Shoreline re-formation by waves at transverse sediment-retaining structure

Conclusions

Of the features associated with the method used for preparing the numerical values of the initial data for computing the re-formation of a shoreline under full-scale conditions, the following should be noted:

• 1. The discharge of sediments in a littoral current was calculated by the formula of the State Institute of Mining Technology (IGM) of the Academy of Sciences of the Ukrainian SSR [4], which yields good results under both laboratory and full-scale conditionsQ=h ² λ/10⁴ m ^0.75(g/d)^0.5 sin 2θ. (20)

• 2. The typical underwater profiles of the shorelines comprising uncohesive soils, follow either a linear or parabolic law for depth variation. They were approximated by an exponential function of the type z(y)=k₁y_m+k₂, with appropriate values of the constants.

• 3. Coefficient k in Eq. (10) was adjusted by conducting numerical experiments (trial runs) and comparisons with measured data obtained from tested objects, the parameters involved covering a wide range.

• 4. The wave parameters used in the computations were those of a design storm equivalent, according to the results of their wave action to those of an average long-term storm year.

• 5. Serving as examples for comparing the computed results with the data from full-scale measurements, were actually existing structures on the shores of seas and oceans, having sufficiently long sets of observations [3, 7–9].