1. Regional Habitat Engineer, Freshwater Institute, Winnipeg MB, Canada R3T 2N6 and Adjunct Professor, Univ. of Alberta, Edmonton AB, Canada T6G 2G7.
2. Associate Professor, Dept. of Civil Engineering, Ain Shams Univ., Cairo, Egypt.
3. Graduate Student, Dept. of Civil Engineering, Univ. of Alberta, Edmonton AB, Canada T6G 2G7.
4. Emeritus Professor, Dept. of Civil Engineering, Univ. of Alberta, Edmonton AB, Canada T6G 2G7.