field of studying the regularities of hydrogenic movements of detrital material in the coastal zone of the sea. He is a participant of many expeditions and thematic conferences, an expert on some major international projects, and lectures in various countries of the world. Under his leadership, a group of models was developed to calculate the long-shore sediment discharge, as well as the associated deformation of the relief in the coastal zone of the sea. R.D. Kosyan was awarded the Order of Courage, as well as the International Medal of the Black Sea Commission for merits in the study of the Black Sea. Congratulations to the wonderful scientist-oceanologist on the solemn date.

scholarly journals Consorts of gastropod Rapana venosa (Valenciennes, 1846) in the Northern Black Sea. Part I: Porifera, Cnidaria, Bryozoa, Chordata

2017 ◽  
Vol 2 (2) ◽  
pp. 20-33 ◽  
Author(s):  
I. P. Bondarev ◽  
N. K. Revkov
Keyword(s):  
Surface Area ◽  
Coastal Zone ◽  
Black Sea ◽  
The Black Sea ◽  
Bottom Fauna ◽  
Depth Range ◽  
Shell Surface ◽  
Rapana Venosa ◽  
The Core ◽  
Rapa Whelk

Gastropod mollusk-invader Rapana venosa (Valenciennes, 1846) in the 1940s took a free ecological niche terminal predator in benthic communities of the Black Sea shelf and has become an important element of the ecosystem. The ability of rapa whelk to have a devastating impact on the biocenosis filter feeders determines the necessity of constant monitoring of this species populations’ state. The study of rapa whelk showed that the ecological role of this species is not limited to predation. Fairly large shell R. venosa is a solid substrate for alga, attached and restrictedly movable (sedentary) benthic animal organisms, among which mobile free-living forms sometimes find shelter. The aim of the work is to describe specific complex of epibiotic organisms formed on rapa-whelk shells, which is regarded as a consortium, where of R. venosa is the core. To study the consort community of R. venosa a sampling was made in 7 regions of the northern part of the Black Sea: 1 – Mamaia beach, Romania, 2 – the north-western part of the Black Sea (NWBS), Crimean sector, 3 – Sevastopol, 4 – Alupka, 5 – Yalta – Alushta, 6 – Karadag, 7 – the Kerch Strait. The sampling in the coastal zone (less then 15 m depth) was carried out by SCUBA and snorkel diving, deeper (up to 40 m) was used “Ocean-50”grab corer was used. Totally of 856 specimens of R. venosa were collected and analyzed. The main bulk of the material in the amount of 750 specimens of R. venosa was sampled in the coastal zone in Sevastopol vicinity (south-western Crimea) at the depth range of 1.5–10.0 m. The collection of the rapa whelk specimens was carried out totally and each specimen was placed in a separate plastic bag indicating the collection area, depth and biotope. Along with the mollusks sampling, visual observations and photographic fixation of hydrobionts in situ were carried out. Based on the research results the taxonomic list of rapa whelk epibiotic organisms was extended and for the first time the taxonomic composition of the mobile forms permanently or temporarily present in the R. venosa consortium was given. The first part of the investigation provides a list of rapa whelk epibionts taxa relating to four (Porifera, Cnidaria, Bryozoa, Chordata) of the seven detected Phyla with indication of sampling depths and bottom type and comments on the frequency of occurrence, the quantity and of their interaction with the consortium core. Phylum Porifera is represented by 1, Bryozoa – 3 Cnidaria – 2 and Chordata – 4 species. The drilling sponge Pione vastifica was found in all the investigated areas, except region 2 (NWBS), with a frequency of 20 to 90 % and the shell surface area damage was up to 100 % (average 30–35 %). Not numerous representatives of Cnidaria were found singly in the region 3 (Actinia equina) and in the region 5 (Diadumene lineata). Bryozoans are the most common group of animal-consorts of rapa whelk present in all the areas of our research. The frequency of their occurrence ranged from 10 to 100 %, the covering area of the shell surface was from 0 to 85 %. More than 90 % of the total surface area of rapana shell cover with bryozoans and their occurrence is in Cryptosula pallasiana. The second bryozoans’ species on development indices is Conopeum seurati, which was found in areas 3, 6 and 7, where the occurrence was up to 30 % and the coverage was up to 25 %. The other 3 species of bryozoans (Schizomavella auriculata, Bowerbankia imbricata, Hippothoa sp.) were found rarely. Representatives of Chordata – 2 species of ascidians (Botryllus schlosseri, Ciona intestinalis) and 3 species of fish (Diplecogaster bimaculata, Parablennius tentacularis, Scorpaena porcus) were recorded singly in regions 2, 3, 5. For the four Phyla of animal organisms considered the consorts list of R. venosa of the sandy bottom biotopes (10 species) is twice more numerous than that of the rocky eco-form (5 species). The organisms studied are of a different degree and nature of relations with the core consortium from commensalism to parasitism. Generalized information on periphyton and total coverage of rapa whelk shells with epibiotic complex is given. The results of the work show that in the Black Sea R. venosa has become an important element of the ecosystem, increasing biological diversity of the bottom fauna due to the formation of its own consortium complexes of epibiontic organisms.

