Introduction
Dr. Khaled Osati was born in 1984 in Ahmadabad Panjeh village (Dehgolan/Kurdistan Province/Iran), received his B.Sc. degree in Range & Watershed Management from the University of Kurdistan in 2006. He also got his M.Sc. and Ph.D. degrees in Watershed management from the University of Tehran in 2008 and 2013, respectively. During his Ph.D., he attended a 6-months period, worked as a visiting researcher in Stable Isotope Laboratory of BGR (Federal Institute for Geosciences and Natural Resources), Hanover, Germany, under the supervision of Dr. Paul Koeniger, in 2012. During his M.Sc. thesis, his research areas focus on "unit hydrograph derivation from complex storms". He has analyzed rainfall-runoff data from four small watersheds at Central Alborz to test the accuracy of Collin's, Least-Squares, and Linear Programming methods for UH derivation and runoff hydrograph reconstruction. Since 2008, his research activities focus has been on groundwater-surface water interaction in karst areas (the Upper Karkheh River Basin). Besides using stable isotope for groundwater-surface water interaction studying, he has worked on the temporal trends of water quality and quantity in the mentioned research areas. Since 2010, he also has worked on different hydrological projects for Consulting Engineering companies such as Saz Ab Shafagh Co. and Homayoon Moshaver Co. Now he is working as an Assistant Professor in the Department of Range and Watershed Management, Faculty of Natural Resources, University of Kurdistan (UOK), Sanandaj, Iran. His research interests and activities focus on: • Stable Isotope in Hydrology and Water Resources Management • Rainfall-Runoff Modeling • HydroGIS • Water Quality • Trend Analysis and Statistical Methods in Hydrology & Water Resources Management • Geostatistics • Rainfall Simulator studies
