1. Fellow, ASCE
2. Res. Assoc., Franzius-Institut for Hydr., Wtrwy. and Coast. Engrg., Nienburger Str. 4, D-30167 Hannover, Germany.
3. Prof., Dr.-Ing., Dir., Franzius-Institut for Hydr., Wtrwy. and Coast. Engrg., Nienburger Str. 4, D-30167 Hannover, Germany.