1. Lecturer, Dept. of Dams and Water Resources Engineering, Univ. of Mosul, Mosul 41002, Iraq (corresponding author).
2. Associate Professor, Dept. of Civil Engineering, Faculty of Engineering, Universiti Putra Malaysia, Selangor 43400, Malaysia.
3. Professor, Dept. of Water Resources Engineering, Univ. of Baghdad, Baghdad 10071, Iraq.
4. Professor, River Engineering and Urban Drainage Research Centre, Universiti Sains Malaysia, Engineering Campus, Penang 14300, Malaysia.
5. Senior Lecturer, Dept. of Civil Engineering, Faculty of Engineering, Universiti Putra Malaysia, Selangor 43400, Malaysia.