The new Black Sea Reanalysis System within CMEMS

2021 ◽  
Author(s):  
Leonardo Lima ◽  
Stefania Angela Ciliberti ◽  
Ali Aydogdu ◽  
Romain Escudier ◽  
Simona Masina ◽  
...  
Keyword(s):  
Data Assimilation ◽  
Sea Level ◽  
Black Sea ◽  
General Circulation ◽  
Circulation Model ◽  
Sea Surface Height ◽  
Sea Surface ◽  
The Black Sea ◽  
Freshwater Flux ◽  
Sea Level Anomaly

<p>Ocean reanalyses are becoming increasingly important to reconstruct and provide an overview of the ocean state from the past to the present-day. These products require advanced scientific methods and techniques to produce a more accurate ocean representation. In the scope of the Copernicus Marine Environment Monitoring Service (CMEMS), a new Black Sea (BS) reanalysis, BS-REA (BSE3R1 system), has been produced by using an advanced variational data assimilation method to combine the best available observations with a state-of-the-art ocean general circulation model. The hydrodynamical model is based on Nucleus for European Modeling of the Ocean (NEMO, v3.6), implemented for the BS domain with horizontal resolution of 1/27° x 1/36°, and 31 unevenly distributed vertical levels. NEMO is forced by atmospheric surface fluxes computed via bulk formulation and forced by ECMWF ERA5 atmospheric reanalysis product. At the surface, the model temperature is relaxed to daily objective analysis fields of sea surface temperature from CMEMS SST TAC. The exchange with Mediterranean Sea is simulated through relaxation of the temperature and salinity near Bosporus toward a monthly climatology computed from a high-resolution multi-year simulation, and the barotropic Bosporus Strait transport is corrected to balance the variations of the freshwater flux and the sea surface height measured by multi-satellite altimetry observations. A 3D-Var ocean data assimilation scheme (OceanVar) is used to assimilate sea level anomaly along-track observations from CMEMS SL TAC and available in situ vertical profiles of temperature and salinity from both SeaDataNet and CMEMS INS TAC products. Comparisons against the previous Black Sea reanalysis (BSE2R2 system) show important improvements for temperature and salinity, such that errors have significantly decreased (about 50%). Temperature fields present a continuous warming in the layer between 25-150 m, within which there is the presence of the Black Sea Cold Intermediate Layer (CIL). SST exhibits a positive bias and relatively higher root mean square error (RMSE) values are present in the summer season. Spatial maps of sea level anomaly reveal the largest RMSE close to the shelf areas, which are related to the mesoscale activity along the Rim current. The BS-REA catalogue includes daily and monthly means for 3D temperature, salinity, and currents and 2D sea surface height, bottom temperature, mixed layer fields, from Jan 1993 to Dec 2019.  The BSE3R1 system has produced very accurate estimates which makes it very suitable for assessing more realistic climate trends and indicators for important ocean properties.</p>

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