1. Associate Member, ASCE
2. Assoc. Prof., Dept. of Civ. and Envir. Engrg., Univ. of Vermont, Burlington, VT 05405. E-mail: nhayden@emba.uvm.edu
3. Postdoctoral Assoc., Dept. of Envir. Engrg. Sci., Univ. of Florida, Gainesville, FL 32611-6450.
4. Assoc. Prof., Dept. of Envir. Engrg. Sci., Univ. of Florida, Gainesville, FL 32611-6450.