Derbeke
Mouth location in Yakutia, Russia
Native name	Дэрбэкэ (Yakut)
Location
Federal subject	Yakutia, Russia
Physical characteristics
Source
• location	Khunkhadin Range
• coordinates	64°42′41″N 135°6′47″E / 64.71139°N 135.11306°E / 64.71139; 135.11306
• elevation	1,350 m (4,430 ft)
Mouth	Adycha
• coordinates	66°11′16″N 136°49′50″E / 66.18778°N 136.83056°E / 66.18778; 136.83056
• elevation	400 m (1,300 ft)
Length	389 km (242 mi)
Basin size	14,100 km2 (5,400 sq mi)
Discharge
• average	70 m3/s (2,500 cu ft/s)
Basin features
Progression	Adycha→ Yana→ Laptev Sea

The Derbeke (Russian: Дербеке; Yakut: Дэрбэкэ) is a river in the Republic of Sakha in Russia. It is a left hand tributary of the Adycha, of the Yana basin. It is 389 kilometres (242 mi) long, with a drainage basin of 14,100 square kilometres (5,400 sq mi).^[1]

It is an excellent river for boating, but it flows in an area without permanent population.^[2]

Course

The river begins in a rocky gorge in the eastern flank of the Khunkhadin Range, part of the southern section of the Verkhoyansk Range. It heads roughly north and northeast, leaving the Verkhoyansk mountains, and meandering slowly across a swampy area in the Yana Plateau with numerous lakes, including Emanda (Yakut: Эмандьа).^[3] The river gains speed again in its lower course at the feet of the southeastern side of the Nelgesin Range when it flows through a narrow mountain valley. Finally it joins the Adycha upstream from the Nelgese, the largest tributary.^[4]

The main tributaries of the Derbeke are the Tenkeli and the Kende. The river freezes in late September and is under thick ice until the end of May. For part of the winter it is usually frozen to the bottom.