1. a METU, Civil Engineering Department , Water Resources Laboratory , Ankara, 06531, Turkey
2. b Cryospheric Sciences Branch NASA/Goddard Space Flight Center , Greenbelt, MD, 20771, USA
3. c SSAI/Cryospheric Sciences Branch, NASA/Goddard Space Flight Center , Greenbelt, MD, 20771, USA
4. d Anadolu University, Civil Engineering Department , Eskişehir, 26555, Turkey