Boris Divinsky

P.P. Shirshov Institute of Oceanology · Lithodynamics

Term “spits of the Azov type” is encountered in the description of morphological features of sandy accumulative forms of sea coasts. This term is related to a system of several parallel spits in the form of narrow strips extended into the open sea over a few kilometers and formed under the influence of wind waves with acute incidence angles to the...

The main purpose of the study is an analysis of the wave climate of Novorossiysk Bay (Black Sea) for 1979–2019. The analysis is based on mathematical modeling results obtained with the modern DHI MIKE 21 SW spectral wave model. The wave model was verified using numerous instrumental data of the wind-wave parameters in the Black Sea and Sea of Azov....

The article presents information on the current experiment of research on wind wave parameters in the Black Sea coastal zone. Two wave-meter devices are the part of the measuring equipment of the Black Sea testing site Gelendzhik of the Shirshov Institute of Oceanology (IO RAS). The integral characteristics of wind waves accumulated and obtained in...

This paper presents the results of an analysis of the climatic fields of currents in the Sea of Azov, significant wave heights, and the power of the components of surface waves (purely wind waves and swell). This study was based on the methods of mathematical modeling using modern hydrodynamic and spectral wave models, taking into account the ice c...

urpose. The paper is aimed at studying the morphodynamic features of the Bakalskaya Spit evolution being influenced by the sea wind waves and swell, namely assessment of inter-annual variations in the alluvial (erosion) areas of the Bakalskaya Spit coastline, analysis of inter-annual variability of the wind wave parameters, determination of the sur...

Purpose. The paper is aimed at studying the morphodynamic features of the Bakalskaya Spit evolution being influenced by the sea wind waves and swell, namely assessment of inter-annual variations in the alluvial (erosion) areas of the Bakalskaya Spit coastline, analysis of inter-annual variability of the wind wave parameters, determination of the su...

Due to the development of measuring instruments, a more detailed analysis of the wave field and the field of suspended sediments spatio-temporal characteristics has become possible. Through the efforts of Russian specialists over the past decades: A unique database of observations of the sediment movement in storm situations in different physical a...

Forecasting the coastal zone development under possible climatic changes and technogenic impact is an extremely important task. This forecasting is based on our understanding of the mechanism of the hydrodynamic processes impact on the coastal zone. The goal of this work is to describe the hydrodynamic conditions (currents, sea level, surface waves...

Цель. Цель работы-исследование климатических тенденций в колебаниях среднегодовых и среднемесячных полей значительных высот волн смешанного волнения, ветрового волнения, зыби, а также скоростей ветра по всей акватории Черного моря. Методы и результаты. На основе численных расчетов модели MIKE 21 SW получены поля значительных высот волн смешанного в...

Purpose. The paper is aimed at studying climatic trends in variability of the average annual and average monthly fields of significant wave heights of the mixed and wind waves, swell and the wind speeds in the Black Sea region. Methods and Results. Based on the MIKE 21 SW numerical model, the significant wave heights’ fields of the mixed and wind w...

Purpose. The paper is aimed at studying climatic trends in variability of the average annual and average monthly fields of significant wave heights of the mixed and wind seas, swell and the wind speeds in the Black Sea region. Methods and Results. Based on the MIKE 21 SW numerical model, the significant wave heights’ fields of the mixed and wind s...

Dataset of mean wave parameters registered every 30 min by spotter wave buoy (https://www.sofarocean.com/products/spotter) installed in Black Sea region near Gelendzhik city (Russia) on water depth about 80 m and about 4 nautical miles from the shore (LAT 44.510 LON 37.970). The buoy was installed at 23 July 2020 in the frame of integrated coastal-...

In this paper, a comparison of the wind waves parameters calculations in the Black and Azov seas, using two common spectral wave models: DHI MIKE 21 SW and SWAN was made. The fields of the wind waves main parameters (wave heights, periods, directions of propagation) were obtained for a climatic period of time from 1979 to 2018. Comparison of the ca...

The purpose of this work was to analyze the influence of climatic variability of wind waves and swell parameters in the coastal zone on the sediment transport and to assess the contribution of the swell to the formation of alongshore fluxes. The object of research is the Anapa bay-bar (the Black Sea). Mathematical modeling has shown that in the Ana...

