Geosynthetic materials are mainly used to form an impervious medium against water infiltration and leakage during filling and concrete works in constructions. Besides, they are also used to protect the water quality in artificial lake constructions and, thus, selecting the best available geosynthetic material against leakage is important. This study investigates the effects of water, soil and materials used in design and construction of Osmanbey Campus Artificial Lake in Harran University. Sanliurfa, Turkey. It also provides some suggestions for the possible problems. Application of a geosynthetic material is analyzed in detail by considering the climatic conditions, workmanship. applicability and water quality assessment in this artificial lake.