1. Prof., Hydr. Lab., Dept. of Civ. Engrg., Middle East Technical Univ., Ankara, 06531, Turkey.
2. MSc in CE, Yüksel-Rendel Joint Venture Co., P.O. Box 70, Bolu, Turkey.
3. PhD in CE, Res. Engrg., Hydr. Lab., Tech. Res. and Quality Control Dept., State Hydraulic Works, Yücetepe, Ankara 06100, Turkey.