1. PhD Candidate, Dept. of Civil and Environmental Engineering, Univ. of California, Los Angeles, CA 90095-1593.
2. Research Engineer, Dept. of Civil and Environmental Engineering, Univ. of California, Los Angeles, CA 90095-1593.
3. Associate Director, Center for Environmental and Water Resources Engineering, Dept. of Civil and Environmental Engineering, Univ. of California, Davis, CA 95616.
4. Professor, Dept. of Civil and Environmental Engineering, Univ. of California, Los Angeles, CA 90095-1593 (corresponding author). E-mail: stenstro@seas.ucla.edu