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1.
The method and results of the study of granulometric composition of sediments of the Anapa bay bar are presented in this work. Along the extension, the Anapa bay bar hosts several areas with distinct granulomentric composition of sediments. The coastal variability of the bottom sediments is less expressive relative to land sediments and the pattern of the coastal distribution of granulometric composition reflects the local differences of hydrolithodynamic conditions of individual areas of the bay bar. These data are important for understanding the present-day lithodynamic processes and evolution of the geosystem of the Anapa bay bar. 相似文献
2.
AbstractThe robustness of the physically-based, semi-distributed hydrological model ECOMAG with respect to changing (climatic or land-use) conditions was evaluated for two basins, considered within the modelling workshop held in the frame of the 2013 IAHS conference in Göteborg, Sweden. The first basin, the Garonne River basin, France, is characterized mostly by changes in climatic conditions, while the second, Obyån Creek, Sweden, was exposed to drastic land cover change due to deforestation. Tests were conducted to evaluate the model’s ability to simulate with acceptable accuracy the changing hydrological regime of each basin and to retain, in the process, relatively stable values of the parameters. Acceptable performance of the ECOMAG model was obtained under the different combinations of the calibration/evaluation periods, including, importantly, the periods of hydrological regime changes in both basins. 相似文献
3.
Krylenko I. Alabyan A. Aleksyuk A. Belikov V. Sazonov A. Zavyalova E. Pimanov I. Potryasaev S. Zelentsov V. 《Water Resources》2020,47(3):387-398
Water Resources - The article presents the results of adaptation and application of two-dimensional hydrodynamic model STREAM_2D to reproduce the characteristics of ice-jam-induced floods in the... 相似文献
4.
As a result of the field studies conducted in 2010 of the spatial and temporal variability of the granulometric composition
of the bottom and beach deposits of the southern part of the Anapa bay bar, the tendency of a decrease in the average size
of the particles under the southward flow of the deposits of the coastal zone was revealed. The comparison of the data obtained
in 1949, 1979, and 2010 shows that the average diameter of the particles in the deposits of the underwater slope also gradually
decreases over the time. It was established that, with the decreasing of the particle sizes down to 0.1 mm, their nonrecoverable
deposition to a depth of more than 7 m increases. Since, in the southern edge of the Anapa bay bar, over 70% of the bottom
and about 60% of the beach deposits are represented by fractions smaller 0.16 mm, at this site the mass deposition of the
sand material to a depth occurs. Based on the data obtained, the particle size of the sandy material recommended for the restoration
of the beaches of the southern part of the Anapa bay bar was determined. 相似文献
5.
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 sediments are considered.
A mathematical model for the prediction of vertical distributions of the suspended sediments governed by irregular wave forcing
is developed. The model is verified from data of field and laboratory experiments. 相似文献
6.
The consequences of extremely heavy rains in the coastal zone near Gelendzhik on July 6, 2012 are discussed with defining the sources of the solid material supply to the seashore, estimating their influence on the lithodynamic processes, and approximately calculating the volumes of the solid material that was transported by permanent and intermittent streams and provided by the coastal denudation. It is emphasized that the probability of such anomalous natural events should be taken into account when prognosticating the evolution of the seashore and estimating the balances of solid material. 相似文献
7.
Water Resources - The article presents the history, mathematical background, and a review of the current state of numerical simulation of the interaction dynamics between river water and seawater... 相似文献
8.
Constant seacoast changes represent a natural process for coastal geosystems; moreover, the extent of technogenically transformed coasts is constantly growing. It is impossible to create coastal economic development and conservation plans without understanding how environmental conditions and technogenic transformation affect coastal geosystems. Successful integrated use of the seacoast requires reliable information on the magnitude of observed and projected changes, the admissibility of anthropogenic changes to the coast, and adaption of economic activity to such possible changes. The paper discusses the basic principles for comprehensively assessing Russian coastal areas. A system of criteria is proposed to qualitatively assess the economic and environmental importance of individual coastal areas and their resistance to possible changes. These criteria are tested in some areas of Russia’s Azov–Black Sea coast. A preliminary assessment has shown that accumulative shores are the most dynamic and prone to natural hazards. 相似文献
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10.
Monitoring of Bashkara Glacier lakes (Central Caucasus, Russia) and modelling of their potential outburst 总被引：2，自引：1，他引：1
D. A. Petrakov O. V. Tutubalina A. A. Aleinikov S. S. Chernomorets S. G. Evans V. M. Kidyaeva I. N. Krylenko S. V. Norin M. S. Shakhmina I. B. Seynova 《Natural Hazards》2012,61(3):1293-1316
Glacier lakes pose threat to downstream settlements and infrastructure. In recent decades the number and area of lakes have
been growing at an accelerating rate due to worldwide glacier shrinkage. In the Russian Caucasus this process is understudied.
We present results obtained during a 12-year (1999–2010) continuous field monitoring of the Bashkara proglacial lakes group,
which we identified as the place with the highest GLOF risk in the region. Recession of the parent Bashkara Glacier was the
main driver of the rapid expansion of the lower Lake Lapa. The upper Lake Bashkara has not been enlarging, but its water level
has shown significant inter- and intra-annual fluctuations. The lake outburst probability has increased in recent years, and
in 2008 we observed surface overflow over the moraine dam. Taking into account that in the late 1950s lake outbursts at this
site led to large-scale glacial debris flows, we have simulated a potential outburst using River and FLO-2D software and carried
out hazard zonation. An early warning system has been designed and established at Lake Bashkara, and measures to mitigate
risk have been proposed. Rapid change of proglacial lakes requires regular monitoring in ‘hot spot’ areas where the GLOF hazard
is high and is dynamically changing. 相似文献