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Further to Sarah's – pore water pressure caused on permeable shores by wave, tide and sea level rise (as a stress, aspects of it in Sea Level Rise – the Consequences and Adaptation) can be of interest. The rising and falling pore pressures are the causal factors – responsible for salt water intrusion into the aquifer, and dislodging/loosening of sedimentary bank materials to erosion. A method proposed by de Rouck J 1991 [De Stabilitet van Stortsteen Golfbrekers, Algemeen Glijdingsevenwicht - Een Nieuw Deklaagelement. Hydraulic Laboratory, University of Leuven, Belgium] is an excellent source in this regard.
Based on some works conducted quite a while ago – to illustrate the applicability of the method, I have attached two images as an example – one for wave and the other for tide.
Dr. Dilip K Barua, Ph.D, P.Eng, M.ASCE