Document Type : Research Paper
1 PhD of Hydraulic Structure, Department of Water Sci. and Eng., Science and Research Branch, Islamic Azad University, Tehran, Iran..
2 Professor, Faculty of Water and Environmental Engineering, Shahid Chamran University of Ahvaz, Ahvaz,Iran.
3 PhD of Hydraulic Structures, Head of River and Coastal Eng., Iran Water and Power Development Company, IWPCO.