Abstract
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 oscillations of the velocity and concentration series can occur at both low and at high frequencies in a wide range of passing waves. In a narrow spectrum, synchronous oscillations dominate in the region of the main energy-carrying frequency. It is also shown that the geometric shape of wave groups has a direct impact on the resuspension intensity. In groups of waves with a symmetrical profile, the suspension is more intense compared to groups with pronounced spatial asymmetry. In the groups of waves with a symmetrical profile, the bottom sediments are suspended more intensely than in groups with pronounced spatial asymmetry.
Similar content being viewed by others
REFERENCES
B. V. Divinsky, R. D. Kos’yan, and J. Gruene, “Influence of the wave spectrum form on the bottom sediment dynamics,” Oceanology (Engl. Transl.) 54, 132–143 (2014).
R. D. Kosyan and N. V. Pykhov, Hydrogenic Transfer of Sediments in the Coastal Zone of the Sea (Nauka, Moscow, 1991) [in Russian].
B. V. Divinsky, “Results of wave measurements around Gelendzhik,” in Dynamic Processes of a Coastal Zone, Ed. by R. D. Kosyan, (Nauchnyi Mir, Moscow, 2003), pp. 70–91.
C. Dohmen-Janssen and D. Hanes, “Sheet flow and suspended sediment due to wave groups in a large wave flume,” Cont. Shelf Res. 25, 333–347 (2005). https://doi.org/10.1016/j.csr.2004.10.009
J. Grüne, R. Kos’yan, H. Oumeraci, and I. Podymov, “Large-scale laboratory modeling of suspended sand concentration fluctuations under irregular waves,” in Proceedings of 6th International Symposium on Coastal Engineering and Science of Coastal Sediment Processes, “Coastal Sediments'07,” New Orleans (American Society of Civil Engineers, Reston, 2007).
K. Hasselmann and D. Olbers, “Measurements of wind-wave growth and swell decay during the Joint North Sea Wave Project (JONSWAP),” Ergänzung Deutsch. Hydrogr. Z., A, 8 (12), 1–95 (1973).
R. Kos’yan, J. Grune, B. Divinskiy, et al., “The dependence of suspended sand concentration on the degree of storm development,” in Proceedings of the 32nd International Conference on Coastal Engineering ICCE 2010, June 30–July 5, 2010, Shanghai, China (Chinese Ocean Engineering Society, Shanghai, 2010).
R. Kos’yan, H. Kunz, S. Kuznetsov, et al., “Physical regularities of suspended sand concentration and transport under irregular waves based on field data,” Die Kuste 64, 161–200 (1999).
R. Murray, D. Hodgson, and P. Thorne, “Wave groups and sediment resuspension processes over evolving sandy bedforms,” Cont. Shelf Res. 46, 16–30 (2012). https://doi.org/10.1016/j.csr.2012.02.011
C. E. Vincent and D. Hanes, “The accumulation and decay of near-bed suspended sand concentration due to waves and wave gropes,” Cont. Shelf Res. 22, 1987–2000 (2002).
J. J. Williams, C. P. Rose, and P. D. Thorne, “Role of wave groups in resuspension of sandy sediments,” Mar. Geol. 183, 17–29 (2002).
Funding
The task was set up as part of program no. 0149-2019-0014; analysis of experimental data, mathematical modeling, and their computation were supported by the Russian Foundation for Basic Research (project nos. 18-05-80 035 and 17-05-00183).
Author information
Authors and Affiliations
Corresponding authors
Additional information
Transated by G. Karabashev
Rights and permissions
About this article
Cite this article
Divinsky, B.V., Kosyan, R.D. Bottom Sediment Suspension under Irregular Surface Wave Conditions. Oceanology 59, 482–490 (2019). https://doi.org/10.1134/S0001437019040039
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S0001437019040039