Lena (river) facts for kids

Quick facts for kids Lena
The Lena Pillars along the river near Yakutsk
Lena watershed
Country	Russia
Physical characteristics
Main source	Baikal Mountains, Irkutsk Oblast 1,640 m (5,380 ft) 53°58′3″N 107°52′56″E / 53.96750°N 107.88222°E / 53.96750; 107.88222 (approximately)
River mouth	Lena Delta Arctic Ocean, Laptev Sea 72°24′31″N 126°41′05″E / 72.4087°N 126.6847°E / 72.4087; 126.6847
Length	4,294 km (2,668 mi)
Width	Maximum width: 10,000 m (33,000 ft)
Depth	Maximum depth: 28 m (92 ft)
Discharge (location 2)	Location: Vilyuy Average rate: 12,100 m3/s (430,000 cu ft/s) Tabaga, Yakutsk (Basin size: 987,000 km2 (381,000 sq mi) (Period of data: 1967-2017) 7,453.2 m3/s (263,210 cu ft/s)(max. 51,600 m3/s (1,820,000 cu ft/s))
Discharge (location 3)	Location: Olyokminsk Average rate: 4,500 m3/s (160,000 cu ft/s)
Discharge (location 4)	Location: Vitim Average rate: 1,700 m3/s (60,000 cu ft/s)
Discharge (location 5)	Location: Kirensk Average rate: 480 m3/s (17,000 cu ft/s)
Basin features
Basin size	2,460,742 km2 (950,098 sq mi) to 2,490,000 km2 (960,000 sq mi)
Tributaries	Left: Vilyuy Right: Kirenga, Vitim, Olyokma, Aldan

The Lena (Russian: Ле́на, IPA: [ˈlʲɛnə]; Evenki: Елюенэ, Eljune; Yakut: Өлүөнэ, Ölüöne; Buryat: Зүлхэ, Zülkhe; Mongolian: Зүлгэ, Zülge) is a river in the Russian Far East, and is the easternmost of the three great Siberian rivers that flow into the Arctic Ocean (the other two being the Ob and the Yenisey). The Lena is the eleventh-longest river in the world, and the longest river entirely within Russia, with a length of 4,294 km (2,668 mi) and a drainage basin of 2,490,000 km² (960,000 sq mi). Permafrost underlies most of the catchment, 77% of which is continuous.

Course

Map including the lower course of the Lena

Map including the upper reaches of the Lena

Originating at an elevation of 1,640 meters (5,381 ft) at its source in the Baikal Mountains south of the Central Siberian Plateau, 7 kilometres (4 mi) west of Lake Baikal, the Lena flows northeast across the Lena-Angara Plateau, being joined by the Kirenga, Vitim and Olyokma. From Yakutsk it enters the Central Yakutian Lowland and flows north until joined by its right-hand tributary the Aldan and its most important left-hand tributary, the Vilyuy. After that, it bends westward and northward, flowing between the Kharaulakh Range, part of the Verkhoyansk Range, in the east and the Chekanovsky Ridge in the west. Making its way nearly due north it expands into a large delta and ends in the Laptev Sea, a division of the Arctic Ocean, south-west of the New Siberian Islands. The Lena Delta is 30,000 square kilometres (12,000 sq mi) in area, being traversed by seven main branches, the most important being the Bykovsky channel, farthest east.

Basin

The area of the Lena river basin is calculated at 2,490,000 square kilometres (960,000 sq mi) and the mean annual discharge is 489 cubic kilometers per year. Gold is washed out of the sands of the Vitim and the Olyokma, and mammoth tusks have been dug out of the delta. There are numerous lakes in the floodplain of the river. Lakes Nedzheli and Ulakhan-Kyuel are the largest in the basin of the Lena.

