Tromyegan

…and receives more tributaries: the Tromyegan (right), the Great (Bolshoy) Yugan (left), the Lyamin (right), the Great Salym (left), the Nazym (right), and finally, at Khanty-Mansiysk, the Irtysh (left). In its course through the taiga, the middle Ob has a minimal gradient, a valley broadening to 18 to 30 miles…