1. Dr.-Ing., Research Engineer, Department Hydraulic Engineering in Inland Areas, Federal Waterways Engineering and Research Institute, Kussmaulstr. 17, Karlsruhe D-76187, Germany
2. M. Sc., Research Engineer, Department Hydraulic Engineering in Inland Areas, Federal Waterways Engineering and Research Institute, Kussmaulstr. 17, Karlsruhe D-76187, Germany
3. M. Eng., Research Engineer, Department Hydraulic Engineering in Inland Areas, Federal Waterways Engineering and Research Institute, Kussmaulstr. 17, Karlsruhe D-76187, Germany