Tributaries

The Kirenga flows north between the upper Lena River and Lake Baikal. The Vitim drains the area northeast of Lake Baikal. The Olyokma flows north. The Amga makes a long curve southeast and parallel to the Lena and flows into the Aldan. The Aldan also curves roughly parallel to the Lena until it turns east and flows into the Lena north of Yakutsk. The Maya, a tributary of the Aldan, drains an area almost to the Sea of Okhotsk. The T-shaped Chona-Vilyuy system drains most of the area to the west.

The main tributaries of the Lena are, from source to mouth:

History

It is commonly believed that the Lena derives its name from the original Even-Evenk name Elyu-Ene, which means "the Large River".

The river around 1890

According to folktales related a century later, in the years 1620–1623 a party of Russian fur hunters under the leadership of Demid Pyanda sailed up Nizhnyaya Tunguska, discovered the Lena, and either carried their boats there or built new ones. In 1623 Pyanda explored some 2,400 kilometres (1,500 mi) of the river from its upper reaches to the central Yakutia. In 1628 Vasily Bugor and 10 men reached the Lena, collected 'yasak' (tribute) from the 'natives' and then founded Kirinsk in 1632. In 1631 the voyevoda of Yeniseysk sent Pyotr Beketov and 20 men to construct a fortress at Yakutsk (founded in 1632). From Yakutsk other expeditions spread out to the south and east. The Lena delta was reached in 1633.

Two of the three groups of survivors of ill-fated Jeannette expedition reached Lena Delta in September 1881. The one led by engineer George W. Melville was rescued by native Tungus huntsmen. Of the group led by Captain George W. De Long only two of the men survived, the others died of starvation.

Baron Eduard Von Toll, accompanied by Alexander von Bunge, led an expedition that explored the Lena delta and the islands of New Siberia on behalf of the Russian Imperial Academy of Sciences in 1885. In 1886 they investigated the New Siberian Islands and the Yana River and its tributaries. During one year and two days the expedition covered 25,000 kilometres (16,000 mi), of which 4,200 kilometres (2,600 mi) were up rivers, carrying out geodesic surveys en route.

The Lena massacre was the name given to the 1912 shooting-down of striking goldminers and local citizens who protested at the working conditions in the mine near Bodaybo in northern Irkutsk. The incident was reported in the Duma (parliament) by Kerensky and is credited with stimulating revolutionary feeling in Russia.

Vladimir Ilyich Ulyanov may have taken his alias, Lenin, from the river Lena, when he was exiled to the Central Siberian Plateau.

Delta

Lena River Delta in Autumn 2014

Lena river Delta by Landsat, February 2000

At the end of the Lena River there is a large delta that extends 100 kilometres (62 mi) into the Laptev Sea and is about 400 km (250 mi) wide. The delta is frozen tundra for about seven months of the year, but in May the region is transformed into a lush wetland for a few months. Part of the area is protected as the Lena Delta Wildlife Reserve.

The Lena delta divides into a multitude of flat islands. The most important are (from west to east): Chychas Aryta, Petrushka, Sagastyr, Samakh Ary Diyete, Turkan Bel'keydere, Sasyllakh Ary, Kolkhoztakh Bel'keydere, Grigoriy Diyelyakh Bel'kee (Grigoriy Islands), Nerpa Uolun Aryta, Misha Bel'keydere, Atakhtay Bel'kedere, Arangastakh, Urdiuk Pastakh Bel'key, Agys Past' Aryta, Dallalakh Island, Otto Ary, Ullakhan Ary and Orto Ues Aryta.

Turukannakh-Kumaga is a long and narrow island off the Lena delta's western shore.

One of the Lena delta islands, Ostrov Amerika-Kuba-Aryta or Ostrov Kuba-Aryta, was named after the island of Cuba during Soviet times. It is on the northern edge of the delta.

See also

In Spanish: Río Lena para niños

• Lena Cheeks
• Lena Pillars
• Lena Plateau
• List of rivers of Russia
• List of longest undammed rivers
• Tukulan
• William Barr, writer of The First Soviet Convoy to the Mouth of the Lena.