The paper is devoted to the study of the of the maximum mutual energy influence of the irregular surface wave spectrum shape on the bottom sediment suspension. Features of the energy frequency distribution of synchronous fluctuations of the series of water flow velocity and concentration of suspended particles are analyzed. It is shown, that in a w...

Results of the analysis of a long-term data set, including fields of significant wave heights of the surface wave components, and mixed (total) wave field in the Black Sea are presented. The data set was collected on the basis of retrospective calculations using the MIKE 21 SW spectral wave model with the atmospheric forcing based on the ERA-Interi...

The authors study how the spectral shape of irregular surface waves affects the bottom sediment suspension. The features of the frequency distribution of the energy of synchronous fluctuations of water flow velocity series and the concentration of suspended particles are analyzed. It is shown that the maximum mutual energy of synchronous oscillatio...

The paper presents preliminary results of monitoring the population of the bivalve Chamelea gallina, which is the main source of biogenic carbonates for the Anapa bay bar beaches (the Black Sea). It is shown that by 2017, the biomass of the clams decreased more than twice compared to 2010, but began to increase in 2018. The average sizes of C. gall...

Sandy beaches of the Russian Black Sea coast, Anapa bay-bar, represent the huge value as a recreational zone and as a unique natural complex. In this paper, the results of field researches in southern part of Anapa bay-bar are presented. The quantitative characteristics of lithodynamic processes are received, the estimation of possible influence of...

Analysis of the influence of wave energy frequency distribution on the dynamics of suspension over the sea-bottom is the main objective of this study. We revealed the differences between the response of the eroded sea-bottom to external disturbances represented by irregular surface waves with permanent integral characteristics (significant wave hei...

Acoustic methods belong to contactless measurement means, possess high spatial and time resolution. Thus, the use of multifrequency allows directly profile both concentration and granulometric structure of the suspended substances. In 2008 in the Big Wave Flume (Hanover, Germany) by efforts of the Russian and German scientists there have been carri...

The main goal of the present paper is to assess climatic features of the wind wave and swell distribution in the coastal zone of the Crimean Peninsula. Method of research is the mathematical modeling. The modern spectral wave model DHI MIKE 21 SW is used. The model was preliminary calibrated for the purpose of correct dividing the mixed surface wav...

The history of human civilization is directly linked to the social and technological state of the access to the sea, which ensured two very important aspects of the activity: trade and access to resources. On the other hand, the economic development of the shoreline depends on the protection from adverse natural processes such as storm waves or sed...

The main objective of our work is to estimate the climatic peculiarities of the distribution of wind sea and swell in the Black Sea. The method of our research is numerical modeling. We tuned the spectral wave model DHI MIKE 21 SW for automatic separation of the components of surface waves. We estimated the peculiarities of the spatial distribution...

The main goal of this research is to study the storm activity in the Anapa bay bar area in the period from 1979 to 2015. We used the method of mathematical modeling. We found that in the region of Anapa bay bar, average annual power of wind waves is 4-5 kW/m and varies significantly during the year. In the wind rose of waves, there are two prevaili...

The paper discusses mathematical simulation of intensive coastal upwelling observed in the northeastern part of the Black Sea in the water area of the hydrophysical test site of the Shirshov Institute of Oceanology, Russian Academy of Sciences, in September 2013. The simulation was carried out with the MIKE 21/3 Coupled Model FM combined hydrodynam...

Based on numerical modelling evolution of beach under waves with height 1,0-1,5 m and period 7,5 and 10,6 sec as well as spectral wave parameters varying cross-shore analysed. The beach reformation of coastal zone relief is spatially uneven. It is established that upper part of underwater beach profile become terraced and width of the terrace is in...

On the base of experimental data it was revealed that type of wave breaking depends on wave asymmetry against the vertical axis at wave breaking point. The asymmetry of waves is defined by spectral structure of waves: by the ratio between amplitudes of first and second nonlinear harmonics and by phase shift between them. The relative position of no...

