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Abstract
The aim of the work is to describe the mechanisms controlling the sediment transportation at different stages of the storm cycle including three main phases, namely development, stabilization and attenuation. The resulting morphological effect of the considered storm depends presumably not only on its strength, but also on the relative duration of the destructive and recovery phases. Two full-scale experiments conducted on the Bulgarian coast in 2016 and 2018 provided materials on the shore profile dynamics under conditions of storm waves. It proved that the profile deformations usually considered to be seasonal may happen in the course of a single extreme event of once a year frequency. Field experiment data analysis proved the concept that long mild waves move sediments onshore (cause accumulative profile) and short steep waves create erosional profile with sandbar. In studied case waves steeper than 0.02 create sandbars and milder than 0.02 - transport sandbars onshore. It was observed that in some cases accumulative phase corresponds to decrease of the peak period while mean period stays unchanged, which indicates narrowing of the wave spectrum.References
Aleman N., Robin N., Barusseau J-P., Gervais M. 2013. Net offshore bar migration variability at a regional scale: Inter-site comparison (Languedoc-Roussillon, France). Journal of Coastal Research, Special Issue No. 65.
Dolotov Yu.S. 1989. Dynamic environments of the littoral relief formation and sedimentation. Moscow, Nauka Press, 269 pp. (In Russian)
Dolotov Yu.S., Zharomskis R.B., Kirlis V.I. 1982. Differentiation of sedimentary material and stratification of the coastal deposits. Moscow, Nauka Press, 184 pp. (In Russian)
Gervais M., Balouin Y., Certain R. 2013. The major control parameters of storm morphological evolution on a microtidal barred beach. In the proceeding book of the Coastal Dynamics, held in Arcachon, France in April 2013.
Goodfellow, B. W. and Stephenson, W. J. 2005. Beach morphodynamics in a strong-wind bay: a low energy environment. Marine Geology, 214, 101-116.
Guza R.T., Inman D.L., 1975. Edge waves and beach cusps, Journal of Geophisical Research, 80 (21):2997-3012
Inman D.L., Elwany H.S., Jenkins S.A. 1993. Shorerise and bar-berm profiles on ocean beaches // J. of Geophys. Res. V. 98. â,,– C10. P. 18181-18199.
Kaplin P.A., Leontyev O.K., Lukyanova S.A., Nikiforov L.G. 1991. Coasts. Mysl' Publ., Moscow. 479 p. (In Russian).
Keremedchiev, S., Trifonova E. 2003. Classification of Beach Profile Types Along the Bulgarian Black Sea Coast. Proc. of Institute of Oceanology, Vol. 4. pp. 83-98.
Larson M., Kraus N.C. 1989. SBEACH: numerical model for simulating storm-induced beach change. Tech. Rep. CERC-89-9, US Army Eng. Waterw. Exp. Station. Coastal Eng. Res. Center.
Longinov V.V. 1963. Coastal zone dynamics in tideless seas. Moscow, the USSR Academy of Sciences Publ. House, 379 pp. (In Russian)
Price T.D., Ruessink B.G., Castelle B. 2014. Morphological coupling in multiple sandbar systems - a review. Earth Surf. Dynam., 2, 309-321.
Russian Marine Register of Shipping. Reference data about wave and wind regime of Baltic Sea, North Sea, Black Sea, Azov Sea and Mediterranean Sea 2006.// St. Petersburg.
Shepard F.P. 1950. Beach cycles in southern California. Beach Erosion Board, Technical Memorandum 15, 32 pp.
Wright, L. D. and Short, A. D. 1984. Morphodynamic variability of surf zones and beaches: a synthesis. Marine Geology, 56, 93-118.
Yates M.L., Guza R.T., O'Reilly, W.C. & Seymour R.J. 2009. Overview of seasonal sand level changes on southern California beaches. Shore & Beach 77, 39-46.
Yurkevich M.G. 1977. General characteristics of the hydrodynamic conditions of heavy mineral deposition in the upper zone of shelf. In: Aksenov A.A. (Ed.). Processes of relief formation and sedimentation. Moscow, Nauka Press (In Russian)