1. Fellow, ASCE
2. Visiting Assoc. Prof., Dept. of Civ. and Envir. Engrg., Louisiana State Univ., Baton Rouge, LA 70803-6405.
3. Arthur K. Barton Prof., Dept. of Civ. and Envir. Engrg., Louisiana State Univ., Baton Rouge, LA 70803-6405.
4. Prof., Dept. of Water Resour. Engrg., Lund Univ., Box 118, S-22100 Lund, Sweden.