THE MAIN PRINCIPLES OF BANK STABILISATION BY THE GROINS

Z. Prushak; R. Ostrovsky; A. N. Babakov; B. V. Chubarenko

doi:10.15356/0435-4281-2014-3-91-104

THE MAIN PRINCIPLES OF BANK STABILISATION BY THE GROINS

Z. Prushak, R. Ostrovsky, A. N. Babakov, B. V. Chubarenko

https://doi.org/10.15356/0435-4281-2014-3-91-104

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Abstract

The review of field investigations and simulation results led to the conclusion that efficiency of groins use depends on two main factors: amount of free sediments on the bottom slope and angle of wave approach to the shore. The positive effect of groins use can be achieved when angle of approach is acute and sufficient amount of free material is available. Groins are not effective without additional supply of loose sediments if waves have nearly normal approach to shore and there is a deficit of free sediments. An increase of effectiveness of groins could be obtained by varying of their length, spatial step, and orientation. A reduction of downstream erosion is achieved by shortening the groins and adjustment of their complex to the shoreline contour, beach nourishment at the downstream areas, and using of permeable (30–50%) groins.

Keywords

groin, shore protection, alongshore mass, angle of wave

About the Authors

Z. Prushak

Institute of Hydroengineering PAS, Gdansk
Poland

R. Ostrovsky

Institute of Hydroengineering PAS, Gdansk
Poland

A. N. Babakov

Atlantic Branch of Shirshov Institute of Oceanology RAS, Kaliningrad
Russian Federation

B. V. Chubarenko

Atlantic Branch of Shirshov Institute of Oceanology RAS, Kaliningrad
Russian Federation

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Review

For citations:

Prushak Z., Ostrovsky R., Babakov A.N., Chubarenko B.V. THE MAIN PRINCIPLES OF BANK STABILISATION BY THE GROINS. Geomorfologiya. 2014;(3):91-104. (In Russ.) https://doi.org/10.15356/0435-4281-2014-3-91-104