Lake Düden Lake Düden Lake Düden, also known as Lake Kulu, ( or "Kulu Gölü"), is a brackish water lake in Konya Province, Turkey. Lake Düden is located northwest of Lake Tuz and east of Kulu town in Konya Province at an elevation of . It is a shallowh brackish water lake covering area. The lake is fed mainly by Kulu Creek, aka Değirmenözü Creek, in the west. It has no outlet. Spring waters around lake contribute also to the lake's feeding. There are nine islets inside the lake. In the south of the lake, there is a fresh water lake named
Lake Tuz Natural Gas Storage salt formation covers an area of . It is long and around thick. It has a salt dome structure. To create the caverns in the salt formation, fresh water was brought by pipeline from Hirfanlı Dam at distance. Using the process of solution mining, water was injected through a borehole into the salt formation, and the saline water, which is formed after dissolution of salt in water, was pumped back to the surface leaving a void in the formation. The salt water was transported to far away Lake Tuz by pipeline. Gas pressure inside the storage is nearly . The