1. Associate Member, ASCE
2. Sr. Lect. in Fluid Mech., School of the Built Envir., Napier Univ., Edinburgh, EH10 5DT, Scotland, U.K. E-mail: p.addison@napier.ac.uk
3. Res. Student, School of the Built Envir., Napier Univ., Edinburgh, EH10 5DT, Scotland, U.K. E-mail: k.murray@napier.ac.uk
4. Res. Asst., School of the Built Envir., Napier Univ., Edinburgh, EH10 5DT, Scotland, U.K.