1. Asst. Prof., Dept. of Civ. and Envir. Engrg., Albrook Hydr. Lab, Washington State Univ., Pullman, WA 99163-2910. E-mail: apapanic@wsu.edu
2. Prof., Dept. of Civ. and Envir. Engrg., Virginia Polytechnic Inst. and State Univ., Blacksburg, VA 24061.
3. Assoc. Prof., Dept. of Mech. Engrg., Virginia Polytechnic Inst. and State Univ., Blacksburg, VA.
4. Engr., Energy Applications, Columbia, MD 21045.