1. Graduate Student, School of Civil and Environmental Engineering, Cornell Univ., Ithaca, NY, 14853-3501; and Research Associate, School of Civil and Environmental Engineering, The Univ. of Adelaide, Adelaide, S.A., 5005, Australia.
2. Senior Lecturer, Centre for Applied Modelling in Water Engineering, School of Civil and Environmental Engineering, The Univ. of Adelaide, Adelaide, S.A., 5005, Australia.
3. Associate Professor, Centre for Applied Modelling in Water Engineering, School of Civil and Environmental Engineering, The Univ. of Adelaide, S.A., 5005, Australia.
4. Associate Professor, Dept. of Civil Engineering, Univ. of British Columbia, Vancouver, B.C., Canada, V6T 1Z4.