The main objective of this paper is an analysis of the impact of the frequency distribution of wave energy on the dynamics of bottom sediment suspension as well as a study of the features of bottom sediments suspension during the passage of waves groups of varying shape and intensity. It is shown that the concentration of wave energy in the primary...

Using data from laboratory, field, and numerical experiments, we investigated regularities in changes in the relative limit height of breaking waves (the breaking index) from peculiarities of nonlinear wave transformations and type of wave breaking. It is shown that the value of the breaking index depends on the relative part of the wave energy in...

The main objective of our work is analysis of spatiotemporal variability of the Black Sea wave climate from 1979 to 2015. The analysis is based on mathematical modeling using the modern DHI MIKE 21 SW spectral wave model. Verification of the wave model was performed using numerous data of instrumental observations of wind wave parameters in the Bla...

On the base of experimental data it was revealed that type of wave breaking depends on wave asymmetry against the vertical axis at wave breaking point. The asymmetry of waves is defined by spectral structure of waves: by the ratio between amplitudes of first and second nonlinear harmonics and by phase shift between them. The relative position of no...

The main objective of this paper is an analysis of the impact of the frequency distribution of wave energy on the dynamics of bottom sediment suspension as well as a study of the features of bottom sediments suspension during the passage of waves groups of varying shape and intensity. It is shown that the concentration of wave energy in the primary...

The main goal of this research is to study the storm activity in the Anapa bay bar area in the period from 1979 to 2015. We used the method of mathematical modeling. We found that in the region of Anapa bay bar, average annual power of wind waves is 4-5 kW/m and varies significantly during the year. In the wind rose of waves, there are two prevaili...

Based on numerical modelling evolution of beach under waves with height 1,0-1,5 m and period 7,5 and 10,6 sec as well as spectral wave parameters varying cross-shore analysed. The beach reformation of coastal zone relief is spatially uneven. It is established that upper part of underwater beach profile become terraced and width of the terrace is in...

The setting and adjustment of three-dimensional hydrodynamic models (regional and local) for the simulation of Black Sea dynamics and submesoscale variability (1–10 km, 10–102 h) of currents at the northeastern shelf are the main goal of the presented work. Preliminary simulation results are in good agreement with observations.

The main goal of this research is to study the storm activity in the Black and Azov seas in the period from 1990 to 2014. We used the method of mathematical modeling. The results allow us to conclude that in the last 25 years the annual mean power of wind waves increased by 10-15% mainly due to the intensification of the easterly component of the a...

In present study tendencies in change of a wave climate of the Black sea for last 25 years are analyzed. Wave parameters were carried out by using the spectral wave model SWAN and were validated with buoy measurements. The results of this study indicate growth of the average interannual wave power at 10–15 percent.

Анапская пересыпь – это обширное аккумулятивное песчаное тело, протяженностью почти 50 км, которое является уникальным природным образованием. Анапская пересыпь называется также Бугазско-Витязевская, Кизилтащско-Витязевская, Анапско-Таманская. Анапская пересыпь простирается узкой полосой от м. Анапский до озера Соленое. Она отделяет от Черного моря...

The ultimate purpose of sediment transport studies is the prediction of bottom relief in the zone of active wave effect accompanied by transport of significant sand volumes. The energetic longshore currents induced by the oblique wave approach, transport large amounts of sand lifted by waves from the sea bottom. This mass sediment transport and its...

This paper is dedicated to the investigation of the influence of the irregular wave spectrum form on the regularities of the bottom suspension and formation of the bottom topographic microforms (ripples). It is shown that the vertical profile of the suspended matter concentration and the possible partial deformation of the bottom ripples are relate...

В работе приводится обзор состояния процесса построения расчетных моделей штормового транспорта наносов вблизи берега.

The processes of the sediment fluxes formation in the coastal zone are extremely complicated and multifaceted. It is impossible to suggest universal method of sediment discharge, cinematic structure and sediment composition at a nowadays level of our knowledge. For solving of applied tasks, it is necessary to know clearly: what mechanisms of sedime...

An infragravity waves are long waves with periods of 20 - 300 s. Most essential influence of infragarvity waves on dynamic processes is in a coastal zone, where its energy can exceed the energy of wind waves. From practical point of view, the infragravity waves are important, firstly, due to their influence on sand transport processes in a coastal...

