Chapter IV
Design of rubble mounds breakwater
56
The surf similarity parameterí µí» has often been used to describe the form of wave breaking on
abeach or structure. (Figure IV-2)
Figure IV-2 Breaker types as a function of the surf similarity parameter, ξ (Battjes, 1974).
The notional permeability (P) was empirically determined by Van der Meer for three different
standard situations, to be exact the P=0.1, P=0.5 and P=0.6. The fourth one with a filter layer and
a core is determined by interpolation of the tested configurations (P=0.4). The figure below
shows these four standard situations (Kik R. and al 2012).
Figure IV-3 Notional permeability factor P for the formulae by Van der Meer (1988b)
Design of rubble mounds breakwater
56
The surf similarity parameterí µí» has often been used to describe the form of wave breaking on
abeach or structure. (Figure IV-2)
Figure IV-2 Breaker types as a function of the surf similarity parameter, ξ (Battjes, 1974).
The notional permeability (P) was empirically determined by Van der Meer for three different
standard situations, to be exact the P=0.1, P=0.5 and P=0.6. The fourth one with a filter layer and
a core is determined by interpolation of the tested configurations (P=0.4). The figure below
shows these four standard situations (Kik R. and al 2012).
Figure IV-3 Notional permeability factor P for the formulae by Van der Meer (1988b)