1. 
   Uaym
   (from the article `Tigris-Euphrates river system`) ...irrigation areas behind a number of dams. The Tigris, in contrast, flows down the edge of a long, multichanneled catchment basin and is fed by ... ...reaches 11,834 feet (3,607 metres). The region is heavily dissected by numerous tributaries of t...
   Found op http://www.britannica.com/eb/a-z/u/20
   
   

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