1. Research Associate, 418 Durham Hall, Dept. of Civil and Environmental Engineering, Virginia Tech, Blacksburg, VA 24061-0246.
2. Water Project Manager, HDR Engineering, Inc., 1001 SW 5th Ave., Suite 1800, Portland, OR 97204; formerly, Watershed Manager, Bureau of Engineering Services, Dept. of Watershed Management, City of Atlanta, GA.
3. Senior Engineer, Jacobs Engineering Group, 6801 Governors Lake Pkwy., Norcross, GA 30071.
4. Charles E. Via Jr. Professor, 418 Durham Hall, Dept. of Civil and Environmental Engineering, Virginia Tech, Blacksburg, VA 24061-0246 (corresponding author).