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    Wyświetlanie 1-4 z 4
    Tytuł:
    Hydrodynamics and Lithodynamics of Dissipative and Reflective Shores in View of Field Investigations
    Autorzy:
    Ostrowski, R.
    Pruszak, Z.
    Skaja, M.
    Szmytkiewicz, M.
    Trifonova, E.
    Keremedchiev, S.
    Andreeva, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/241380.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Instytut Budownictwa Wodnego PAN
    Tematy:
    cross-shore profile
    waves
    currents
    grain size distributions
    sediment transport
    Opis:
    The paper presents a comparative analysis of physical processes occurring at two different coasts, which belong to two different European seas. The first coast under examination comprises the sandy shore nearby Lubiatowo, located at the south Baltic Sea in Poland. The second site is represented by the sandy coast in Shkorpilovtsi, located at the west Black Sea in Bulgaria. Both sites are equipped with field research facilities ensuring extensive and precise in situ investigations. The study is focused on differences and similarities of hydro- and lithodynamics as well as the nearshore morphology between the above coastal zones. The present analysis is based on the results of the field campaigns carried out in recent years at the research facilities in Lubiatowo and Shkorpilovtsi. Considering the way in which wave energy transforms on the cross-shore profile, the sea shore at Lubiatowo is found distinctly dissipative while the shore at RB Shkorpilovtsi has a reflective character. This fact implies some differences in the features of wave-current motion and sediment transport.
    Źródło:
    Archives of Hydro-Engineering and Environmental Mechanics; 2010, 57, 3-4; 199-218
    1231-3726
    Pojawia się w:
    Archives of Hydro-Engineering and Environmental Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of Deans curve to investigation of a long-term evolution of the Southern Baltic multi-bar shore profile
    Autorzy:
    Cerkowniak, G.R.
    Ostrowski, R.
    Pruszak, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/48611.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    cross-shore profile
    Baltic Sea
    shoreline
    migration
    Dean's curve
    long-term evolution
    Lubiatowo
    Opis:
    The paper presents the results of studies on the long-term evolution of the multi-bar cross-shore profiles. The analysis is focused on time-dependent variability of shoreline position, a modified parameter A of the conventional Dean's equation and a parameter F describing the amount of nearshore sediment resources in the multi-bar cross-shore profile. The study also deals with interrelationships between these quantities. The analysis is carried out using field data collected at Lubiatowo, Poland, on the dissipative shore, representative for the south Baltic. The considered coastal segment is found to be stable in the long-term scale. The results of analysis show that the parameter A can either increase or decrease together with the shoreline advance. It is concluded that the shoreline position change is a parameter unsatisfactorily representative for behaviour of the seashore. The use of the Dean's approximation for estimation of the sediment resources F on the multi-bar seashore profiles is found reasonable to eliminate the effects of peculiarities of such shores.
    Źródło:
    Oceanologia; 2017, 59, 1
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Nearshore Mining Pits on Hydro- and Lithodynamics of a Dissipative Coastal Zone: Case Study of the Hel Peninsula (Poland)
    Autorzy:
    Ostrowski, R.
    Skaja, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/241297.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Instytut Budownictwa Wodnego PAN
    Tematy:
    cross-shore profile
    waves
    wave energy dissipation
    grain size
    bed shear stresses
    nearshore mining pits
    Opis:
    The paper deals with a sandy shore located on the open sea side of the Hel Peninsula in Poland (the south Baltic Sea coast). The study site displays a cross-shore profile that intensively dissipates wave energy, mostly due to breaking. The theoretical modelling of wave transformation at this site reveals specific distributions of wave heights and bed shear stresses. The sediment borrow areas, presently used and identified for future exploitation, are located inconveniently far from the periodically re-nourished shores. The paper presents the possibilities of dredging works in the coastal zone that would not disturb the natural nearshore motion of water and sediments. The results of the study can be helpful in formulating generic safety standards, at least with respect to dissipative shores of non-tidal or micro-tidal seas, like the Baltic Sea.
    Źródło:
    Archives of Hydro-Engineering and Environmental Mechanics; 2016, 63, 4; 237-252
    1231-3726
    Pojawia się w:
    Archives of Hydro-Engineering and Environmental Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A quasi phase-resolving model of net sand transport and short-term cross-shore profile evolution
    Autorzy:
    Ostrowski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/48565.pdf
    Data publikacji:
    2003
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    coastal zone
    hydrodynamics
    wave-current condition
    cross-shore profile
    Baltic Sea
    evolution
    modelling
    sand transport
    sediment transport
    hydrodynamic impact
    Opis:
    A way of modelling of the net sediment transport rate on a cross-shore profile and the resulting sea bed changes is presented. In the sediment transport computations, a three-layer model with a description of the bedload based on the water-soil mixture theory by Kaczmarek& Ostrowski (1998, 2002) is used. The modelling system is applied to wave-current conditions variable over the cross-shore profile, and determined using the computational frameworkof Szmytkiewicz (2002a, b). The sediment transport module incorporates the asymmetric wave approaches as proposed by Ostrowski (2002). Model simulations have been produced for uniformly sloped and multi-bar initial cross-shore profiles. Some of the model results are compared with the IBW PAN (Institute of Hydroengineering of the Polish Academy of Sciences) field data collected at the Coastal Research Station in Lubiatowo.
    Źródło:
    Oceanologia; 2003, 45, 2
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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