The Berdan (also Baradān or Baradā), the ancient Cydnus (Ancient Greek: Κύδνος, romanized: Kúdnos), is a river in Mersin Province, south Turkey. The historical city of Tarsus is on the river and it is therefore sometimes called the Tarsus River. Originally the watercourse passed directly through the city, but the section in Tarsus was changed to its present course in the 6th century. The river is also the location of Tarsus Waterfall. Geography. The main headwaters are in the Toros Mountains.
https://en.wikipedia.org/wiki/Berdan_River