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21-876: The landscape of the district is mostly flat. Its main rivers include the Lena and the Aldan . There are many lakes in the district, the largest of which are Lakes Myuryu , Oner , and Targyldzhyma . The district was established on January 9, 1930. As of the 2021 Census , the ethnic composition was as follows: The economy of the district is mostly based on agriculture. Divisional source: Population source: *Administrative centers are shown in bold Lena River (Period of data: 1970-1999)17,067 m /s (602,700 cu ft/s) Lena Delta , Laptev Sea , Russia (Period of data: 1984-2018)577 km /a (18,300 m /s) Tabaga , Yakutsk (Basin size: 987,000 km (381,000 sq mi) The Lena

42-611: A 86MW dam on the Mamakan River was completed, one of the first dams built on permafrost. Bodaybo , just upstream, a gold mining center founded in 1864. Upstream, the port of Luzhki was the start of a road to the Lena gold fields. From here upstream the river goes crookedly east and then south. About 240 kilometres (150 mi) upstream from Bodaybo are the Delyun-Uran Rapids and after 140 kilometres (87 mi) more,

63-474: A drainage basin of 225,000 square kilometres (87,000 sq mi). It is navigable from the Lena to Bodaybo. Upstream, tugs can haul barges as far as the Baikal Amur Mainline (BAM), but this is becoming rare. The Vitim is an excellent place for adventure rafting, but is rarely visited because of its isolation. Baissa , one of the famous localities of fossil insects is situated on

84-513: 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: It

105-430: 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

126-642: Is a river in the Russian Far East and is the easternmost river of the three, great rivers of Siberia , including the River Ob and the River Yenisey , which flow into the Arctic Ocean . The Lena river is 4,294 km (2,668 mi) long and has a capacious drainage basin of 2,490,000 km (960,000 sq mi); thus the Lena is the eleventh-longest river in the world and

147-748: 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. As Lena is located at remote and undeveloped regions of the Russian Far East, its fish resource is very well preserved. Some of the species found in the river include: Siberian taimen , Siberian sturgeon , Upper Yenisei grayling . Vitim (river) The Vitim ( Russian : Витим ; Evenki : Витым , Witym ; Yakut : Виитим , Viitim [local pronunciation] ; Buryat and Mongolian : Витим , Vitim )

168-549: Is a major tributary of the Lena . Its source is east of Lake Baikal , at the confluence of rivers Vitimkan from the west and China from the east. The Vitim flows first south, bends eastwards and then northward in the Vitim Plateau . Then it flows north through the Stanovoy Highlands and the town of Bodaybo . Including river Vitimkan, its western source, it is 1,978 kilometres (1,229 mi) long, and has

189-507: Is commonly believed that the Lena derives its name from the original Even-Evenk name Elyu-Ene , which means "the Large River". 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

210-523: 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. 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

231-756: The Central Siberian Plateau . 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

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252-764: The Lena-Angara Plateau , then is joined by three tributary rivers: (i) the Kirenga river, (ii) the Vitim river, and (iii) the Olyokma river. From Yakutsk , the Lena river enters the Central Yakutian Lowland and flows north until joined by the eastern tributary, the Aldan river , and the western tributary, the Vilyuy river . Afterwards, the Lena bends westwards and northwards, flowing between

273-620: 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

294-518: The Vitim River basin near Bodaybo on 25 September 2002. The event was probably caused by a bolide . The event was similar to Tagish Lake . Going upstream: Vitim town where the Vitim joins the Lena. Mama and Mama Airport , about 130 kilometres (81 mi) south of Vitim. A muscovite mica mine from 1705 until the late 1930s. Now a small settlement. Mamakan, on a west-flowing stretch 200 kilometres (120 mi) south-southeast of Vitim. In 1963

315-443: The left bank of the Vitim River. The first Russian to explore the river was probably Maksim Perfilyev in 1639–40, who brought back reports of the upper Amur River . Formerly, because of its swift current, goods were hauled 144 kilometres (89 mi) overland from Chita to Romanovka . There boats were built, floated down the river, and broken up at their destination. This lasted until the late 1940s. The Vitim event occurred in

336-545: The longest river entirely within Russia . Geographically, permafrost is the type of soil that underlies most of the Lena river's catchment , twenty per cent (20%) of which is continuous. The Lena river originates at 1,640 meters (5,381 ft) of elevation in the Baikal Mountains , 7 kilometres (4 mi) west of Lake Baikal , south of the Central Siberian Plateau . The Lena river flows north-east and traverses

357-491: The most important being the Bykovsky channel, farthest east. The Lena is navigable over a length of 3540 kilometres. The annual navigation period, when ice is minimally present or absent, lasts about 70 days in the estuarine region and 125 days elsewhere. 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

378-854: The mountains of the Kharaulakh Range to the east (part of the Verkhoyansk Range ) and the mountains of the Chekanovsky Ridge to the west. Travelling approximately due north, the Lena river widens into a great river delta that merges into the Laptev Sea , a marginal region 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,

399-402: 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

420-543: Was reached in 1655. Two of the three groups of survivors of the 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

441-515: 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

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