## 4 Design Basis
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline  & & **Geometric** & **Armor Layer** & **Filter** & **Concrete** \\  & & **Characteristics** & & & **Superstructure** \\ \hline \multirow{6}{*}{**Rubble mound**} & \multirow{6}{*}{Lingosteira} & \multirow{6}{*}{Lingosteira} & Pieces: 150 ton & First filter: Rocks & \\  & & 3360 m & & Number of layers: & 15 ton & \\  & & & 2 & Thickness: 4.1 m & \\  & Punta & Head length: & & & 2 & \\  & Langosteira & 391 m & & & \\  & Water surface: & & & & \\  & & Water surface: & & & \\  & & & & Width: 2.35 m & \\  & & & Slope: 2:1 & & \\ \hline \multirow{6}{*}{**Torres**} & \multirow{6}{*}{Lingosteira} & \multirow{6}{*}{Lingosteira} & Pieces: 150 ton & First filter: Pieces & \\  & & & Number of layers: & 10 ton & \\  & & & 2 & Thickness: 3.3 m & \\  & & 1433 m & & & \\  & Water surface: & & & & \\  & & 145 ha & & Width: 20 m & Thickness 1.5 m & \\  & & Slope: 2:1 & & Slope: 2:1 & \\ \hline \multirow{6}{*}{**Punta Lucero**} & \multirow{6}{*}{Lingosteira} & \multirow{6}{*}{Lingosteira} & Pieces: 150 ton & \multirow{6}{*}{Lingosteira} & \multirow{6}{*}{Lingosteira} & \multirow{6}{*}{Lingosteira} \\  & & 2948 m & Number of layers: & & \\ \cline{1-1}  & Head length & 1–3 & First filter: Pieces 85 t & & \\ \cline{1-1}  & (by sections): & Crest elevation: & Thickness: 4.1 & & \\ \cline{1-1}  & & 540 m & +14 m & Slope: 1.65:1 & & \\ \cline{1-1}  & & 1510 m & Width: 8.37 m & & \\ \cline{1-1}  & & 373 m & Slope: 2:1 & & \\ \hline \multirow{6}{*}{**Vertical**} & \multirow{6}{*}{Norte} & \multirow{6}{*}{Lingosteira} & Number of & \multirow{6}{*}{Lingosteira} & \multirow{6}{*}{Lingosteira} \\  & & & & & \\ \cline{1-1}  & & Dike length: & Caissons: 33 & & \\ \cline{1-1}  & & 1700 m & Dimensions: 51.8 \(\times\) & & \\ \cline{1-1}  & & Water surface: & 32 \(\times\) 32 m & & \\ \cline{1-1}  & & 145 ha & Foundation level: & & \\ \cline{1-1}  & & & -24.75 m & Slope: 3.2 & \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Characteristics of the different breakwaters of study. Figure 5: Punta Langosteira, Torres and Norte and Punta Lucero breakwaters drawings (own elaboration). is higher than 0.04 g. Concluding, the basis seismic acceleration is low, and therefore, that aspect can be considered out of the design. Meteocean conditions are key parameters that have an influence on the development of the energy resource analysis and on the design of the structural facilities. Thus, it is essential to consider the average and extreme regime of waves, as the first one is needed for the energy analysis, and the second one for the structural design. Three Spanish State Port buoys in deep water (REDEXT buoys) and shallow water (REDCOT buoys) have been used for the meteocean analysis: (1) A Coruna port: Villano Sisargas REDEXT buoy (depth: 386 m, installation date in 1998) [11] and La Coruna REDCOST buoy (depth 50 m, installation date in 1982); (2) Gijon port: Cabo de Penas REDEXT buoy (depth 615 m, installation date in 1997) [12], and Gijon REDCOST buoy (depth 54 m, installation date in 2001); (3) Bilbao port: Bilbao-Vizcaya buoy (depth 600 m, installation date in 1990) [13], and Bilbao REDCOST buoy (depth 50 m, installation date in 2004). REDEXT buoys are located in deep waters, with h/L \(>\) 1/2, where h is the water depth in the buoy and L is the wave length. REDCOST are located in transitional waters, with 1/20 \(<\) h/L \(<\) 1/2 (see Figure 7). Figure 6: Map of Seismic Hazard in the Iberian Peninsula, Seismic Resistant Standard NCSE02. Regarding the extreme regime, Punta Langosteira counts with significant wave height 15 m, period wave period 20 s and medium wave period 16 s; Torres and Norte have significant wave height 9.5 m, period wave period 18 s and medium wave period 14.75 s; Punta Lucero counts with significant wave height 12.5 m, period wave period 18 s and medium wave period 13.85 s. Tides are semidiurnal, with ranges around 5 m in the three ports.