1. Formerly, Research Assistant, V.T. Chow Hydrosystems Lab, Dept. of Civil and Environmental Engineering, Univ. of Illinois at Urbana-Champaign, 205/301 North Mathews Ave., Urbana, IL 60181.
2. Deceased December 23, 2001; formerly, Professor, V.T. Chow Hydrosystems Lab, Dept. of Civil and Environmental Engineering, Univ. of Illinois at Urbana-Champaign, 205/301 North Mathews Ave., Urbana, IL 61801.