Ulakhan-Vava
The Ulakhan-Vava (Russian: Улахан-Вава; Yakut: Улахан-Вава) is a river in Yakutia (Sakha Republic), Russia. It is a left hand tributary of the Vilyuy, and is 374 kilometres (232 mi) long, with a drainage basin of 12,500 square kilometres (4,800 sq mi).[1]
| Ulakhan-Vava Улахан-Вава | |
|---|---|
 Ulakhan-Vava confluence with the Vilyuy Sentinel-2 image | |
  Mouth location in Yakutia, Russia | |
| Location | |
| Federal Subject | Yakutia |
| Physical characteristics | |
| Source | |
| • location | Vilyuy Plateau Central Siberian Plateau |
| • coordinates | 65°01′52″N 106°05′43″E |
| Mouth | Vilyuy |
• coordinates | 65°02′39″N 109°13′24″E |
| Length | 374 km (232 mi) |
| Basin size | 12,500 km2 (4,800 sq mi) |
| Discharge | |
| • average | 62 m3/s (2,200 cu ft/s) |
| Basin features | |
| Progression | Vilyuy→ Lena→ Laptev Sea |
The river flows across Mirninsky District; there are no permanent settlements in the area. The nearest inhabited place is Ekonda, located about 80 km (50 mi) to the NNW of the river source.[2]
Course
The Ulakhan-Vava belongs to the upper section of the Vilyuy basin. Its sources are in an elevated part of the Vilyuy Plateau, near the Krasnoyarsk Krai border. It heads roughly southeastwards in its upper course and bends to the northeast in its middle reaches and heads roughly eastwards meandering in the floodplain. Finally, shortly before its mouth it bends sharply northeastwards and meets the right bank of the Vilyuy 2,043 km (1,269 mi) from its mouth in the Lena. The confluence is almost opposite the mouth of the Sen in the facing bank.[3][4][5]
The main tributaries of the Ulakhan-Vava are the 101 kilometres (63 mi) long Khaim (Хайм), the 105 kilometres (65 mi) long Sengachanda, the 72 kilometres (45 mi) long Mayykta-Seene (Майыкта-Сээнэ) and the 194 kilometres (121 mi) long Kyuryungnekan (Кюрюнгнэкээн) from the right; and the 83 kilometres (52 mi) long Umotka and the 46 kilometres (29 mi) long Vava from the left. The river is fed by snow and rain. It freezes in October and stays under ice until early June.[6][1]
See also
References
- "Река Улахан-Вава in the State Water Register of Russia". textual.ru (in Russian).
- Google Earth
- "Q-49-50 Topographic Chart (in Russian)". Retrieved 5 April 2023.
- "Q-47-48 Topographic Chart (in Russian)". Retrieved 5 April 2023.
- Улахан-Вава — Great Soviet Encyclopedia in 30 vols. / Ch. ed. A.M. Prokhorov - 3rd ed. - M. Soviet Encyclopedia, 1969-1978
- Nature.ykt
