Relationships between coastal processes and properties of the nearshore sea bed dynamic layer

• Autorzy: Ostrowski R. , Pruszak Z.
• Języki publikacji: EN

Abstrakty

EN

The paper discusses the notion of a layer of sandy sediments overlying a substratum of cohesive deposits in the coastal zone. This layer of sand is generally more mobile and is therefore conventionally referred to as the dynamic layer. Its parameters are important to coastal lithodynamic and morphodynamic processes caused by waves and currents. On the other hand, the dynamic layer is formed by nearshore hydrodynamic impact. The variability of the features of the dynamic layer on the southern Baltic dune and cliff shores in Poland is analysed on the basis of selected geological data supported by local seismo-acoustic field investigations. It appears that the conventional notion of the dynamic layer makes sense only in specific geomorphologic conditions. In such cases, mostly related to cliff shores, theoretical modelling of sediment transport should take the properties of the dynamic layer into account.

Słowa kluczowe

EN

dynamic layer; sandy sediments; multi-bar shore; southern Baltic coast

• Wydawca: Polish Academy of Sciences, Institute of Oceanology ; Elsevier
• Czasopismo: Oceanologia
• Rocznik: 2011
• Tom: No. 53 (3)
• Strony: 861--880
• Opis fizyczny: Bibliogr. 20 poz., fot., wykr.

Twórcy

autor

Ostrowski R.

autor

Pruszak Z.

• Institute of Hydro-Engineering, Polish Academy of Sciences (IBW PAN), Kościerska 7, Gdańsk 80-328, Poland,

Bibliografia

• 1.Boldyrev W. L., 1991, Morphological and lithologic indicators of development regions of longshore sandy sediment fluxes, Inż. Mor. Geotech., 2, 50-53, (in Polish).
• 2.Ciavola P., Tarborda R., Ferreira O., Dias J., 1997, Field observations of sand-mixing depths on steep beaches, Mar. Geol., 141 (1-4), 147-156.
• 3.Frankowski Z., Graniczny M., Juszkiewicz-Bednarczyk B., Kramarska R., Pruszak Z., Przezdziecki P., Szmytkiewicz M., Werno M., Zachowicz J., 2009, Principles of documentation of geological-engineering foundation conditions for marine structures and coastal protection measures, Polish Geol. Inst., Warsaw, 201 pp., (in Polish).
• 4.Kaczmarek L.M., 1999, Moveable sea bed boundary layer and mechanics of sediment transport, IBW PAN, Gdańsk, 209 pp.
• 5.Kraus N.C., 1985, Field experiments on vertical mixing of sand in the surf zone, J. Sediment. Petrol., 55 (1), 3-14.
• 6.Mielczarski A., 2006, Remarks on notional models of sediment motion in the underwater part of the coastal zone, Inż. Mor. Geotech., 1, 13-22, (in Polish).
• 7.Mojski J.E., 1979, Detailed geological map of Poland on 1:50 000 scale, Sheet - Gdańsk, Wyd. Geol., Warsaw, (in Polish).
• 8.Myrhaug D., Holmedal L.E., 2007, Mobile layer thickness in sheet flow beneath random waves, Coast. Eng., 54 (8), 577-585.
• 9.Ostrowski R., 2004, Morphodynamics of a multi-bar coastal zone, IBW PAN, Gdańsk, 163 pp.
• 10.Pruszak Z., 1998, Dynamics of beach and seabed, IBW PAN, Gdańsk, 463 pp., (in Polish).
• 11.Pruszak Z., 2003, Marine basins. Outline of physical processes and environmental engineering, IBW PAN, Gdańsk, 272 pp., (in Polish).
• 12.Pruszak Z., Różyński G., Szmytkiewicz M., Skaja M., 1999, Quasi seasonal morphological shore evolution response to variable wave climate, Proc. 4th Int. Symp. Coast. Eng. Sci. Coast. Sediment, ASCE, 1081-1093.
• 13.Pruszak Z., Zeidler R.B., 1995, Sediment transport in various time scales, Proc. 24th Int. Conf. Coast. Eng., Vol. 1, ASCE, 2513-2526.
• 14.Racinowski R., Baraniecki J., 1990, Usefullness of lithologic indicators in description of the longshore sediment flux on the Polish Baltic shore, Rozpr. Hydrotech., 51, 159-210, (in Polish).
• 15.Saini S., Jackson N., Nordstrom H., 2009, Depth of activation on a mixed sediment beach, Coast. Eng., 56 (7), 788-791.
• 16.Sherman D., Nordstrom K. F., Jackson N., Allen J., 1994, Sediment mixing depth on low energy reflective beach, J. Coastal Res., 10, 297-305.
• 17.Subotowicz W., 1996, A need of new look at classification of the coastal zone, Inż. Mor. Geotech., 5, 332-335, (in Polish).
• 18.Subotowicz W., 2005, Lithodynamic determinants of shore protection in Poland, Inż. Mor. Geotech., 3, 190-194.
• 19.Sunamura T., Kraus N.C., 1985, Prediction of wave average mixing depth in the surf zone, Mar. Geol., 62 (1), 1-12.
• 20.Uścinowicz Sz., Zachowicz J., Przezdziecki P., Zaleszkiewicz L., 2007, Geodynamic map of the Polish south Baltic coastal zone, Sheet - Lubiatowo, No. 34, Marine Geol. Dept., Polish Geol. Inst., Gdańsk, (in Polish).