1. Assistant Professor, School of Environment, Beijing Normal Univ., Beijing, 100875, P.R. China.
2. Postdoctoral Associate, St. Anthony Falls Laboratory, Univ. of Minnesota, Minneapolis, MN 55414.
3. Research Engineer, Dept. of Civil and Environmental Engineering, Univ. of California, Los Angeles, Los Angeles, CA 90095-1593.
4. Associate Director, Center for Environmental and Water Resources Engineering, Dept. of Civil and Environmental Engineering, Univ. of California, Davis, Davis, CA 95616.
5. Distinguished Professor, Dept. of Civil and Environmental Engineering, Univ. of California, Los Angeles, Los Angeles, CA 90095-1593.