Here are some resources for the Manavgat River!

 

Hydropolitic Academy - A site with lots of info about Turkey's water management plans

Water Problems in the Middle East - This page details the background of how water plays a huge role in the Israeli/Arab conflict, and how Turkey (and the Manavgat) is involved

Drought in Turkey - Just a little blurb about the Manavgat in this article, but interesting to see it affected by drought!