Uyandina

The Uyandina (Уяндина; Уйаандьы) is a river in Yakutia, Russia, a tributary of the Indigirka. The length of the Uyandina is 586 km. The area of its drainage basin is 177000 km2.

Course
The river is formed by the confluence of the 211 km long Irgichyan originating in the NW Selennyakh Range and the 170 km long Baky, which has its source in Lake Baky, located at the junction of the western end of the Polousny Range and the Kyun-Tas. After flowing in a roughly southern direction in its upper course, the Uyandina flows then eastwards through the Aby Lowland. Finally it meets the left bank of the Indigirka 599 km from its mouth.

The Uyandina freezes up in October and remains icebound until late May or early June.

Tributaries
The biggest tributaries of the Uyandina are the 444 km long Khatyngnakh and 290 km long Khachimcher from the left, as well as the 213 km long Buor-Yuryakh from the right.