1. Research Officer, National Civil Engineering Laboratory, DHA/NPE, Av. do Brasil, 101, 1700-066 Lisbon, Portugal (corresponding author). E-mail: gneves@lnec.pt
2. Research Officer, National Civil Engineering Laboratory, DHA/NPE, Av. do Brasil, 101, 1700-066 Lisbon, Portugal. E-mail: treis@lnec.pt
3. Professor, Ocean & Coastal Research Group, Instituto de Hidráulica Ambiental, “IH Cantabria,” Univ. de Cantabria, Avda. de los Castros s/n, Santander 39005, Spain. E-mail: losadai@unican.es
4. Manager of Numerical Modelling, Royal Haskoning, Burns House, Harlands Ro., Haywards Heath RH16 1PG, U.K. E-mail: k.hu@royalhaskoning.com