Generally rivers flow across the Yana Plateau from the south to the north, including the Yana River with its tributary Adycha and its tributaries Derbeke, Nelgese and Tuostakh, as well as the Sartang, Dulgalakh and Bytantay, among others. The middle courses of the Derbeke and the Nelgese, tributaries of the Adycha flowing northwards across the Yana Plateau, have swamps and numerous lakes, including Lake Emanda (), the largest lake in the area.