1. Professor, Dept. of Water Resources Engineering, Faculty of Civil Engineering, Univ. of Tabriz, 51666 Tabriz, Iran; Professor, Dept. of Civil Engineering, Near East Univ., P.O. Box 99138, Nicosia, North Cyprus, Mersin 10, Turkey (corresponding author).
2. Dept. of Water Resources Engineering, Faculty of Civil Engineering, Univ. of Tabriz, 51666 Tabriz, Iran.
3. Ph.D. Student, Dept. of Water Resources Engineering, Faculty of Civil Engineering, Iran Univ. of Science and Technology, 51546 Tehran, Iran.
4. Professor, Dept. of Civil Engineering, Near East Univ., Turkish Republic of Northern Cyprus, Cyprus 99138, Turkey.