1. Ph.D. Student, Discipline of Civil Engineering, College of Science and Engineering, James Cook Univ., Townsville, QLD 4811, Australia (corresponding author).
2. Senior Lecturer, Discipline of Civil Engineering, College of Science and Engineering, James Cook Univ., Townsville, QLD 4811, Australia; Cooperative Research Centre for Remediation and Assessment of the Environment (CRC-CARE), Univ. of Newcastle, Callaghan, NSW 2308, Australia.