Assessment and control of the amount of sediments lifted from the seabed by flow in a vortex well and the composition of bottom deposits on gravel-pebble beaches

by

A.E. Shchodo1, Yu.E. Shishkin1,2, D.A. Antonenkov3, A.N. Sorokin4, A.V. Gubarev1

1Institute of Natural and Technical Systems, RF, Sevastopol, Lenin St., 28

E-mail: ashodro@ya.ru

2Sevastopol State University, RF, Sevastopol, Universitetskaya St., 33

3Marine Hydrophysical Institute of the RAS, RF, Sevastopol, Kapitanskaya St., 2

4Sorokin Individual Enterprise

DOI: 10.33075/2220-5861-2024-4-83-93

UDC 532.54 

EDN: https://elibrary.ru/qlzwxz

Abstract:

A methodology for assessing the amount of sediment lifted from the seabed using a special device that creates a vortex flow with a vertical axis has been developed and demonstrated. This device brings sediments to the surface of the flow, where they can be washed ashore by subsequent waves. The device is designed to capture marine sediments carried by wave flows and lift them from the bottom. This approach addresses the tasks of reinforcing the shore against erosion by wave action, protecting beach areas, and restoring previously eroded beaches. The feasibility of constructing a chain of artificial islands and filling the spaces between them and the shore under the conditions of the western coast of Crimea is demonstrated. Additional structural characteristics of the vortex well are selected to increase the probability of capturing sediments from the bottom, and optimized values of their parameters are provided. Based on the data of several authors, considerations are made regarding the assessment of reformation of the bottom relief in the wave-breaking zone on the beach shoal under storm conditions in the presence of installed structures of the considered type with optimized parameters. Only preliminary hydraulic studies of the considered design have been conducted; however, they allowed outlining directions for its further improvement and calculation methods.

Keywords: marine sediments, vortex flow, shoreline reinforcement, beach protection, artificial islands, sediment capture, bottom relief, hydraulic studies.

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