In the presentation the results of study have been presented. It was shown that the spectral steepness alters the SSC and, that the same wave parameters, different SSC values occur at different steepness.

На основе данных натурных экспериментов, полученных в штормовых условиях, анализируются особенности изменчивости вертикального профиля концентрации взвешенных песчаных наносов в береговой зоне с дискретностью меньшей, чем период волны.

Sandy beaches of the Russian Black Sea coast, Anapa bay-bar, represent the huge value as a recreational zone and as a unique natural complex. In this paper, the results of field researches in southern part of Anapa bay-bar are presented. The quantitative characteristics of lithodynamic processes are received, the estimation of possible influence of...

Based on the data of a field experiment in a storm environment, we examined the specific features of the variability of the vertical profiles of the concentration of suspended sand sediments at a discreteness shorter than the wave period. Physical mechanisms that determine the processes of suspension and shape the types of vertical distributions of...

The basic purpose of the present research is the establishment of connections between surface waves’ spectral characteristics and laws of the bottom material suspension. The basic method is the laboratory experiment that allows controlling the interconnected dynamic parameters of the water environment and processes of bottom deposits transport. It...

The model for prediction of time and space variations of suspended sand concentration over plane bed under waves with group structure is described. The convective sediment flux is described by formula based on the field and laboratory data. The sediment entrainment from the bottom is represented by a pickup function that takes into account the phas...

In the present article the results of observations for bottom deformations near submerged oil pipelines are presented. Hydrodynamic conditions of pipeline places are estimated, and also data on dynamic of scours for 3 years observation are cited.

Modeling of the vertical distribution of suspended sediments is limited by the absence of clear physical mechanisms of sediment suspension. The main difficulties of the modeling are discussed in this paper The most effective way in the modeling developing is the determination of relations between the suspended sediment concentration and turbulent k...

In 2008 an experiment was carried out in Hanover Large Wave Channel aimed to study regularities of bottom sediment suspending under irregular waves. 65 series of measurements were performed. Every series lasted for 20 minutes. A spectrum of initial waves was primordially was set as JONSWAP spectrum with assigned collection of parameters. Distributi...

Results of the modelling of the vertical distribution of suspended sediment concentration under the influence of waves with a pronounced group structure are presented in this paper. The reliability of the model has been checked against laboratory data from the SISTEX'99 experiment. Fluctuations of suspended sediment concentration, calculated by the...

Recently, the problem of the generation of anomalous high waves of unusual form on the ocean surface has been at the center of intense theoretical and applied work. The phenomenon of anomalously high waves (often called freak waves) is related to the sudden generation of intense waves that can be two or more times as high as the significant wave he...

Recently, the problem of the generation of anomalous high waves of unusual form on the ocean surface has been at the center of intense theoretical and applied work. The phenomenon of anomalously high waves (often called freak waves) is related to the sudden generation of intense waves that can be two or more times as high as the significant wave he...

Phenomenon of anomalous-high waves (waves-killers) consists in sudden formation of the intensive waves, superimposing a considerable height of swell by two and more times. The example of registration of the anomalous waves in the Black Sea is given. The analysis and numerical simulation of record enable to visualize a spatial dynamics of waves. It...

Литодинамические процессы в береговой зоне моря находятся под непосредственным влиянием прибрежных течений и ветрового волнения, причем вклад морского волнения является преоблада¬ющим. При решении прикладных задач гидротехнического строительства крайне нужны сведения о режиме ветрового волнения. Необходимые климатические характеристики делятся на д...

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The research is based on the long-term instrumental measurements of the waves in the northeastern part of the Black Sea. The correlation and spectral structure of the waves are studied. The statistical properties of steady-state conditions interpreted as "storms" and "weather windows" are investigated. A genetic classification by types of waves and...

Synoptic variability of sea waves on the long-term time series of wave height in Black and Baltic seas is investigated. The probability characteristics of general variability parameters, e.g. wave height in a storms and calms, storm and calm duration, are obtained. The approximation of joint distributions of storm and calm duration and wave heights...