, image = Lena.svg , image_caption = Basin of the Lena with the Undyulyung in the upper right , source1_location =

Orulgan Range The Orulgan Range (russian: Орулган; sah, Орулҕан) is a range of mountains in far North-eastern Russia. Administratively the range is part of the Sakha Republic, Russian Federation.

Verkhoyansk Range The Verkhoyansk Range (russian: Верхоянский хребет, ''Verkhojanskiy Khrebet''; sah, Үөһээ Дьааҥы сис хайата, ''Üöhee Chaangy sis khaĭata'') is a mountain range in the Sakha Republic, Russia near the settle ...

, source1_coordinates = , source1_elevation = , mouth =

Lena Lena or LENA may refer to: Places * Léna Department, a department of Houet Province in Burkina Faso * Lena, Manitoba, an unincorporated community located in Killarney-Turtle Mountain municipality in Manitoba, Canada * Lena, Norway, a village in � ...

, mouth_location = , mouth_coordinates = , mouth_elevation = , progression = , subdivision_type1 = Country , subdivision_name1 =

Russia Russia (, , ), or the Russian Federation, is a List of transcontinental countries, transcontinental country spanning Eastern Europe and North Asia, Northern Asia. It is the List of countries and dependencies by area, largest country in the ...

, length = , discharge1_avg = , basin_size = , pushpin_map = Russia Sakha Republic , pushpin_map_size = , pushpin_map_caption= Mouth location in

Yakutia Sakha, officially the Republic of Sakha (Yakutia),, is the largest republic of Russia, located in the Russian Far East, along the Arctic Ocean, with a population of roughly 1 million. Sakha comprises half of the area of its governing Far Eas ...

, Russia The Undyulyung (russian: Ундюлюнг; sah, Үндүлүҥ) is a river in

Sakha Republic Sakha, officially the Republic of Sakha (Yakutia),, is the largest republic of Russia, located in the Russian Far East, along the Arctic Ocean, with a population of roughly 1 million. Sakha comprises half of the area of its governing Far Eas ...

(Yakutia),

. It is the 19th longest tributary of the

, with a length of and a drainage basin area of . There are no settlements close to the river. A great number of fish species are found in the waters of the Undyulyung, including

lenok Lenoks, otherwise known as Asiatic trout or Manchurian trout,James Card: Fly fishing in South Korea.' Retrieved 22 June 2015. are salmonid fish of the genus ''Brachymystax'', native to rivers and lakes in Mongolia, Kazakhstan, wider Siberia (incl ...

taimen Siberian taimen (''Hucho taimen''), also known as the common taimen (russian: Обыкнове́нный тайме́нь, Obyknovénnyĭ taĭménʹ), Siberian giant trout or Siberian salmon, is a species of salmon-like ray-finned fish from the ...

, whitefish,

perch Perch is a common name for fish of the genus ''Perca'', freshwater gamefish belonging to the family Percidae. The perch, of which three species occur in different geographical areas, lend their name to a large order of vertebrates: the Percif ...

, grayling,

pike Pike, Pikes or The Pike may refer to: Fish * Blue pike or blue walleye, an extinct color morph of the yellow walleye ''Sander vitreus'' * Ctenoluciidae, the "pike characins", some species of which are commonly known as pikes * ''Esox'', genus of ...

, ide, as well as the endangered Lena sturgeon. The river is a suitable destination for

rafting Rafting and whitewater rafting are recreational outdoor activities which use an inflatable raft to navigate a river or other body of water. This is often done on whitewater or different degrees of rough water. Dealing with risk is often a ...

.Water of Russia - Ундюлюнг
/ref>

History

On 11 September 1986 a

meteorite A meteorite is a solid piece of debris from an object, such as a comet, asteroid, or meteoroid, that originates in outer space and survives its passage through the atmosphere to reach the surface of a planet or Natural satellite, moon. When the ...

fell at the mouth of the Byukyakh (Бюкээх), a right tributary of the Undyulyung. The fall was observed by a helicopter crew.The Undyulyung meteorite - ResearchGate
/ref>

Course

The Undyulyung is a right

tributary A tributary, or affluent, is a stream or river that flows into a larger stream or main stem (or parent) river or a lake. A tributary does not flow directly into a sea or ocean. Tributaries and the main stem river drain the surrounding drainage ...

of the Lena. Its source is located in the southern sector of the

, west of the Echysky Massif. Its valley flanks the southern end of the Byrandia Range in its upper course and the southern side of the Kuyellyakh Range further downstream. The smaller Undyulyung Range rises on its right side upstream from the mouth in the Lena river.

Google Earth Google Earth is a computer program that renders a 3D computer graphics, 3D representation of Earth based primarily on satellite imagery. The program maps the Earth by superimposition, superimposing satellite images, aerial photography, and geog ...

Ундюлюнг
/

Great Soviet Encyclopedia The ''Great Soviet Encyclopedia'' (GSE; ) is one of the largest Russian-language encyclopedias, published in the Soviet Union from 1926 to 1990. After 2002, the encyclopedia's data was partially included into the later ''Bolshaya rossiyskaya e ...

; in 35 vols. / Ch. ed. Yu. S. Osipov. 2004—2017. In its first section the river flows across mountainous terrain forming

rapids Rapids are sections of a river where the river bed has a relatively steep gradient, causing an increase in water velocity and turbulence. Rapids are hydrological features between a ''run'' (a smoothly flowing part of a stream) and a ''cascade''. ...

. After leaving the mountains it flows into the

Central Yakutian Lowland The Central Yakutian LowlandJohn Kimble (ed.), ''Cryosols: Permafrost-Affected Soils'' or Central Yakutian Lowlands (russian: Центральноякутская равнина; sah, Саха сирин ортоку намтала), also known as ...

, splitting into two arms shortly before it joins the right bank of the Lena from its mouth.Nature.ykt
/ref> The river is surrounded by

mountain tundra Alpine tundra is a type of natural region or biome that does not contain trees because it is at high elevation, with an associated harsh climate. As the latitude of a location approaches the poles, the threshold elevation for alpine tundra gets ...

with shrub thickets and

subalpine Montane ecosystems are found on the slopes of mountains. The alpine climate in these regions strongly affects the ecosystem because temperatures fall as elevation increases, causing the ecosystem to stratify. This stratification is a crucial f ...

forests landscapes in its upper reaches. In its lower course there are sparse forests with

Dahurian larch ''Larix gmelinii'', the Dahurian larch or Gmelin larch, is a species of larch native to eastern Siberia and adjacent northeastern Mongolia, northeastern China (Heilongjiang), South Korea and North Korea. Description ''Larix gmelinii'' is a m ...

. The longest tributaries of the Undyulyung are the long Byukyakh and the long Tyrekhtyakh on the right, as well as the long Dabdzha on the left. The river freezes in October and stays under ice until May. Floods are common in the summer season. There are

ice field An ice field (also spelled icefield) is a mass of interconnected valley glaciers (also called mountain glaciers or alpine glaciers) on a mountain mass with protruding rock ridges or summits. They are often found in the colder climates and highe ...

s in the river basin with a total area of .

References

External links

Downriver Undyulyung - Hidden Siberia
Rivers of the Sakha Republic Verkhoyansk Range Central Yakutian Lowland {{Russia-river-stub

History

Course

See also

References

External links