1. Assistant Professor, Marine and Environmental Sciences Center (MARE), Dept. of Civil Engineering, Univ. of Coimbra, Rua Luís Reis Santos, 3030-788 Coimbra, Portugal (corresponding author).
2. Full Professor, Marine and Environmental Sciences Center (MARE), Dept. of Civil Engineering, Univ. of Coimbra, Rua Luís Reis Santos, 3030-788 Coimbra, Portugal.