Stability of Hardly Reshaping Berm Breakwaters

Stability of berm breakwaters has been dealt with by several authors like Van der Meer (1992) and Lykke Andersen & Burcharth (2010). The work of Van der Meer (1992) gives a very good estimate of the full reshaped profile for dynamically stable structures with a stability number Hs/ΔDn50 > 3 . However, berm breakwaters have in recent years mainly been designed as statically stable fully reshaping, or as partly and hardly reshaped breakwaters. Lykke Andersen and Burcharth (2010) and others have presented formulae to calculate the berm recession (Rec) which is an important damage parameter for reshaping berm breakwaters. The Lykke Andersen formula is a semi-empirical formula leading to a quite large application area regarding water depth and initial front slope compared to the other empirical formulae.Stability of berm breakwaters has been dealt with by several authors like Van der Meer (1992) and Lykke Andersen & Burcharth (2010). The work of Van der Meer (1992) gives a very good estimate of the full reshaped profile for dynamically stable structures with a stability number Hs/ΔDn50 > 3 . However, berm breakwaters have in recent years mainly been designed as statically stable fully reshaping, or as partly and hardly reshaped breakwaters. Lykke Andersen and Burcharth (2010) and others have presented formulae to calculate the berm recession (Rec) which is an important damage parameter for reshaping berm breakwaters. The Lykke Andersen formula is a semi-empirical formula leading to a quite large application area regarding water depth and initial front slope compared to the other empirical formulae