Burdur Lake has lost a quarter of its water during the last 20 years. The decline in the water level is still continuing. The annual water loss of the lake is approximately 40 hm 3. Under the current circumstances the decline in its water level will continue until it reaches 80 km 2 . At this level the water budget of the lake will balance. The main problem is that a large amount of water is extracted from its natural cycle for irrigation projects at the lake basin. The amount of water to be saved is 1.5 times the annual water loss of Burdur Lake if pressurized irrigation methods were used in place of surface irrigation methods.

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As a result of flood occurred on the delta of Ceyhan River in 1935, a crevasse splay of 25.8 km 2 (7.5 km wide, 4.4 km long) occurred and Ceyhan River formed a new channel of 9.1 km on this new splay directing the water at the southern edge of the delta. This crevasse splay converted 17.7 km 2 (57.3% of the whole lake) of Lake Akyayan of 30.9 km 2 into land. The development of crevasse splay finalized substantially until 1970s and Ceyhan River started to discharge into the Mediterranean Sea at the southern edge of the delta via one single channel on the splay.