1. Institute of Marine Research–Marine and Environmental Research Centre, Dept. of Civil Engineering, Univ. of Algarve, Campus da Penha, 8005-139 Faro, Portugal (corresponding author).
2. Institute of Marine Research–Marine and Environmental Research Centre, Dept. of Civil Engineering, Univ. of Coimbra, Rua Luís Reis Santos, Campus II, 3030-788 Coimbra, Portugal.