Lena (river)

Lena River
The Lena Pillars along the river near Yakutsk
Lena River watershed
Native name	Лена, Зүлгэ, Елюенэ, Өлүөнэ Error {{native name checker}}: parameter value is malformed (help)
Location
Country	Russia
Physical characteristics
Source
• location	Baikal Mountains, Irkutsk Oblast, Russia
• elevation	1,640 m (5,380 ft)
Mouth	Lena Delta
• location	Arctic Ocean, Laptev Sea
Basin size	2,500,000 km2 (970,000 sq mi)
Discharge
• location	Laptev Sea
• average	16,871 m3/s (595,800 cu ft/s)
• minimum	366 m3/s (12,900 cu ft/s)
• maximum	241,000 m3/s (8,500,000 cu ft/s)
Discharge
• location	Kirensk
• average	480 m3/s (17,000 cu ft/s)
Discharge
• location	Vitim
• average	1,700 m3/s (60,000 cu ft/s)
Discharge
• location	Olyokminsk
• average	4,500 m3/s (160,000 cu ft/s)
Discharge
• location	Vilyuy inflow
• average	12,100 m3/s (430,000 cu ft/s)
Basin features
Tributaries
• left	Kirenga, Vilyuy
• right	Vitim, Olyokma, Aldan

The Lena (Template:Lang-ru, IPA: [ˈlʲɛnə]; Template:Lang-evn, Eljune; Template:Lang-sah, Ölüöne; Template:Lang-bua, Zülkhe; Template:Lang-mn, Zülge) is the easternmost of the three great Siberian rivers that flow into the Arctic Ocean (the other two being the Ob' and the Yenisey). With a mean annual discharge of 588 cubic kilometers per year, it is the second largest Arctic river after the Yenisey, and the largest river whose catchment is entirely within Russia. Permafrost underlies most of the catchment, 77% of which is continuous. Lena river is the eleventh-longest river in the world.

Course

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, being joined by the Kirenga River, Vitim River and Olyokma River. From Yakutsk it enters the lowlands and flows north until joined by its right-hand tributary the Aldan River and its most important left-hand tributary, the Vilyuy River. After that, it bends westward, flowing alongside the Verkhoyansk Range and then making its way nearly due north to the Laptev Sea, a division of the Arctic Ocean, emptying south-west of the New Siberian Islands by the Lena Delta – 30,000 square kilometres (11,583 sq mi) in area, and traversed by seven principal 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 (961,394 sq mi) and the mean annual discharge is 588 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.

Tributaries

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

History

Lena River from a source to Kachug
unnamed lake Tyrka Uhta 2nd Uhta 1st Pankukcha Shevukan Negnedai Anai River Anai Alilei Chanchur River Chanchur Kurungui Ilikta Kurungui River Maliy Tarel Birulka Ice bridge Birulka River Ushina Zhuya Bolshoi Kosogol Manzurka Khalsk R 148 Bolshiye Goly Iset R 148

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 Lower 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 Yeniseisk sent Pyotr Beketov and 20 men to construct an ostrog at Yakutsk (founded in 1632). From Yakutsk other expeditions spread out to the south and east. The Lena delta was reached in 1633.

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

See also: Fyodor Matisen

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.

Map of mammoth place near Sagastyr (from the 1886 Bulletin de l'Académie Impériale des Sciences de St.-Pétersbourg

Further reading

• Alexander von Bunge & Baron Eduard Von Toll (1887), The Expedition to the New Siberian Islands and the Yana country, equipped by the Imperial Academy of Sciences.

See also

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

References

• This article incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). "Lena". Encyclopædia Britannica. Vol. 16 (11th ed.). Cambridge University Press.

External links

• Arctic Great Rivers Observatory (ArcticGRO)
• NASA Earth Observatory page on flooding on the Lena River
• Information and a map of the Lena's watershed
• Permafrost in the Lena Delta
• Alfred Wegner institute (AWI) Publications, Berichte zur Polar- und Meeresforschung (Reports on polar and marine research) - free, downloadable research reports on the biology, geology, oceanography, hydrology, paleontology, paleoclimatology, fauna, flora, soils, cryology, and so forth of the Lena Delta, Laptev Sea, and other parts of the Arctic Circle.